Android 从 URL 填充 ImageView

Question

您好，我正在尝试从 URL 向 ImageView 添加图像，我已尝试将其作为位图加载，但没有显示任何内容。那么有谁知道最好的方法是什么或者我做错了什么？

这是我的代码

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    //Check Preferences which sets UI
    setContentView(R.layout.singlenews);
      TextView headerText = (TextView) findViewById(R.id.header_text);
       headerText.setText("Latest News");


     PostTask posttask;
       posttask = new PostTask();
       posttask.execute();
}

public void loadNews(){

    newsStr = getIntent().getStringExtra("singleNews");




    try {
        JSONObject obj = new JSONObject(newsStr);
        content = obj.getString("content");
          title = obj.getString("title");
          fullName = obj.getString("fullname");
          created = obj.getString("created");
        NewsImageURL = obj.getString("image_primary");
        tagline = obj.getString("tagline");

        meta = "posted by: " + fullName + " " + created;


        URL aURL = new URL("NewsImageURL");
        URLConnection conn = aURL.openConnection();
        conn.connect();
        InputStream is = conn.getInputStream();
        /* Buffered is always good for a performance plus. */
        BufferedInputStream bis = new BufferedInputStream(is);
        /* Decode url-data to a bitmap. */
         bm = BitmapFactory.decodeStream(bis);
        bis.close();
        is.close();
        /* Apply the Bitmap to the ImageView that will be returned. */






        Log.v("lc", "content=" + content);
        Log.v("lc", "title=" + title);
        Log.v("lc", "fullname=" + fullName);
        Log.v("lc", "created=" + created);
        Log.v("lc", "NewsImage=" + NewsImageURL);
        Log.v("lc", "Meta=" + meta);
        Log.v("lc", "tagline=" + tagline);







} catch 
 (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

}




public class PostTask extends AsyncTask<Void, String, Boolean> {

    @Override
    protected Boolean doInBackground(Void... params) {
        boolean result = false;
        loadNews();
        publishProgress("progress");
        return result;
    }

    protected void onProgressUpdate(String... progress) {
        StringBuilder str = new StringBuilder();
            for (int i = 1; i < progress.length; i++) {
                str.append(progress[i] + " ");

            }
    }

        @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        Log.v("BGThread", "begin fillin data");

        fillData();

        }
}

public void fillData(){

    NewsView = LayoutInflater.from(getBaseContext()).inflate(R.layout.newsdetailact,
            null);

  TextView Title = (TextView) NewsView.findViewById(R.id.NewsTitle);
  Title.setText(title);

  TextView Tagline = (TextView) NewsView.findViewById(R.id.subtitle);
  Tagline.setText(tagline);

  TextView MetaData = (TextView) NewsView.findViewById(R.id.meta);
  MetaData.setText(meta);




     ImageView NewsImage = (ImageView)NewsView.findViewById(R.id.imageView2);
     NewsImage.setImageBitmap(bm);

  TextView MainContent = (TextView) NewsView.findViewById(R.id.maintext);
  MainContent.setText(content);





  Log.v("BGThread", "Filled results");

adapter = new MergeAdapter();

adapter.addView(NewsView);


setListAdapter(adapter);


}



}

Answer 1

请使用此代码 spinet 将 url 图像转换为位图并在 ImageView 中显示。

URL url = new URL("http://image10.bizrate-images.com/resize?sq=60&uid=2216744464");
Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
imageView.setImageBitmap(bmp);

我认为它对您有帮助。

谢谢