我在我的应用程序中实现了GCM推送通知，并且已经成功完成，但是在一些设备上，当应用程序关闭时，它不会显示通知。
未显示通知的设备清单：
Redmi-2
lenovo
Gionee
有谁能解释一下问题出在哪里以及如何解决它。
这是我的清单文件:-
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="student.skoolstar.android.catalyst.com.schoolstar.skoolstarstudent">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<permission
android:name="student.skoolstar.android.catalyst.com.schoolstar.skoolstarstudent.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="student.skoolstar.android.catalyst.com.schoolstar.skoolstarstudent.permission.C2D_MESSAGE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:name="student.skoolstar.android.catalyst.com.schoolstar.skoolstarstudent.Controller"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/MyMaterialTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Login"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".ListOfClass"
android:screenOrientation="portrait">
</activity>
<activity
android:name=".EditProfile"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".ShowStudentList"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<receiver
android:name="student.skoolstar.android.catalyst.com.schoolstar.skoolstarstudent.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<!-- Receives the actual messages. -->
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<!-- Receives the registration id. -->
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="schoolstar.com.catalyst.android.skoolstar" />
</intent-filter>
</receiver>
<service android:name=".GCMNotificationIntentService" />
<activity
android:name=".Message"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".Attendance"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".NewMessage"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".GroupMessage"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
<activity
android:name=".Test_Chat"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden">
</activity>
</application>
</manifest>
这里是我的服务名称GCMNotificationIntentService：
public class GCMNotificationIntentService extends GCMBaseIntentService {
public static final int NOTIFICATION_ID = 1;
private NotificationManager mNotificationManager;
NotificationCompat.Builder builder;
Database db;
private Controller aController = null;
public GCMNotificationIntentService() {
// Call extended class Constructor GCMBaseIntentService
super(Constants.GOOGLE_SENDER_ID);
}
public static final String TAG = "GCMNotificationIntentService";
@Override
protected void onRegistered(Context context, String registrationId) {
}
@Override
protected void onUnregistered(Context context, String registrationId) {
Log.d("unref",registrationId);
if(aController == null)
aController = (Controller) getApplicationContext();
Toast.makeText(getApplicationContext(),"hello no",Toast.LENGTH_LONG).show();
aController.displayMessageOnScreen(context,
getString(R.string.gcm_unregistered));
aController.unregister(context, registrationId);
}
@Override
public void onError(Context context, String errorId) {
Log.d("error","");
if(aController == null)
aController = (Controller) getApplicationContext();
aController.displayMessageOnScreen(context,
getString(R.string.gcm_error, errorId));
}
@Override
protected void onMessage(Context context, Intent intent) {
if(aController == null)
aController = (Controller) getApplicationContext();
aController.acquireWakeLock(getApplicationContext());
String message = intent.getExtras().getString("message");
String formuser = intent.getExtras().getString("formuser");
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT+5:30"));
Date currentLocalTime = cal.getTime();
DateFormat date = new SimpleDateFormat("HH:mm a");
date.setTimeZone(TimeZone.getTimeZone("GMT+5:30"));
String localTime = date.format(currentLocalTime);
db = new Database(context);
int from_id = 0;
List<FetchData> fetchdata = db.getAllContacts();
for (FetchData fd : fetchdata)
{
from_id=fd.getID();//get ser no
}
db.storeMessage(420, formuser, from_id + "", message, "text", localTime, "F", "ST", "R");
aController.displayMessageOnScreen(context, message);
// notifies user
sendNotification(context,message);
}
private void sendNotification(Context context,String msg) {
String app_name = context.getResources().getString(R.string.app_name);
mNotificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, ListOfClass.class), 0);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(app_name)
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText("New Message")
.setSound(alarmSound);
mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");
wl.acquire(15000);
// Log.d(TAG, "Notification sent successfully.");
}
}
当我看到 WhatsApp、Hike 和其他通知应用程序时，它们总是在后台线程中运行，但我的应用程序并不总是在后台运行。所以这也可能是原因之一。我最近正在开发 Android 应用，请帮帮我。提前致谢！