I created a class to retrieve comments from a JSON encoding from a PHP file. This class, extends from AsyncTask:
public class RecuperarComentarisFoto extends AsyncTask<String, String, String>{
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(????);
pDialog.setMessage("Creating Product..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}
As you can see, I'm trying to show a ProgressDialog while the "doInBackground" proccess is working. But progressDialog constructor, asks for a Context, and I don't know how to provide it.
I'm calling this class from a Fragment, so I can't access the context like this:
pDialog = new ProgressDialog(MyFragmentA.context);
The "main" acitivity is called: AndroidViewPagerActivity which extends FragmentActivity.
(By main, I mean that it's the one that is creating the tabs, and managing the navigation between them.)
This is it's code:
public class AndroidViewPagerActivity extends FragmentActivity {
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
final ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_HOME);
bar.hide();
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText("Fragment A"), MyFragmentA.class, null);
if (savedInstanceState != null) {
bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}
}
How can I access the context? Which context should I use? "AndroidViewPagerActivity" context? So how can I access its context from a fragment?
Thank you.
Sergi
You can use the getActivity() method to get context or You can use getContext() method . View root = inflater.
A Fragment represents a reusable portion of your app's UI. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. Fragments cannot live on their own--they must be hosted by an activity or another fragment.
Definition. it's the context of current state of the application/object. It lets newly-created objects understand what has been going on. Typically, you call it to get information regarding another part of your program (activity and package/application).
Use getActivity()
inside the Fragment
to obtain a Context
that you can pass along. That works, as Activity
inherits from Context
.
As alternative you can use getApplicationContext()
to obtain the Context
.
@heiko-rupp's answer is outdated,
Fragment.getContext()
has been introduced in Fragments in API 23.
To pass it around from fragment you have to use, like this.getContext()
https://developer.android.com/reference/android/app/Fragment.html#getContext() which according to documentations just
Return the Context this fragment is currently associated with.
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