Android Debug: Using Hardware Devices

When building a mobile application, it's important that you always test your application on a real device before releasing it to users. This page describes how to set up your development environment and Android-powered device for testing and debugging on the device.

You can use any Android-powered device as an environment for running, debugging, and testing your applications. The tools included in the SDK make it easy to install and run your application on the device each time you compile. You can install your application on the device directly from Eclipse or from the command line with ADB. If you don't yet have a device, check with the service providers in your area to determine which Android-powered devices are available.

If you want a SIM-unlocked phone, then you might consider the Google Nexus S. To find a place to purchase the Nexus S and other Android-powered devices, visit google.com/phone.

Note: When developing on a device, keep in mind that you should still use the Android emulator to test your application on configurations that are not equivalent to those of your real device. Although the emulator does not allow you to test every device feature (such as the accelerometer), it does allow you to verify that your application functions properly on different versions of the Android platform, in different screen sizes and orientations, and more.

Setting up a Device for Development

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With an Android-powered device, you can develop and debug your Android applications just as you would on the emulator. Before you can start, there are just a few things to do:

1. Declare your application as "debuggable" in your Android Manifest.

   When using Eclipse, you can skip this step, because running your app directly from the Eclipse IDE automatically enables debugging.

   In the AndroidManifest.xml file, add android:debuggable="true" to the <application> element.

   Note: If you manually enable debugging in the manifest file, be sure to disable it before you build for release (your published application should usually not be debuggable).

2. Enable USB debugging on your device.
   • On most devices running Android 3.2 or older, you can find the option under Settings > Applications > Development.
   • On Android 4.0 and newer, it's in Settings > Developer options.

     Note: On Android 4.2 and newer, Developer options is hidden by default. To make it available, go to Settings > About phone and tap Build number seven times. Return to the previous screen to find Developer options.

3. Set up your system to detect your device.
   • If you're developing on Windows, you need to install a USB driver for adb. For an installation guide and links to OEM drivers, see the OEM USB Drivers document.
   • If you're developing on Mac OS X, it just works. Skip this step.
   • If you're developing on Ubuntu Linux, you need to add a udev rules file that contains a USB configuration for each type of device you want to use for development. In the rules file, each device manufacturer is identified by a unique vendor ID, as specified by the ATTR{idVendor} property. For a list of vendor IDs, see USB Vendor IDs, below. To set up device detection on Ubuntu Linux:
     1. Log in as root and create this file: /etc/udev/rules.d/51-android.rules.

        Use this format to add each vendor to the file:
        SUBSYSTEM=="usb", ATTR{idVendor}=="0bb4", MODE="0666", GROUP="plugdev" 
        
        In this example, the vendor ID is for HTC. The MODE assignment specifies read/write permissions, and GROUP defines which Unix group owns the device node.

        Note: The rule syntax may vary slightly depending on your environment. Consult the udevdocumentation for your system as needed. For an overview of rule syntax, see this guide towriting udev rules.

     2. Now execute:
        chmod a+r /etc/udev/rules.d/51-android.rules

Note: When you connect a device running Android 4.2.2 or higher to your computer, the system shows a dialog asking whether to accept an RSA key that allows debugging through this computer. This security mechanism protects user devices because it ensures that USB debugging and other adb commands cannot be executed unless you're able to unlock the device and acknowledge the dialog. This requires that you have adb version 1.0.31 (available with SDK Platform-tools r16.0.1 and higher) in order to debug on a device running Android 4.2.2 or higher.

When plugged in over USB, you can verify that your device is connected by executing adb devices from your SDK platform-tools/ directory. If connected, you'll see the device name listed as a "device."

If using Eclipse, run or debug your application as usual. You will be presented with a Device Chooserdialog that lists the available emulator(s) and connected device(s). Select the device upon which you want to install and run the application.

If using the Android Debug Bridge (adb), you can issue commands with the -d flag to target your connected device.

USB Vendor IDs

This table provides a reference to the vendor IDs needed in order to add USB device support on Linux. The USB Vendor ID is the value given to the ATTR{idVendor} property in the rules file, as described above.

Company	USB Vendor ID
Acer	0502
ASUS	0b05
Dell	413c
Foxconn	0489
Fujitsu	04c5
Fujitsu Toshiba	04c5
Garmin-Asus	091e
Google	18d1
Hisense	109b
HTC	0bb4
Huawei	12d1
K-Touch	24e3
KT Tech	2116
Kyocera	0482
Lenovo	17ef
LG	1004
Motorola	22b8
MTK	0e8d
NEC	0409
Nook	2080
Nvidia	0955
OTGV	2257
Pantech	10a9
Pegatron	1d4d
Philips	0471
PMC-Sierra	04da
Qualcomm	05c6
SK Telesys	1f53
Samsung	04e8
Sharp	04dd
Sony	054c
Sony Ericsson	0fce
Teleepoch	2340
Toshiba	0930
ZTE	19d2