尝试获取有关如何使用下面代码中提到的 url 中的所有标签的信息。
公共类 YoutubeVideoMain 扩展 Activity {
ListView videolist;
ArrayList<String> videoArrayList = new ArrayList<String>();
ArrayAdapter<String> videoadapter;
Context context;
String feedURL = "https://gdata.youtube.com/feeds/api/users/twistedequations/uploads?v=2&alt=jsonc&start-index=1&max-results=5";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = this;
setContentView(R.layout.youtubelist);
videolist = (ListView) findViewById(R.id.videolist);
videoadapter = new ArrayAdapter<String>(this, R.layout.video_list_item,
videoArrayList);
videolist.setAdapter(videoadapter);
VideoListTask loadertask = new VideoListTask();
loadertask.execute();
}
private class VideoListTask extends AsyncTask<Void, String, Void> {
ProgressDialog dialogue;
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
dialogue.dismiss();
videoadapter.notifyDataSetChanged();
}
@Override
protected void onPreExecute() {
dialogue = new ProgressDialog(context);
dialogue.setTitle("Loading items..");
dialogue.show();
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
HttpClient client = new DefaultHttpClient();
HttpGet getRequest = new HttpGet(feedURL);
try {
HttpResponse response = client.execute(getRequest);
StatusLine statusline = response.getStatusLine();
int statuscode = statusline.getStatusCode();
if (statuscode != 200) {
return null;
}
InputStream jsonStream = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(jsonStream));
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
String jsonData = builder.toString();
JSONObject json = new JSONObject(jsonData);
JSONObject data = json.getJSONObject("data");
JSONArray items = data.getJSONArray("items");
for (int i = 0; i < items.length(); i++) {
JSONObject video = items.getJSONObject(i);
videoArrayList.add(video.getString("title"));
}
Log.i("YouJsonData:", jsonData);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
我正在尝试在列表视图中获取缩略图,并尝试在单击任何项目时打开一个新的视频播放器。上面的代码显示了带有视频标题的项目列表,但我还想为其添加缩略图。
帮我解决这个问题。