音乐播放器3

于 2014-03-13 13:43:42 发布
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本文链接：https://blog.csdn.net/acm18810549519/article/details/21165629
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音乐播放器2只有一个activity,歌曲只在一个界面，这次要实现：有两个界面，在第一个界面点击播放列表的某个歌曲时，然后跳转到另一个界面去播放

相当于要实现两个activity之间的跳转

  转到------>                                

main1.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    android:background="@drawable/bj"
    >  
    <TextView    
        android:id="@+id/name"  
        android:layout_width="fill_parent"   
        android:layout_height="wrap_content"  
        android:text="音乐列表"
        android:textSize="30px"
        />  
     <ListView  
        android:id="@+id/list" 
        android:scrollingCache="false"
        android:fadingEdge="none"   
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent"   
        />  
</LinearLayout>

Java1 

package com.example.ki;

import java.io.File;  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.HashMap;  
import java.util.List;  
import java.util.Map;  

import android.app.Activity;  
import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.content.IntentFilter;  
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.media.MediaPlayer;  
import android.media.MediaPlayer.OnCompletionListener;  
import android.os.Bundle;  
import android.os.Environment;  
import android.os.Handler;  
import android.telephony.PhoneStateListener;  
import android.telephony.TelephonyManager;  
import android.view.View;  
import android.widget.AdapterView;  
import android.widget.Button;  
import android.widget.ListView;  
import android.widget.SeekBar;  
import android.widget.SimpleAdapter;  
import android.widget.TextView;  
import android.widget.AdapterView.OnItemClickListener;  
import android.widget.SeekBar.OnSeekBarChangeListener;  
  
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {  
    private ListView listView;  
    private List<Map<String, String>> data;  
    private int current; 
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
  
        //nameTextView = (TextView) findViewById(R.id.name);  
        //seekBar = (SeekBar) findViewById(R.id.seekBar);  
        listView = (ListView) findViewById(R.id.list); 
       // listView.setCacheColorHint(Color.TRANSPARENT);//注意这句
        //ppButton = (Button) findViewById(R.id.pp);  
       
        //显示音乐播放列表   
        generateListView();  
    }    
    private void generateListView() {  
        List<File> list = new ArrayList<File>();  
          
        //获取sdcard中的所有歌曲   
        findAll(Environment.getExternalStorageDirectory(), list);  
          
        //播放列表进行排序，字符顺序   
        Collections.sort(list);  
  
        data = new ArrayList<Map<String, String>>();  
        for (File file : list) {  
            Map<String, String> map = new HashMap<String, String>();  
            map.put("name", file.getName());  
            map.put("path", file.getAbsolutePath());  
            data.add(map);  
        }  
  
        SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item, new String[] { "name" }, new int[] { R.id.mName });  
        listView.setAdapter(adapter);  
  
        listView.setOnItemClickListener(new MyItemListener());  
    }  
  
    private final class MyItemListener implements OnItemClickListener {  
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {  
            current = position; 
            Intent intent  = new Intent();			
            intent.setClass(MainActivity.this,MainActivity2.class);
            intent.putExtra("current",current);
			startActivity(intent);
           
        }  
    }  
   
    private void findAll(File file, List<File> list) {  
        File[] subFiles = file.listFiles();  
        if (subFiles != null)  
            for (File subFile : subFiles) {  
                if (subFile.isFile() && subFile.getName().endsWith(".mp3"))  
                    list.add(subFile);  
                else if (subFile.isDirectory())//如果是目录   
                    findAll(subFile, list); //递归   
            }  
    }  
}

main2.xml 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RelativeLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bj"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/name2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerInParent="true"
        android:singleLine="true" 
  		android:ellipsize="marquee" 
		android:marqueeRepeatLimit="marquee_forever" 
		android:focusable="true" 
		android:focusableInTouchMode="true" 
        android:textColor="@android:color/black"
        android:textSize="16sp" />

    <ImageView
        android:id = "@+id/image"
        android:layout_below="@id/name2"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
		android:layout_marginTop="10dp"
		android:src="@drawable/qiao"
		android:layout_gravity="center_horizontal"
	/>
     <SeekBar
        android:id="@+id/seekBar2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:layout_below="@id/image" />
    <RelativeLayout
        android:id="@+id/BT"
        android:layout_below="@id/image"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:background="@drawable/previous"
            android:layout_alignParentBottom="true"
            android:onClick="previous2" />

        <Button
            android:id="@+id/play2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:background="@drawable/play"
            android:layout_alignParentBottom="true"
            android:onClick="pp2" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:background="@drawable/next"
            android:layout_alignParentBottom="true"
            android:onClick="next2" />
    </RelativeLayout>

   
    
</RelativeLayout>

Java2 

package com.example.ki;

import java.io.File;  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.HashMap;  
import java.util.List;  
import java.util.Map;  


import android.app.Activity;  
import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.content.IntentFilter;  
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.media.MediaPlayer;  
import android.media.MediaPlayer.OnCompletionListener;  
import android.os.Bundle;  
import android.os.Environment;  
import android.os.Handler;  
import android.telephony.PhoneStateListener;  
import android.telephony.TelephonyManager;  
import android.view.View;  
import android.widget.AdapterView;  
import android.widget.Button;  
import android.widget.ListView;  
import android.widget.SeekBar;  
import android.widget.SimpleAdapter;  
import android.widget.TextView;  
import android.widget.AdapterView.OnItemClickListener;  
import android.widget.SeekBar.OnSeekBarChangeListener;  
  
