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CameraActivity.md

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Using CameraActivity

The simplest way to use this library is to use CameraActivity. This gives you the same "API" as you get with the Android SDK's ACTION_IMAGE_CAPTURE, making it fairly easy for you to get existing ACTION_IMAGE_CAPTURE working with your own local camera activity.

Getting the Intent

The simplest way to craft the right Intent to use is to create a CameraActivity.IntentBuilder, call whatever configuration methods that you want on that builder, and have it build() you an Intent. That Intent can be used with startActivityForResult(), just as you might have used it with an ACTION_IMAGE_CAPTURE Intent.

Under the covers, CameraActivity.IntentBuilder is simply packaging a series of extras on the Intent, so you can always put those extras on yourself if you so choose. The following table lists the available configuration methods on CameraActivity.IntentBuilder, the corresponding extra names (defined as constants on CameraActivity), their default values, and what their behavior is:

IntentBuilder Method Extra Key Data Type Purpose
debug() EXTRA_DEBUG_ENABLED boolean Indicate if extra debugging information should be dumped to LogCat (default is false)
facing() EXTRA_FACING CameraSelectionCriteria.Facing Indicate the preferred camera to start with (BACK or FRONT, default is BACK)
skipConfirm() EXTRA_CONFIRM boolean Indicate if the user should be presented with a preview of the image and needs to accept it before proceeding (default is to show the confirmirmation screen)
to() MediaStore.EXTRA_OUTPUT Uri (though to() also accepts File) Destination for picture to be written, where null means to return a thumbnail via the data extra (default is null)

Example Use of IntentBuilder

  Intent i=new CameraActivity.IntentBuilder(MainActivity.this)
      .facing(CameraSelectionCriteria.Facing.FRONT)
      .to(new File(testRoot, "portrait-front.jpg"))
      .skipConfirm()
      .debug()
      .build();

  startActivityForResult(i, REQUEST_PORTRAIT_FFC);

Output

If you provide the destination Uri via to(), the image will be written there, and the Uri of the Intent delivered to onActivityResult() will be your requested Uri.

If you do not provide the destination Uri, a thumbnail image will be supplied via the data extra on the Intent delivered to onActivityResult().

And, of course, the resultCode passed to onActivityResult() will indicate if the user took a picture or abandoned the operation.

Configuring the Manifest Entry

Getting all of the above working requires nothing in your manifest. However, more often than not, you will want to change aspects of the activity, such as its theme.

To do that, add your own <activity> element to the manifest, pointing to the CameraActivity class, and add in whatever attributes or child elements that you need.

For example, the following manifest entry sets the theme:

<activity
      android:name="com.commonsware.cwac.cam2.CameraActivity"
      android:theme="@style/AppTheme"/>

Note that CameraActivity does not support being exported. Do not add an <intent-filter> to this activity or otherwise mark it as being exported.