Before you create an Android emulator, you need to install an Android system image that your emulators can use. Note: If you installed the Android SDK and NDK during RAD Studio installation, a valid Android system image (such as Android 4.2.2 API 17) should already be shown as Installed in the Android SDK Manager. In this case, you do not need. An Android Virtual Device (AVD) is a configuration that defines the characteristics of an Android phone, tablet, Wear OS, Android TV, or Automotive OS device that you want to simulate in the Android Emulator.The AVD Manager is an interface you can launch from Android Studio that. Caution: Flashing a new system image deletes all user data. Be certain to first backup any personal data such as photos. To flash a system image: Download the appropriate system image for your device below, then unzip it to a safe directory. Connect your device to your computer over USB. Apr 09, 2016 In this video I am going to show you how to: How to add an image or picture to your android studio app. Either by using xml or java. Link to corresponding Android.
- How To Download System Image For Android Studio Windows 10
- Android Studio Setup Download
- Download Android Studio Kit
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A Generic System Image (GSI) is a pure Android implementation with unmodified Android Open Source Project (AOSP) code, runnable on a variety of Android devices.
Figure 1. GSI support across devices.
Starting with Android 9 (API level 28), Generic System Images (GSIs) are available to app developers throughout the full Android release cycle. You, as an app developer, can install and run the latest Android GSIs on a variety of existing Android devices, and in different Android OS release stages including Preview and Beta phases, to perform app testing! In this way, your app gets broader test coverage, starting at an much earlier time than before:
- More test coverage on real devices
- More time to fix app compatibility issues
- More opportunities to fix non-compatible issues in Android OS reported by app developers
Note: You would install a later GSI version than the version of Android currently installed on a device.
The GSI project helps improve the Android ecosystem by providing more ways to improve app and OS quality before the next release of the OS. The project is also open-sourced.
GSI includes core system functionalities in all devices running Android 9 and above; in other words, GSI does not include device manufacturers's customizations. You might encounter behavioral differences in the following situations:
- Interactions that involve the UI.
- Workflows that request newer hardware features.
Check device compliance
GSI works only on devices with the following characteristics:
- Bootloader is unlocked.
- Fully Treble-compliant.
- Launched with Android 9 (API level 28) or higher. Devices upgraded to Android 9 from an earlier version may or may not support GSI.
Warning: Attempting to flash GSI to a non-compliant device couldresult in your device becoming non-bootable. Always confirm that your device is compliant before flashing, and follow the installation steps provided by your device's manufacturer. GSI doesn't support rollback. You will need a recovery method and original system ROM to revert to the original system.
To determine whether your device can use GSI and which GSI OS version you should install, do the following:
- Check for Treble support by running the following command:If the response is
false
, the device isn't compatible with GSI and you shouldn't continue. If the response istrue
, continue to the next step. - Check for cross-version support by running the following command:Note: Depending on your platform, the configuration file in the preceding command may or may not have a version identifier in it.In the output, look in the section
[vendor]
fornamespace.default.isolated
.If the value for that attribute istrue
, then the device fully supports Vendor Native Development Kit (VNDK) and can use any GSI operating system (OS) version newer than the on device OS version. Choose the latest GSI OS version available.If the value for the attribute isfalse
, then the device isn't fully VNDK-compliant, and the device can use only the GSI for the same on-device OS version. For example, an Android 9 (API version 28) device that isn't VNDK-compliant can load only an Android 9 GSI image. - The GSI CPU architecture type must match the device’s CPU architecture. To find the right CPU architecture for the GSI image, run the following command:Use the output to determine which GSI image to use when flashing your device. For example, on a Pixel 3, the output would indicate that the CPU architecture is
arm64-v8a
, so you would use thearm64
type of GSI.
Download GSI images
These versions of GSIs here are not to be used by OEMs to run and submit compliance tests. OEMs should continue to refer to their existing communication channels, such as their Technical Account Managers for compliance test related activities.
There are a few ways to get GSIs, depending on your development needs:
- For Android 10 GSI images, download from the GSI release page.
- For Android 9 GSI source code, download from AOSP and build your GSI images.
- For pre-built GSI images without GMS applications, download from the AOSP CI site.
