本文整理匯總了Java中android.app.Fragment.isAdded方法的典型用法代碼示例。如果您正苦於以下問題：Java Fragment.isAdded方法的具體用法？Java Fragment.isAdded怎麽用？Java Fragment.isAdded使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類android.app.Fragment的用法示例。
在下文中一共展示了Fragment.isAdded方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: onBackPressed
import android.app.Fragment; //導入方法依賴的package包/類
@Override
public void onBackPressed() {
if (mDrawerLayout != null && mDrawerLayout.isDrawerOpen(Gravity.START)) {
mDrawerLayout.closeDrawer(Gravity.START);
} else {
// TODO: To be improved:
try {
super.onBackPressed();
} catch (IllegalStateException e){
Fragment fragment = getFragmentManager().findFragmentByTag(MainFragment.class.getName());
if (fragment == null) {
fragment = new MainFragment();
}
if (!fragment.isAdded()) {
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.content_frame, fragment, MainFragment.class.getName());
transaction.commit();
}
}
}
}
示例2: Overlay
import android.app.Fragment; //導入方法依賴的package包/類
/**
* Must be created from the Fragment onViewCreated() method
* @param fragment
*/
public Overlay(Fragment fragment) {
if (!fragment.isAdded()) {
throw new IllegalStateException("Overlay must be created once the fragment is added!");
}
mContext = fragment.getActivity();
ViewGroup fragmentView = (ViewGroup)fragment.getView();
if (fragmentView==null) {
throw new IllegalStateException("Overlay must be created once the fragment has its view created!");
}
int parentViewId = -1;
if (fragment instanceof BrowseFragment) {
parentViewId = R.id.browse_frame;
} else if (fragment instanceof MyVerticalGridFragment) {
parentViewId = R.id.browse_dummy;
} else if (fragment instanceof DetailsFragment) {
parentViewId = R.id.details_fragment_root;
} else if (fragment instanceof GuidedStepFragment) {
parentViewId = R.id.guidedstep_background_view_root;
} else {
throw new IllegalStateException("Overlay is not compatible with this fragment: "+fragment);
}
ViewGroup parentView = (ViewGroup)fragmentView.findViewById(parentViewId);
if (parentView==null) {
throw new IllegalStateException("parentView not found! Maybe IDs in the leanback library have been changed?");
}
LayoutInflater.from(mContext).inflate(R.layout.leanback_overlay, parentView);
mOverlayRoot = parentView.findViewById(R.id.overlay_root);
mScanProgress = new ScannerAndScraperProgress(mContext, mOverlayRoot);
mClock = new Clock(mContext, mOverlayRoot);
}
示例3: isFragmentAlive
import android.app.Fragment; //導入方法依賴的package包/類
public static boolean isFragmentAlive(Fragment fragment) {
return fragment != null && fragment.isAdded();
}