设置为灰度图

设置为灰度图

     
     
     
     

      
      
      
      
public Bitmap toGrayscale(Bitmap bmpOriginal){
      
      
      
      
 int width, height; 
      
      
      
      
 height = bmpOriginal.getHeight(); 
      
      
      
      
 width = bmpOriginal.getWidth();
      
      
      
      
 Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
      
      
      
      
 Canvas c = new Canvas(bmpGrayscale);
      
      
      
      
 Paint paint = new Paint(); 
      
      
      
      
 ColorMatrix cm = new ColorMatrix(); 
      
      
      
      
 cm.setSaturation(0); 
      
      
      
      
 ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm); 
      
      
      
      
 paint.setColorFilter(f); 
      
      
      
      
 c.drawBitmap(bmpOriginal, 0, 0, paint); 
      
      
      
      
 return bmpGrayscale; 
      
      
      
      
}
     
     
     
     

来自为知笔记(Wiz)