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Add Camera prewarm intent.

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Also adds a test app for testing this intent. In addition, the secure
camera gets launched in the background to fix jank while sending the
intent.

Bug: 20016619
Change-Id: I7bb7e22ddaf5dc67fc09b9e63e5f3d10fe8e3ee4
This commit is contained in:
Jorim Jaggi
2015-04-02 16:32:29 -07:00
parent 6e9fa1a4b7
commit a86790bf23
14 changed files with 332 additions and 19 deletions
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29
core/java/android/provider/MediaStore.java
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@@ -225,6 +225,35 @@ public final class MediaStore {
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String INTENT_ACTION_STILL_IMAGE_CAMERA = "android.media.action.STILL_IMAGE_CAMERA";
/**
* The name of the Intent action used to indicate that a camera launch might be imminent. This
* broadcast should be targeted to the package that is receiving
* {@link #INTENT_ACTION_STILL_IMAGE_CAMERA} or
* {@link #INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE}, depending on the context. If such
* intent would launch the resolver activity, this broadcast should not be sent at all.
* <p>
* A receiver of this broadcast should do the absolute minimum amount of work to initialize the
* camera in order to reduce startup time in likely case that shortly after an actual camera
* launch intent would be sent.
* <p>
* In case the actual intent will not be fired, the target package will receive
* {@link #ACTION_STILL_IMAGE_CAMERA_COOLDOWN}. However, it is recommended that the receiver
* also implements a timeout to close the camera after receiving this intent, as there is no
* guarantee that {@link #ACTION_STILL_IMAGE_CAMERA_COOLDOWN} will be delivered.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_STILL_IMAGE_CAMERA_PREWARM = "android.media.action.STILL_IMAGE_CAMERA_PREWARM";
/**
* The name of the Intent action used to indicate that an imminent camera launch has been
* cancelled by the user. This broadcast should be targeted to the package that has received
* {@link #ACTION_STILL_IMAGE_CAMERA_PREWARM}.
* <p>
* A receiver of this broadcast should close the camera immediately.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_STILL_IMAGE_CAMERA_COOLDOWN = "android.media.action.STILL_IMAGE_CAMERA_COOLDOWN";
/**
* The name of the Intent action used to launch a camera in still image mode
* for use when the device is secured (e.g. with a pin, password, pattern,