在我的应用程序中，我有 2 个 fragment ， fragment A 和 fragment B。在这两个 fragment 上，我正在做一些 XML 解析和填充 ListView 。我想为我的应用程序实现启动画面。以便它在解析和填充期间显示 ListView 并在完成时完成。为此，我创建了一个 Activity SplashActivity。我在 FragmentA 上实现了 asyntask，并在执行前部分调用了 SplashActivity。现在，当应用程序启动时，SplashActivity 开始了。但是我无法在 FragmentA 的执行后完成这个 Activity 。 getActivity().finishActivity() 不工作。请有人帮我解决这个问题，或者建议我另一种在 fragment Activity 上实现启动画面的方法。提前致谢....
这是我的 FragmentA=>
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflating layout
View v = inflater
.inflate(R.layout.headlines_fragment, container, false);
return v;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Log.i("Tag", "onCreateView");
// We set clear listener
loading = (ProgressBar) getActivity().findViewById(R.id.progressBar1);
if (Headlines.headflag == "malayalam") {
urls = "http://www.abc.com/rssfeeds/19_18_17_25/1/rss.xml";
}
if (Headlines.headflag == "english") {
urls = "http://www.abc.com/en/rssfeeds/1_2_3_5/latest/rss.xml";
}
new ProgressAsyncTask().execute();
MainActivity.refresh.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new ProgressAsyncTask().execute();
}
});
}
public void populate_listview() {
newsList = new ArrayList<HashMap<String, String>>();
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
newsList.add(map);
MarqueeStr = MarqueeStr + " *** " + Title[i];
}
}
public void StartProgress() {
new ProgressAsyncTask().execute();
}
public class ProgressAsyncTask extends AsyncTask<Void, Integer, Void> {
int myProgress;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
myProgress = 0;
Intent intent = new Intent(getActivity(), Splash.class);
startActivityForResult(intent, 5); //Here I called Splash Activity
loading.setVisibility(View.VISIBLE);
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
getActivity().finishActivity(5);// Here I tried to finish flash activity
if (Title == null) {
final AlertDialog.Builder alertbox = new AlertDialog.Builder(
getActivity());
alertbox.setMessage("Error in connection.Do you want to retry");
alertbox.setPositiveButton("retry",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// getActivity().finish();
// Intent intent = new Intent(getActivity(),
// MainActivity.class);
// startActivityForResult(intent,1);
}
});
alertbox.setNegativeButton("exit",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// getActivity().finish();
}
});
alertbox.show();
}
list = (GridView) getActivity().findViewById(R.id.grid);
// Getting adapter by passing xml data ArrayList
adapter = new HeadlinesAdapter(getActivity(), newsList);
list.setAdapter(adapter);
loading.setVisibility(View.INVISIBLE);
Typeface tf = Typeface.createFromAsset(getActivity().getAssets(),
"fonts/karthika.TTF");
MainActivity.flashnews.setText(MarqueeStr);
if (Headlines.headflag == "malayalam") {
MainActivity.flashnews.setTypeface(tf);
}
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent myintent = new Intent(
"com.abc.malayalam2headlinespodcast.PODCAST");
Bundle mybundle = new Bundle();
mybundle.putInt("number", position);
myintent.putExtras(mybundle);
startActivity(myintent);
}
});
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
parse();
if (Title != null) {
populate_listview();
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
}
}
public static void parse() {
//parsing done here
}
}
最佳答案
您不应将 Splash 实现为 Activity，而应将其实现为 DialogFragment。只需设置该对话框 fragment 的样式，使其全屏显示。
关于展示:
SplashDialogFragment splashDlg = new SplashDialogFragment();
splashDlg.show(getSupportFragmentManager(), "SplashScreen");
然后关闭:
SplashDialogFragment splashDlg = (SplashDialogFragment) getSupportFragmentManager().findByTag("SplashScreen");
splashDlg.dismiss();
关于android - 从 Fragment 完成一个 Activity ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13643206/