我如何将字符串从主要活动传递到带有警报管理器的广播接收器？

Posted 2023-02-16

【中文标题】我如何将字符串从主要活动传递到带有警报管理器的广播接收器？

【英文标题】：How i pass string from main activity to broadcast receiver with alarm manager?

【发布时间】：2013-01-30 11:21:23

【问题描述】：

我创建了一个带有警报管理器和广播接收器的应用程序，我想将字符串从主要活动传递到公共类 MyScheduleReceiver 扩展 BroadcastReceiver（我在里面有警报管理器），然后到公共类 MyStartServiceReceiver 扩展 BroadcastReceiver 以将数据传递给静态函数.. ..在主要活动中，使用共享首选项从编辑框中保存此变量。但我不能在接收器中使用共享首选项。我该怎么做？

 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();

【问题讨论】：

你必须在待处理的意图中添加字符串值并从接收时获取该值

我该怎么做？一些代码？

你已经完成了意图并在接收器中接收

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

在你将它传递给 PendingIntent 之前，我需要将附加内容添加到 Intent 中

【参考方案1】：

试试这个：

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

【参考方案2】：

我认为您应该使用 BroadCastReceiver 发送要保存的信息并使用 SP 保存 在那里。

这是一个从接收者向活动发送信息的示例：

在您想要获取数据的活动中创建一个扩展 BroadcastReceiver 的内部类：

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/服务中创建一个意图，像这样开始广播：

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

希望对你有所帮助...