IosButton.java 文件源码

/**
 * 传入改变亮度前的bitmap，返回改变亮度后的bitmap
 * @author leibing
 * @createTime 2016/12/30
 * @lastModify 2016/12/30
 * @param srcBitmap
 * @return
 */
   @SuppressWarnings("deprecation")
public Drawable changeBrightnessBitmap(Bitmap srcBitmap){  
        Bitmap bmp = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(),    
               Config.ARGB_8888);    
       int brightness = 60 - 127;    
       ColorMatrix cMatrix = new ColorMatrix();
    // 改变亮度
       cMatrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1,    
               0, 0, brightness,
               0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 });    
       Paint paint = new Paint();    
       paint.setColorFilter(new ColorMatrixColorFilter(cMatrix));    
       Canvas canvas = new Canvas(bmp);    
       // 在Canvas上绘制一个Bitmap  
       canvas.drawBitmap(srcBitmap, 0, 0, paint);    
      return new BitmapDrawable(bmp);  
   }