Question

我试图注册两个接收器，一个将通过GCM从我的应用服务器接收消息，另一个将从我的服务器加载消息。

所有这些都在名为 ChatActivity

的活动中

private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        d("Broadcast received FROM MMESSAGERECEIVER");
        Toast.makeText(context, "mMessageReceiver started", Toast.LENGTH_LONG).show();
        if(cust != null && adapter != null){
            SharedPreferences sharedPref = ChatActivity.this.getSharedPreferences(PREFERENCES_FILE, Context.MODE_PRIVATE);
            long userID = sharedPref.getLong(AllSystems.PREFERENCES_KEY_LOGGED_IN_USER_ID, -1);
            // Extract data included in the Intent
            String message = intent.getStringExtra("message");
            String dateCreated = intent.getStringExtra("dateCreated");
            Date d = new Date(Long.parseLong(dateCreated));
            long senderId = Long.parseLong(intent.getStringExtra("senderId"));
            Toast.makeText(context, "mMessageReceiver in the first if", Toast.LENGTH_LONG).show();
            if(senderId == userID || senderId == cust.getId()){
                Toast.makeText(context, "mMessageReceiver in the second if", Toast.LENGTH_LONG).show();
                adapter.add(new ChatMessageData(senderId == cust.getId(), message, new DateTime(d)));
                Bundle results = getResultExtras(true);
                results.putBoolean(INTERCEPTED, true);
                playSound();
            }
        }
    }
};

private BroadcastReceiver mLoadedReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        d("Broadcast received");
        d("Conversation loaded broadcast received");
        if(task != null && cust != null){
            d("Contact and task not null");
            long contactId = intent.getLongExtra("contactId", -1);
            if(contactId == cust.getId()){
                d("Executing conversation loading task");
                    task.execute();
            }
        }
    }
};

private void playSound(){
    try {
        Uri notification = Uri.parse("android.resource://com.me.myapp/" + R.raw.notif);
        Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
        r.play();
    } catch (Exception e) {
        e.printStackTrace();
    }
}


@Override
protected void onResume() {
    super.onResume();
    registerReceiver(mMessageReceiver, new IntentFilter("com.google.android.c2dm.intent.RECEIVE"));
    LocalBroadcastManager.getInstance(this).registerReceiver(mLoadedReceiver, loadedFilter);
}


//Must unregister onPause()
@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(mMessageReceiver);
    LocalBroadcastManager.getInstance(this).unregisterReceiver(mLoadedReceiver);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_chats);

    LocalBroadcastManager.getInstance(this).registerReceiver(mLoadedReceiver, loadedFilter);

    registerReceiver(mMessageReceiver,new IntentFilter("com.google.android.c2dm.intent.RECEIVE"));

}

问题

广播实例mMessageReceiver（第1行）尚未注册，因为应该在其onReceive方法中激活的对话框（Toast）未被激活。这个实例应该接收GCM消息，说明为什么我已经注册了这个`registerReceiver（mMessageReceiver，new IntentFilter（＆＃34; com.google.android.c2dm.intent.RECEIVE＆＃34;））;

问题

哪里出错了？我试图遵循Try Cloud Messaging for Android 甚至example at gitlab，但都是徒劳的。我以前的问题与此问题的关系是here。

Answer 1

您需要在清单中声明一些权限，服务和GCMReceiver，以便GCM按预期工作。

官方文档中的不同页面更深入地介绍了在Android客户端上设置的GCM。（参考here和示例here）

希望这有帮助。

以编程方式注册android中的Receivers和服务

1 个答案: