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NotificationAssistantService.java
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NotificationAssistantService.java
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/*
* Copyright (C) 2015 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.service.notification;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SdkConstant;
import android.annotation.SystemApi;
import android.annotation.TestApi;
import android.app.NotificationChannel;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.util.Log;
import com.android.internal.os.SomeArgs;
import java.util.ArrayList;
import java.util.List;
/**
* A service that helps the user manage notifications.
* @hide
*/
@SystemApi
@TestApi
public abstract class NotificationAssistantService extends NotificationListenerService {
private static final String TAG = "NotificationAssistants";
/**
* The {@link Intent} that must be declared as handled by the service.
*/
@SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION)
public static final String SERVICE_INTERFACE
= "android.service.notification.NotificationAssistantService";
private Handler mHandler;
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
mHandler = new MyHandler(getContext().getMainLooper());
}
@Override
public final IBinder onBind(Intent intent) {
if (mWrapper == null) {
mWrapper = new NotificationAssistantServiceWrapper();
}
return mWrapper;
}
/**
* A notification was snoozed until a context. For use with
* {@link Adjustment#KEY_SNOOZE_CRITERIA}. When the device reaches the given context, the
* assistant should restore the notification with {@link #unsnoozeNotification(String)}.
*
* @param sbn the notification to snooze
* @param snoozeCriterionId the {@link SnoozeCriterion#getId()} representing a device context.
*/
abstract public void onNotificationSnoozedUntilContext(StatusBarNotification sbn,
String snoozeCriterionId);
/**
* A notification was posted by an app. Called before alert.
*
* @param sbn the new notification
* @return an adjustment or null to take no action, within 100ms.
*/
abstract public Adjustment onNotificationEnqueued(StatusBarNotification sbn);
/**
* Updates a notification. N.B. this won’t cause
* an existing notification to alert, but might allow a future update to
* this notification to alert.
*
* @param adjustment the adjustment with an explanation
*/
public final void adjustNotification(Adjustment adjustment) {
if (!isBound()) return;
try {
getNotificationInterface().applyAdjustmentFromAssistant(mWrapper, adjustment);
} catch (android.os.RemoteException ex) {
Log.v(TAG, "Unable to contact notification manager", ex);
throw ex.rethrowFromSystemServer();
}
}
/**
* Updates existing notifications. Re-ranking won't occur until all adjustments are applied.
* N.B. this won’t cause an existing notification to alert, but might allow a future update to
* these notifications to alert.
*
* @param adjustments a list of adjustments with explanations
*/
public final void adjustNotifications(List<Adjustment> adjustments) {
if (!isBound()) return;
try {
getNotificationInterface().applyAdjustmentsFromAssistant(mWrapper, adjustments);
} catch (android.os.RemoteException ex) {
Log.v(TAG, "Unable to contact notification manager", ex);
throw ex.rethrowFromSystemServer();
}
}
/**
* Inform the notification manager about un-snoozing a specific notification.
* <p>
* This should only be used for notifications snoozed by this listener using
* {@link #snoozeNotification(String, String)}. Once un-snoozed, you will get a
* {@link #onNotificationPosted(StatusBarNotification, RankingMap)} callback for the
* notification.
* @param key The key of the notification to snooze
*/
public final void unsnoozeNotification(String key) {
if (!isBound()) return;
try {
getNotificationInterface().unsnoozeNotificationFromAssistant(mWrapper, key);
} catch (android.os.RemoteException ex) {
Log.v(TAG, "Unable to contact notification manager", ex);
}
}
private class NotificationAssistantServiceWrapper extends NotificationListenerWrapper {
@Override
public void onNotificationEnqueued(IStatusBarNotificationHolder sbnHolder) {
StatusBarNotification sbn;
try {
sbn = sbnHolder.get();
} catch (RemoteException e) {
Log.w(TAG, "onNotificationEnqueued: Error receiving StatusBarNotification", e);
return;
}
SomeArgs args = SomeArgs.obtain();
args.arg1 = sbn;
mHandler.obtainMessage(MyHandler.MSG_ON_NOTIFICATION_ENQUEUED,
args).sendToTarget();
}
@Override
public void onNotificationSnoozedUntilContext(
IStatusBarNotificationHolder sbnHolder, String snoozeCriterionId)
throws RemoteException {
StatusBarNotification sbn;
try {
sbn = sbnHolder.get();
} catch (RemoteException e) {
Log.w(TAG, "onNotificationSnoozed: Error receiving StatusBarNotification", e);
return;
}
SomeArgs args = SomeArgs.obtain();
args.arg1 = sbn;
args.arg2 = snoozeCriterionId;
mHandler.obtainMessage(MyHandler.MSG_ON_NOTIFICATION_SNOOZED,
args).sendToTarget();
}
}
private final class MyHandler extends Handler {
public static final int MSG_ON_NOTIFICATION_ENQUEUED = 1;
public static final int MSG_ON_NOTIFICATION_SNOOZED = 2;
public MyHandler(Looper looper) {
super(looper, null, false);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_ON_NOTIFICATION_ENQUEUED: {
SomeArgs args = (SomeArgs) msg.obj;
StatusBarNotification sbn = (StatusBarNotification) args.arg1;
args.recycle();
Adjustment adjustment = onNotificationEnqueued(sbn);
if (adjustment != null) {
if (!isBound()) return;
try {
getNotificationInterface().applyEnqueuedAdjustmentFromAssistant(
mWrapper, adjustment);
} catch (android.os.RemoteException ex) {
Log.v(TAG, "Unable to contact notification manager", ex);
throw ex.rethrowFromSystemServer();
}
}
break;
}
case MSG_ON_NOTIFICATION_SNOOZED: {
SomeArgs args = (SomeArgs) msg.obj;
StatusBarNotification sbn = (StatusBarNotification) args.arg1;
String snoozeCriterionId = (String) args.arg2;
args.recycle();
onNotificationSnoozedUntilContext(sbn, snoozeCriterionId);
break;
}
}
}
}
}