一个空图像URL可防止显示其他内容

时间:2013-01-14 07:18:35

标签: android sqlite android-widget bitmap

我可以从sqlite数据库中获取数据。但是,当我的图片网址为空时,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,因此我发现了迟到的原因

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做的任何方法,即使有一个空图像网址,它也不会阻止显示其他图像?谢谢!

1 个答案:

答案 0 :(得分:0)

resizeSignatureBitmap中,您可以在结尾处应用支票来检查要返回的bitmap天气是否为null。如果是null,您可以返回一些默认位图。

或者您只需在单独的try catch blocks中设置图片。