如何从Android Gallery回收位图:: GetView方法

Question

在图库的getView方法中， 我已下载位图并设置为Imageview并将其返回给框架。 何时何地应该回收位图？ 我不想唤醒系统垃圾回收器来清理位图。

public View getView(int position, View view, ViewGroup parent) { 
     ImageView i = new ImageView(mContext); 
     downloadFromWeb("www.blahblah.com", i); 
     i.setScaleType(ImageView.ScaleType.FIT_XY); 
     i.setLayoutParams(new Gallery.LayoutParams(mDisplayWidth, (mDisplayHeight-100))); 
     i.setBackgroundResource(mGalleryItemBackground); 
     return i; 
    } 

public downloadFromWeb(URL url, ImageView i){ 
     Bitmap bitmap = getBitmapFromWeb(url); 
     i.setImageBitmap(bitmap); 
    } 

Answer 1

You can call bitmap recycle method in onDestory method as shown below 

Bitmap mybitmap= null; 

@Override 
    protected void onDestroy() { 
     super.onDestroy(); 

     if(bm!=null) 
     mybitmap.recycle(); 

    }