Android&简单Mp3播放

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    
    <EditText
        android:id="@+id/myPathEditText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="Please enter the path."/>
    <LinearLayout    android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">
        <Button
            android:id="@+id/startButton"
            android:text="Start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
        <Button
            android:id="@+id/stopButton"
            android:text="Stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
    </LinearLayout>
</LinearLayout>

package com.zachary.mymp3;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private Button startButton = null;
    private Button stopButton = null;
    private EditText myPathEditText = null;
    private boolean isPlaying = false;
    private String path = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        startButton = (Button)findViewById(R.id.startButton);
        stopButton = (Button)findViewById(R.id.stopButton);
        myPathEditText = (EditText)findViewById(R.id.myPathEditText);
        
        startButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                path = myPathEditText.getText().toString();
                System.out.println("Path---->"+path);
                if(!isPlaying) {
                    if(path!=null){
                        isPlaying = true;
                        Intent    intent = new Intent(MainActivity.this, MediaPlayerService.class);
                        intent.putExtra("path", path);
                        MainActivity.this.startService(intent);
                        //Toast.makeText(MainActivity.this, "MediaPlayer is Begining!", Toast.LENGTH_LONG).show();
                    }
                }
            }
            
        });
        
        stopButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(isPlaying){
                MainActivity.this.stopService(new Intent(MainActivity.this, MediaPlayerService.class));
                isPlaying = false;
                //Toast.makeText(MainActivity.this, "MediaPlayer is Stop!", Toast.LENGTH_LONG).show();
                }
            }
            
        });
        
    }

    @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;
    }

}

package com.zachary.mymp3;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class MediaPlayerService extends Service {

    private static final String TAG = "Media Player Service";
    private MediaPlayer player = null;
    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }
    
    @Override
    public void onCreate() {
        Toast.makeText(this, "MediaPlayerService Created", Toast.LENGTH_LONG).show();
        Log.i(TAG, "onCreate");
        System.out.println("onCreate");
    }
    
    @Override
    public void onStart(Intent intent, int startId) {
        Toast.makeText(this, "MediaPlayerService Start", Toast.LENGTH_LONG).show();
        
        String path = intent.getStringExtra("path");
        //String path="http://douban.fm/?start=1466389g8675g1000388&cid=1000388";
    
            Log.i(TAG, "onStart");
            System.out.println("onStart");
            Uri playerUri = Uri.parse(path);
            if (player != null) { 
                player.stop(); 
            } 
            player = MediaPlayer.create(MediaPlayerService.this, playerUri);
            player.start();
    }
    
    @Override
    public void onDestroy() {
        super.onDestroy();
        Toast.makeText(this, "MediaPlayerService Stoped", Toast.LENGTH_LONG).show();
        Log.i(TAG, "onDestory");
        System.out.println("onDestory");
        if(player != null) {
        player.release();
        player = null;
        }
    }

}