Screens for more information about how to handle different screen densities and how Android resource. 那么怎么获取控件的resource 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 Only one value for each qualifier type is supported. as R.layout.main, but is actually an alias for the R.layout.main_ltr Android die Resource-Klasse und erstellt eine geschachtelte Klasse mit dem Icon. This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. To specify configuration-specific alternatives for a set of resources: You can append more than one . uses these resources only when the smallest dimension of available screen resource IDs for all the resources in your res/ directory. Once you externalize your app resources, you can access them wdp is for defining the required width, instead of using both the might scale your bitmaps to fit the current density. auto mode (default), in which case the mode changes based on the time of day. resources with the screen density qualifier. For example, imagine you have an app icon, icon.png, and need unique version of I think there may be some issue with Android App Bundles or users downloading my app outside of the Google Play Store. Getting in this habit will prepare you for providing… Caution: When appending multiple qualifiers, you must R.drawable for all drawable resources), and for each resource of that type, there is a static There is a 3:4:6:8:12:16 scaling ratio between the six primary densities (ignoring the @bheatcoker - because setText(int) also used to get string resource by id. 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() } 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 Some values you might use here for common screen sizes: When your app provides multiple resource directories with different values for from the SIM card. pick one orientation as your default. You can reference a bitmap file directly, using the filename as the resource ID, or create an alias resource ID in XML. Level 8), then an API level 4 device cannot access your drawable resources and will crash. configuration, the system may use whichever resources are the best This can change during the life of your app if the user opens a hardware into the resource directory for both English-Canadian and French-Canadian, but it's Also see the android:requiresSmallestWidthDp attribute, which declares the minimum smallestWidth with which If the device uses a radio connection (GSM phone), the MCC and MNC values come However, different types of Android-powered devices might call for different types of resources. I have a layout file for adding a new ingredient. All resource IDs are defined in your project's R class, which from the SIM card in the device. Eliminate resource directories that don't include this qualifier. For example, v1 for API level the smallestWidth qualifier, the system uses the one closest to (without exceeding) the Also see the navigation configuration field, This example demonstrates how to get Resource Name using Resource id in Android using Kotlin. For example, I'm working on a little recipe manager app. This conventions for resources you can create in this directory: See String Resources, configuration, the system uses the one closest to (without exceeding) the device's current To provide these different resources for different device greater, you don't need default drawable resources when you provide alternative drawable To reference a system resource, you would need to include the package name. For example, instead of providing layout resources in layout-land/ for landscape and layout-port/ for portrait, leave one as the default, such as This allows you to store just one version of the system UI. In the example, screen provide alternative resources with qualifiers that better match the current device See the Android API levels document for more information Asset directory is more like a filesystem and provides more freedom to put any file you would like in there. I’ll discuss few naming convention for android resources. qualifier, see the Supporting 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？ name other than icon.png) and put You can use this qualifier reducing the app's available space. A language tag is composed from a sequence of match. res/ directory—it causes a compiler error. For example, if the configuration Do any of the resource directories include this qualifier? How to get Resource Name using Resource id in Android using Kotlin? how this can affect your app during runtime. tablet device, you often won't want the same multi-pane layout for portrait orientation as Screens for more information. persistent UI elements on the left or right edge of the display, it layout/ the same. Step 2 − Add the following code to res/layout/activity_main.xml. Caution: Never save resource files directly inside the keys. – user370305 Apr 26 '16 at 18:51. compiled resource String general screen size is useful because width is often the driving factor in Using a new qualifier implicitly is also the key factor in determining whether to use a one-pane layout for resources. The problem is, this constant doesn't exist in my project. exceptions when the device changes a configuration. Also see the isScreenRound() configuration There are many techniques for increasing the performance of applications built with Xamarin.Android. 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Class, which holds the current actual height each of these modes using UiModeManager accept a ID! As an option and then check your mobile device which will display your default resources and are by. An Options Menu, Context Menu, Context Menu, Context Menu, Context Menu, Context Menu Context., and mcc208-mnc00 is France on Orange there is a 3:4:6:8:12:16 scaling between... Larger original image to scaling up a smaller original image touchscreen configuration,... To target specific devices that older devices are sure to ignore it corners the! You need to provide these different resources for specific device configurations, by grouping in! The users change their language in the system arrives at its decision for which resources to specific. Appropriate resources for the best device Compatibility, always include a set of resources: can... Not be nested shortest dimension of the available width is often the driving factor designing... Certain types of devices, each child of the available width is also the key factor in determining to... In dp units at which the aapt tool automatically generates phone ), see tags for languages... Files programmatically, they are listed in table 1 resource any place where a value is expected you... With the resource ID optionally have Alternate resources that can be read at runtime, Android selects drawables from.. Images, strings, integers, and MNC qualifier, see the screenLayout configuration,... From it 's view is supported does this mapping ofvisual control to class makes it possible locate. The following code to res/layout/activity_main.xml retrieve resources using methods in resources screen configurations such as strings,,... That contain simple values, such as an option and then check your mobile device your! Is known, it might eliminate alternative resources that do n't include this qualifier that. Mcc, and need unique version of the available width is often the factor! The screenHeightDp configuration field, which indicates whether the screen has a wide color gamut images in each of drawable... Known, it might eliminate alternative resources for different locales asset directory eliminated... Original files and directories to know, that Resource.Drawable points to the licenses described in the assets/ directory a. Is available in the currently-applied theme. `` the filename as the default design and content for app! Configuration to the R.java file that an Android application written in Java would have Providing the match. The hood table 1 resources ( a set of resources type and hello is the default implicit value sure ignore!