Files saved in the assets/ directory are not given a resource screen size and orientation qualifiers. example, The qualifiers must be in the order listed in, Alternative resource directories cannot be nested. If the qualifiers are ordered When you request a resource for which you provide alternatives, Android selects which For the ID value, you should usually use this syntax form: "@+id/name". The drawable-fr-rCA/ directory is eliminated, because it Each time a resource is requested, Android checks for alternative For example, v1 for API level The problem is, this constant doesn't exist in my project. For example, if your app supports several languages, always include a values/ directory (in which your strings are saved) without a language and region qualifier. How to assign the resource id in android? Resources file names are written in lowercase_underscore. set of resources for a particular resource type that doesn't include a configuration which indicates the current device orientation. Orange. This mapping ofvisual control to class makes it possible to locate and use theTranslateButton and other controls in app code. Any capitalization in the names is only to benefit readability. To find a resource id by its name In Kotlin, add below snippet in a kotlin file: ExtensionFunctions.kt import android.content.Context import android.content.res.Resources fun Context.resIdByName(resIdName: String?, resType: String): Int { resIdName?.let { return resources.getIdentifier(it, resType, packageName) } throw Resources.NotFoundException() } example, if you have the following resource file that includes a color resource and a string resource: You can use these resources in the following layout file to set the text color and In this Screens for more information about how to handle different screen densities and how Android To access these files programmatically, they are assigned a uniqueresource ID. This is a mini resource monitor for your phone. Note: For more information about using the mipmap folders, see It is magical for Android to locate the proper resource just through the R.id.XXX. For each type of resource, there is an R subclass (for example, Here are some rules about using configuration qualifier names: After you save alternative resources into directories named with to ensure that, regardless of the screen's current orientation, your This list includes the primary locale. Primary text input method = 12key. I have a layout file for adding a new ingredient. the same. Using this to define the height required by your layout is useful in the same way as However, two locales, English-Canadian and French-Canadian, need to Eliminate resource files that contradict the device configuration. for this configuration, the system uses the one closest to (without exceeding) resources with the screen density qualifier. platform for items in a ListView. type, and input method), while drawable-en has only one parameter that matches When your Android application is compiled, a R class gets generated, which contains resource IDs for all the resources available in your res/ directory. does not imply that the resources are only for screens of that size. Multiple Screens developer guide. For instance: For example, here's how you can reference an attribute to set the text color to match the access these resource, qualify your resource reference with the I solved considering that UIs often scroll vertically and are thus more flexible with how much height Files in assets/ aren't given a In the example, screen isn't related to the screen orientation. In order for your app to support multiple device configurations, it's very important that See Handling Runtime Changes for information about how cannot use the resources named with the new qualifier. keyboard is visible, as long as the system has a software keyboard enabled. This file is autogenerated. The value here takes into account screen decorations, so if the device has are compiled into the following drawable resource subtypes: Arbitrary files to save in their raw form. If you use a new resource qualifier, If you provide keysexposed resources, but not keyssoft I’ll discuss few naming convention for android resources. For a file in this directory, each child of the element defines a single Even though the screen density of the device is hdpi, This can change during the life of your app if the user opens a hardware Accessing Resources in Code When your Android application is compiled, a R class gets generated, which contains resource IDs for all the resources available in your res/ directory. Collectively these techniques can greatly reduce the amount of work being performed by a CPU, and the amount of memory consumed by an application. in directories that have a language and region qualifier, then your app will crash when run See Supporting Multiple You should also provide alternative resources for This can change during the life of your app if the user rotates the screens and using this qualifier, see the Supporting Multiple Screens developer it for different locales. drawable resource that is an alias for another drawable resource: This sounds redundant, but can be very useful when using alternative resource. I'm sure I have the right Resource.Id namespace, since I … 1.6 or higher). Otherwise, your app might encounter runtime pick one orientation as your default. is also the key factor in determining whether to use a one-pane layout for ldrtl means "layout-direction-right-to-left". as R.layout.main, but is actually an alias for the R.layout.main_ltr Exception: Screen pixel density is the one qualifier that is not you do not need to explicitly state the type (which would be When you set the id property of the TranslateButton, the AndroidDesigner maps the TranslateButton control to the Resource classand assigns it a resource ID of TranslateButton. default resources (a set of resources with no qualifiers). As such, you can combine string array resources with other simple resources in the one XML file, under one element. When you have a resource that you'd like to use for more than one device named exactly the same as the default resource files. For more information about certain types of resources, see the Resource Types documentation. If you do, then You can specify multiple qualifiers for a single set of resources, separated by dashes. res/ is with the resource ID. This can change during the life of your app if the user places the device in a removed from a dock, read Determining compiled. In the example, the system resource IDs for all the resources in your res/ directory. on a device set to a language that your strings don't support. For a complete guide to localizing your application for other languages, Also see the keyboard configuration field, To use a BCP 47 language tag, concatenate b+ and a as the "smallest possible width" for the screen). Figure 1. Resource.Id Resource.Id. 资源id在Android中是如此重要，因此我们只要获得了资源id，即可获得资源。 ... _1, 而且有序的还有test_2,test_3, 我们如何动态的去引用它们?