Question

我想创建一个音乐播放器，它将播放API中的音乐。在播放器屏幕中，有一个下一个按钮。当用户按下此按钮时，它将自动播放下一首歌曲。但是我不能播放下一首歌。

我已经尝试了一些方法。但这只会将下一首歌曲增加5-10秒。

package com.example.diu.myaudio;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

public class AudioActivity extends AppCompatActivity {

private Button backBtn, forBtn;
private Button playBtn;
private SeekBar seekbar;
private Runnable runnable;
private Handler handler;
int totaltime;

MediaPlayer player;

TextView storyname, writername;
ImageView image;
String nameStory, writerStory,link;
String imageStory;

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

    backBtn = findViewById(R.id.backbtn);
    playBtn = findViewById(R.id.playbtn);
    forBtn = findViewById(R.id.forbtn);
    handler = new Handler();
    seekbar = findViewById(R.id.seekbar);
    seekbar.setMax(totaltime);


    storyname = findViewById(R.id.audioStoryName);
    writername = findViewById(R.id.audioWriterName);
    image = findViewById(R.id.audioImage);

    nameStory = getIntent().getStringExtra("storyName");
    writerStory = getIntent().getStringExtra("writterName");
    imageStory = getIntent().getStringExtra("storyImage");
    link = getIntent().getStringExtra("storyLink");
    System.out.print(link);
    storyname.setText(nameStory);
    writername.setText(writerStory);
    Picasso.get().load(imageStory).fit().into(image);
    try{
        player=new MediaPlayer();
        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
        player.setDataSource(link);
        player.prepare();
        player.start();
        playBtn.setBackgroundResource(R.drawable.ic_pause_black_24dp);
        backBtn.setBackgroundResource(R.drawable.ic_back_black_24dp);
        forBtn.setBackgroundResource(R.drawable.ic_fast_black_24dp);
        playBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!player.isPlaying()){
                    player.start();

playBtn.setBackgroundResource(R.drawable.ic_pause_black_24dp);
                }else {
                    player.pause();

playBtn.setBackgroundResource(R.drawable.ic_play_arrow_black_24dp);
                }
            }
        });
        forBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                player.seekTo(player.getCurrentPosition()+50000);
            }
        });
        backBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                player.seekTo(player.getCurrentPosition()-50000);
            }
        });
        totaltime = player.getDuration();
    }catch(Exception e){

    }

}
}

按下下一步按钮，它将播放API中的下一首歌曲。

Answer 1

尝试以下代码：

int currentIndex = 0;

forBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            currentIndex++;  
            player.setDataSource(array.get(currentIndex));
        }
});

当用户按下下一步按钮时，播放API中的下一首音频歌曲

1 个答案: