Add HomeVisibilityObserver APIs in ActivityManager. (c99b83b9) · Commits · e / os / android_frameworks_base

api/system-current.txt

+7 −0

Original line number	Diff line number	Diff line
		@@ -327,10 +327,12 @@ package android.app {
		method @NonNull public java.util.Collection<java.util.Locale> getSupportedLocales();
		method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public int getUidImportance(int);
		method @RequiresPermission(android.Manifest.permission.KILL_UID) public void killUid(int, String);
		method public void registerHomeVisibilityObserver(@NonNull android.app.HomeVisibilityObserver);
		method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public void removeOnUidImportanceListener(android.app.ActivityManager.OnUidImportanceListener);
		method public void setDeviceLocales(@NonNull android.os.LocaleList);
		method @RequiresPermission(android.Manifest.permission.RESTRICTED_VR_ACCESS) public static void setPersistentVrThread(int);
		method @RequiresPermission(android.Manifest.permission.MANAGE_USERS) public boolean switchUser(@NonNull android.os.UserHandle);
		method public void unregisterHomeVisibilityObserver(@NonNull android.app.HomeVisibilityObserver);
		method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public boolean updateMccMncConfiguration(@NonNull String, @NonNull String);
		}

		@@ -579,6 +581,11 @@ package android.app {
		field public static final String ACTION_DOWNLOAD_COMPLETED = "android.intent.action.DOWNLOAD_COMPLETED";
		}

		public abstract class HomeVisibilityObserver {
		ctor public HomeVisibilityObserver();
		method public abstract void onHomeVisibilityChanged(boolean);
		}

		public abstract class InstantAppResolverService extends android.app.Service {
		ctor public InstantAppResolverService();
		method public final void attachBaseContext(android.content.Context);

core/java/android/app/ActivityManager.java

+32 −0

Original line number	Diff line number	Diff line
		@@ -78,6 +78,7 @@ import com.android.internal.os.RoSystemProperties;
		import com.android.internal.os.TransferPipe;
		import com.android.internal.util.FastPrintWriter;
		import com.android.internal.util.MemInfoReader;
		import com.android.internal.util.Preconditions;
		import com.android.server.LocalServices;

		import org.xmlpull.v1.XmlSerializer;
		@@ -4584,4 +4585,35 @@ public class ActivityManager {
		throw e.rethrowFromSystemServer();
		}
		}

		/**
		* Register with {@link HomeVisibilityObserver} with ActivityManager.
		* @hide
		*/
		@SystemApi
		public void registerHomeVisibilityObserver(@NonNull HomeVisibilityObserver observer) {
		Preconditions.checkNotNull(observer);
		try {
		observer.init(mContext, this);
		getService().registerProcessObserver(observer.mObserver);
		// Notify upon first registration.
		observer.onHomeVisibilityChanged(observer.mIsHomeActivityVisible);
		} catch (RemoteException e) {
		throw e.rethrowFromSystemServer();
		}
		}

		/**
		* Unregister with {@link HomeVisibilityObserver} with ActivityManager.
		* @hide
		*/
		@SystemApi
		public void unregisterHomeVisibilityObserver(@NonNull HomeVisibilityObserver observer) {
		Preconditions.checkNotNull(observer);
		try {
		getService().unregisterProcessObserver(observer.mObserver);
		} catch (RemoteException e) {
		throw e.rethrowFromSystemServer();
		}
		}
		}

core/java/android/app/HomeVisibilityObserver.java

0 → 100644

+98 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2020 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.app;

		import android.annotation.SystemApi;
		import android.content.Context;
		import android.content.Intent;
		import android.content.pm.PackageManager;
		import android.content.pm.ResolveInfo;

		import java.util.List;

		/**
		* An observer / callback to create and register by
		* {@link ActivityManager#registerHomeVisibilityObserver} so that it's triggered when
		* visibility of home page changes.
		* @hide
		*/
		@SystemApi
		public abstract class HomeVisibilityObserver {
		private Context mContext;
		private ActivityManager mActivityManager;
		/** @hide */
		IProcessObserver.Stub mObserver;
		/** @hide */
		boolean mIsHomeActivityVisible;

		/** @hide */
		void init(Context context, ActivityManager activityManager) {
		mContext = context;
		mActivityManager = activityManager;
		mIsHomeActivityVisible = isHomeActivityVisible();
		}

		/**
		* The API that needs implemented and will be triggered when activity on home page changes.
		*/
		public abstract void onHomeVisibilityChanged(boolean isHomeActivityVisible);

		public HomeVisibilityObserver() {
		mObserver = new IProcessObserver.Stub() {
		@Override
		public void onForegroundActivitiesChanged(int pid, int uid, boolean fg) {
		boolean isHomeActivityVisible = isHomeActivityVisible();
		if (mIsHomeActivityVisible != isHomeActivityVisible) {
		mIsHomeActivityVisible = isHomeActivityVisible;
		onHomeVisibilityChanged(mIsHomeActivityVisible);
		}
		}

		@Override
		public void onForegroundServicesChanged(int pid, int uid, int fgServiceTypes) {
		}

		@Override
		public void onProcessDied(int pid, int uid) {
		}
		};
		}

		private boolean isHomeActivityVisible() {
		List<ActivityManager.RunningTaskInfo> tasks = mActivityManager.getRunningTasks(1);
		if (tasks == null \|\| tasks.isEmpty()) {
		return false;
		}

		String top = tasks.get(0).topActivity.getPackageName();
		if (top == null) {
		return false;
		}

		// We can assume that the screen is idle if the home application is in the foreground.
		final Intent intent = new Intent(Intent.ACTION_MAIN, null);
		intent.addCategory(Intent.CATEGORY_HOME);

		ResolveInfo info = mContext.getPackageManager().resolveActivity(intent,
		PackageManager.MATCH_DEFAULT_ONLY);
		if (info != null && top.equals(info.activityInfo.packageName)) {
		return true;
		}

		return false;
		}
		}