Question

您好我正在开发一个Android短信应用程序，我在活动中使用广播接收器，参考以下链接，

我试过这段代码

public class Myapp extends Activity 
{
  BroadcastReceiver sendBroadcastReceiver= new sentReceiver();

    protected void onCreate(Bundle savedInstanceState) 
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activtiy_main);


    }

   public void onClick(View v)
  {
    if(v.getId()==sendmsg.getId())
    {

        sendSMS(phoneNumber,message);

    }

 @Override
  protected void onDestroy() 
  {
    super.onDestroy();
    try
    {
        unregisterReceiver(sendBroadcastReceiver);
    }
    catch (Exception e)
    {
         e.printStackTrace();
    }
  }
     //unregistering Receiver even in onPause()

  private void sendSMS(String phoneNumber, String message)
  {
    String SENT = "SMS_SENT";
    PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(SENT), 0);
    registerReceiver(sendBroadcastReceiver, new IntentFilter(SENT));

    SmsManager sms = SmsManager.getDefault();
    sms.sendTextMessage(phoneNumber, null, message, sentPI, null);

  }
  class sentReceiver extends BroadcastReceiver 
  {
    @Override
    public void onReceive(Context context, Intent arg1)

    {
        switch (getResultCode()) 

        {
        case Activity.RESULT_OK:
            Toast.makeText(getBaseContext(), "sms_sent", Toast.LENGTH_SHORT).show();
             startActivity(new Intent(Myapp.this, Sm.class));
             break;
        case SmsManager.RESULT_ERROR_NO_SERVICE:
            Toast.makeText(getBaseContext(), "No service",Toast.LENGTH_SHORT).show();
            Log.e("No service","");
            break;
        }
     }                  

   }

}

但我收到警告

java.lang.IllegalArgumentException: Receiver not registered: com.example.Myapp$Receiver@40593ab8

我不知道如何在清单中注册接收器。请建议。谢谢！

Answer 1

1。您正在使用

以编程方式注册接收方

registerReceiver(sendBroadcastReceiver, new IntentFilter(SENT));

所以没有必要将它添加到Manifest中。

2. 您有一个名为“sentReceiver”的自定义BroadcastReceiver类，因此在实例化时应使用此objecttype。

所以你需要改变

BroadcastReceiver sendBroadcastReceiver= new sentReceiver();

到

SentReceiver sendBroadcastReceiver = new sentReceiver();

3。我认为你是在错误地命令你的东西。这样接收器就不应该准备好听了。

Answer 2

您需要在活动的oncreate方法中实例化sendBroadcastReceiver。这将允许在调用ondestroy方法并且接收器未被您的代码注册后“重新注册”。正如Bofredo所说，使用自定义calss进行实例化。

活动中的广播接收器

2 个答案: