import java.io.File;import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*;public class MainActivity extends Activity implements OnClickListener { private Button play;
private Button pause;
private Button stop;
private MediaPlayer mediaPlayer=new MediaPlayer();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
play=(Button) findViewById(R.id.play);
pause=(Button) findViewById(R.id.pause);
stop=(Button) findViewById(R.id.stop);
initMediaPlayer();//初始化MediaPlayer
play.setOnClickListener(this);
pause.setOnClickListener(this);
stop.setOnClickListener(this);
}
private void initMediaPlayer(){
try{
File file=new File(Environment.getExternalStorageDirectory(),"music.mp3");
mediaPlayer.setDataSource(file.getPath());//指定音频文件的路径
mediaPlayer.prepare();//让MediaPlayer进入准备状态
}catch(Exception e){
e.printStackTrace();
}
} @Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.play:
if(!mediaPlayer.isPlaying()){
mediaPlayer.start();//开始播放
}
break;
case R.id.pause:
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();//暂停播放
}
break;
case R.id.stop:
if(mediaPlayer.isPlaying()){
mediaPlayer.reset();//停止播放
initMediaPlayer();
}
break;
default:
break;
}
}
@Override
protected void onDestroy(){
super.onDestroy();
if(mediaPlayer!=null){
mediaPlayer.stop();
mediaPlayer.release();
}
}
}
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*;public class MainActivity extends Activity implements OnClickListener { private Button play;
private Button pause;
private Button stop;
private MediaPlayer mediaPlayer=new MediaPlayer();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
play=(Button) findViewById(R.id.play);
pause=(Button) findViewById(R.id.pause);
stop=(Button) findViewById(R.id.stop);
initMediaPlayer();//初始化MediaPlayer
play.setOnClickListener(this);
pause.setOnClickListener(this);
stop.setOnClickListener(this);
}
private void initMediaPlayer(){
try{
File file=new File(Environment.getExternalStorageDirectory(),"music.mp3");
mediaPlayer.setDataSource(file.getPath());//指定音频文件的路径
mediaPlayer.prepare();//让MediaPlayer进入准备状态
}catch(Exception e){
e.printStackTrace();
}
} @Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.play:
if(!mediaPlayer.isPlaying()){
mediaPlayer.start();//开始播放
}
break;
case R.id.pause:
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();//暂停播放
}
break;
case R.id.stop:
if(mediaPlayer.isPlaying()){
mediaPlayer.reset();//停止播放
initMediaPlayer();
}
break;
default:
break;
}
}
@Override
protected void onDestroy(){
super.onDestroy();
if(mediaPlayer!=null){
mediaPlayer.stop();
mediaPlayer.release();
}
}
}
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