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While in a shell, the syntax is:. You can also issue an activity manager command directly from adb without entering a remote shell. See the Specification for intent arguments. Options are: -D : Enable debugging. Prior to each repeat, the top activity will be finished. This command kills only processes that are safe to kill and that will not impact the user experience.

Use with [-e perf true] to generate raw output for performance measurements. Required for test runners. Options are: -w : Wait for debugger when app starts. This command is helpful for testing your app across different screen sizes by mimicking a small screen resolution using a device with a large screen, and vice versa.

Example: am display-size x display-density dpi Override device display density. This command is helpful for testing your app across different screen densities on high-density screen environment using a low density screen, and vice versa. Example: am display-density to-uri intent Print the given intent specification as a URI.

Specification for intent arguments For activity manager commands that take an intent argument, you can specify the intent with the following options:. Within an adb shell, you can issue commands with the package manager pm tool to perform actions and queries on app packages installed on the device. You can also issue a package manager command directly from adb without entering a remote shell.

Options: -f : See their associated file. Options: -g : Organize by group. 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. Wireless adb IP and port number. Start an Activity specified by intent. Start the Service specified by intent. Force stop everything associated with package the app's package name. Kill all processes associated with package the app's package name.

Issue a broadcast intent. Start monitoring with an Instrumentation instance. Start profiler on process , write results to file. Dump the heap of process , write to file. Set app package to debug. Clear the package previous set for debugging with set-debug-app. Start monitoring for crashes or ANRs. Control screen compatibility mode of package. Override device display size. Example: am display-size x Override device display density.

Example: am display-density Print the given intent specification as a URI. Print the given intent specification as an intent: URI. If you see errors mentioning missing DLLs, you may need to manually fetch and install the runtime package. Upon disconnection, adb will attempt to reconnect for up to 60 seconds before abandoning a connection.

Fix Unicode console output on Windows. Thanks to external contributor Spencer Low! Fix a file descriptor double-close that can occur, resulting in connections being closed when an adb connect happens simultaneously. Fix adb forward --list when used with more than one device connected. Sort output of adb devices by connection type and device serial. Increase the socket listen backlog to allow for more simulataneous adb commands.

Improve error output for adb connect. Clean up help output. Add product. Avoid bricking new devices when using a too-old version of fastboot by allowing factory image packages to require support for specific partitions.

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