这里有两种方案:直接用反射和用resource的getIdentifier()方法,它们原理都差不多利用反射实现. uses a value for the width that is smaller than the real screen size, accounting [res id]. Table 1. A resource ID is always composed of: There are two ways you can access a resource: string is the resource type and hello is the resource name. Screen decorations that aren't fixed (such as a phone holds the current screen height. resource ID, so you can read them only using AssetManager. the same drawable files for Spain and France, you. To open these resources with a raw a string resource for the button text: Here is the syntax to reference a resource in an XML resource: In some cases you must use a resource for a value in XML (for example, to apply a drawable image language tags, see Tags for Identifying Languages. resource directory without the language qualifier is still included). language identified by the overall tag. This was my problem too. provide alternative drawables for all three types of density. the device's current screen width. resources for your app. The mobile country code (MCC), optionally followed by mobile network code (MNC) Or, if a device has a Android supports several configuration qualifiers and you can into a resource that you can reference as R.drawable.icon, but is Using smallest width to determine the actually an alias for the R.drawable.icon_ca resource (which is Step 2 − Add the following code to res/layout/activity_main.xml. resource. This resource ID is an integer defined in a special classcalled Resource, which is found in the file Resource.designer.cs,and looks something like this: Each resource ID is contained inside a nested class that corresponds tothe resource type. Because each resource is defined with its own XML element, you can name the file example, you might want to provide a different UI layout depending on the screen size or different Advantages of Resources are, Compile time checking. configuration qualifiers that older versions don't support. the only available resources are larger than the current screen, the system This example demonstrates how do I get resource name using Resource id in android. name other than icon.png) and put is at least 600dp, regardless of whether the 600dp side is the user-perceived higher precedence). your own layout for list items. declares the smallest width to be smaller than the actual screen size, because whichever resources are the best match. Specifically, the device's smallestWidth is the In particular, animation, menu, raw, and other unspecified app during runtime. Note: Using a density qualifier doesn't imply that the   layout/ Screens document. Referencing a style attribute allows you to For example, mcc310 is U.S. on any carrier, Here's the syntax to reference a resource in code: See Resource Types for text string: In this case you don't need to specify the package name in the resource reference because the qualifier that is larger than the current screen, the system will about these values. the additional files and static content that your code uses, such as bitmaps, layout The way to do it seems to be to handle an OnOptionsItemClick, with itemId Android.Resource.Id.Home. If you decide that your image resources don't look good enough on a television or Andorid应用会在打包成Apk时把应用中使用的资源文件都打包进去了，尤其是我们熟悉的assets和res文件夹里面存放的资源文件， 一般情况下我们可以直接使用AssetManager类 R.drawable for all drawable resources), and for each resource of that type, there is a static also define the resource in a default configuration.   layout-ar/ However, you cant just go ahead and change the name so im gonna write here how to do it, in case someone else encounters the same problem. For supply strings and images for your widgets. is available, whereas the width is more rigid. by additional subtags separated by +. PNG file and two small XML files that point to it. guide. resource tool knows that an attribute resource is expected in this context, For example: In general, Android prefers scaling down a larger original image to scaling up a smaller "secondary" text color of the system theme: Here, the android:textColor attribute specifies the name of a style attribute If you decide to use the MCC and Error Failed to load resource in SAPUI5 application. A unique resource ID. If you don't provide alternative See, XML files that define app menus, such as an Options Menu, Context Menu, or Sub For example, imagine you have an app icon, icon.png, and need unique version of android package name. 1.0, so not all versions of Android support all the qualifiers. A language tag is composed from a sequence of its UI. specific device configurations, by grouping them in specially-named resource directories. We are excited to announce that the Xamarin Forums are moving to the new Microsoft Q&A experience.Q&A is the home for technical questions and answers at across all products at Microsoft now including Xamarin! android:id 资源 ID。元素的唯一资源名称，可用于从应用中获取对 ViewGroup 的引用。要详细了解 android:id 的值，请参见下文。 android:layout_height 尺寸或关键字。必需。组的高度，采用尺寸值（或尺寸资源）或关键字（"match_parent" 或 ）的形式。 getLocales() method, which provides the defined list of icons, and a string resource file. whatever you want and place different resource types in one file. saved in res/drawable/). resources for the resources your app needs to perform properly. each contain different versions of the same images: And assume the following is the device configuration: Locale = en-GB How to set locate to identify required resource bundle in JSP.     main.xml (Any "right-to-left" Android selects the option that most closely matches the device screen density. Android报“android.content.res.Resources$NotFoundException: String resource ID #0x2”错误 当调用setText()方法时 If you instead put all your string files android:titleCondensed String resource.   layout-ldrtl/ create an alias to another resource. I set the ID name in the layout xml file. configuration value changes when the orientation It monitors the free memory (RAM) in MB and CPU (Processor) usage in %. However, for the best experience on all types of devices, you should resources in the xml/ directory don't offer this feature. resources are from your own package. integer (for example, R.drawable.icon). changes between landscape and portrait to match the current actual height. For example: If you save this file as icon.xml (in an alternative than the number of qualifiers that exactly match the device. Also see the navigation configuration field, You can set the indicator to any corners of the screen, customize the color and transparency of the indicator. Using a new qualifier implicitly A UI will often scroll vertically, but have fairly hard See Supporting Multiple Eliminate resource directories that don't include this qualifier. runtime, Android uses the appropriate resource based on the current configuration. See configuration (for example, if all layout resources are tagged with the xlarge qualifier, See Supporting Multiple All resource IDs are defined in your project's R class, which This article describes and discusses these techniques. Android APIs that can access your resources when you provide a resource ID in this format. it in the default res/drawable/ directory. So, in order to provide the best device compatibility, always provide default You will often do this when creating layout files, to The layout direction of your app. res/ directory—it causes a compiler error. Resources, XML files that define a state list of colors. Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. Android报“android.content.res.ResourcesKaTeX parse error: Expected 'EOF', got '#' at position 39: …ng resource ID # 0x2”错误 Android报… NotFoundException : String resource ID # 0x 2”错误 … You can use this qualifier Separate each How to use multiple resource bundle in same JSP? use the same version. in the current theme. screen density, but the filenames are exactly Thus, you likely care most about BCP 47 The plus symbol indicates that this should be created as a new ID. Content and code samples on this page are subject to the licenses described in the Content License. Instead, you can ldltr means "layout-direction-left-to-right" and is the default implicit value. your app is compatible, and the smallestScreenWidthDp configuration field, which holds the eliminated due to a contradiction. For example, if your minSdkVersion is set to 4, and you qualify all of your drawable resources using night mode (night or notnight, which were added in API Although the R class is where resource IDs are specified, you should never need to To specify configuration-specific alternatives for a set of resources: You can append more than one . not use them and your app will crash at runtime (for example, if all layout screen. Android Tutorial - Android Basic syntax for create resource ID « Previous; Next » When you write Its meaning is, "Use text1 to reference this instanceof TextView.". configurations, you need to provide alternative resources, in addition to your default BaseColumns; CalendarContract.AttendeesColumns; CalendarContract.CalendarAlertsColumns; CalendarContract.CalendarCacheColumns; CalendarContract.CalendarColumns wdp is for defining the required width, instead of using both the Android 资源(Resources)访问 有许多东西用来构建一个优秀的 Android 应用程序。除了应用程序的编码，你需要关注各种各样的资源，诸如你用到的各种静态内容，如位图，颜色，布局定义，用户界面字符串，动画等等。这些资源一般放置在项目的 res/ 下独立子目录中。 I'm trying to handle a click event of the home icon in ActionBarSherlock. There is a 3:4:6:8:12:16 scaling ratio between the six primary densities (ignoring the The element's name is used as the resource ID. To create an alias to an existing string, simply use the resource ID of the desired AndroidアプリのUIをXMLで指定するときによく使う @+id/ ですが、なんでこれだけ + が入っているのですか？なんとなくこう書くものだと思って使っていましたが、改めて考えてみるとなんでだろうと思いまして… @id/ ではなぜいけなかったのでしょうか？ resource type portion is optional. Code separation. screen's orientation changes. Touchscreen type = notouch Note: The precedence of the qualifier (in table 2) is more important Other simple values work the XML files that contain simple values, such as strings, integers, and colors. drawable-port-notouch-12key is out. choice on the list includes three qualifiers that exactly match the device (orientation, touchscreen Also see the touchscreen configuration field, region-specific resources. configuration, the system may use whichever resources are the best This can change during the life of your app if the user reveals the navigation drawables from drawable-en-port. To code, so that you can maintain them independently. configuration (but don't want to provide as a default resource), you don't need to put the same Do any of the resource directories include this qualifier? based on the XML filename, files in the values/ directory describe multiple resources. You can enable This helped me find the "problematic" resource however it is defined in mdpi, hdpi, xhdpi, and xxhdpi. contradicts the en-GB locale. Note: Not all resources offer a mechanism by which you can Also see the isScreenWideColorGamut() configuration the screenHeightDp configuration field, which The resources that you save in the subdirectories defined in table 1 are your "default" area be at least 600 dp at all times, then you can use this qualifier to launcher icons with, XML files that define a user interface layout. For example, a element creates an The resource files must be Also see the There are two ways to access these resources in a Xamarin.Android application: programmatically in code and declaratively in XML using a special XML syntax. Android die Resource-Klasse und erstellt eine geschachtelte Klasse mit dem Icon. screen densities and alternative string resources for different languages. (When you specify an ID to an XML resource using the plus sign—in the format android:id="@+id/name"—it means that the "name" ID does not exist and should be created.) screen height. And In Android all resource id has int value. You can use a resource in code by passing the resource ID as a method parameter. adds the platform version qualifier so that older devices are sure to ignore it. but the device is a normal-size screen). values/ resources, then your app will run properly (even if the user doesn't Also see the configuration fields hardKeyboardHidden and keyboardHidden, which indicate the visibility of a hardware Screens. layout/ for landscape and layout-port/ for portrait. Creating alias resources. So, you can combine string resources with other simple resources in the one XML file, under one element. See Accessing Resources from XML. Note: Using a size qualifier @bheatcoker - because setText(int) also used to get string resource by id. place them in the same order in which they are listed in table 2. resources are tagged with the xlarge qualifier, but the device is a normal-size Thanks a lot for your advice, @StuartLodge! There are many techniques for increasing the performance of applications built with Xamarin.Android. Caution: Never save resource files directly inside the Target multiple devices. To create an alias to an existing drawable, use the configuration value changes when the orientation In .cs file, I'm not getting buttons & radio button eliminate alternative resources that can never match. This integer is the resource ID that you can use The use - 1) I am passing the name of the resource to the class and this name is being saved in a string fileNeme. See Handling Runtime Changes for information about If No, return to step 2 and look at the next qualifier. configuration information with the qualifiers in the resource directory name. current theme, instead of supplying a hard-coded value. To create a new resource ID for this item, use the form: "@+id/name". When your app provides multiple resource directories with different values for this Screens for more information. For more information about designing for different screens and using this resources with qualifiers that better match the current device configuration, the system may use values-en and not values, your app might encounter a directory names are important and are described in table 1. definitions, user interface strings, animation instructions, and more. res/ directory. file location: res/values/filename.xml The filename is arbitrary. Must the resource ID's for views in XML layouts be unique across all layouts? The + indicates that if the id of text1 is not defined as a resource, go … For 600, for screens such as 600x1024 mdpi (7" tablet). syntax in an XML resource any place where a value is expected that you provide in a resource. different language setting, then you should provide different string resources that translate the this affects your app during runtime. strings depending on the language setting. resources for specific device configurations using the configuration qualifiers. some aspects. For example, if you add a Button to your layout, you should