Android 音乐播放类似音乐播放器

最新推荐文章于 2021-08-19 15:22:19 发布

原创最新推荐文章于 2021-08-19 15:22:19 发布 · 648 阅读

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#Android-音乐

本文介绍了一个简单的Android音乐播放器应用程序的实现过程。该应用能够读取并播放本地音乐文件，具备基本的播放控制功能，如播放、暂停，并且通过进度条实现了音乐进度的调整。此外，还提供了一个用于时间格式转换的辅助类。

读取本地音乐文件

源代码：

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

public class MainActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;
    private SeekBar seekBar;
    private TextView tv_mian_stop;
    private TextView tv_mian_start;
    private int musicaction;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv_mian_start = (TextView) findViewById(R.id.tv_mian_start);
        tv_mian_stop = (TextView) findViewById(R.id.tv_mian_stop);
        seekBar = (SeekBar) findViewById(R.id.seekBar);


        //进度条的监听事件
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                   //改变
                 //每当进度条发生改变时tv_mian_start的值发生变化
                 //new TimeUtil().secToTime()一个外部类（时间格式转化）
                  tv_mian_start.setText(new TimeUtil().secToTime(mediaPlayer.getCurrentPosition()/1000)+"");
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                   //开始
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                   //结束
                   //获取拖动结束之后的位置
                int progrss=seekBar.getProgress();
                mediaPlayer.seekTo(progrss);
            }
        });
    }

    public void isPlay(View view){
        ImageButton imageButton= (ImageButton) view;
        if (mediaPlayer==null){
            mediaPlayer = MediaPlayer.create(this, R.raw.seve);
            mediaPlayer.start();
            //把图标修改为暂停的图标
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
            //获取音乐的总时长
            int muiscsum=mediaPlayer.getDuration();
            //设置进度条的最大值为总时长
             seekBar.setMax(muiscsum);

             //执行一个多线程的耗时操作
              new MyThread().start();

             tv_mian_stop.setText(new TimeUtil().secToTime(muiscsum/1000)+"");
        }else  if (mediaPlayer.isPlaying()){
            mediaPlayer.pause();
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else{
            mediaPlayer.start();
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }
    }


    class  MyThread extends Thread{
        @Override
        public void run() {
            super.run();
            //当进度条的当前值小于最大值时进度条发生改变
           while(seekBar.getProgress()<=seekBar.getMax()){

           //获取当前音乐播放的位置
           musicaction = mediaPlayer.getCurrentPosition();
            //让进度条动起来
          seekBar.setProgress(musicaction);

           }

        }
    }


}

时间格式转化类：

public class TimeUtil {

    public static String secToTime(int time) {
        String timeStr = null;
        int hour = 0;
        int minute = 0;
        int second = 0;
        if (time <= 0)
            return "00:00";
        else {
            minute = time / 60;
            if (minute < 60) {
                second = time % 60;
                timeStr = unitFormat(minute) + ":" + unitFormat(second);
            } else {
                hour = minute / 60;
                if (hour > 99)
                    return "99:59:59";
                minute = minute % 60;
                second = time - hour * 3600 - minute * 60;
                timeStr = unitFormat(hour) + ":" + unitFormat(minute) + ":" + unitFormat(second);
            }
        }
        return timeStr;
    }

    private static String unitFormat(int i) {
        String retStr = null;
        if (i >= 0 && i < 10)
            retStr = "0" + Integer.toString(i);
        else
            retStr = "" + i;
        return retStr;
    }

}