musiclist.java

7个Android应用程序源代码

package com.yarin.android.MusicPlayer;

import android.app.ListActivity;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;

public class MusicList extends ListActivity
{
    private MusicPlayerService mMusicPlayerService = null;
    private MusicInfoController mMusicInfoController = null;
    private Cursor mCursor = null;
    
    private TextView mTextView = null;
    private Button mPlayPauseButton = null;
    private Button mStopButton = null;
    private ServiceConnection mPlaybackConnection = new ServiceConnection() 
    {
        public void onServiceConnected(ComponentName className, IBinder service) 
        {  
        	mMusicPlayerService = ((MusicPlayerService.LocalBinder)service).getService();
        }
        public void onServiceDisconnected(ComponentName className) 
        {
        	mMusicPlayerService = null;
        }
    };
    
    protected BroadcastReceiver mPlayerEvtReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(MusicPlayerService.PLAYER_PREPARE_END)) {
                // will begin to play
                mTextView.setVisibility(View.INVISIBLE);
                mPlayPauseButton.setVisibility(View.VISIBLE);
                mStopButton.setVisibility(View.VISIBLE);
                
                mPlayPauseButton.setText(R.string.pause);
            } else if(action.equals(MusicPlayerService.PLAY_COMPLETED)) {
                mPlayPauseButton.setText(R.string.play);
            }
        }
    };
    
    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_layout);
        
        MusicPlayerApp musicPlayerApp=(MusicPlayerApp)getApplication();
        mMusicInfoController = (musicPlayerApp).getMusicInfoController();
        
        // bind playback service
        startService(new Intent(this,MusicPlayerService.class));        
        bindService(new Intent(this,MusicPlayerService.class), mPlaybackConnection, Context.BIND_AUTO_CREATE);
   
        
        mTextView = (TextView)findViewById(R.id.show_text);
        mPlayPauseButton = (Button) findViewById(R.id.play_pause_btn);
        mStopButton = (Button) findViewById(R.id.stop_btn);
        
        mPlayPauseButton.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                if (mMusicPlayerService != null && mMusicPlayerService.isPlaying()) {
                	mMusicPlayerService.pause();
                    mPlayPauseButton.setText(R.string.play);
                } else if (mMusicPlayerService != null){
                	mMusicPlayerService.start();
                    mPlayPauseButton.setText(R.string.pause);
                }
            }
        });
        
        mStopButton.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                if (mMusicPlayerService != null ) {
                    mTextView.setVisibility(View.VISIBLE);
                    mPlayPauseButton.setVisibility(View.INVISIBLE);
                    mStopButton.setVisibility(View.INVISIBLE);
                    mMusicPlayerService.stop();
                }
            }
        });
        
        IntentFilter filter = new IntentFilter();
        filter.addAction(MusicPlayerService.PLAYER_PREPARE_END);
        filter.addAction(MusicPlayerService.PLAY_COMPLETED);
        registerReceiver(mPlayerEvtReceiver, filter);
    }

    protected void onResume() {
        super.onResume();
        mCursor = mMusicInfoController.getAllSongs();

        ListAdapter adapter = new MusicListAdapter(this, android.R.layout.simple_expandable_list_item_2, mCursor, new String[]{}, new int[]{});
        setListAdapter(adapter);
    }
    
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        
        if (mCursor == null ||mCursor.getCount() == 0) {
            return;
        }
        mCursor.moveToPosition(position);
        String url = mCursor
                       .getString(mCursor
                            .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
        mMusicPlayerService.setDataSource(url);
        mMusicPlayerService.start();
    }
}

/**********************************
 * 
 *********************************/
class MusicListAdapter extends SimpleCursorAdapter {
	
	
	public MusicListAdapter(Context context, int layout, Cursor c,
			String[] from, int[] to) {
		super(context, layout, c, from, to);
	}
	
	public void bindView(View view, Context context, Cursor cursor) {	
		
		super.bindView(view, context, cursor);
		
		TextView titleView = (TextView) view.findViewById(android.R.id.text1);
		TextView artistView = (TextView) view.findViewById(android.R.id.text2);

		titleView.setText(cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE)));

		artistView.setText(cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)));

		//int duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));		
	}
	
	public static String makeTimeString(long milliSecs) {
        StringBuffer sb = new StringBuffer();
        long m = milliSecs / (60 * 1000);
        sb.append(m < 10 ? "0" + m : m);
        sb.append(":");
        long s = (milliSecs % (60 * 1000)) / 1000;
        sb.append(s < 10 ? "0" + s : s);
        return sb.toString();
    }
}