java - 如何在BroadcastReceiver和main方法之间传递信息

Question

在 SMS 应用程序中，我想将 String 值从 BroadcastReceiver 传递到 main 方法。

public class LucesAlarma extends AppCompatActivity {

IntentFilter intentFilterLA;

    private BroadcastReceiver intentRecieverLA = new BroadcastReceiver()
        {
            @Override
            public void onReceive(Context context, Intent intent)
            {

                final String MENSAJE = intent.getExtras().getString("mensaje");
                String NUMERODELMENSAJE  = intent.getExtras().getString("numero");
            }
        };

    @Override
        protected void onCreate(Bundle savedInstanceState)

        {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_luces_alarma);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    intentFilterLA = new IntentFilter();
    intentFilterLA.addAction("SMS_RECEIVED_ACTION");
          //I want to use the String Mensaje from the BroadcastReceiver  here
        }

@Override
protected void onResume()
{
    registerReceiver(intentRecieverLA, intentFilterLA);
    super.onResume();
}

@Override
protected void onPause()
{
    unregisterReceiver(intentRecieverLA);
    super.onPause();
}

}

这是短信接收器代码

public class ReceptorSMS extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent)
    {
        Bundle bundle = intent.getExtras();
        SmsMessage[]messages=null;
        String str = "";
        String num = "";
        String men = "";
        if(bundle != null)
        {
            Object[] pdus = (Object[]) bundle.get("pdus");
            assert pdus != null;
            messages = new SmsMessage[pdus.length];
            for (int i=0 ; i<messages.length;i++)
            {
                messages[i]=SmsMessage.createFromPdu((byte[])pdus[i]);
                num = messages[i].getDisplayOriginatingAddress();
                str += "Mensaje de" +messages[i].getOriginatingAddress();
                str += ":";
                str += messages[i].getMessageBody();
                str += "\n";
                men = messages[i].getMessageBody();

            }
            //           Toast.makeText(context,str,Toast.LENGTH_SHORT).show();
            Intent broadcastIntent = new Intent();
            broadcastIntent.setAction("SMS_RECEIVED_ACTION");
            broadcastIntent.putExtra("sms", str);
            broadcastIntent.putExtra("mensaje", men);
            broadcastIntent.putExtra("numero", num);
            context.sendBroadcast(broadcastIntent);
        }


    }
}

我想知道如何将该字符串放入主要方法中。

Answer 1

我假设您希望在收到任何短信时开始 Activity ，而不是这样做

在您的ReceptorSMS 类中

public void onReceive(Context context, Intent intent)
{.
 .
 .
        Toast.makeText(context,str,Toast.LENGTH_SHORT).show();
        Intent broadcastIntent = new Intent();
        broadcastIntent .setClassName("<YOUR PACKAGE NAME>", "<YOUR PACKAGE NAME>.LucesAlarma");
        broadcastIntent.setAction("SMS_RECEIVED_ACTION");
        broadcastIntent.putExtra("sms", str);
        broadcastIntent.putExtra("mensaje", men);
        broadcastIntent.putExtra("numero", num);
        context.startActivity(broadcastIntent);
    }

之后在onCreate

Intent intent = getIntent();
String sms= intent.getStringExtra("sms");
String men = intent.getStringExtra("mensaje");
String num = intent.getStringExtra("numero");