播放器之seekBar

  1.在播放器上加入滚动条的代码如下，把goOn()放到onCreate（）里：

//进度条
	public void goOn()
	{
		seekBar.setMax(mediaPlayer.getDuration());
		new Thread(new Runnable(){
			public void run() {
				while(true){
					//获得当前播放的进度值
					seekBar.setProgress(mediaPlayer.getCurrentPosition()); 
					try {
						Thread.sleep(1000);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				} 
			}}).start(); 
	}

2.滚动条拖动播放的代码如下：将startProgressUpdate()方法放入onCreate（）里面

//拖动进度条更新
	public void startProgressUpdate(){
    	//开辟Thread 用于定期刷新SeekBar
    	DelayThread dThread = new DelayThread(100);
    	dThread.start();
    }
	
	private Handler mHandle = new Handler(){
    	@Override
    	public void handleMessage(Message msg){
    		int position = mediaPlayer.getCurrentPosition();
    		
    		int mMax = mediaPlayer.getDuration();
    		int sMax = seekBar.getMax();
    		
    		seekBar.setProgress(position*sMax/mMax);
    	}
    };
    public class DelayThread extends Thread {
    	int milliseconds;
    	
    	public DelayThread(int i){
    		milliseconds = i;
    	}
    	public void run() {
    		while(true){
    			try {
					sleep(milliseconds);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				mHandle.sendEmptyMessage(0);
    		}
    	}
    }