| /* |
| * Copyright (C) 2017 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 com.android.server.wm; |
| |
| import static android.app.NotificationManager.IMPORTANCE_MIN; |
| import static android.app.PendingIntent.FLAG_CANCEL_CURRENT; |
| import static android.content.Context.NOTIFICATION_SERVICE; |
| import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK; |
| import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK; |
| import static android.provider.Settings.ACTION_MANAGE_OVERLAY_PERMISSION; |
| |
| import android.app.Notification; |
| import android.app.NotificationChannel; |
| import android.app.NotificationChannelGroup; |
| import android.app.NotificationManager; |
| import android.app.PendingIntent; |
| import android.content.Context; |
| |
| import android.content.Intent; |
| import android.content.pm.ApplicationInfo; |
| import android.content.pm.PackageManager; |
| import android.graphics.Bitmap; |
| import android.graphics.drawable.Drawable; |
| |
| import android.net.Uri; |
| import android.os.Bundle; |
| |
| import com.android.internal.R; |
| import com.android.server.policy.IconUtilities; |
| |
| /** Displays an ongoing notification for a process displaying an alert window */ |
| class AlertWindowNotification { |
| private static final String CHANNEL_PREFIX = "com.android.server.wm.AlertWindowNotification - "; |
| private static final int NOTIFICATION_ID = 0; |
| |
| private static int sNextRequestCode = 0; |
| private static NotificationChannelGroup sChannelGroup; |
| private final int mRequestCode; |
| private final WindowManagerService mService; |
| private String mNotificationTag; |
| private final NotificationManager mNotificationManager; |
| private final String mPackageName; |
| private boolean mPosted; |
| private IconUtilities mIconUtilities; |
| |
| AlertWindowNotification(WindowManagerService service, String packageName) { |
| mService = service; |
| mPackageName = packageName; |
| mNotificationManager = |
| (NotificationManager) mService.mContext.getSystemService(NOTIFICATION_SERVICE); |
| mNotificationTag = CHANNEL_PREFIX + mPackageName; |
| mRequestCode = sNextRequestCode++; |
| mIconUtilities = new IconUtilities(mService.mContext); |
| } |
| |
| void post() { |
| // We can't create/post the notification while the window manager lock is held since it will |
| // end up calling into activity manager. So, we post a message to do it later. |
| mService.mH.post(this::onPostNotification); |
| } |
| |
| /** Cancels the notification */ |
| void cancel(boolean deleteChannel) { |
| // We can't call into NotificationManager with WM lock held since it might call into AM. |
| // So, we post a message to do it later. |
| mService.mH.post(() -> onCancelNotification(deleteChannel)); |
| } |
| |
| /** Don't call with the window manager lock held! */ |
| private void onCancelNotification(boolean deleteChannel) { |
| if (!mPosted) { |
| // Notification isn't currently posted... |
| return; |
| } |
| mPosted = false; |
| mNotificationManager.cancel(mNotificationTag, NOTIFICATION_ID); |
| if (deleteChannel) { |
| mNotificationManager.deleteNotificationChannel(mNotificationTag); |
| } |
| } |
| |
| /** Don't call with the window manager lock held! */ |
| private void onPostNotification() { |
| if (mPosted) { |
| // Notification already posted... |
| return; |
| } |
| mPosted = true; |
| |
| final Context context = mService.mContext; |
| final PackageManager pm = context.getPackageManager(); |
| final ApplicationInfo aInfo = getApplicationInfo(pm, mPackageName); |
| final String appName = (aInfo != null) |
| ? pm.getApplicationLabel(aInfo).toString() : mPackageName; |
| |
| createNotificationChannel(context, appName); |
| |
| final String message = context.getString(R.string.alert_windows_notification_message, |
| appName); |
| Bundle extras = new Bundle(); |
| extras.putStringArray(Notification.EXTRA_FOREGROUND_APPS, new String[] {mPackageName}); |
| final Notification.Builder builder = new Notification.Builder(context, mNotificationTag) |
| .setOngoing(true) |
| .setContentTitle( |
| context.getString(R.string.alert_windows_notification_title, appName)) |
| .setContentText(message) |
| .setSmallIcon(R.drawable.alert_window_layer) |
| .setColor(context.getColor(R.color.system_notification_accent_color)) |
| .setStyle(new Notification.BigTextStyle().bigText(message)) |
| .setLocalOnly(true) |
| .addExtras(extras) |
| .setContentIntent(getContentIntent(context, mPackageName)); |
| |
| if (aInfo != null) { |
| final Drawable drawable = pm.getApplicationIcon(aInfo); |
| if (drawable != null) { |
| final Bitmap bitmap = mIconUtilities.createIconBitmap(drawable); |
| builder.setLargeIcon(bitmap); |
| } |
| } |
| |
| mNotificationManager.notify(mNotificationTag, NOTIFICATION_ID, builder.build()); |
| } |
| |
| private PendingIntent getContentIntent(Context context, String packageName) { |
| final Intent intent = new Intent(ACTION_MANAGE_OVERLAY_PERMISSION, |
| Uri.fromParts("package", packageName, null)); |
| intent.setFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_CLEAR_TASK); |
| // Calls into activity manager... |
| return PendingIntent.getActivity(context, mRequestCode, intent, FLAG_CANCEL_CURRENT); |
| } |
| |
| private void createNotificationChannel(Context context, String appName) { |
| if (sChannelGroup == null) { |
| sChannelGroup = new NotificationChannelGroup(CHANNEL_PREFIX, |
| mService.mContext.getString( |
| R.string.alert_windows_notification_channel_group_name)); |
| mNotificationManager.createNotificationChannelGroup(sChannelGroup); |
| } |
| |
| final String nameChannel = |
| context.getString(R.string.alert_windows_notification_channel_name, appName); |
| |
| NotificationChannel channel = mNotificationManager.getNotificationChannel(mNotificationTag); |
| if (channel != null) { |
| return; |
| } |
| channel = new NotificationChannel(mNotificationTag, nameChannel, IMPORTANCE_MIN); |
| channel.enableLights(false); |
| channel.enableVibration(false); |
| channel.setBlockableSystem(true); |
| channel.setGroup(sChannelGroup.getId()); |
| channel.setBypassDnd(true); |
| mNotificationManager.createNotificationChannel(channel); |
| } |
| |
| |
| private ApplicationInfo getApplicationInfo(PackageManager pm, String packageName) { |
| try { |
| return pm.getApplicationInfo(packageName, 0); |
| } catch (PackageManager.NameNotFoundException e) { |
| return null; |
| } |
| } |
| } |