带进度条的android studio音乐播放器代码

以下是一个简单的带进度条的 Android 音乐播放器代码示例：

1. 首先，你需要在你的布局文件中添加一个 SeekBar 组件用于显示音乐播放进度：

<SeekBar
    android:id="@+id/seekBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    android:layout_marginBottom="16dp" />

2. 接下来，在你的 Activity 或 Fragment 中，你需要获取到 SeekBar 组件，并设置其最大值为音乐的总时长：

SeekBar seekBar = findViewById(R.id.seekBar);
int musicDuration = mediaPlayer.getDuration(); // mediaPlayer 是你的音乐播放器对象
seekBar.setMax(musicDuration);

3. 然后，在你的音乐播放器对象中，你需要添加一个监听器来更新 SeekBar 的进度：

mediaPlayer.setOnSeekBarChangeListener(new MediaPlayer.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        if (fromUser) {
            mediaPlayer.seekTo(progress);
        }
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {}

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {}
});

4. 最后，在你的音乐播放器对象中，你需要在播放音乐时更新 SeekBar 的进度：

final Handler handler = new Handler();
Runnable runnable = new Runnable() {
    @Override
    public void run() {
        int currentPosition = mediaPlayer.getCurrentPosition();
        seekBar.setProgress(currentPosition);
        handler.postDelayed(this, 1000); // 每隔1秒更新一次 SeekBar 的进度
    }
};
handler.postDelayed(runnable, 0);

完整的代码示例：

public class MainActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;
    private SeekBar seekBar;

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

        seekBar = findViewById(R.id.seekBar);

        mediaPlayer = MediaPlayer.create(this, R.raw.music);
        mediaPlayer.setLooping(true);
        mediaPlayer.seekTo(0);
        int musicDuration = mediaPlayer.getDuration();
        seekBar.setMax(musicDuration);

        mediaPlayer.setOnSeekBarChangeListener(new MediaPlayer.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (fromUser) {
                    mediaPlayer.seekTo(progress);
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {}

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {}
        });

        final Handler handler = new Handler();
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                int currentPosition = mediaPlayer.getCurrentPosition();
                seekBar.setProgress(currentPosition);
                handler.postDelayed(this, 1000);
            }
        };
        handler.postDelayed(runnable, 0);

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

        Button pauseButton = findViewById(R.id.pauseButton);
        pauseButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mediaPlayer.pause();
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mediaPlayer.release();
        mediaPlayer = null;
    }
}