Question

我的应用程序中有一个活动，它在收到特定关键字作为消息时会发出蜂鸣声，但我的代码根本不起作用。根据Logcat，它会收到消息。

 public class SmsReceiver extends BroadcastReceiver{
     int k=0;
     public static final String SMS_EXTRA_NAME ="pdus";
     MediaPlayer mPlay = new MediaPlayer();
     public void onReceive( Context context, Intent intent ) 
     {
         // Get the SMS map from Intent
         Bundle extras = intent.getExtras();
        String body="";
    SharedPreferences myPrefs = context.getSharedPreferences("test", Context.MODE_PRIVATE);
    String password = myPrefs.getString("password", "a");
    String find = "find "+password;
    mPlay.create(context, R.raw.music);
    AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    am.setStreamVolume(AudioManager.STREAM_MUSIC, am.getStreamMaxVolume(AudioManager.STREAM_MUSIC), 0);
    mPlay.setAudioStreamType(AudioManager.STREAM_MUSIC);

    if ( extras != null )
    {
        // Get received SMS array
        Object[] smsExtra = (Object[]) extras.get( SMS_EXTRA_NAME );

        for ( int i = 0; i < smsExtra.length; ++i )
        {
            SmsMessage sms = SmsMessage.createFromPdu((byte[])smsExtra[i]);

            body = sms.getMessageBody().toString();                   
            if(body.equalsIgnoreCase(find)){
                this.abortBroadcast();
                int dur = mPlay.getDuration();
                for(int j=0; ;j+=dur)
                {
                    if(k==1) break;
                    mPlay.start();
                    try
                    {
                        Thread.sleep(dur);
                    }
                    catch (InterruptedException e)
                    {}
                }
            }

             }
         }
    }

@Override
public void onKeyDown(){
    k=1;
}

public void onDestroy(){
    mPlay.stop();
    mPlay.release();
    }
    }

Answer 1

你有没有设置

<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />

然后这就是我所做的

public class SmsReceiver extends BroadcastReceiver {

    private Context cont;

    @Override
    public void onReceive(Context context, Intent intent) {
        cont = context;
        Bundle extras = intent.getExtras();

        if (extras != null) {
            Object[] smsExtra = (Object[]) extras.get("pdus");
            SmsMessage sms = SmsMessage.createFromPdu((byte[])smsExtra[0]);
            String phoneNumber = sms.getOriginatingAddress();
            String body = sms.getMessageBody().toString();
            if (body.equalsIgnoreCase("something")) {
                // do your stuff
            }
        }
    }
}

如果这不能解答您的问题，请告诉我们什么不起作用。

Answer 2

另一个改进是为你的循环做这个：

mp = MediaPlayer.create(context, R.raw.music);
mp.setOnCompletionListener(new OnCompletionListener() {
   @Override
   public void onCompletion(MediaPlayer mp) {
      mp.start();
   }
});   
mp.start();

无法使用广播接收器执行操作

2 个答案: