java - 在android中动态添加缩略图

Question

我正在尝试将缩略图动态添加到我的相关布局中。这是这里的代码

public void showViewOfReceipt(String fileName)
         {
             byte[] imageData = null;

             try
             {

             final int THUMBNAIL_SIZE = 64;

             FileInputStream fis = new FileInputStream(fileName);
             Bitmap imageBitmap = BitmapFactory.decodeStream(fis);

             Float width = new Float(imageBitmap.getWidth());
             Float height = new Float(imageBitmap.getHeight());
             Float ratio = width/height;
             imageBitmap = Bitmap.createScaledBitmap(imageBitmap, (int)(THUMBNAIL_SIZE * ratio), THUMBNAIL_SIZE, false);

             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
             imageData = baos.toByteArray();
             ImageView image = new ImageView(this); 

             image.setImageBitmap(imageBitmap);
             RelativeLayout layout = (RelativeLayout) findViewById(R.id.expLayout5);
             layout.addView(image); 
             }
             catch(Exception ex) {
             } 
         }

它从不显示任何内容

问候

Answer 1

更改您的以下代码行，

catch(Exception ex) 
{
} 

到，

catch(Exception ex) 
{
      e.printStack();
} 

所以，如果有的话，你会得到错误。