Android图片内存优化的几点心得

  

   

    

     

    
    

     

      1 BitmapFactory.Options options = new BitmapFactory.Options(); 
     
    
   

    

     

    
    

     

      2 options.inSampleSize = 2; 
     
    
   

    

     

    
    

     

      3 Bitmap img = BitmapFactory.decodeFile("/sdcard/1.png", options);
     
    
  
 

  

   

    

     

    
    

     

      1 BitmapFactory.Options options = new BitmapFactory.Options(); 
     
    
   

    

     

    
    

     

      2 options.inPreferredConfig = Bitmap.Config.ARGB_4444; 
     
    
   

    

     

    
    

     

      3 Bitmap img = BitmapFactory.decodeFile("/sdcard/1.png", options);
     
    
  
 

  

   

    

     

    
    

     

      Matrix matrix = new Matrix(); 
     
    
   

    

     

    
    

     

      float newWidth = 200;//图片放大后的宽度
     
    
   

    

     

    
    

     

      float newHeight = 300;//图片放大后的长度
     
    
   

    

     

    
    

     

      matrix.postScale(newWidth / img.getWidth(), newHeight/ img.getHeight());
     
    
   

    

     

    
    

     

      Bitmap img1 = Bitmap.createBitmap(img, 0, 0, img.getWidth(), img.getHeight(), matrix, true);//得到放大的图片
     
    
   

    

     

    
    

     

      img2 = img1.copy(Bitmap.Config.ARGB_4444, false);//得到ARGB_4444颜色模式的图片
     
    
   

    

     

    
    

     

      img = null; 
     
    
   

    

     

    
    

     

      img1 = null;
     
    
  
 

文章来源: panda1234lee.blog.csdn.net，作者：panda1234lee，版权归原作者所有，如需转载，请联系作者。

原文链接：panda1234lee.blog.csdn.net/article/details/8677802