2
私はこれを正しく実行していると思います。私のアクティビティクラスでは、警告ダイアログが表示され、データロードは実行されますが、離れて。ここに私のAsyncTaskコードがあります：AsyncTaskがその仕事を終えた後で、どのように警告ダイアログを削除できますか
私の活動コードに続きます。
public class Worker extends AsyncTask<URL, Integer, Long>{
private Activity ne;
private ProgressDialog progressDialog;
private Handler handler;
public Worker(Handler handler, Activity ne){
this.handler = handler;
this.ne = ne;
}
protected void onPreExecute() {
progressDialog = ProgressDialog.show(ne,"", "Retrieving News Events", true);
}
protected void onProgressUpdate(Void... progress) {
}
protected void onPostExecute(Void result) {
progressDialog.dismiss();
}
/* (non-Javadoc)
* @see android.os.AsyncTask#doInBackground(Params[])
*/
@Override
protected Long doInBackground(URL... urls) {
HttpClient client = new DefaultHttpClient();
HttpGet get;
try {
get = new HttpGet(urls[0].toURI());
ResponseHandler<String> response = new BasicResponseHandler();
String responseBody = client.execute(get, response);
String page = responseBody;
Bundle data = new Bundle();
data.putString("page",page);
Message msg = new Message();
msg.setData(data);
handler.sendMessage(msg);
}
catch (Throwable t) {
Log.d("UpdateNews", "PROBLEMS");
}
return null;
}
}
public class NewsEvents extends ListActivity{
private URL JSONNewsEvents;
private ArrayList<NewsEvent> neList;
private ArrayList<String> keyWordList;
private Worker worker;
private TextView selection;
private ProgressDialog progressDialog;
static final int PROGRESS_DIALOG = 0;
public static final String KEYWORDS = "keywords";
private NewsEvents ne;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newsevents);
ne = this;
neList = new ArrayList<NewsEvent>();
selection=(TextView)findViewById(R.id.selection);
try {
JSONNewsEvents = new URL(getString(R.string.jsonnewsevents));
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
worker = new Worker(handler, this);
setListAdapter(new IconicAdapter());
getKeywords();
worker.execute(JSONNewsEvents);
}
/**
* @return
*/
public ArrayList<String> getKeywords(){
try {
InputStream fi = openFileInput(KEYWORDS);
if (fi!=null) {
ObjectInputStream in = new ObjectInputStream(fi);
keyWordList = (ArrayList<String>) in.readObject();
in.close();
}
}
catch (java.io.FileNotFoundException e) {
// that's OK, we probably haven't created it yet
}
catch (Throwable t) {
Toast
.makeText(this, "Exception: "+t.toString(), Toast.LENGTH_LONG)
.show();
}
if(keyWordList == null){
keyWordList = new ArrayList<String>();
return keyWordList;
}
return keyWordList;
}
public void onListItemClick(ListView parent, View v,
int position, long id) {
startFullNewsEvent(neList.get(position));
}
/**
* @param newsEvent
*/
public void startFullNewsEvent(NewsEvent ne) {
Intent intent = new Intent(this, FullNewsEvent.class);
intent.putExtra("ne", ne);
this.startActivity(intent);
finish();
}
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
String page = msg.getData().getString("page");
try {
JSONArray parseArray = new JSONArray(page);
for (int i = 0; i < parseArray.length(); i++) {
JSONObject jo = parseArray.getJSONObject(i);
String title = jo.getString("title");
String body =jo.getString("body");
String pd = jo.getString("postDate");
String id = jo.getString("id");
NewsEvent ne = new NewsEvent(title, pd , body, id);
boolean unique = true;
for(NewsEvent ne0 : neList){
if(ne.getId().equals(ne0.getId())){
unique = false;
}else{
unique = true;
}
}
if(unique == true){
neList.add(ne);
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ne.setListAdapter(new IconicAdapter());
}
};
public class IconicAdapter extends ArrayAdapter<NewsEvent> {
IconicAdapter() {
super(NewsEvents.this, R.layout.rownews, neList);
}
public View getView(int position, View convertView,ViewGroup parent) {
LayoutInflater inflater=getLayoutInflater();
View row=inflater.inflate(R.layout.rownews, parent, false);
TextView label=(TextView)row.findViewById(R.id.label);
ImageView image= (ImageView)row.findViewById(R.id.icon);
String body = neList.get(position).getBody();
body.replaceAll("\\<.*?>", "");
String title = neList.get(position).getTitle();
for(String s : keyWordList){
if(body.contains(s) || body.contains(s.toLowerCase()) ||
title.contains(s) || title.contains(s.toLowerCase())){
neList.get(position).setInterested(true);
}
}
if(neList.get(position).isInterested() == true){
image.setImageResource(R.drawable.star);
}
label.setText(neList.get(position).getTitle());
return(row);
}
}
}
ありがとうございました。ここで何が起こっているのか理解してもらえますか？私は正しい値を返すことがなかったのか？ – NickTFried
こんにちは。問題は、@Overrideアノテーションを指定しないと、コンパイラはメソッドの独自の実装を提供したことを知りません。次に、メソッドのAsyncTask実装を呼び出そうとしますが、これは明らかに意図したとおりに行われません。 –