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/*
* Copyright (C) 2018-2021 The LineageOS 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 org.lineageos.internal.util;
import android.app.ActivityManager;
import android.app.ActivityManager.StackInfo;
import android.app.ActivityManagerNative;
import android.app.ActivityOptions;
import android.app.ActivityTaskManager;
import android.app.IActivityManager;
import android.app.IActivityTaskManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.RemoteException;
import android.os.UserHandle;
import android.util.Log;
import android.widget.Toast;
import org.lineageos.platform.internal.R;
import java.util.List;
public class ActionUtils {
private static final boolean DEBUG = false;
private static final String TAG = ActionUtils.class.getSimpleName();
private static final String SYSTEMUI_PACKAGE = "com.android.systemui";
/**
* Kills the top most / most recent user application, but leaves out the launcher.
*
* @param context the current context, used to retrieve the package manager.
* @param userId the ID of the currently active user
* @return {@code true} when a user application was found and closed.
*/
public static boolean killForegroundApp(Context context, int userId) {
try {
return killForegroundAppInternal(context, userId);
} catch (RemoteException e) {
Log.e(TAG, "Could not kill foreground app");
}
return false;
}
private static boolean killForegroundAppInternal(Context context, int userId)
throws RemoteException {
final IActivityTaskManager atm = ActivityTaskManager.getService();
if (atm.getLockTaskModeState() == ActivityManager.LOCK_TASK_MODE_PINNED) {
return false;
}
final String packageName = getForegroundTaskPackageName(context, userId);
if (packageName == null) {
return false;
}
final IActivityManager am = ActivityManagerNative.getDefault();
am.forceStopPackage(packageName, UserHandle.USER_CURRENT);
Toast.makeText(context, R.string.app_killed_message, Toast.LENGTH_SHORT).show();
return true;
}
/**
* Attempt to bring up the last activity in the stack before the current active one.
*
* @param context
* @return whether an activity was found to switch to
*/
public static boolean switchToLastApp(Context context, int userId) {
try {
return switchToLastAppInternal(context, userId);
} catch (RemoteException e) {
Log.e(TAG, "Could not switch to last app");
}
return false;
}
private static boolean switchToLastAppInternal(Context context, int userId)
throws RemoteException {
ActivityManager.RecentTaskInfo lastTask = getLastTask(context, userId);
if (lastTask == null || lastTask.id < 0) {
return false;
}
final String packageName = lastTask.baseIntent.getComponent().getPackageName();
final IActivityManager am = ActivityManagerNative.getDefault();
final ActivityOptions opts = ActivityOptions.makeCustomAnimation(context,
org.lineageos.platform.internal.R.anim.last_app_in,
org.lineageos.platform.internal.R.anim.last_app_out);
if (DEBUG) Log.d(TAG, "switching to " + packageName);
am.moveTaskToFront(null, null, lastTask.id,
ActivityManager.MOVE_TASK_NO_USER_ACTION, opts.toBundle());
return true;
}
private static ActivityManager.RecentTaskInfo getLastTask(Context context, int userId)
throws RemoteException {
final String defaultHomePackage = resolveCurrentLauncherPackage(context, userId);
final IActivityManager am = ActivityManager.getService();
final List<ActivityManager.RecentTaskInfo> tasks = am.getRecentTasks(5,
ActivityManager.RECENT_IGNORE_UNAVAILABLE, userId).getList();
for (int i = 1; i < tasks.size(); i++) {
ActivityManager.RecentTaskInfo task = tasks.get(i);
if (task.origActivity != null) {
task.baseIntent.setComponent(task.origActivity);
}
String packageName = task.baseIntent.getComponent().getPackageName();
if (!packageName.equals(defaultHomePackage)
&& !packageName.equals(SYSTEMUI_PACKAGE)) {
return task;
}
}
return null;
}
private static String getForegroundTaskPackageName(Context context, int userId)
throws RemoteException {
final String defaultHomePackage = resolveCurrentLauncherPackage(context, userId);
final IActivityManager am = ActivityManager.getService();
final StackInfo focusedStack = am.getFocusedStackInfo();
if (focusedStack == null || focusedStack.topActivity == null) {
return null;
}
final String packageName = focusedStack.topActivity.getPackageName();
if (!packageName.equals(defaultHomePackage)
&& !packageName.equals(SYSTEMUI_PACKAGE)) {
return packageName;
}
return null;
}
private static String resolveCurrentLauncherPackage(Context context, int userId) {
final Intent launcherIntent = new Intent(Intent.ACTION_MAIN)
.addCategory(Intent.CATEGORY_HOME);
final PackageManager pm = context.getPackageManager();
final ResolveInfo launcherInfo = pm.resolveActivityAsUser(launcherIntent, 0, userId);
if (launcherInfo.activityInfo != null &&
!launcherInfo.activityInfo.packageName.equals("android")) {
return launcherInfo.activityInfo.packageName;
}
return null;
}
}
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