Question

我试图在第一首歌完成后自动播放歌曲，问题是我不知道如何判断第一首歌的结束时间。代码在下面，我试图在mediaPlayer完成播放后播放mediaPlayer2。 MediaPlayer mediaPlayer，mediaPlayer2;

public class MainActivity extends AppCompatActivity {

    // global variable
    MediaPlayer mediaPlayer, mediaPlayer2;

    public void play(View view)
    {
        // play music if you want this to start from the beginning put this in oncreate method
        mediaPlayer.start();

        // set loop
        mediaPlayer.setLooping(true);
    }



    public void pause(View view)
    {
        // pause music
        mediaPlayer.pause();
    }


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

        // create media player variable and link it to the music you want
        mediaPlayer = MediaPlayer.create(this, R.raw.a);

        mediaPlayer2 = MediaPlayer.create(this, R.raw.b);

    }
}

Answer 1

mediaPlayer.setOnCompletionListner(New OnCompletionListener {

@Override
public void onCompletion(MediaPlayer mp) {

//addyourcodehere

  } 
   )};

Answer 2

设置OnCompletionListener可以帮助您 https://developer.android.com/reference/android/media/MediaPlayer.OnCompletionListener.html

#include "List.h"

template <typename T>
const T& List<T>::const_iterator::operator*() const
{
    //do stuff
}

Android工作室可帮助您检测歌曲何时完成

2 个答案: