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For example, the adb shell setprop foo 'a b' command is now an error because the single quotes ' are swallowed by the local shell, and the device sees adb shell setprop foo a b. To make the command work, quote twice, once for the local shell and once for the remote shell, the same as you do with ssh 1. For example, adb shell setprop foo "'a b'". Android provides most of the usual Unix command-line tools. For a list of available tools, use the following command:. Help is available for most of the commands via the --help argument.

Many of the shell commands are provided by toybox. General help applicable to all toybox commands is available via toybox --help. See also Logcat Command-Line Tool which is useful for monitoring the system log. Within an adb shell, you can issue commands with the activity manager am tool to perform various system actions, such as start an activity, force-stop a process, broadcast an intent, modify the device screen properties, and more.

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. 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. Accessibility volume. Accessibility services can optimize the audio experience for users with disabilities.

To work around this issue, you can delete some non-essential dynamic partitions, such as the product partition, and flash the GSI again. For more information, see the flashing GSIs documentation. Content and code samples on this page are subject to the licenses described in the Content License. Platform Architecture Generic System Image.

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