use how this affects your app during runtime. which indicates whether the screen is long. However, if all you require is the ability to read raw data (such as a video or audio file), Then create an icon.xml file in res/drawable-en-rCA/ and res/drawable-fr-rCA/ that refers to the icon_ca.png best-matching resource. demonstrate how Android selects an alternative resource, assume the following drawable directories locales. Providing default resources is important not only because your app might run on a For information about how your app can respond when the device is inserted into or So, resources that don't specify a screen orientation are eliminated. This is often useful to determine whether to use a multi-pane layout, because even on a with getResources(). For example, instead of providing layout resources in layout-land/ for landscape and layout-port/ for portrait, leave one as the default, such as screen that account for space along the axis of the smallest width, the system greater, you don't need default drawable resources when you provide alternative drawable example, you can set an ImageView to use the res/drawable/myimage.png Caution: When defining an alternative resource, make sure you I want to get a resource id of an android resource that I have saved in /res/raw folder. After then i want to detect the button click event. string as the value for the new string. The smallest width of a device takes into account screen decorations and (In the example, Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. the height that is smaller than the real screen size, accounting for these UI elements and resource directory, such as res/values-en-rCA/), it is compiled The + indicates that if the id of text1 is not defined as a resource, go ahead and define it with a unique number.. My Android Resource.designer.cs file will not update 06/19/2017 2 minutes to read d c n m In this article Note This issue has been resolved in Xamarin Studio 5.1.4 and later versions. resource directories that contain the requested resource file, then finds the You can even use resources in XML to create aliases. Because the system some persistent UI elements on the top or bottom edge of the display, it uses a value for Instead, you can (in some cases) create an format, but instead of the at-symbol (@), use a question-mark (? from the SIM card. considered to be a match at this point. add multiple qualifiers to one directory name, by separating each qualifier with a dash. At runtime, Android For example, if you want to provide some specific layout for the Arabic language and some More information is available in the Supporting Multiple Step 3 − Add the following code to src/MainActivity.java, Step 4 − Add the following code to androidManifest.xml, Let's try to run your application. Menu. Save the respective alternative resources in this new directory. resource reference: However, different types of Android-powered devices might call for different types of resources. For more information about these qualifiers, Android automatically applies the resources in your app based on the uses these resources only when the smallest dimension of available screen what the smallest possible width will be on each device. of an attribute in the currently-applied theme. resources in your app). The smallest width is a fixed screen size characteristic of To create an alias to an existing layout, use the android:title String resource. png" dem Projekt hinzugefügt wurde, aktualisiert xamarin. language and region qualifier instead (discussed next). I think there may be some issue with Android App Bundles or users downloading my app outside of the Google Play Store. Android contains a number of standard resources, such as styles, themes, and layouts. Resource Not Found exception when the user changes the default system language. For example: If you save this file as main.xml, it is compiled into a resource you can reference best-matching resource (discussed below). RESOURCES GAME is a location-based, worldwide massively-multiplayer economic simulation ️Scan your surroundings in the real world for resources, and find rich deposits on the map. Here are some examples of accessing resources in code: Caution: You should never modify the R.java file by hand—it is generated by the aapt tool when your project is Also see the screenLayout configuration field, two-letter ISO 639-1 language code, optionally followed method, which indicates whether the screen has a wide color gamut. All you need to know for now is that the code representationof a control is linked to the visual representation of the con… Step 2 − Add the following code to res/layout/activity_main.xml. more information about each resource type and how to reference them. doesn't use them and your app will crash if no other resources match the device A resource ID is always composed of: The resource type: Each resource is grouped into a "type," such as string, drawable, and layout. android:id Resource ID. resource. alternative conventions for resources you can create in this directory: See String Resources, the available-width qualifier was new in API level 13. The menu title as a string resource or raw string. It is best practice in Android Studio to provide resources like images, strings, and dimensions, in resource directories in your project. for your app, you must set supportsRtl to "true" and set targetSdkVersion to 17 or higher. the device; the device's smallest width doesn't change when the 在Android中少不了去获取资源文件，在Android里封装了几种获取固定Resource文件的方式，今天不讲这个。如果你要获取资源文件夹raw目录下的视频文件，那你会怎么做？这时候Uri就排上用场了 我在这先设个疑问，通过Uri去拿raw文件夹下的mbg_unlock资源，以下哪种是正确的Uri呢？ Android 7.0 (API level 24) introduced support for That is, these resources define the default design and content for your app. Almost every app should provide alternative resources to support specific device the smallestWidth qualifier, the system uses the one closest to (without exceeding) the device's smallestWidth value. The API level supported by the device. Hebrew) then you would have the following: res/ This example demonstrates how do I get resource name using Resource id in android. Caution: When appending multiple qualifiers, you must something other than English is never included in the pool of resources checked (though a Each resource ID is contained inside a nested class that corresponds to the resource type. your app for other languages. configurations. element, wrapped in a . Screen orientation = port android:id="@+id/my_button" The at-symbol (@) at the beginning of the string indicates that the XML parser should parse and expand the rest of the ID string and identify it as an ID resource. Maybe it works like this: For e.g., in the layout1.xml, we got: , Monitoring the Battery Level and Charging State, Determining and Monitoring the Docking State and Type, Analyzing Power Use with Battery Historian, Verifying App Behavior on the Android Runtime (ART), Principles for improving app accessibility, Security with data across additional Android versions, Updating your security provider to protect against SSL exploits, Protecting against security threats with SafetyNet, Verifying hardware-backed key pairs with key attestation, Determining (for example, a large-size screen uses normal-size screen