java - BitmapFactory 无法在 Android 中解码流 : java. io.FileNotFoundException

Question

我试图从我的在线数据库中获取图片，在我的表中的数据字段“imagelink”中，我将我上传的图片的 url 放在那里，但不幸的是它给了我这个错误。

02-08 15:05:29.432  14364-14364/com.example.jithea.testlogin E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: /http:/agustiniancampusevents.site40.net/newsDB/images/Visual%20Report%20Filipino%20Final-12%20copy.JPG: open failed: ENOENT (No such file or directory)

这是我在 onPostExecute 中的代码:

 protected void onPostExecute(String file_url) {
        // dismiss the dialog after getting all products
        pDialog.dismiss();
        // updating UI from Background Thread
        runOnUiThread(new Runnable() {
            public void run() {
                /**
                 * Updating parsed JSON data into ListView
                 * */


                 ListAdapter adapter = new SimpleAdapter(
                        NewsActivity.this, productsList,
                        R.layout.news_list_item, new String[]{TAG_PID, TAG_IMAGELINK,
                        TAG_NEWSTITLE, TAG_DESCRIPTION},
                        new int[]{R.id.pid, R.id.imageView, R.id.newstitle, R.id.description});
                // updating listview
                setListAdapter(adapter);
            }
        });

    }

Answer 1

使用 BitmapFactory.decodeStream 而不是 BitmapFactory.decodeFile。

try ( InputStream is = new URL( file_url ).openStream() ) {
  Bitmap bitmap = BitmapFactory.decodeStream( is );
}