如何将此文件转换为 MP3 或它是否已定义为 MP3?

How to convert this file into an MP3 or is it already defined as MP3?

这是我的代码,但没有播放声音

MainActivity.java

public class MainActivity extends AppCompatActivity {

private MediaPlayer mediaPlayer;

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

    mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.file);

    Button playButton = (Button) findViewById(R.id.play_id);
    playButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
                mediaPlayer.start();
        }
    });

    Button pauseButton = (Button) findViewById(R.id.pause_id);
    playButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            mediaPlayer.stop();
        }
    });

}

我的代码有效,但没有播放声音。我不知道怎么了

mp3的格式也很奇怪it shows YT with black background which i don't understand.

更改您的声音文件名,"file"是保留名称!

感谢您的尝试,但这是我在这一行中的错误 playButton.setOnClickListener(new View.OnClickListener() { 应该是 pauseButton,我只是忘了更改它。谢谢