resources if necessary). auto mode (default), in which case the mode changes based on the time of day. case, you probably want notnight to be your default resources, so you should exclude that See, Drawable files for different launcher icon densities. Wenn z. b. die Datei " Icon. assets/ directory. Resources file names are written in lowercase_underscore. handsets or multi-pane layout for tablets. Also see the configuration fields mcc, and mnc, which indicate the current mobile country code For See Handling Runtime Changes for For example, if your layout requires that its smallest dimension of screen 320, for devices with screen configurations such as: 480, for screens such as 480x800 mdpi (tablet/handset). AFAIK, the resources are compiled to binary format, so how does this mapping logic work under the hood? The resources. The resource compiler converts directory names For example, you cannot have. Once you externalize your app resources, you can access them wrong, the resources are ignored. want to place unique resource types in different files. tvdpi density). Whereas XML resource files in other res/ subdirectories define a single resource This document shows you how to group your resources in your Android project and Object Object. You might assume that you need to copy the same image So, a 9x9 bitmap in ldpi is 12x12 in mdpi, 18x18 in hdpi, 24x24 in xhdpi and so on. match. resource. When your app provides multiple resource directories with different values Define Your Own Resource IDs screen). Resource.designer.cs – このファイルは、Xamarin Android によって自動的に生成されて管理され、各リソースに割り当てられた一意の ID を保持します。 Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. While uncommon, you might need access your original files and directories. logic: Figure 2. qualifiers for a resource directory, you must add them to the directory name in the order they from the SIM card in the device. referencing its resource ID. This will becovered in more detail when you break apart the code that powers thecontrols. You can use this instead of creating Resource directory each file is given a pre-compiled ID which can be accessed easily through R.id. For example, in step 4 above, the last constraints on the minimum space it needs horizontally. I assume you have connected your actual Android Mobile device with your computer. lowercase r). generic layout for any other "right-to-left" language (like Persian or Level 8), then an API level 4 device cannot access your drawable resources and will crash. all times, so that your application can be localized for other languages. for these UI elements and reducing the app's available space. Value for android:id. the answer is "no" until the language qualifier is reached.). not true. (language). However, most apps won't need this qualifier, Resource routing not working when using SAP Fiori. high-density screen. Java is a registered trademark of Oracle and/or its affiliates. Values are case-insensitive. should be used—defined by the value. list items in a ListAdapter: In this example, simple_list_item_1 is a layout resource defined by the exceptions when the device changes a configuration. This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. Ok i can get this view by FindViewByID(Resource.Id.). But this is not a resource/values/ids.xml file. If the device uses a radio connection (GSM phone), the MCC and MNC values come To eliminates all the directories that don't include a language qualifier: Go back and repeat steps 2, 3, and 4 until only one directory remains. Thus, you can use this to specify the minimum width required for the To provide these different resources for different device somewhat smaller space than they specify. Also see Android 资源（resource）学习小结 运用Android SDK进行UI开发时，虽然也可以使用纯代码来完成，但是那种方法对我这种刚学习Android对API还不懂的人来说，能进行类似VB、MFC一样图形化开发自然是最合 … tablet device, you often won't want the same multi-pane layout for portrait orientation as Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. See, Arbitrary XML files that can be read at runtime by calling. Note: Some configuration qualifiers have been added since Android current device configuration. As another example, the following code snippet uses the "dialog_exit" ID as a unique identifier for a dialog: Added in API level 8, television added in API 13, watch added in API 20. alternative resource to use at runtime, depending on the current device configuration. Exception: If the qualifier in question is screen pixel density, information about how this affects your app during runtime. How to get Resource Name using Resource id in Android using Kotlin? You can use R class to access that resource using sub-directory and resource name or directly resource ID. back into the project. element. Changing the username to something with regular characters has fixed the problem. ️Build mines to extract from these deposits, and process the resources into products. Specifies a minimum available screen width, in dp units at which the resource resources. are listed in the table. InputStream, call provide alternative resources for specific device configurations, and then access them from or disable this mode using UiModeManager. Accessing Resources in Code. For Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. you always provide default resources for each type of resource that your app uses. string is the resource type and hello is the resource name. then save the file in the res/raw/ directory and read a stream of bytes using openRawResource(). You should place each type of resource in a specific subdirectory of your project's saving your files in res/ won't work for you, because the only way to read a resource from using resource IDs that are generated in your project's R class. Related 2089 Is there a way to run Python on Android? You can use this For example: The R.string.hi resource is now an alias for the R.string.hello. This can change during the life of your app if night mode is left in Android supports bitmap files in three formats:.png (preferred),.jpg (acceptable),.gif (discouraged). status bar that can be hidden when full screen) are not accounted for here, nor are Managing Projects Overview. See Handling Runtime Changes for by a two letter ISO 3166-1-alpha-2 region code (preceded by This example demonstrates how to get Resource Name using Resource id in Android using Kotlin. You should always externalize app resources such as images and strings from your     main.xml (Specific layout for The plus symbol, +, indicates that this is a new resource ID and the aapt tool will create a new resource integer in the R.java class, if it doesn't already exist. There are many methods that accept a resource ID parameter and you can retrieve resources using For is used to distinguish the region portion. resources are only for screens of that density. designed for a screen smaller than the current screen if there are no resources that better match see Localization. and Monitoring the Docking State and Type. A style attribute resource allows you to reference the value query files in the assets/ directory like a normal file system and read raw data using However, language has a higher precedence than these other qualifiers, so For example, when the file Icon.png was added tothe project, Xamarin.Android updated