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我能够从 sqlite 数据库中获取数据。但是，当我的图像 url 为空时，它会阻止我的其他内容显示。

try{
                name.setText(nameString);
                school.setText(schoolString);
                psupervisor.setText(info.getPsupervisor());
                pdate.setText(info.getPdate());
                a.setChecked(Boolean.parseBoolean(info.getPtick1()));
                b.setChecked(Boolean.parseBoolean(info.getPtick2()));
                c.setChecked(Boolean.parseBoolean(info.getPtick3()));
                pcomment1.setText(info.getPcomment1());
                psignature1.setImageBitmap(resizeSignatureBitmap(info.getPsignature1()));
                pcomment2.setText(info.getPcomment2());
                psignature2.setImageBitmap(resizeSignatureBitmap(info.getPsignature2()));
                pdate2.setText(info.getPdate2());
                d.setChecked(Boolean.parseBoolean(info.getPtick4()));
                e.setChecked(Boolean.parseBoolean(info.getPtick5()));
                f.setChecked(Boolean.parseBoolean(info.getPtick6()));
                pcomment3.setText(info.getPcomment3());
                psignature3.setImageBitmap(resizeSignatureBitmap(info.getPsignature3()));
                pcomment4.setText(info.getPcomment4());
                psignature4.setImageBitmap(resizeSignatureBitmap(info.getPsignature4()));
                Log.d("PREPOST: ", log2);
                db.close();
            }
            catch(Exception ex){}

        }

例如，如果 psignature2 为 null，则不会显示从 pdate2 到 pcomment4 的项目。由于 try-catch 没有崩溃，因此我发现错误的原因很晚

我调整位图分辨率的方法：

public Bitmap resizeSignatureBitmap(String imagePath){

     BitmapFactory.Options options = new BitmapFactory.Options();
    InputStream is = null;
    try {
            is = new FileInputStream(imagePath);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    BitmapFactory.decodeStream(is,null,options);
    try {
            is.close();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    try {
            is = new FileInputStream(imagePath);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    // here w and h are the desired width and height
    options.inSampleSize = Math.max(options.outWidth/w, options.outHeight/h);
    // bitmap is the resized bitmap
    Bitmap bitmap = BitmapFactory.decodeStream(is,null,options);
    is=null;
     return bitmap;
 }

因此，任何人都可以建议我可以这样做的任何方法，即使有一个空图像 url，它也不会阻止其他图像的显示？谢谢！

4

1 回答 1

0

您可以在resizeSignatureBitmap最后应用检查以检查bitmap要返回的天气null。如果它null你可以返回一些默认位图。

或者您可以简单地将图像设置在单独的try catch blocks.

于 2013-01-14T07:26:03.010 回答