android使用MediaPlayer播放音频

迈不过友情╰ 2022-08-10 13:43 174阅读 0赞

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout\_width="fill\_parent"  
    android:layout\_height="fill\_parent"  
    android:orientation="vertical"   
    android:background="@drawable/background02"  
      
    >  
   <LinearLayout  
        android:layout\_width="wrap\_content"  
        android:layout\_height="wrap\_content"  
        android:orientation="horizontal" >  
  
  
        <Button  
            android:id="@+id/button1"  
            android:layout\_width="wrap\_content"  
            android:layout\_height="wrap\_content"   
            android:text="@string/a"  
            style="?android:attr/borderlessButtonStyle"   
            />  
  
  
        <Button  
            android:id="@+id/button2"  
            android:layout\_width="wrap\_content"  
            android:layout\_height="wrap\_content"  
            android:text="@string/b"  
            style="?android:attr/borderlessButtonStyle"   
             />  
  
  
        <Button  
            android:id="@+id/button3"  
            android:layout\_width="wrap\_content"  
            android:layout\_height="wrap\_content"   
            android:text="@string/c"  
            style="?android:attr/borderlessButtonStyle"   
            />  
           
    </LinearLayout>  
 <TextView   
              android:layout\_width="wrap\_content"  
            android:layout\_height="wrap\_content"   
            android:id="@+id/hint"  
             />

</LinearLayout>

package com.example.myfirst;  
import java.io.File;  
  
  
import android.media.MediaPlayer;  
import android.media.MediaPlayer.OnCompletionListener;  
import android.net.Uri;  
import android.os.Bundle;  
import android.support.v7.app.ActionBarActivity;  
import android.view.ContextMenu;  
import android.view.ContextMenu.ContextMenuInfo;  
import android.view.Menu;  
import android.view.MenuItem;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.TextView;  
  
  
public class MainActivity extends ActionBarActivity \{  
  
  
private MediaPlayer player;  
private boolean isPause =false;  
private File file;  
private TextView hint;  
  
@Override  
protected void onCreate(Bundle savedInstanceState) \{   
super.onCreate(savedInstanceState);  
setContentView(R.layout.activity\_main);  
final Button button1=(Button)findViewById(R.id.button1);  
final Button button2=(Button)findViewById(R.id.button2);  
final Button button3=(Button)findViewById(R.id.button3);  
hint=(TextView)findViewById(R.id.hint);  
file=new File("/sdcard/ninan.mp3");  
if(file.exists())\{  
player=MediaPlayer.create(this, Uri.parse(file.getAbsolutePath()));  
\}else\{  
hint.setText("音频文件不存在");  
button1.setEnabled(false);  
return;  
\}  
  
player.setOnCompletionListener(new OnCompletionListener() \{  
  
@Override  
public void onCompletion(MediaPlayer mp) \{  
// TODO Auto-generated method stub  
play();  
\}  
\});  
button1.setOnClickListener(new OnClickListener() \{  
  
@Override  
public void onClick(View v) \{  
// TODO Auto-generated method stub  
play();  
if(isPause)\{  
button2.setText("暂停");  
isPause=false;  
\}  
button2.setEnabled(true);  
button3.setEnabled(true);  
button1.setEnabled(false);  
\}  
\});  
button2.setOnClickListener(new OnClickListener() \{  
  
@Override  
public void onClick(View v) \{  
// TODO Auto-generated method stub  
   if(player.isPlaying()&&!isPause)\{  
   player.pause();  
   isPause=true;  
   ((Button)v).setText("继续");  
   hint.setText("暂停播放音频。。。。。");  
   button1.setEnabled(true);  
   \}else\{  
   player.start();  
   ((Button)v).setText("暂停");  
   hint.setText("继续播放音频。。。");  
   isPause=false;  
   button1.setEnabled(false);  
   \}  
\}  
\});  
button3.setOnClickListener(new OnClickListener() \{  
  
@Override  
public void onClick(View v) \{  
// TODO Auto-generated method stub  
   player.stop();  
   hint.setText("停止播放。。。");  
   button2.setEnabled(false);  
   button3.setEnabled(false);  
   button1.setEnabled(true);  
\}  
\});  
\}  
private void play()\{  
try\{  
player.reset();  
player.setDataSource(file.getAbsolutePath());  
player.prepare();  
player.start();  
hint.setText("正在播放音频");  
\}catch(Exception e)\{  
e.printStackTrace();  
  
\}  
\}  
  
  
  
@Override  
protected void onDestroy() \{  
// TODO Auto-generated method stub  
if(player.isPlaying())\{  
player.stop();  
\}  
player.release();  
super.onDestroy();  
\}  
@Override  
    
public void onCreateContextMenu(ContextMenu menu, View v,  
ContextMenuInfo menuInfo) \{  
// TODO Auto-generated method stub  
  
  
  
\}  
  
@Override  
public boolean onCreateOptionsMenu(Menu menu) \{  
// Inflate the menu; this adds items to the action bar if it is present.  
//getMenuInflater().inflate(R.menu.main, menu);  
  
return true;  
  
\}  
  
  
@Override  
public boolean onOptionsItemSelected(MenuItem item) \{  
// Handle action bar item clicks here. The action bar will  
// automatically handle clicks on the Home/Up button, so long  
// as you specify a parent activity in AndroidManifest.xml.  
int id = item.getItemId();  
if (id == R.id.action\_settings) \{  
return true;  
\}  
return super.onOptionsItemSelected(item);  
\}  
  
\}