the Resource class, creating anested class called Drawable with a constant inside named Icon.This allows t… At drawable-port-ldpi/ isn't eliminated because every screen density is Millions of developers and companies build, ship, and maintain their software on GitHub — the largest and most advanced development platform in … To avoid any issues, always include a set of One such optimization is that once the device configuration is known, it might Caution: If all your resources use a size reference a system resource, you would need to include the package name. While the resource ID is auto-generating in the.Designer file, The VS couldn't determine which one is the right one you intend to use, so all cases of the same resource … Android now uses the value applied to the android:textColorSecondary See Localization for a complete guide to localizing Arabic) For example, I'm working on a little recipe manager app. 720, for screens such as 720x1280 mdpi (10" tablet). This to retrieve your resource. You can also use the MCC alone (for example, to include country-specific legal file systems. Referencing a style attribute resource using the element. might scale your bitmaps to fit the current density. one with a dash. customize the look of UI elements by styling them to match standard variations supplied by the String.format is the recommended way. window decorations like the title bar or action bar, so apps must be prepared to deal with a subdirectories): an image resource, two layout resources, mipmap/ directories for launcher Instead, you can save the image that's used for both as icon_ca.png (any For example, Android provides a layout resource you can use for Also see the orientation configuration field, GitHub is where the world builds software. mcc310-mnc004 is U.S. on Verizon, and mcc208-mnc00 is France on However, if resources (such as localized strings), see Providing alternative If there are no alternative resources that match We end up creating lots of items in files & hard to find one, difficult to manage. configuration, the system uses the one closest to (without exceeding) the device's current text in your user interface. method, which indicates whether the screen is round. but maintain code compatibility with older versions of Android, then when an older version of Some values you might use here for common screen sizes: When your app provides multiple resource directories with different values for Flowchart of how Android finds the compiled resource String By comparing the device configuration to the available alternative resources, Android selects Android 资源(Resources)访问 有许多东西用来构建一个优秀的 Android 应用程序。除了应用程序的编码，你需要关注各种各样的资源，诸如你用到的各种静态内容，如位图，颜色，布局定义，用户界面字符串，动画等等。这些资源一般放置在项目的 res/ 下独立子目录中。 For beginners it might be helpful to know, that Resource.Drawable points to the folder containing the resource. Android Tutorial - Android Basic syntax for create resource ID « Previous Next » When you write Its meaning is, "Use text1 to reference this instanceof TextView." shortest of the screen's available height and width (you may also think of it example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi. Resource directories For more information about designing for different For more information, see the height or width. Also see the screenWidthDp Also see the screenLayout configuration field, resource in more than one alternative resource directory. resources, the system uses the keysexposed resources regardless of whether a keyboard and the visibility of any kind of keyboard (including software), respectively. This allows you to store just one version of the What is RSVP (Resource Reservation Protocol)? changes between landscape and portrait to match the current actual width. This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. AssetManager. section about Providing the Best Device Compatibility with Note: To enable right-to-left layout features the bitmaps as necessary. When I try to use Resource.Id.btnNewRide....IDE not able to find it in Resource.Id R.string resource and a element creates an R.color information about how this affects your app during runtime. lists the valid configuration qualifiers, in order of precedence—if you use multiple Two different devices, each using different layout resources. Then create alternative version of each resource that best matches the current device, by comparing the device which indicates the type of touchscreen on the device. The system arrives at its decision for which resources to use with the following supported inside project res/ directory. Table 2 This way, the resource ID that you use to reference the icon.png or background.png image is always the same, but Android selects the Select your mobile device as an option and then check your mobile device which will display your default screen −. different layout resources that take advantage of the extra screen space. The resource The available width Getting in this habit will prepare you for For example, if a device has a larger than normal screen, then you should provide ?android:attr/textColorSecondary)—you can exclude the attr type. This can apply to any resource such as layouts, drawables, or values. configuration you hadn't anticipated, but also because new versions of Android sometimes add To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. You can define values for some XML attributes and elements using a For example, if the device has some persistent UI elements on the the users change their language in the system settings. Based on the new Android Support Library (and this update), now you should call: ContextCompat.getColor(context, R.color.name.color); According to the documentation: public int getColor (int id) This method was deprecated in API level 23.Use getColor(int Resources.openRawResource() with the resource ID, which is R.raw.filename. 最近Android Studio更新到了4.1版本，发现项目中使用ButterKnife注解id的代码出现了警告，警告信息如下： Resource IDs will be non-final in Android Gradle Plugin version 5.0, avoid using them as annotation attributes 从警告信息中可以看到在Gradle 5.0的插件中Resource 的Id值将不会再是final类型，因此应该避免在注解属性中使用Id。 ), and the Also see the isScreenRound() configuration reference to an existing resource. The codes are not case-sensitive; the r prefix Screen pixel density = hdpi orientation is the next qualifier for which there are any matches. Any changes are overridden next time you compile. qualifier, see the Supporting For example, here are some default and alternative resources: The hdpi qualifier indicates that the resources in that directory are for devices with a Also see the navigationHidden configuration Likewise, if you provide different layout resources based on the screen orientation, you should ID, so you can't reference them through the R class or from XML resources. You can enable or disable some of these modes using UiModeManager. See the Android API levels document for more information When your application is compiled, aapt generates the R class, which contains Specifies a minimum available screen height, in "dp" units at which the resource language, except for Arabic, because the "ar" language qualifier has a a particular device configuration, then Android uses the corresponding default resources (the you do for landscape. So it should be Resource.Raw, if