Install GSI images
Note: If your device has adopted Android Verified Boot (AVB), download and flash the following image to disable AVB before flashing a GSI: vbmeta.img
Installing GSI is device-dependent. Refer to your device's manufacturer for the exact tools and procedures. For Pixel 3 and newer devices, there are several ways to install:
Give us your feedback
GSI images help to validate apps on Android. We appreciate your feedback on the images, the tools, and the process of enabling GSI on your devices.
To notify us of bugs or feature requests, use the dedicated issue tracker component.
Additional resources
Adding images to an Android app is simple: Drag them from the folder where they’re stored to the src/main/res/drawable-xxhdpi folder, as shown in the following figure.
For the Silent Mode Toggle application, you need two ringer images: off and on. Be sure to put both images in the src/main/res/drawable-xxhdpi folder.
When you drag images into Android Studio, it regenerates the build/generated folder, and the R.java file is updated to include a reference to the two new images you added.
You can use the references to these resources to add images to your layout in code or in XML definition. You declare them in the XML layout.
![How To Download System Image For Android Studio How To Download System Image For Android Studio](/uploads/1/2/6/0/126067066/824029204.png)
To add an image to the layout, type the following into the activity_main.xml file, overwriting the current content of the file:
This code adds the ImageView inside the FrameLayout. An ImageView allows you to project an image to the screen on the device.
Setting image properties
Your ImageView contains a few new parameter attributes:
- The android:id=”@+id/phone_icon” property: The id attribute defines the unique identifier for the view in the Android system.
- The layout_width and layout_height properties: You used layout_width and layout_height in your FrameLayout, but there you set them to match_parent. For the ImageView, you want the ImageView’s size to be the same as the image it’s showing, so set it to have a layout_width and layout_height of wrap_content to “wrap” the content inside the view. If you had set the height and width to be match_parent, Android would have scaled the image up much too large to take up the full screen. Try it!
- The layout_gravity property: This property defines how to place the view (both its x– and y-axes) with its parent. In this example, the value is defined as the center constant. Since the ImageView is smaller than the FrameLayout, using layout_gravity=center instructs the Android system to place the ImageView in the center of the FrameLayout rather than in the default location of the upper left. You can use many other constants, such as center_vertical, center_horizontal, top, bottom, left, right, and many more. See the FrameLayout.LayoutParams Android documentation for a full list.
- The android:src=”@drawable/ringer_on” property: You use this property to set the image that you want to show up on the screen.
Notice the value of the src property — “@drawable/ringer_on”. You can reference drawable resources via XML by typing the “at” symbol (@) and the type and id of the resource you want.
Certain Android attributes begin with the layout_ prefix — android: layout_width, android:layout_height, and android:layout_ gravity are all examples. The layout_ convention tells you that the attribute relates to the view’s parent. Attributes that don’t begin with layout_ pertain to the view itself. So the ImageView’s android:src attribute tells the ImageView which image to use, but its android:layout_gravity tells the ImageView’s parent (the FrameLayout, in this case) to lay out the ImageView in the center of the parent.
Setting drawable resources
In your ImageView, you set your image src to @drawable/ringer_on. You don’t type @drawable-xxhdpi/ringer_on for the drawable resource identifier, because it’s Android’s job (not yours) to figure out the correct size image for the current device’s screen. At runtime, Android determines which density is correct for that device, and loads the closest matching drawables.
How To Download System Image For Android Studio Windows 10
For example, if the app is running on a medium-density device and the requested drawable resource is available in the drawable-mdpi folder, Android uses that resource. Otherwise, it uses the closest match it can find. Support for various screen sizes and densities is a broad topic (and can be complex!).
Android Studio Setup Download
The ringer_on portion of the identifier identifies the drawable you want to use. The image filename is ringer_on.png. If you were to open the R.java file in the build/generated folder, you would see a static field with the name phone_on.
Download Android Studio Kit
You can use code completion to see the available resources in Android Studio. Place the cursor directly after @drawable/ in the src property of the ImageView in the Android Studio editor, and press Ctrl+spacebar. The code-completion window opens, as shown. The other resource names in the window are other options you could choose for the src portion of the drawable definition.