三、自定义Toast （可以播放音乐）

/**
 * 新数据Toast提示控件(带音乐播放)
 * @author liux (http://my.oschina.net/liux)
 * @version 1.0
 * @created 2012-8-30
 */
public class NewDataToast extends Toast{
    
    private MediaPlayer mPlayer;
    private boolean isSound;
    
    public NewDataToast(Context context) {
        this(context, false);
    }
    
    public NewDataToast(Context context, boolean isSound) {
        super(context);
        
        this.isSound = isSound;

        mPlayer = MediaPlayer.create(context, R.raw.newdatatoast);
　　//播放结束后立即释放播放器资源
        mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){
            @Override
            public void onCompletion(MediaPlayer mp) {
                mp.release();
            }            
        });

    }

    @Override
    public void show() {
        super.show();
        
        if(isSound){
            mPlayer.start();
        }
    }
    
    /**
     * 设置是否播放声音
     */
    public void setIsSound(boolean isSound) {
        this.isSound = isSound;
    }
    
    /**
     * 获取控件实例
     * @param context
     * @param text 提示消息
     * @param isSound 是否播放声音
     * @return
     */
    public static NewDataToast makeText(Context context, CharSequence text, boolean isSound) {
        NewDataToast result = new NewDataToast(context, isSound);
        
        LayoutInflater inflate = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        //自定义toast布局  
        View v = inflate.inflate(R.layout.new_data_toast, null);
        v.setMinimumWidth(dm.widthPixels);//设置控件最小宽度为手机屏幕宽度
        
        TextView tv = (TextView)v.findViewById(R.id.new_data_toast_message);
        tv.setText(text);
        
        result.setView(v);

        result.setDuration(600);//设置显示时间
        result.setGravity(Gravity.TOP, 0, (int)(dm.density*75));//设置toast显示位置

        return result;
    }
    
}