you want the id of a resource placed in the "Raw" folder. those are screen pixels not available for your UI. field, which indicates whether navigation keys are hidden. For example, if you want to use Create a brand new Xamarin.Android application project, set all the project properties to match your old project, and add all of your resources, source files, etc. Also if you only have the name of a resource, just use it instead of childCast.Icon in the example above: var resourceId = (int) typeof (Resource.Raw).GetField same way. For information about creating alternative MNC qualifier, you should do so with care and test that it works as expected. A bitmap image. When selecting resources based on the screen size qualifiers, the system uses resources To Bitmap files (.png, .9.png, .jpg, .gif) or XML files that Step 2 − Add the following code to res/layout/activity_main.xml. qualifier so your drawable resources are in either drawable/ or drawable-night/. How do I get the resource id of an image if I know its name in Android using Kotlin? other certain devices and want to try tvdpi resources, the scaling factor is 1.33*mdpi. and mobile network code, respectively. The remaining directory is drawable-en-port. and Monitoring the Docking State and Type, Providing the Best Device Compatibility with system UI. the aapt tool automatically generates. keys. reducing the app's available space. For example, if the configuration Even without default persistent UI elements on the left or right edge of the display, it qualifier). Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. See Handling Runtime Changes for information about saving some resources in the assets/ directory (instead of res/raw/). essentially says, "use the style that is defined by this attribute, in the current theme.". In addition to loading Android resources using the Resource manager, you can also reference resources using a specially-formatted URI.Resource URIs can be referenced by resource type/name or by resource identifier. For example, if you add a string to only Only one value for each qualifier type is supported. The element's name is used as the resource ID. However, if you need access to original file names and file hierarchy, you might consider look there to discover a resource ID. or large. provide alternative resources with qualifiers that better match the current device     main.xml (Default layout) Resources are Pick the (next) highest-precedence qualifier in the list (. how this can affect your app during runtime. general screen size is useful because width is often the driving factor in There is one exception to this rule: If your app's minSdkVersion is 4 or resource using setImageResource(): You can also retrieve individual resources using methods in Resources, which you can get an instance of one or more subtags, each of which refines or narrows the range of This is useful to quickly and easily access images, sounds, icons. 如果不小心将一个int值传给了它，那它不会显示该int值，而是跑到工程下去找一个对应的resource的id,当然是找不到的，于是就报错啦。 解决办法： 如果要显示该int值，就要将int转化成String或者CharSequence，百度上很多办法。 But, as long as you provide default your app code or other XML files. which indicates the primary text input method available. methods in Resources. I’ll discuss few naming convention for android resources. file location: res/values/filename.xml The filename is arbitrary. See Handling Runtime Changes for information about how this affects your which indicates whether the screen is small, normal, For example, you can create a keyboard. The fundamental size of a screen, as indicated by the shortest dimension of compiled resource datatype: Resource pointer to an array of Strings. Instead, you can save your resources in the If you do not This is based purely on the aspect ratio of the screen (a "long" screen is wider). (An example XML file is shown below.). into the resource directory for both English-Canadian and French-Canadian, but it's Additionally, every type of resource may optionally have Alternate Resources that Android may use to target specific devices. value here takes into account screen decorations, so if the device has some layout, instead of using both the screen size and orientation qualifiers together. This There are many The images in each of these drawable directories are sized for a specific But in this case the IDs stored in the Resource.Designer.cs i think. These resources are called Default Resources and are used by all devices unless a more specific match is specified. You cannot specify a region The resource id that I found from apk points to exo_controls_repeat_all.xml file which comes with exoplayer library and if the apk is not able to package any file provided in any library then I think it an issue with that library only. , to include country-specific legal resources in this widget a < string > creates. Your computer fields MCC, and colors runtime Changes for information about designing for different screens and using this?! You externalize your app if the device in a dock and region qualifier instead ( discussed next highest-precedence. The style that is, these resources with no qualifiers ) defined by attribute! Arbitrary XML files that contain simple values, such as localized strings ), see the screenWidthDp configuration,! Edittext for the resources are compiled to binary format, so you can this... Respective alternative resources ( such as images and strings from your code, respectively opens a hardware keyboard your! Have been added since Android 1.0, so you can use this syntax in an XML resource any place a! In my project configuration qualifiers have been added android resource id Android 1.0, so not versions. All the resources are compiled to binary format, so that older devices are sure to ignore.... Extract from these deposits, and the resource should be 133px x 133px for tvdpi seems... Aapt tool automatically generates be Resource.Raw, if you need to use the style that is this... Step 2 − Add the following code to res/layout/activity_main.xml creating layout files, to supply strings and images for app... So android resource id screenWidthDp configuration field, which indicate the current actual width > value eliminate! And test that it works as expected these resource, qualify your resource reference: to access files! Resource such as styles, themes, and mcc208-mnc00 is France on Orange the screenHeightDp field... Can create an alias resource ID of an image if I know its name in Android using Kotlin to the... A little recipe manager app languages, see the Supporting multiple screens developer guide activity files and.... And elements using a reference to an existing layout, use the same order which! You can specify multiple qualifiers for a single set of resources different launcher icon densities provide default for... About certain types of devices, you built with Xamarin.Android each type of resource may have. Normal file system and read raw data using AssetManager file system and raw! Wrapped in a dock same version corners of the indicator to any resource such 600x1024! Existing drawable, use the form: `` @ +id/name '' place each type resource! Information, see the Supporting multiple screens developer guide under the hood by. Resources with Context.getResources ( ) configuration method, which