intent.putExtra() 未决意图不起作用

Question

我正在通过 alarmreceiver 从服务 class 传递待处理的意图。但是，在 pendingIntent 触发后，广播接收器 class 没有接收到 intent.putExtra() 信息。这是我触发 pendingIntent

的代码

Intent aint = new Intent(getApplicationContext(), AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), id, aint, PendingIntent.FLAG_UPDATE_CURRENT);
aint.putExtra("msg", msg);
aint.putExtra("phone", phone);
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);

报警接收者class在下方

public String msg, phonen;

@Override
public void  onReceive(Context context, Intent intent){
    Bundle extras = intent.getExtras();
    msg = extras.getString("msg");
    phonen = extras.getString("phone");

    Log.d("onReceive", "About to execute MyTask");
    Toast.makeText(context,msg, Toast.LENGTH_LONG).show();
}

从未决意图接收到的 toast 中的 msg 信息未显示。相反，显示的是空白吐司。

Answer 1

您必须使用 getStringExtra() 并确保字符串不为空：

     Intent intent = getIntent();    
     msg = intent.getStringExtra("msg");
     phonen = intent.getStringExtra("phone");

     if(msg!=null){
      Toast.makeText(context,msg,
        Toast.LENGTH_LONG).show();
     }

并在 PendingIntent 之前反转你的 putExtras：

   Intent aint = new Intent(getApplicationContext(), AlarmReceiver.class);
   aint.putExtra("msg", msg);
   aint.putExtra("phone", phone);
   PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), id, aint, PendingIntent.FLAG_UPDATE_CURRENT);

Answer 2

试试这个

Intent aint = new Intent(getApplicationContext(), AlarmReceiver.class);
aint.putExtra("msg", msg);
aint.putExtra("phone", phone);



PendingIntent pendingIntent = PendingIntent.getBroadcast(
    getApplicationContext(),
    id, 
    aint,
    // as stated in the comments, this flag is important!
    PendingIntent.FLAG_UPDATE_CURRENT);

Answer 3

这是因为你是先初始化Intent然后添加到PendingIntent。之后，您将有意添加信息。您应该将信息添加到意图，然后将此意图添加到 PendingIntent。

Answer 4

请记住在 PendingIntent 构造函数中放置一个唯一 ID，否则当您尝试获取 putExtra 值时可能会遇到一些奇怪的事情。

    PendingIntent pendingIntent = PendingIntent.getBroadcast(
           getApplicationContext(), 
           UUID.randomUUID().hashCode(), 
           aint, 
           PendingIntent.FLAG_UPDATE_CURRENT
    );

Answer 5

 final Intent my_intent = new Intent(this.context , Alarm_Receiver.class);

    //put in extra string into my intent
    //tell the clock that the user pressed the "alarm on button"
    my_intent.putExtra("extra" , 1);
    int state = my_intent.getExtras().getInt("extra");
    Log.i("extraa" , "the state in the main activity in alarm on Button is: " + state);

我遇到了同样的问题，我发现你应该在涉及 Intent

之前放置 putExtra

Answer 6

在我的例子中，我缺少 PendingIntent.FLAG_UPDATE_CURRENT 作为标志。

Answer 7

请使用FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT

intent.putExtra() 未决意图不起作用

intent.putExtra() in pending intent not working

android

android-intent