DarkFrameLayout.java

package com.BeeFramework.view;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.FrameLayout;


public class DarkFrameLayout extends FrameLayout {  
    
    /**保存当前容器原来设置的图片*/  
    private Drawable drawableSave;  
    /**高亮图片*/  
    private Drawable drawableGrap;  
      
    public DarkFrameLayout(Context context) {  
        super(context);  
        setListener();  
    }  
      
    public DarkFrameLayout(Context context, AttributeSet attrs) {  
        super(context, attrs);  
        setListener();  
    }  
  
    @Override  
    public void setBackground(Drawable drawable) {  
        this.drawableSave = drawable;  
        setSuperImageDrawable(drawable);  
    }  
  
    @Override  
    public void setBackgroundDrawable(Drawable drawable) {  
  
        this.drawableSave = drawable;  
        setSuperImageDrawable(drawable);  
    }  
      
    @Override  
    public void setBackgroundResource(int resId) {  
  
        super.setBackgroundResource(resId);  
        this.drawableSave = this.getBackground();  
    }  
    
    /**调用父类设置图片方法*/  
    private void setSuperImageDrawable(Drawable drawable) {  
       // super.setBackground(drawable);  
        super.setBackgroundDrawable(drawable);
    }  
      
    /**设置正常状态*/  
    public void setNormalState() {  
        setSuperImageDrawable(drawableSave);  
    }  
    /**设置点击状态*/  
    public void setClickedState() {  
        setDrawableGrap();//生成点击后图片  
        setSuperImageDrawable(drawableGrap);  
    }  
      
    /** 
     * 绑定事件 
     */  
    private void setListener() {  
        //鼠标事件  
        this.setOnTouchListener(new OnTouchListener() {  
              
            @Override  
            public boolean onTouch(View v, MotionEvent event) {  
  
                switch (event.getAction()) {  
                    case MotionEvent.ACTION_DOWN:   //鼠标按下  
                        setClickedState();  
                        break;  
                    case MotionEvent.ACTION_UP:     //鼠标松开  
                        setNormalState();  
                        break;  
                    case MotionEvent.ACTION_CANCEL: //取消  
                        setNormalState();  
                        break;  
                    default :  
                        break;  
                }  
                  
                return false;  
            }  
        });  
    }  
      
    private void setDrawableGrap() {  
            
            int w = this.getWidth();
            int h = this.getHeight();
  
            Config config = drawableSave.getOpacity() != PixelFormat.OPAQUE ? Config.ARGB_8888 : Config.RGB_565; //取 drawable 的颜色格式
            Bitmap bitmap = Bitmap.createBitmap(w, h, config);//建立对应 bitmap    
            Canvas canvas = new Canvas(bitmap);  //建立对应 bitmap 的画布    
            drawableSave.setBounds(0, 0, w, h);    
            drawableSave.draw(canvas); //把 drawable 内容画到画布中    
              
            int array []  = new int[w*h];  
            int n = 0;  
            for(int i=0;i<h;i++) {  
                for(int j=0;j<w;j++) {   
                    int color = bitmap.getPixel(j,i);  
                    int a = Color.alpha(color);  
                    color = Color.argb(a, 0, 0, 0); 
                    array[n] = color;  
                    n++;  
                }  
            }  
            Bitmap newBitmap = Bitmap.createBitmap(array,w,h, Config.ARGB_8888);
            
            Bitmap newb = Bitmap.createBitmap(w, h, Config.ARGB_8888);
            Canvas cv = new Canvas(newb);
    		cv.drawBitmap(bitmap, 0, 0, null);// 在 0，0坐标开始画入src
    		Paint paint = new Paint();
    		
    		if (newBitmap != null) {
    			paint.setAlpha(25); // 设置透明度
    			cv.drawBitmap(newBitmap, 0, 0 , paint);
    		}
    		
    		cv.save(Canvas.ALL_SAVE_FLAG);// 保存
    		cv.restore();// 存储
            drawableGrap = new BitmapDrawable(getResources(), newb);  

        }  
}