我正在开发我的 android 应用程序。我一直在研究和尝试所有不同的方法来从我的服务器 url 中检索图像并将其显示给我的listview
using SimpleAdapter
.
下载图像代码
public Bitmap download(final String image)
{
URL myFileUrl = null;
try {
myFileUrl = new URL("http://SERVER URL/images/"+image);
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
//int length = conn.getContentLength();
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
} catch (MalformedURLException e) {
// imageLoadedHandler.sendEmptyMessage(FAILED);
} catch (IOException e) {
// imageLoadedHandler.sendEmptyMessage(FAILED);
}
return bmImg;
}
将下载的图像放入 HASHMAP
// IMAGE HASHMAP
HashMap<String, Object> map = new HashMap<String, Object>();
map.put(TAG_PHOTO, download(c.getString(TAG_PHOTO)));
applicantsList.add(map);
将解析的 JSON 数据更新到 ListView
adapter = new SimpleAdapter(
SignUpApplicantActivity.this, applicantsList,
R.layout.list_applicant, new String[] {
TAG_UID, TAG_NAME, TAG_OVERALL,
TAG_APPLY_DATETIME, TAG_PHOTO},
new int[] { R.id.applicantUid,
R.id.applicantName,
R.id.applicantOverall,
R.id.apply_datetime, R.id.list_image});
adapter.setViewBinder(new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object data,String textRepresentation)
{
if((view instanceof ImageView) & (data instanceof Bitmap))
{
ImageView iv = (ImageView) view;
Bitmap bm = (Bitmap) data;
iv.setImageBitmap(bm);
return true;
}
return false;
}
});
// updating listView
setListAdapter(adapter);
在尝试了上述方法后(我认为这是我研究中最接近的答案),图像仍然没有显示在我的应用程序中。我需要一些帮助!提前致谢!