毕加索 - 加载图像到适配器

Question

我想加载图像的ImageButton进入适配器一个ImageButton，这有时不工作...我有4项，有时候，按钮图像只是加载2适配器而不是4次。始终只在第一次创建适配器的......之后屏幕旋转左右，一切正常。但在第一显示器上，它不能正常工作...

具有4行的适配器调用2次准备并加载仅在第一个创造两次......

以下是我的适配器的getView：

@Override 
public View getView(final int position, View convertView, ViewGroup parent) 
{ 
    if (convertView == null) 
     convertView = LayoutInflater.from(getContext()).inflate(R.layout.row_link, parent, false); 

    convertView.setTag(R.id.tag_pos, position); 

    ImageView iconRow = ViewHolder.get(convertView, R.id.icon); 
    final ImageButton btOpen = ViewHolder.get(convertView, R.id.btOpen); 

    // this NEVER fails 
    PicassoTools.getPicasso().load(item.getIconResId()).into(iconRow); 
    // this sometimes (at the first start) does not work reliable 
    PicassoTools.getPicasso().load(isAutoLinked ? R.drawable.linked : R.drawable.unlinked).into(new Target() 
    { 
     @Override 
     public void onPrepareLoad(Drawable d) 
     { 
      L.d(this, "BUTTON PREPARE"); 
     } 

     @Override 
     public void onBitmapLoaded(Bitmap b, LoadedFrom loadedFrom) 
     { 
      L.d(this, "BUTTON LOADED"); 
      btLink.setImageBitmap(b); 
     } 

     @Override 
     public void onBitmapFailed(Drawable d) 
     { 
      L.d(this, "BUTTON FAILED"); 
      btLink.setImageBitmap(null); 
     } 
    }); 

    return convertView; 
} 

我PicassoTools功能（我在这个班，一些额外的功能）：

public static Picasso getPicasso() 
{ 
    if (picasso == null) 
     picasso = new Picasso.Builder(MainApp.getAppContext()).memoryCache(getCache()).build(); 
    return picasso; 
} 

Answer 1

使用对象

private Target loadtarget; 

写代码getView（）

if (loadtarget == null) 
    loadtarget = new Target() { 
     @Override 
     public void onBitmapFailed(Drawable arg0) { 
     } 

     @Override 
     public void onBitmapLoaded(Bitmap bitmap, LoadedFrom from) { 
      handleLoadedBitmap(bitmap); 
     } 

     @Override 
     public void onPrepareLoad(Drawable arg0) { 

     } 
    }; 

try { 
    Picasso.with(this).load(url).into(loadtarget); 
} catch (IllegalArgumentException iae) { 
    iae.printStackTrace(); 
} 

public void handleLoadedBitmap(Bitmap b) { 
    BitmapDrawable bdrawable = new BitmapDrawable(b); 
    imageButton.setBackgroundDrawable(bdrawable); 
} 

希望这将帮助你:)