Question

我创建了一个带有警报管理器和广播接收器的应用程序，我想要从主要活动到公共类的传递字符串MyScheduleReceiver扩展BroadcastReceiver（我有内部的警报管理器）然后到公共类MyStartServiceReceiver扩展BroadcastReceiver以传递数据到静态函数。 ..在主要活动中使用共享偏好从editbox保存此变量。但我不能在接收器内使用共享首选项。我怎么能这样做？

 public class MyScheduleReceiver extends BroadcastReceiver {
 public void onReceive(Context context, Intent intent) {

  int theHour = intent.getIntExtra("AlarmHour", 0);  
  int theMinute= intent.getIntExtra("AlarmMin", 0); 

AlarmManager service = (AlarmManager) context
    .getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, MyStartServiceReceiver.class);
PendingIntent pending = PendingIntent.getBroadcast(context, 0, i,
    PendingIntent.FLAG_CANCEL_CURRENT);

i.putExtra("data","1");

Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());

cal.set(Calendar.HOUR_OF_DAY, theHour);  // set user selection
cal.set(Calendar.MINUTE, theMinute); 
cal.set(Calendar.SECOND, 0);

service.set(AlarmManager.RTC_WAKEUP,
    cal.getTimeInMillis(), pending);

}


public class MyStartServiceReceiver extends BroadcastReceiver {

public void onReceive(Context context, Intent intent) {

  Intent service = new Intent(context, AlarmService.class);

 context.startService(service);

 String result = intent.getStringExtra("data");

 String msg=result;
 try {

    ArduBtTimer.sendData(msg);
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

Answer 1

试试这个：

 where u want to set value:
 i.putExtra("data",yourstring); 
 and for recieve: 
 String value = intent.getStringExtra("data");

Answer 2

我认为您应该使用BroadCastReceiver发送要保存的信息并将其保存为SP 那里。

这是一个从接收者向活动发送信息的示例：

创建一个内部类，在您希望获取数据的活动中扩展BroadcastReceiver：

private BroadcastReceiver ReceivefromService = new BroadcastReceiver(){
    @Override
    public void onReceive(Context context, Intent intent)
    {
        //get the data using the keys you entered at the service
        String IncomingSms=intent.getStringExtra("incomingSms");//
        String phoneNumber=intent.getStringExtra("incomingPhoneNumber");

    }
};

将此添加到onPause()：

@Override
protected void onPause() {
    super.onPause();
    try {
        unregisterReceiver(ReceivefromService);
    } catch (IllegalArgumentException e) {
        if (e.getMessage().contains("Receiver not registered")) {
            Log.i("TAG","Tried to unregister the reciver when it's not registered");
        }
        else
        {
            throw e;
        }
    }
}

将此添加到onResume()：

protected void onResume() {
    super.onResume();
    filter.addAction("android.intent.action.SmsReceiver");
    registerReceiver(ReceivefromService, filter);
    //the first parameter is the name of the inner class we created.
}

在接收器/服务中创建一个启动广播的意图，如下所示：

Intent i = new Intent("android.intent.action.SmsReceiver").putExtra("incomingSms", message);
i.putExtra("incomingPhoneNumber", phoneNumber);
context.sendBroadcast(i);

希望它会帮助你...

我如何通过报警管理器将字符串从主要活动传递到广播接收器？

2 个答案: