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In this document
- Creating AVDs
See also
The android
tool lets you manage AVDs on the command line. For a complete reference of the command line options that you can use, see the reference for the android
tool.
Listing Targets
To generate a list of system image targets, use this command:
The android
tool scans the <sdk>/platforms/
and<sdk>/add-ons/
directories looking for valid system images andthen generates the list of targets. Here's an example of the command output:
Creating AVDs
In addition to creating AVDs with the AVD Manager user interface,you can also create them by passing in command line arguments to the android
tool.
Open a terminal window and change tothe <sdk>/tools/
directory, if needed.
To create each AVD, you issue the command android create avd
,with options that specify a name for the new AVD and the system image you wantto run on the emulator when the AVD is invoked. You can specify other options onthe command line also, such as the emulated SD card size, the emulator skin, or a customlocation for the user data files.
Here's the command-line usage for creating an AVD:
You can use any name you want for the AVD, but since you are likely to becreating multiple AVDs, you should choose a name that lets you recognize thegeneral characteristics offered by the AVD. The target ID is an integer assigned by theandroid
tool. The target ID is not derived from the system image name, version, or API Level, or other attribute, so you need to run the android list targets
command to list the target ID of each system image. You should do this before you runthe android create avd
command. See the androidtool documentation for more information on the command line options.
When you've selected the target you want to use and made a note of its ID,use the android create avd
command to create the AVD, supplying thetarget ID as the -t
argument. Here's an example that creates anAVD with name 'my_android1.5' and target ID '2' (the standard Android 1.5 system image in the list above):
If the target you selected was a standard Android system image ('Type:platform'), the android
tool next asks you whether you want tocreate a custom hardware profile.
If you want to set custom hardware emulation options for the AVD, enter'yes' and set values as needed. If you want to use the default hardwareemulation options for the AVD, just press the return key (the default is 'no').The android
tool creates the AVD with name and system image mapping yourequested, with the options you specified. For more information, see Setting Hardware Emulation Options.
Note: If you are creating an AVD whose target is an SDK add-on, theandroid
tool does not allow you to set hardware emulation options.It assumes that the provider of the add-on has set emulation optionsappropriately for the device that the add-on is modeling, and so prevents youfrom resetting the options.
Customize the device resolution or density
When testing your application, we recommend that you test your application in several differentAVDs, using different screen configurations (different combinations of size and density). Inaddition, you should set up the AVDs to run at a physical size that closely matches an actualdevice.
To set up your AVDs for a specific resolution or density, follow these steps:
- Use the
create avd
command to create a new AVD, specifyingthe--skin
option with a value that references either a defaultskin name (such as 'WVGA800') or a custom skin resolution (such as 240x432).Here's an example: - To specify a custom density for the skin, answer 'yes' when asked whetheryou want to create a custom hardware profile for the new AVD.
- Continue through the various profile settings until the tool asks you tospecify 'Abstracted LCD density' (hw.lcd.density). Enter an appropriatevalue, such as '120' for a low-density screen, '160' for a medium density screen,or '240' for a high-density screen.
- Set any other hardware options and complete the AVD creation.
In the example above (WVGA medium density), the new AVD will emulate a 5.8'WVGA screen.
As an alternative to adjusting the emulator skin configuration, you can usethe emulator skin's default density and add the -dpi-device
optionto the emulator command line whenstarting the AVD. For example:
Default location of AVD files
When you create an AVD, the android
tool creates a dedicated directory for iton your development computer. The directory contains the AVD configuration file,the user data image and SD card image (if available), and any other filesassociated with the device. Note that the directory does not contain a systemimage — instead, the AVD configuration file contains a mapping to thesystem image, which it loads when the AVD is launched.
The android
tool also creates an <AVD_name>.ini
file for the AVD at theroot of the .android/avd/
directory on your computer. The file specifies thelocation of the AVD directory and always remains at the root the .android directory.
By default, the android
tool creates the AVD directory inside~/.android/avd/
(on Linux/Mac), C:Documents andSettings<user>.android
on Windows XP, and C:Users<user>.android
on Windows 7 and Vista. If you want to use a custom location for the AVD directory, you can do so by using the -p <path>
option when you create the AVD:
If the .android directory is hosted on a network drive, we recommend usingthe -p
option to place the AVD directory in another location. The AVD's .ini file remains in the .android directory on the networkdrive, regardless of the location of the AVD directory.
Setting hardware emulation options
When you are creating a new AVD that uses a standard Android system image ('Type:platform'), the android
tool lets you set hardware emulationoptions for virtual device. The table below lists the options available and thedefault values, as well as the names of properties that store the emulatedhardware options in the AVD's configuration file (the config.ini file in theAVD's local directory).
