private void changePage(int position, SliderItem item) {
mIgnoreBackStack = true;
if (mCurrentPage >= 0) {
final SliderItem lastItem = mAdapter.getItem(mCurrentPage);
final WeakReference<Fragment> ref = lastItem.mLastFragment;
final Fragment fragment = ref == null ? null : ref.get();
if (fragment != null && fragment.isAdded() && lastItem.mSaveState) {
if (!fragment.isDetached()) {
mFragmentManager.beginTransaction().detach(fragment).commit();
mFragmentManager.executePendingTransactions();
}
lastItem.mSavedState = mFragmentManager.saveFragmentInstanceState(fragment);
}
}
mCurrentPage = position;
mAdapter.notifyDataSetInvalidated();
while (mFragmentManager.popBackStackImmediate()) {}
final Fragment fragment = Fragment.instantiate(item.mFragmentClass);
if (item.mSavedState != null) {
fragment.setInitialSavedState(item.mSavedState);
}
item.mLastFragment = new WeakReference<Fragment>(fragment);
replaceFragment(mFragmentManager, fragment);
mIgnoreBackStack = false;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
FragmentManager fm = getSupportFragmentManager();
fm.popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
tag = WELCOME;
TextView title = (TextView) findViewById(R.id.nav_bar_title);
title.setText(tag);
fm.beginTransaction().replace(R.id.container, new Fragment_Welcome(), tag).commit();
return true;
}
if (id == R.id.profile_icon) {
tag = PROFILE;
submenu_bar.setVisibility(View.VISIBLE);
TextView title = (TextView) findViewById(R.id.nav_bar_title);
title.setText(tag);
setSubmenuOptions(submenu_profile);
setSubmenuTitle(submenu_profile[0]);
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager
.beginTransaction()
.replace(R.id.container, new Fragment_Profile_Overview(), tag)
.addToBackStack(tag)
.commit();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBackPressed() {
if (fragmentManager.getBackStackEntryCount() > 0) {
fragmentManager.popBackStackImmediate();
return;
}
super.onBackPressed();
}
public void clearTop() {
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0)
try {
fm.popBackStackImmediate(
fm.getBackStackEntryAt(0).getId(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
} catch (IllegalStateException e) {
// Random error clearing to top. Not critical if this did not succeed, no need to crash.
if (ConnectedApp.DEBUG) throw e;
}
}
public void switchContent(Fragment fragment, String tag) {
FragmentManager fragmentManager = getSupportFragmentManager();
while (fragmentManager.popBackStackImmediate()) ;
if (fragment != null) {
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.content_frame, fragment, tag);
// Only FavoriteListFragment is added to the back stack.
if (!(fragment instanceof ProductListFragment)) {
transaction.addToBackStack(tag);
}
transaction.commit();
contentFragment = fragment;
}
}
public void onClick(View view) {
FragmentManager fm = getSupportFragmentManager();
while (fm.popBackStackImmediate()) {
fm.executePendingTransactions();
}
replaceFragment(Fragment.instantiate(clazz));
fm.executePendingTransactions();
postDelayed(
new Runnable() {
@Override
public void run() {
requireSlidingMenu().showContent();
}
},
100);
}
// Menu button opens and closes the drawer menu
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle menu item selection
if (item.getItemId() == R.id.menu_threebar) {
if (mDrawerLayout.isDrawerVisible(GravityCompat.END)) {
mDrawerLayout.closeDrawer(GravityCompat.END);
} else {
mDrawerLayout.openDrawer(GravityCompat.END);
}
} else if (item.getItemId() == ImagesGridFragment.NEXTMENUITEM) {
// Editting grid fragment
switchTo(EdittingGridFragment.class, null);
} else if (item.getItemId() == android.R.id.home) {
// home button pressed
if (!fm.popBackStackImmediate()) startActivity(new Intent(this, WelcomeActivity.class));
}
return super.onOptionsItemSelected(item);
}
public void replaceFragment(Fragment fragment, boolean bCommitAllowingStateLoss) {
String backStateName = fragment.getClass().getName();
FragmentManager manager = getSupportFragmentManager();
boolean fragmentPopped = false;
try {
fragmentPopped = manager.popBackStackImmediate(backStateName, 0);
} catch (Exception e) {
}
if (!fragmentPopped) { // fragment not in back stack, create it.
FragmentTransaction ft = manager.beginTransaction();
ft.replace(R.id.frame_container, fragment);
// ft.addToBackStack(backStateName);
if (bCommitAllowingStateLoss) ft.commitAllowingStateLoss();
else ft.commit();
}
}
private void clearBackStack() {
FragmentManager fragmentManager = getSupportFragmentManager();
if (0 < fragmentManager.getBackStackEntryCount()) {
int id = fragmentManager.getBackStackEntryAt(0).getId();
fragmentManager.popBackStackImmediate(id, FragmentManager.POP_BACK_STACK_INCLUSIVE);
}
List<Fragment> fragments = fragmentManager.getFragments();
if (fragments == null) {
return;
}
FragmentTransaction trans = fragmentManager.beginTransaction();
for (Fragment fragment : fragments) {
if (fragment != null) {
trans.remove(fragment);
}
}
trans.commit();
}
private void popBackStackNoAction() {
FragmentManager fragMan = getFragmentManager();
fragMan.removeOnBackStackChangedListener(this);
fragMan.popBackStackImmediate(BACK_STACK_INPUT, FragmentManager.POP_BACK_STACK_INCLUSIVE);
mBackStackLevel = null;
}
