这篇，我会将如何实现进度控制和音量控制的代码进行讲解。

一、进度控制：

布局文件：

<SeekBar 
	   		android:id="@+id/seekBar"
	   		android:layout_width="fill_parent" 
	   		android:layout_height="wrap_content"	
	   		android:layout_toRightOf="@id/textViewCurTime"
	   		android:layout_toLeftOf="@id/textViewTotalTime"
	   		android:paddingLeft="5dp"
	   		android:paddingRight="5dp"
			android:max="100" 
			android:progressDrawable="@drawable/seekbar_style"  
	   		android:thumb="@drawable/seekbar_thumb"
	   		android:background="@drawable/progress_buffering" >
	   		</SeekBar>

java代码：

获得View并为它设置监听器

	mPlayProgress = (SeekBar) findViewById(R.id.seekBar);
	mPlayProgress.setOnSeekBarChangeListener(new SeekBarChangeListener());

private class SeekBarChangeListener implements OnSeekBarChangeListener {

				@Override
				public void onProgressChanged(SeekBar seekBar, int progress,
						boolean fromUser) {
					switch(seekBar.getId()) {
					case R.id.seekBar:
						if (fromUser) {
							mServiceManager.seekTo(progress); // 用户控制进度的改变
						}
						break;
					case R.id.GL_player_voice:
						// 设置音量
						am.setStreamVolume(AudioManager.STREAM_MUSIC, progress, 0);
						System.out.println("am--->" + progress);
						break;
					}
				}

下面是seekTo方法：

public boolean seekTo(int rate)
	{
		if (mMusicConnect != null)
		{
			try {
				return mMusicConnect.seekTo(rate);
			} catch (RemoteException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	
		
		return false;
	}

这样，一个进度条就完成了。

二、音量控制

布局文件：

 <RelativeLayout
            android:visibility="gone" 
            android:layout_toLeftOf="@id/buttonVolumn"
            android:layout_toRightOf="@id/buttonMode"
                
            android:id="@+id/ll_player_voice"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/player_progresslayout_bg"
             >
            <SeekBar
                android:id="@+id/GL_player_voice"
                
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:paddingLeft="5dp"
	   	android:paddingRight="5dp"
		android:progressDrawable="@drawable/seekbar_style"  
	   	android:max="15"
	   	android:background="@drawable/progress_buffering" 
                android:thumb="@drawable/voice_seekbar_thumb" />
</RelativeLayout>
			

里面那个android:visibility="gone"就是隐藏的意思，如果你对visibility不熟悉，可以参照我的博文http://blog.csdn.net/google_acmer/article/details/19342643      

那里有我详尽的解释。

java代码：

首先是声明，并获得音频服务对象

//音量调节面板显示和隐藏的动画
	    	showVoicePanelAnimation = AnimationUtils.loadAnimation(MusicPlayActivity.this, R.anim.push_up_in);
	    	hiddenVoicePanelAnimation = AnimationUtils.loadAnimation(MusicPlayActivity.this, R.anim.push_up_out);
	    		
	    	//获得系统音频管理服务对象
	    	am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
	    	currentVolume = am.getStreamVolume(AudioManager.STREAM_MUSIC);
	    	maxVolume = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
	    	GL_player_voice.setProgress(currentVolume);

接下来是隐藏面板的控制以及音量控制

//控制显示音量控制面板的动画
			public void voicePanelAnimation() {
				if(ll_player_voice.getVisibility() == View.GONE) {
					ll_player_voice.startAnimation(showVoicePanelAnimation);
					ll_player_voice.setVisibility(View.VISIBLE);
				}
				else{
					ll_player_voice.startAnimation(hiddenVoicePanelAnimation);
					ll_player_voice.setVisibility(View.GONE);
				}
			}
			private class SeekBarChangeListener implements OnSeekBarChangeListener {

				@Override
				public void onProgressChanged(SeekBar seekBar, int progress,
						boolean fromUser) {
					switch(seekBar.getId()) {
					case R.id.seekBar:
						if (fromUser) {
							mServiceManager.seekTo(progress); // 用户控制进度的改变
						}
						break;
					case R.id.GL_player_voice:
						// 设置音量
						am.setStreamVolume(AudioManager.STREAM_MUSIC, progress, 0);
						System.out.println("am--->" + progress);
						break;
					}
				}

				@Override
				public void onStartTrackingTouch(SeekBar seekBar) {

				}

				@Override
				public void onStopTrackingTouch(SeekBar seekBar) {

				}

			}