本篇文章主要借鉴于该链接：简易音乐播放器
1、导入音乐文件
在res目录下创建一个raw文件夹，把下载好的音乐文件复制进去，注意文件名不能含中文。
2、编辑布局文件
activity_main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="/apk/res/android"xmlns:app="/apk/res-auto"xmlns:tools="/tools" android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="com.example.androidplaymusic.MainActivity"><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"><SeekBarandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/sb_main_seekBar"android:layout_alignParentTop="true"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/tv_main_timeStart"android:layout_alignParentLeft="true"android:layout_below="@+id/sb_main_seekBar"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/tv_main_timeEnd"android:layout_alignParentRight="true"android:layout_below="@+id/sb_main_seekBar"/></RelativeLayout><ImageButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@android:drawable/ic_media_play"android:onClick="play"/></LinearLayout>
3、编辑MainActivity.java
MainActivity.java
package com.example.kh17_4;import android.media.MediaPlayer;import android.media.TimedMetaData;import .Uri;import android.os.Build;import android.os.Handler;//import android.support.annotation.RequiresApi;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.ImageButton;import android.widget.SeekBar;import android.widget.TextView;public class MainActivity extends AppCompatActivity {private SeekBar sb_main_seekBar;private MediaPlayer mediaPlayer;private Handler handler = new Handler();private Runnable runnable = new Runnable() {@Overridepublic void run() {//判断如果滚动条数值大小大于或者等于最大值if(sb_main_seekBar.getProgress()>=sb_main_seekBar.getMax()){handler.removeCallbacks(runnable);}//调用线程handler.post(runnable);//给seekBar和tv_main_timeStart 赋值int currentPosition = mediaPlayer.getCurrentPosition();sb_main_seekBar.setProgress(currentPosition);String time2 = timeParse(currentPosition);tv_main_timeStart.setText(time2);}};private TextView tv_main_timeStart;private TextView tv_main_timeEnd;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//获取控件idsb_main_seekBar = (SeekBar) findViewById(R.id.sb_main_seekBar);tv_main_timeStart = (TextView) findViewById(R.id.tv_main_timeStart);tv_main_timeEnd = (TextView) findViewById(R.id.tv_main_timeEnd);//设置seekBar 的监听事件sb_main_seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int i, boolean b) {}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {//设置音乐在seekBar滑动后的播放int currentPosition = seekBar.getProgress();mediaPlayer.seekTo(currentPosition);}});}//点击事件public void play(View view){ImageButton ib = (ImageButton) view;//如果音乐是第一次启动if(mediaPlayer == null){//创建一个MediaPlayermediaPlayer = MediaPlayer.create(this, R.raw.song1);//开始播放mediaPlayer.start();//改变图标ib.setImageResource(android.R.drawable.ic_media_pause);//设置mediaPlayer的监听 在调用mediaPlayer.start();后触发mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {@Overridepublic void onPrepared(MediaPlayer mediaPlayer) {//给seekBar 赋值long time = mediaPlayer.getDuration();sb_main_seekBar.setMax((int) time);Log.i("timea"," "+time);handler.post(runnable);//获取时间转换成分秒后的值String time2 = timeParse(time);tv_main_timeEnd.setText(time2);}});//如果音乐在播放}else if(mediaPlayer.isPlaying()){//停止播放mediaPlayer.pause();ib.setImageResource(android.R.drawable.ic_media_play);}else{//如果音乐停止过 则播放mediaPlayer.start();ib.setImageResource(android.R.drawable.ic_media_pause);}}//将毫秒转换成分秒public static String timeParse(long duration) {String time = "" ;long minute = duration / 60000 ;long seconds = duration % 60000 ;long second = Math.round((float)seconds/1000) ;if( minute < 10 ){time += "0" ;}time += minute+":" ;if( second < 10 ){time += "0" ;}time += second ;return time ;}}
4、运行
这个时候就可以听到刚才添加的歌曲了，可以拖动进度条调整进度。
