从图像Web使用setImageBitmap的AsyncTask的ImageView [英] AsyncTask ImageView from image web using setImageBitmap

问题描述

我有一个问题在我的互联网显示此图像。 我不知道如何使它发挥作用。 我是新来的机器人。

的问题是，部分...

  imView =（ImageView的）findViewById（R.id.imageView1）;
imView.setImageBitmap（BM）; //错误
 

感谢你。

我的code

 公共类CarregaImagem扩展的AsyncTask＆LT;字符串，太虚，字符串＆GT; {
    字符串IMAGEURL =htt​​p://www.cuboweb.com.br/android/images/logoconsulfarma.png;
    私人ProgressDialog进展情况;
    私人活动的活动;
    位图bmImg;

    公共CarregaImagem（活动活动）{
        this.activity =活动;
    }

    在preExecute保护无效（）{
        进度=新ProgressDialog（活动）;
        progress.setTitle（Aguarde ......）;
        progress.setMessage（Carregando ......）;
        progress.show（）;
    }

    保护字符串doInBackground（字符串... PARAMS）{
        // TODO自动生成方法存根
        尝试 {
            URL aURL =新的URL（IMAGEURL）;
            最后的URLConnection康恩= aURL.openConnection（）;
            conn.connect（）;
            最后的BufferedInputStream双=新的BufferedInputStream（conn.getInputStream（））;
            最后的位图BM = BitmapFactory.de codeStream（之二）;
            BitmapFactory.de codeStream（新的URL（IMAGEURL）.openConnection（）的getInputStream（））;
            bis.close（）;
        }赶上（IOException异常E）{
            IMAGEURL =;
        }赶上（例外F）{
            IMAGEURL =;
        }
        返回IMAGEURL;
    }

    保护无效onPostExecute（字符串IMAGEURL）{

        如果（！imageUrl.equals（））{
            imView =（ImageView的）findViewById（R.id.imageView1）;
            imView.setImageBitmap（BM）; //错误
        } 其他{
            Toast.makeText（活动，NAO FOIpossívelobter resultados，Toast.LENGTH_LONG）.show（）;
        }
        progress.dismiss（）;
    }
}
 

解决方案

您创建doInBackground位图，你永远不会使用。 返回代替该位图，它用在onPostExecute

I have a problem to display this image in my internet. I have no idea how to make it work. I am new to android.

The problem is that part ...

imView = (ImageView) findViewById(R.id.imageView1); 
imView.setImageBitmap(bm); //error

Thank you.

my code

public class CarregaImagem extends AsyncTask<String, Void, String>{
    String imageUrl = "http://www.cuboweb.com.br/android/images/logoconsulfarma.png";
    private ProgressDialog progress;
    private Activity activity;
    Bitmap bmImg;

    public CarregaImagem(Activity activity){
        this.activity = activity;
    }

    protected void onPreExecute() {
        progress = new ProgressDialog(activity);
        progress.setTitle("Aguarde...");
        progress.setMessage("Carregando..."); 
        progress.show();    
    }

    protected String doInBackground(String... params) { 
        // TODO Auto-generated method stub
        try { 
            URL aURL = new URL(imageUrl);
            final URLConnection conn = aURL.openConnection(); 
            conn.connect();
            final BufferedInputStream bis = new BufferedInputStream(conn.getInputStream());
            final Bitmap bm = BitmapFactory.decodeStream(bis);
            BitmapFactory.decodeStream(new URL(imageUrl).openConnection().getInputStream()); 
            bis.close();
        } catch (IOException e) { 
            imageUrl = "";
        } catch(Exception f){
            imageUrl = "";
        }
        return imageUrl;        
    }

    protected void onPostExecute(String imageUrl) {

        if(!imageUrl.equals("")){
            imView = (ImageView) findViewById(R.id.imageView1); 
            imView.setImageBitmap(bm); //error 
        } else{
            Toast.makeText(activity, "Não foi possível obter resultados", Toast.LENGTH_LONG).show();
        }           
        progress.dismiss();         
    }   
}

解决方案

You create a bitmap in doInBackground that you never use. Return instead the bitmap and use it in onPostExecute.

这篇关于从图像Web使用setImageBitmap的AsyncTask的ImageView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！