我正在寻找这个很多天。但我无法得到任何解决方案。当应用程序处于运行或前台状态时，通知正确。但是当应用程序从最近的应用程序选项卡（任务管理器）中杀死时，通知将不会到达。因为这个问题，我非常害怕。谁能告诉我该怎么做呢。
这是我的GcmBroadcastReceiver类： -
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent)
{ ComponentName comp = new ComponentName(context.getPackageName(),
GcmIntentService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
这是我发送通知的GcmIntentService类： -
public class GcmIntentService extends IntentService {
public static final int NOTIFICATION_ID = 1;
private NotificationManager mNotificationManager;
private final static String TAG = "GcmIntentService";
private Context mContext;
public GcmIntentService() {
super("GcmIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
Log.d(TAG, "Notification Data Json :" + extras.getString("message"));
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR
.equals(messageType)) {
sendNotification("Send error: " + extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED
.equals(messageType)) {
sendNotification("Deleted messages on server: " + extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE
.equals(messageType)) {
// This loop represents the service doing some work.
for (int i = 0; i < 5; i++) {
Log.d(TAG, " Working... " + (i + 1) + "/5 @ "
+ SystemClock.elapsedRealtime());
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
Log.i(TAG, "Completed work @ " + SystemClock.elapsedRealtime());
sendNotification(extras.getString("message"));
}
} // Release the wake lock provided by the WakefulBroadcastReceiver.
GcmBroadcastReceiver.completeWakefulIntent(intent);
} // Put the message into a notification and post it.
private void sendNotification(String msg) {
mNotificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.putExtra("KEY","aman");
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setSmallIcon(android.R.drawable.sym_def_app_icon)
.setContentTitle("Telepoh")
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText(msg)
.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE);
mBuilder.setContentIntent(contentIntent);
mBuilder.getNotification().flags |= Notification.FLAG_AUTO_CANCEL;
mBuilder.setAutoCancel(true);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
}
private int getNotificationIcon() {
boolean useWhiteIcon = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
return useWhiteIcon ? R.drawable.gcm : R.drawable.push_icon;
}
}
这是我的清单： -
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="package_name"
android:versionCode="2"
android:versionName="1.2">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<permission android:name="android.permission.GET_ACCOUNTS" />
<permission android:name="android.permission.CAMERA" />
<permission
android:name="com.google.android.gcm.demo.app.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.google.android.gcm.demo.app.permission.C2D_MESSAGE" />
<!-- This app has permission to register and receive data message. -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<application
android:allowBackup="true"
android:hardwareAccelerated="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:largeHeap="true"
android:screenOrientation="portrait"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:replace="android:icon">
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="API_KEY" />
<activity
android:name=".WelcomeActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:launchMode="singleTop"
android:theme="@style/AppTheme.NoActionBar"></activity>
<activity
android:name=".LoginActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".RegisterActivity"
android:theme="@style/AppTheme.NoActionBar" />
<activity android:name=".ForgetPasswordActivity" />
<activity android:name="pacahe_name.controller.GalleryUtil" />
<activity android:name="nl.changer.polypicker.ImagePickerActivity" />
<receiver
android:name="package_name.GCM.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<!-- Receives the actual messages. -->
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name=package_name" />
</intent-filter>
</receiver>
<service android:name="package_name.GCM.GcmIntentService" />
<activity
android:name="com.facebook.FacebookActivity"
android:screenOrientation="portrait" />
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/fb_id" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
</manifest>
当问题处于运行状态和前台状态时，我的问题是推送通知正常工作。但是当应用程序从最近的应用程序（Tab）清理时，通知不会到来。我尝试重新启动包但它不起作用。如果有人知道我做错了那么请告诉我。