Add API to disable snapshotting of activities (0fe7ce96) · Commits · e / os / android_frameworks_base

api/system-current.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -3859,6 +3859,7 @@ package android.app {
		method public void setContentView(android.view.View);
		method public void setContentView(android.view.View, android.view.ViewGroup.LayoutParams);
		method public final void setDefaultKeyMode(int);
		method public void setDisablePreviewScreenshots(boolean);
		method public void setEnterSharedElementCallback(android.app.SharedElementCallback);
		method public void setExitSharedElementCallback(android.app.SharedElementCallback);
		method public final void setFeatureDrawable(int, android.graphics.drawable.Drawable);

core/java/android/app/Activity.java

+27 −0

Original line number	Diff line number	Diff line
		@@ -7257,6 +7257,33 @@ public class Activity extends ContextThemeWrapper
		mAutoFillResetNeeded = true;
		}

		/**
		* If set to true, this indicates to the system that it should never take a
		* screenshot of the activity to be used as a representation while it is not in a started state.
		* <p>
		* Note that the system may use the window background of the theme instead to represent
		* the window when it is not running.
		* <p>
		* Also note that in comparison to {@link android.view.WindowManager.LayoutParams#FLAG_SECURE},
		* this only affects the behavior when the activity's screenshot would be used as a
		* representation when the activity is not in a started state, i.e. in Overview. The system may
		* still take screenshots of the activity in other contexts; for example, when the user takes a
		* screenshot of the entire screen, or when the active
		* {@link android.service.voice.VoiceInteractionService} requests a screenshot via
		* {@link android.service.voice.VoiceInteractionSession#SHOW_WITH_SCREENSHOT}.
		*
		* @param disable {@code true} to disable preview screenshots; {@code false} otherwise.
		* @hide
		*/
		@SystemApi
		public void setDisablePreviewScreenshots(boolean disable) {
		try {
		ActivityManager.getService().setDisablePreviewScreenshots(mToken, disable);
		} catch (RemoteException e) {
		Log.e(TAG, "Failed to call setDisablePreviewScreenshots", e);
		}
		}

		class HostCallbacks extends FragmentHostCallback<Activity> {
		public HostCallbacks() {
		super(Activity.this /activity/);

core/java/android/app/IActivityManager.aidl

+5 −0

Original line number	Diff line number	Diff line
		@@ -612,6 +612,11 @@ interface IActivityManager {

		void waitForNetworkStateUpdate(long procStateSeq);

		/**
		* See {@link android.app.Activity#setDisablePreviewScreenshots}
		*/
		void setDisablePreviewScreenshots(IBinder token, boolean disable);

		// WARNING: when these transactions are updated, check if they are any callers on the native
		// side. If so, make sure they are using the correct transaction ids and arguments.
		// If a transaction which will also be used on the native side is being inserted, add it

services/core/java/com/android/server/am/ActivityManagerService.java

+19 −3

Original line number	Diff line number	Diff line
		@@ -128,7 +128,6 @@ import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NA
		import static com.android.server.am.ActivityStackSupervisor.ActivityContainer.FORCE_NEW_TASK_FLAGS;
		import static com.android.server.am.ActivityStackSupervisor.CREATE_IF_NEEDED;
		import static com.android.server.am.ActivityStackSupervisor.DEFER_RESUME;
		import static com.android.server.am.ActivityStackSupervisor.FORCE_FOCUS;
		import static com.android.server.am.ActivityStackSupervisor.MATCH_TASK_IN_STACKS_ONLY;
		import static com.android.server.am.ActivityStackSupervisor.MATCH_TASK_IN_STACKS_OR_RECENT_TASKS;
		import static com.android.server.am.ActivityStackSupervisor.ON_TOP;
		@@ -149,8 +148,6 @@ import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_FRONT;
		import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
		import static org.xmlpull.v1.XmlPullParser.START_TAG;

		import static java.lang.Integer.MAX_VALUE;

		import android.Manifest;
		import android.Manifest.permission;
		import android.annotation.NonNull;
		@@ -10826,6 +10823,25 @@ public class ActivityManagerService extends IActivityManager.Stub
		}
		}

		@Override
		public void setDisablePreviewScreenshots(IBinder token, boolean disable)
		throws RemoteException {
		synchronized (this) {
		final ActivityRecord r = ActivityRecord.isInStackLocked(token);
		if (r == null) {
		Slog.w(TAG, "setDisablePreviewScreenshots: Unable to find activity for token="
		+ token);
		return;
		}
		final long origId = Binder.clearCallingIdentity();
		try {
		r.setDisablePreviewScreenshots(disable);
		} finally {
		Binder.restoreCallingIdentity(origId);
		}
		}
		}

		// =========================================================
		// CONTENT PROVIDERS
		// =========================================================

services/core/java/com/android/server/am/ActivityRecord.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -1973,6 +1973,10 @@ final class ActivityRecord implements AppWindowContainerListener {
		task.taskId, requestedOrientation);
		}

		void setDisablePreviewScreenshots(boolean disable) {
		mWindowContainerController.setDisablePreviewScreenshots(disable);
		}

		/**
		* Set the last reported global configuration to the client. Should be called whenever a new
		* global configuration is sent to the client for this activity.