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity2 extends Activity {  
    private TextView nameTextView;  
    private SeekBar seekBar2; 
    private List<Map<String, String>> data;  
    private int current2;  
    private MediaPlayer player2;  
    private Handler handler = new Handler();  
    private Button ppButton2; 
    private boolean isPause;  
    private boolean isStartTrackingTouch;  
    int kk=0;
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main2);  
  
        nameTextView = (TextView) findViewById(R.id.name2);  
        seekBar2 = (SeekBar) findViewById(R.id.seekBar2);  
        ppButton2 = (Button) findViewById(R.id.play2);  
         
        //生成一个歌曲列表
        generateListView();
        //创建一个音乐播放器   
      
        player2 = new MediaPlayer(); 
        current2 = (int) getIntent().getIntExtra("current", -1);
        play();
  
        //进度条监听器   
        seekBar2.setOnSeekBarChangeListener(new MySeekBarListener ());  
          
        //播放器监听器   
        player2.setOnCompletionListener(new MyPlayerListener()); 
    }  
    private final class MyPlayerListener implements OnCompletionListener {  
        //歌曲播放完后自动播放下一首歌曲   
        public void onCompletion(MediaPlayer mp) {  
            next2();  
        }  
    }  
  
    public void next2(View view) {  
        next2();  
    }  
  
      
    public void previous2(View view) {  
        previous2();  
    }  
  
      
    private void previous2() {  
        current2 = current2 - 1 < 0 ? data.size() - 1 : current2 - 1;  
        play();  
    }  
  
      
    private void next2() {  
        current2 = (current2 + 1) % data.size();  
        play();  
    }  
  
      
    private final class MySeekBarListener implements OnSeekBarChangeListener {  
        //移动触发   
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {  
        }  
  
        //起始触发   
        public void onStartTrackingTouch(SeekBar seekBar) {  
            isStartTrackingTouch = true;  
        }  
  
        //结束触发   
        public void onStopTrackingTouch(SeekBar seekBar) {  
            player2.seekTo(seekBar.getProgress());  
            isStartTrackingTouch = false;  
        }  
    }  
    private void play() {  
        try {  
            //重播   
            player2.reset();  
              
            //获取歌曲路径  
            
            player2.setDataSource(data.get(current2).get("path"));  
            
            //缓冲   
            player2.prepare();  
            
            //开始播放   
            player2.start();  
              
            //显示歌名   
            nameTextView.setText(data.get(current2).get("name"));  
                 
            //设置进度条长度   
            seekBar2.setMax(player2.getDuration());  //得到音频的长度
  
            //播放按钮样式   
            //ppButton.setText("播放");
            ppButton2.setBackgroundResource(R.drawable.play_queue);//显示播放
            kk=1;
            //发送一个Runnable, handler收到之后就会执行run()方法   
            handler.post(new Runnable() {  
                public void run() {  
                    // 更新进度条状态   
                    if (!isStartTrackingTouch)  
                        seekBar2.setProgress(player2.getCurrentPosition());  
                    // 1秒之后再次发送   
                    handler.postDelayed(this, 1000);  
                }  
            });  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    } 
    private void generateListView() {  
        List<File> list = new ArrayList<File>();  
          
        //获取sdcard中的所有歌曲   
        findAll(Environment.getExternalStorageDirectory(), list);  
          
        //播放列表进行排序，字符顺序   
        Collections.sort(list);  
  
        data = new ArrayList<Map<String, String>>();  
        for (File file : list) {  
            Map<String, String> map = new HashMap<String, String>();  
            map.put("name", file.getName());  
            map.put("path", file.getAbsolutePath());  
            data.add(map);  
        }  
    }  
    private void findAll(File file, List<File> list) {  
        File[] subFiles = file.listFiles();  
        if (subFiles != null)  
            for (File subFile : subFiles) {  
                if (subFile.isFile() && subFile.getName().endsWith(".mp3"))  
                    list.add(subFile);  
                else if (subFile.isDirectory())//如果是目录   
                    findAll(subFile, list); //递归   
            }  
    }  
    public void pp2(View view) {  
          
        //默认从第一首歌曲开始播放   
        if (!player2.isPlaying() && !isPause) {  
            play();  
            return;  
        }  
  
        Button button = (Button) view;
        if(kk==1)
        {
        	 pause(); 
        	 button.setBackgroundResource(R.drawable.play);
        	 kk=0;
        }
        else	
        {
        	 resume();  
        	 button.setBackgroundResource(R.drawable.play_queue);
        	 kk=1;
        }
    }  
  
    private void resume() {  
        if (isPause) {  
            player2.start();  
            isPause = false;  
        }  
    }  
 
    private void pause() {  
        if (player2 != null && player2.isPlaying()) {  
            player2.pause();  
            isPause = true;  
        }  
    }  
}

item.xml 

<?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="wrap_content"  
    android:padding="10dp"  
    >  
    <TextView  
        android:id="@+id/mName"  
        android:layout_width="fill_parent"  
        android:layout_height="wrap_content"  
        android:textSize="15sp"  
        />  
</LinearLayout>

在AndroidManifest.xml里加这个




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