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/*
* Copyright (C) 2014 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.SdkConstant;
import android.annotation.SystemApi;
import android.app.INotificationManager;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.ServiceManager;
import android.util.Log;
/**
* A service that provides conditions about boolean state.
* <p>To extend this class, you must declare the service in your manifest file with
* the {@link android.Manifest.permission#BIND_CONDITION_PROVIDER_SERVICE} permission
* and include an intent filter with the {@link #SERVICE_INTERFACE} action. For example:</p>
* <pre>
* <service android:name=".MyConditionProvider"
* android:label="@string/service_name"
* android:permission="android.permission.BIND_CONDITION_PROVIDER_SERVICE">
* <intent-filter>
* <action android:name="android.service.notification.ConditionProviderService" />
* </intent-filter>
* </service></pre>
*
* @hide
*/
@SystemApi
public abstract class ConditionProviderService extends Service {
private final String TAG = ConditionProviderService.class.getSimpleName()
+ "[" + getClass().getSimpleName() + "]";
private final H mHandler = new H();
private Provider mProvider;
private INotificationManager mNoMan;
/**
* 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.ConditionProviderService";
abstract public void onConnected();
abstract public void onRequestConditions(int relevance);
abstract public void onSubscribe(Uri conditionId);
abstract public void onUnsubscribe(Uri conditionId);
private final INotificationManager getNotificationInterface() {
if (mNoMan == null) {
mNoMan = INotificationManager.Stub.asInterface(
ServiceManager.getService(Context.NOTIFICATION_SERVICE));
}
return mNoMan;
}
public final void notifyCondition(Condition condition) {
if (condition == null) return;
notifyConditions(new Condition[]{ condition });
}
public final void notifyConditions(Condition... conditions) {
if (!isBound() || conditions == null) return;
try {
getNotificationInterface().notifyConditions(getPackageName(), mProvider, conditions);
} catch (android.os.RemoteException ex) {
Log.v(TAG, "Unable to contact notification manager", ex);
}
}
@Override
public IBinder onBind(Intent intent) {
if (mProvider == null) {
mProvider = new Provider();
}
return mProvider;
}
private boolean isBound() {
if (mProvider == null) {
Log.w(TAG, "Condition provider service not yet bound.");
return false;
}
return true;
}
private final class Provider extends IConditionProvider.Stub {
@Override
public void onConnected() {
mHandler.obtainMessage(H.ON_CONNECTED).sendToTarget();
}
@Override
public void onRequestConditions(int relevance) {
mHandler.obtainMessage(H.ON_REQUEST_CONDITIONS, relevance, 0).sendToTarget();
}
@Override
public void onSubscribe(Uri conditionId) {
mHandler.obtainMessage(H.ON_SUBSCRIBE, conditionId).sendToTarget();
}
@Override
public void onUnsubscribe(Uri conditionId) {
mHandler.obtainMessage(H.ON_UNSUBSCRIBE, conditionId).sendToTarget();
}
}
private final class H extends Handler {
private static final int ON_CONNECTED = 1;
private static final int ON_REQUEST_CONDITIONS = 2;
private static final int ON_SUBSCRIBE = 3;
private static final int ON_UNSUBSCRIBE = 4;
@Override
public void handleMessage(Message msg) {
String name = null;
try {
switch(msg.what) {
case ON_CONNECTED:
name = "onConnected";
onConnected();
break;
case ON_REQUEST_CONDITIONS:
name = "onRequestConditions";
onRequestConditions(msg.arg1);
break;
case ON_SUBSCRIBE:
name = "onSubscribe";
onSubscribe((Uri)msg.obj);
break;
case ON_UNSUBSCRIBE:
name = "onUnsubscribe";
onUnsubscribe((Uri)msg.obj);
break;
}
} catch (Throwable t) {
Log.w(TAG, "Error running " + name, t);
}
}
}
}
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