谁能告诉我如何启动mp3? [英] can anyone tell me how do I start mp3?

问题描述

我正在制作一个项目，当吐司"Fall Detected"出现20秒钟时，我需要自动启动mp3或任何响亮的声音.

I am making a project ,I need to start mp3 or any loud sound automatically when the toast "Fall Detected" appears for 20 second.

 public void onSensorChanged(SensorEvent event) 
 {
     if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) 
     {
         long curTime = System.currentTimeMillis();
         if ((curTime - mLastShakeTime) > MIN_TIME_BETWEEN_SHAKES_MILLISECS) 
         {
             float x = event.values[0];
             float y = event.values[1];
             float z = event.values[2];

             double acceleration = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2)) - SensorManager.GRAVITY_EARTH;

             Log.d("mySensor", "Acceleration is " + acceleration + "m/s^2");

             if (acceleration < -9.00f && acceleration> -15.00f ) 
             {
                 mLastShakeTime = curTime;
                 Toast.makeText(getApplicationContext(), "FALL DETECTED",
                 Toast.LENGTH_LONG).show();
             }
         }
     }
 }

推荐答案

对原始问题的澄清，听起来像是您想播放声音.在这种情况下，您需要以下内容:

Given your clarifications to the original question it sounds like you want to play a sound. In which case you want something like:

final MediaPlayer player = MediaPlayer.create(this, R.raw.alarm);
player.start();

R.raw.alarm是包含您要播放的声音的文件的资源.

R.raw.alarm is the resource for the file containing the sound you want to play.

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