如何在android studio中设置音频延迟？

Question

我对这段代码的问题是我的所有音频文件同时播放。我正在尝试创建一个应用程序，该应用程序根据您在 EDITTEXT 中键入的内容播放计算出的歌曲。我需要一种方法将每个后续音符延迟一定的时间，以便它像一首歌曲一样播放......有没有办法在没有更多案例陈述的情况下做到这一点。

我的java代码：

public class MainActivity extends Activity {


EditText edit;
Button button;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    edit  = (EditText) findViewById(R.id.box);
    button  = (Button) findViewById(R.id.button);

    button.setOnClickListener(new View.OnClickListener() {


        @Override
        public void onClick(View v) {
            String string = edit.getText().toString();
            char arr[]=string.toCharArray();
            for(int i=0;i<arr.length;i++){
                switch (arr[i]) {
                    case 'a':
                        MediaPlayer mp = MediaPlayer.create(getApplicationContext(), sample);
                        mp.start();

                        break;
                    case 'b':
                        MediaPlayer mp1 = MediaPlayer.create(getApplicationContext(), sample1);
                        mp1.start();

                        break;
                    case 'c':
                        MediaPlayer mp2 = MediaPlayer.create(getApplicationContext(), sample2);
                        mp2.start();

                        break;
                    case 'd':
                        MediaPlayer mp3 = MediaPlayer.create(getApplicationContext(), sample3);
                        mp3.start();

                        break;
                    case 'e':
                        MediaPlayer mp4 = MediaPlayer.create(getApplicationContext(), sample4);
                        mp4.start();

                        break;
                    case 'f':
                        MediaPlayer mp5 = MediaPlayer.create(getApplicationContext(), sample5);
                        mp5.start();

                        break;
                    case 'g':
                        MediaPlayer mp6 = MediaPlayer.create(getApplicationContext(), sample6);
                        mp6.start();

                        break;
                    case 'h':
                        MediaPlayer mp7 = MediaPlayer.create(getApplicationContext(), sample);
                        mp7.start();

                        break;
                    case 'i':
                        MediaPlayer mp8 = MediaPlayer.create(getApplicationContext(), sample1);
                        mp8.start();

                        break;
                    case 'j':
                        MediaPlayer mp9 = MediaPlayer.create(getApplicationContext(), sample2);
                        mp9.start();

                        break;
                    case 'k':
                        MediaPlayer mp10 = MediaPlayer.create(getApplicationContext(), sample3);
                        mp10.start();

                        break;
                    case 'l':
                        MediaPlayer mp11 = MediaPlayer.create(getApplicationContext(), sample4);
                        mp11.start();

                        break;
                    case 'm':
                        MediaPlayer mp12 = MediaPlayer.create(getApplicationContext(), sample5);
                        mp12.start();

                        break;
                    case 'n':
                        MediaPlayer mp13 = MediaPlayer.create(getApplicationContext(), sample6);
                        mp13.start();

                        break;
                    case 'o':
                        MediaPlayer mp14 = MediaPlayer.create(getApplicationContext(), sample);
                        mp14.start();

                        break;
                    case 'p':
                        MediaPlayer mp15 = MediaPlayer.create(getApplicationContext(), sample1);
                        mp15.start();

                        break;
                    case 'q':
                        MediaPlayer mp16 = MediaPlayer.create(getApplicationContext(), sample2);
                        mp16.start();

                        break;
                    case 'r':
                        MediaPlayer mp17 = MediaPlayer.create(getApplicationContext(), sample3);
                        mp17.start();

                        break;
                    case 's':
                        MediaPlayer mp18 = MediaPlayer.create(getApplicationContext(), sample4);
                        mp18.start();

                        break;
                    case 't':
                        MediaPlayer mp19 = MediaPlayer.create(getApplicationContext(), sample5);
                        mp19.start();

                        break;
                    case 'u':
                        MediaPlayer mp20 = MediaPlayer.create(getApplicationContext(), sample6);
                        mp20.start();

                        break;
                    case 'v':
                        MediaPlayer mp21 = MediaPlayer.create(getApplicationContext(), sample);
                        mp21.start();

                        break;
                    case 'w':
                        MediaPlayer mp22 = MediaPlayer.create(getApplicationContext(), sample2);
                        mp22.start();

                        break;
                    case 'x':
                        MediaPlayer mp23 = MediaPlayer.create(getApplicationContext(), sample3);
                        mp23.start();

                        break;
                    case 'y':
                        MediaPlayer mp24 = MediaPlayer.create(getApplicationContext(), sample4);
                        mp24.start();

                        break;
                    case 'z':
                        MediaPlayer mp25 = MediaPlayer.create(getApplicationContext(), sample5);
                        mp25.start();

                        break;
                    case ' ':
                        MediaPlayer mp26 = MediaPlayer.create(getApplicationContext(), sample6);
                        mp26.start();

                        break;
                }

我想要一个功能，允许我在某个时间点延迟多个音频文件，这样它们就不会同时播放。谢谢！

Answer 1

使用MediaPlayer.onCompletionListener 在曲目结束时收听事件。下一个音频文件将在此之后播放。一个例子

mp.prepare();
mp1.prepare();   
mp.start();
mp.setNextMediaPlayer(mp1);

编辑

要一个接一个地播放多个音频文件，您不必一个接一个地创建嵌套的 onCompletionListener。您可以简单地创建一个包含所有要播放的音频文件并设置 onCompletionListener 的数组。一个例子：

int[] myAudio = {R.raw.audio1, R.raw.audio2, R.raw.audio3};
int mTrackFinish = 0;
MediaPlayer mp = MediaPlayer.create(this, myAudio[0]);
mp.setOnCompletionListener(new OnCompletionListener() 
{
 @Override
 public void onCompletion(MediaPlayer mp)
 {
     mTrackFinish++;
     mp.reset();
     if(mTrackFinish < myAudio.length)
            // play some audio from list
        else
          mTrackFinish=0;
          mp.release();
          mp = null;  // either set counter to 0 and start again or call end of list

    }
});
mp.start();