Android developer kit download

Options: -f : List the APK file for the test package. Options: -r : Reinstall an existing app, keeping its data. This feature is only supported on certain devices. This option forces adb to use the feature or fail if it is not supported with verbose information on why it failed. Options: -k : Keep the data and cache directories around after package removal. On devices running Android 6. On devices running Android 5. Location values: 0 : Auto: Let system decide the best location.

Note: This is only intended for debugging; using this can cause apps to break and other undesireable behavior. To help you develop and test your device management or other enterprise apps, you can issue commands to the device policy manager dpm tool. Use the tool to control the active admin app or change a policy's status data on the device.

You can also issue a device policy manager command directly from adb without entering a remote shell:. You can also pass --user current to select the current user. The app must declare android:testOnly in the manifest. This command also removes device and profile owners. This is useful to avoid the device's scheduling restrictions when developing apps that manage freeze-periods.

See Manage system updates. Supported on devices running Android 9. This command is rate-limited. The screencap command is a shell utility for taking a screenshot of a device display.

The utility records screen activity to an MPEG-4 file. You can use this file to create promotional or training videos or for debugging and testing. To begin recording your device screen, run the screenrecord command to record the video. Then, run the pull command to download the video from the device to the host computer. The utility records at the native display resolution and orientation by default, with a maximum length of three minutes.

Table 5. Starting in Android 7. You might want to examine the collected profiles to understand which methods are determined to be frequently executed and which classes are used during app startup.

If you test your app across multiple test devices, it may be useful to reset your device between tests, for example, to remove user data and reset the test environment. You can perform a factory reset of a test device running Android 10 API level 29 or higher using the testharness adb shell command, as shown below.

When restoring the device using testharness , the device automatically backs up the RSA key that allows debugging through the current workstation in a persistent location.

That is, after the device is reset, the workstation can continue to debug and issue adb commands to the device without manually registering a new key. Additionally, to help make it easier and more secure to keep testing your app, using the testharness to restore a device also changes the following device settings:. If you app needs to detect and adapt to the default settings of the testharness command, you can use the ActivityManager.

It includes commands such as. You can also execute SQLite commands from the command line, as shown below. For more information, see the sqlite3 command line documentation. Content and code samples on this page are subject to the licenses described in the Content License. Android Studio. Download What's new User guide Preview. Meet Android Studio. Manage your project. Write your app. Build and run your app. Run apps on the emulator. Run apps on a hardware device. Configure your build. Optimize your build speed.

Debug your app. Test your app. Profile your app. Android Studio profilers. Profile CPU activity. Benchmark your app. Measure performance. Publish your app. Command line tools. Android Developers. It is a client-server program that includes three components: A client , which sends commands. The client runs on your development machine.

You can invoke a client from a command-line terminal by issuing an adb command. A daemon adbd , which runs commands on a device. The daemon runs as a background process on each device. A server , which manages communication between the client and the daemon. The server runs as a background process on your development machine. How adb works When you start an adb client, the client first checks whether there is an adb server process already running.

For example: Emulator 1, console: Emulator 1, adb: Emulator 2, console: Emulator 2, adb: and so on Enable adb debugging on your device To use adb with a device connected over USB, you must enable USB debugging in the device system settings, under Developer options. On some devices, the Developer options screen might be located or named differently. To connect to your device, follow these steps: Figure 1.

Wireless ADB pairing dialog. Figure 2. We recommend using this method rather than getFrameAtTime which can waste memory because it returns a bitmap with the same resolution as the source video. For example, a frame from a 4K video would be a 16MB bitmap, far larger than you would need for a thumbnail image. This class allows you to create, map, and manage an anonymous SharedMemory instance. ASharedMemory gives access to a file descriptor, which can then be mapped to read and write.

It's a great way to share large amounts of data between apps or between multiple processes within a single app. You do this by creating a WallpaperColors object from a bitmap, a drawable, or by using three manually-selected colors. You can also retrieve this color information. To create a WallpaperColors object, do either of the following:.

To retrieve the primary, secondary, or tertiary color details from the wallpaper, call the following methods:. To notify the system about any significant color changes in your live wallpaper, call the notifyColorsChanged method. This method triggers an onComputeColors lifecycle event where you have an opportunity to provide a new WallpaperColors object. To add a listener for color changes, you can call the addOnColorsChangedListener method. You can also call the getWallpaperColors method to retrieve the primary colors of a wallpaper.

The FingerprintManager class has introduced the following error codes:. Content and code samples on this page are subject to the licenses described in the Content License. All Android releases Android 9. Features and APIs. Behavior changes. Android Developers. More granular and consistent control over which notifications can appear and how intrusive they are. The biggest change to the foundations of Android to date: a modular architecture that makes it easier and faster for hardware makers to deliver Android updates.

Developers can now let the size of their text expand or contract automatically based on the size and characteristics of the TextView, making it much easier to optimize the text size on different screens or with dynamic content.

Learn more. Explore these carousel items. Use the previous and next buttons, as well as the keyboard arrows, to change the displayed item. Asset 1. Open Wonder Android 8. Smart text selection: Android Oreo recognizes text when you tap or select, then recommends a next logical step via a suggested app. Do two things at once, at once Picture-in-Picture: Allows you to see two apps at once, it's like having super strength and laser vision.

Dive into more apps with fewer taps Notification Dots: Press the notification dots to quickly see what's new, and easily clear them by swiping away. Android Instant Apps: Teleport directly into new apps right from your browser, no installation needed. Evolving our superest of powers safely and soundly. Peace of mind in the palm of your hand Google Play Protect: Working to keep your device and data safe from misbehaving apps by scanning over 50 billion apps per day, even the ones you haven't installed yet!

Talk about a life saver Whether you're talking, playing, working or streaming, you can feel confident about keeping your battery strong and full of life. Express yourself in more ways than ever Emoji: Share the feels with a fully redesigned emoji set, including over 60 new emoji. A bird? A plane? No, it's Android Oreo. Powers, and beyond Accessibility button.