我不小心将通知发送给应用程序的所有用户，并且我正在使用本地服务器进行测试。
但我发现我没有收到任何通知。但是当我使用在线服务器时，我能够收到通知。
以前我也在测试其他 android 项目，但只在 1 台带有本地服务器的设备上测试并且成功。所以，我对此感到非常困惑。
对不起，英语不好。希望你们都能理解我的问题。
首先添加以下内容：
compile 'com.google.android.gms:play-services-ads:8.3.0'
compile 'com.google.android.gms:play-services-analytics:8.3.0'
compile 'com.google.android.gms:play-services-base:8.3.0'
compile 'com.google.android.gms:play-services-gcm:8.3.0'
compile 'com.google.android.gms:play-services-plus:8.3.0'
之后获取GCM注册ID。为此，请使用以下代码：
public class StartActivity extends AppCompatActivity implements View.OnClickListener {
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
private SharedPreferences sharedpreferences;
private GoogleCloudMessaging gcm;
static String regId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start);
sharedpreferences = PreferenceManager.getDefaultSharedPreferences(this);
}
@Override
protected void onResume() {
super.onResume();
doGCMRegistration();
}
private void doGCMRegistration() {
if (checkPlayServices()) {
gcm = GoogleCloudMessaging.getInstance(this);
regId = sharedpreferences.getString("registration_id", null);
if (regId == null || regId.isEmpty()) {
getGCMRegisterIdInBackground();
}
}
}
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
finish();
}
return false;
}
return true;
}
public void getGCMRegisterIdInBackground() {
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
try {
if (gcm == null) {
gcm = GoogleCloudMessaging.getInstance(getApplicationContext());
}
sharedpreferences.edit().putString("registration_id", gcm.register(<Sender ID>)).apply();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}.execute(null, null, null);
}
}
并在下面用于接收消息：
public class NotificationService extends IntentService {
private Handler handler;
private SharedPreferences sharedpreferences;
public static final String NOTIFICATION = "notification";
public static final byte CHAT_NOTIFICATION_ID = 0;
public NotificationService() {
super("NotificationService");
setIntentRedelivery(true);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
handler = new Handler();
sharedpreferences = PreferenceManager.getDefaultSharedPreferences(this);
}
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
String message = extras.getString("message");
int id = sharedpreferences.getInt(Constants.NOTIFICATION_ID, 0);
sharedpreferences.edit().putString(NOTIFICATION + id, message).apply();
sharedpreferences.edit().putInt(Constants.NOTIFICATION_ID, ++id).apply();
showToast();
BroadcastReceiver.completeWakefulIntent(intent);
}
public void showToast() {
handler.post(new Runnable() {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void run() {
int count = sharedpreferences.getInt(Constants.NOTIFICATION_ID, 0);
if (count == 0) return;
ArrayList<String> items = new ArrayList<>();
for (int i=0; i<count; i++){
items.add(sharedpreferences.getString(NOTIFICATION + i, ""));
}
Intent intent = new Intent(getApplicationContext(), ChatActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0,
intent, PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder mBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(getApplicationContext())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(getResources().getString(R.string.app_name))
.setContentText(sharedpreferences.getString(NOTIFICATION + 0, ""))
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setNumber(count)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
Intent resultIntent = new Intent(getApplicationContext(), ChatActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(getApplicationContext());
stackBuilder.addParentStack(ChatActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.setBigContentTitle(getResources().getString(R.string.app_name));
for (String event : items) {
inboxStyle.addLine(event);
}
mBuilder.setStyle(inboxStyle);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
}
});
}
}
public class BroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ComponentName comp = new ComponentName(context.getPackageName(),
NotificationService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
向清单添加权限：
<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" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
和回复：
<receiver
android:name="com.google.android.gms.gcm.GcmReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="com.example.gcm" />
</intent-filter>
</receiver>
<receiver
android:name=".GCM.BroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="com.hmkcode.android.gcm" />
</intent-filter>
</receiver>
<service android:name=".GCM.NotificationService" />
<meta-data
android:name="com.google.android.gms.version"
android:value="8298000" />