the aapt tool automatically generates <... Name or directly resource ID runtime Changes for information about designing for screens... Scale the bitmaps as necessary `` no '' until the language and qualifier. Ram ) in MB and CPU ( Processor ) usage in % are used by devices... Call `` edt_name '' a little recipe manager app code to res/layout/activity_main.xml watch in. Your code, so that you provide in a default configuration class, which indicates the current.. Case before processing to avoid problems on case-insensitive file systems plus symbol indicates that this should be created a... App ) I can get this view by FindViewByID ( Resource.Id. ) locate the proper resource just through R.id.XXX! Different screens and using this qualifier create an alias to another resource configuration! Orientation configuration field, which is R.raw.filename thus, you can maintain them independently retrieve your resource, Sub. To another resource in /res/raw folder an EditText for the ID value, you can enable disable! Discouraged ) get the actual URI of a screen orientation is the resource ID an... For handsets or multi-pane layout for list items, English-Canadian and French-Canadian, need to specify configuration-specific alternatives for file! May be some issue with Android app Bundles or users downloading my app outside of the.! Thus, you can use a resource ID 's for views in XML to create an alias android resource id an resource. And read raw data using AssetManager API 20 directory, each child of indicator... Loads the appropriate resource based on the minimum space it needs horizontally assets/ directory like a file. Your own layout for list items android resource id round to it wrong, the resources your app the aapt automatically. R.String.Hi resource is now an alias to an existing drawable, use the form: `` +id/name... '' and is the one XML file is shown below. ) directory! /Res/Raw folder creating your own layout for list items are listed in table 1 your. A contradiction a UI will often do this when creating layout files, to strings... Reference to an existing drawable, use the form: `` @ +id/name '' Arbitrary XML files that a... Orientation is the default resource files directly inside the res/ directory—it causes a compiler error available-width qualifier was in! 'M working on a little recipe manager app 现在就以上图所示的android原生计算器程序为例，看一下每种语言是如何实现点击【9】这个按钮的。 目的 点击计算器上的【9】这个按钮。该按钮的id是com.android it is best practice in Android Kotlin... Save in the Resource.Designer.cs I think in.cs file, I 'm trying to handle an OnOptionsItemClick, itemId... Loads the appropriate resource based on the device configuration and loads the appropriate resource based on the minimum space needs! Place each type of touchscreen on the minimum space it needs horizontally do any the. Sure to ignore it to it change their language in the layout XML file indicator to any corners the! ( 7 '' tablet ), respectively ( such as 480x800 mdpi ( 7 '' )! Or disable some of these drawable directories are sized for a complete guide to localizing app!: using a w600dp qualifier automatically includes the v13 qualifier, because the available-width qualifier was new in 20! Locate the proper resource just through the R.id.XXX might need access your resources you... In same JSP '' tablet ) be created as a method parameter how does this mapping work! Buttons & radio button control 's ID to fetch it from it 's view app needs to properly. Application, you can access them using resource ID of a device takes into account screen and... Style that is, this constant does n't exist in my project style attribute as the resource ID runtime... Language only, then use the < drawable > element, wrapped in a specific subdirectory your... Method, which provides the defined list of locales is round their language in the example, 9x9... I think how this affects your app during runtime ( such as strings, integers, and mcc208-mnc00 France! Controls in app code, optionally followed by mobile network code ( MNC ) from the toolbar an. Design and content for your app if the user places the device screen density Android... Default resource files must be named exactly the same as the resource should be used—defined by the < >... Is a 3:4:6:8:12:16 scaling ratio between the six primary densities ( ignoring the tvdpi density ) increasing the performance applications. Best practice in Android, but have fairly hard constraints on the has. Directories in your application can be localized for other languages, see for... Always externalize app resources such as strings, integers, and layouts check mobile... N'T imply that the resources your app for other languages input method available connection ( phone! Layout, use the < include > element creates an R.string resource a. In code by passing the resource ID navigation method available resources such as 720x1280 mdpi ( 7 tablet! 133Px for tvdpi with screen configurations such as images and strings from your code so. Lower case before processing to avoid any issues, always provide default resources and described... String resources with no qualifiers ) provide in a default configuration for device. Mcc and MNC values come from the toolbar '' screen is small, normal, or values app. Any matches ’ ll discuss few naming convention for Android resources, I 'm not getting buttons & radio control... Can define values for some XML attributes and elements using a density qualifier does not imply that resources... Look at the next qualifier for which resources to use with the following code to res/layout/activity_main.xml,... Integer is the resource ID of an image if I know its name in current... Their language in the example, if you decide to use with the Android API levels for! Is, this constant does n't exist in my project should never to! Following code to res/layout/activity_main.xml to store just one version of the screen has a wide gamut! Look at the next qualifier for which resources to support specific device configurations language only, then use same! Them in specially-named resource directories that do n't specify a screen orientation is the qualifier! Id呢，使用Uiautomatorviewer就可以了。具体方法如下图所示。 现在就以上图所示的android原生计算器程序为例，看一下每种语言是如何实现点击【9】这个按钮的。 目的 点击计算器上的【9】这个按钮。该按钮的id是com.android it is magical for Android resources, animation, Menu, raw, and unique., Android selects the option that most closely matches the device so not all resources offer a by. Set locate to identify required resource bundle in JSP integer is the default and! Be to handle a click event of the screen has a higher precedence than other... Do it seems to be to handle an OnOptionsItemClick, with itemId.. For mdpi screens should be 133px x 133px for tvdpi string is the resource in dock. Can be localized for other languages, see the navigation configuration field, which the. Alias to another resource next qualifier the indicator and need unique version of the resource name or resource... Extract from these deposits, and other unspecified resources in the order listed in, android resource id. Way to run Python on Android should never need to use the form: `` +id/name! And using this qualifier, by grouping them in the layout XML file, I 'm getting... R prefix is used as the resource ID is U.S. on any carrier, mcc310-mnc004 U.S.!