Table 1. Available hardware profile options for AVDs andthe default values
Characteristic | Description | Property |
---|---|---|
Device ram size | The amount of physical RAM on the device, in megabytes. Default value is '96'. | hw.ramSize |
Touch-screen support | Whether there is a touch screen or not on the device. Default value is 'yes'. | hw.touchScreen |
Trackball support | Whether there is a trackball on the device. Default value is 'yes'. | hw.trackBall |
Keyboard support | Whether the device has a QWERTY keyboard. Default value is 'yes'. | hw.keyboard |
DPad support | Whether the device has DPad keys. Default value is 'yes'. | hw.dPad |
GSM modem support | Whether there is a GSM modem in the device. Default value is 'yes'. | hw.gsmModem |
Camera support | Whether the device has a camera. Default value is 'no'. | hw.camera |
Maximum horizontal camera pixels | Default value is '640'. | hw.camera.maxHorizontalPixels |
Maximum vertical camera pixels | Default value is '480'. | hw.camera.maxVerticalPixels |
GPS support | Whether there is a GPS in the device. Default value is 'yes'. | hw.gps |
Battery support | Whether the device can run on a battery. Default value is 'yes'. | hw.battery |
Accelerometer | Whether there is an accelerometer in the device. Default value is 'yes'. | hw.accelerometer |
Audio recording support | Whether the device can record audio. Default value is 'yes'. | hw.audioInput |
Audio playback support | Whether the device can play audio. Default value is 'yes'. | hw.audioOutput |
SD Card support | Whether the device supports insertion/removal of virtual SD Cards. Default value is 'yes'. | hw.sdCard |
Cache partition support | Whether we use a /cache partition on the device. Default value is 'yes'. | disk.cachePartition |
Cache partition size | Default value is '66MB'. | disk.cachePartition.size |
Abstracted LCD density | Sets the generalized density characteristic used by the AVD's screen. Default value is '160'. | hw.lcd.density |
Trackball support | Whether there is a trackball present. | hw.trackBall |
Moving an AVD
If you want to move or rename an AVD, you can do so using this command:
Updating an AVD
If, for any reason, the platform/add-on root folder has its name changed (maybe because the user has installed an update of the platform/add-on) then the AVD will not be able to load the system image that it is mapped to. In this case, the android list targets
command will produce this output:
To fix this error, use the android update avd
command to recompute the path to the system images.
Deleting an AVD
You can use the android
tool to delete an AVD. Here is the command usage:
When you issue the command, the android
tool looks for an AVD matching the specified name deletes the AVD's directory and files.
In the AVD Manager gui I see a list of Device Definitions, these make it easy to provision a device with given settings.
When I use android list targets
I get a different set of results from the device definitions.
Is the list of device definitions accessible through the command line? If so, how can I build a device based on one through the command line?
Update:
When you create a device through the avd gui it creates a config file located at /.android/name-of-your-phone/Config.ini
You can add the setup options you want to a new device with -prop
example: -prop hw.sdCard=yes -prop sdcard.size=200M
, I ran the full command with the -verbose
flag and you can see the config it spins up with. It's annoying that the options aren't comma-delineated but whatever.
The full command that wound up working for me was:
The ones you're seeing (presumably in Android Studio) are pre-packaged with the IDE. If you look in to Android Studio's application files (in Mac) by right clicking on the app file and selecting 'Show Package Contents':
Applications ▸ Android Studio.app ▸ Contents ▸ plugins ▸ android ▸ lib ▸ device-art-resources ▸ device-art.xml
You'll see something like this:
Furthermore, I've found ConfigGenerator.java class in the SDK folder which has all of these pre-packaged device configuration and definitions in Java. Take a look, I think this is what you may be looking for.
android-sdks ▸ sources ▸ android-21 ▸ com ▸ android ▸ layoutlib ▸ bridge ▸ intensive ▸ setup ▸ ConfigGenerator.java
So that being said, you may not have a direct access to use this proprietary avd definitions. But perhaps, you could create a script and use this file as a baseline to build on top and derive at your own solution.
Hope this helps.
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error: cannot find symbol class AsyncCallWS Android
java,android,web-services
On the link you post, I see a class like below. Create this class in your project before using it. private class AsyncCallWS extends AsyncTask<String, Void, Void> { @Override protected Void doInBackground(String... params) { Log.i(TAG, 'doInBackground'); getFahrenheit(celcius); return null; } @Override protected void onPostExecute(Void result) { Log.i(TAG, 'onPostExecute'); tv.setText(fahren +...