/**
* Pop the backstack at the given position until the Fragment with the given fragmentTag is on top
*
* @param stackId the position of the backstack which should be used
* @param fragmentTag the fragmentTag which belongs to the Fragment that should be gone back to
* @return true if the Fragment with the given fragmentTag is now on top. False if Fragment with
* given fragmentTag not found
*/
public boolean backToFragment(int stackId, String fragmentTag, boolean withBundle) {
ArrayList<FragmentStateHolder> fragmentsStack = mMapOfStacks.get(stackId);
for (FragmentStateHolder fpb : fragmentsStack) {
if (fpb.fragmentTag.equals(fragmentTag)) {
if (fragmentsStack.size() > 1) {
while (fragmentsStack.size() > 0
&& !(fragmentsStack.get(fragmentsStack.size() - 1).fragmentTag.equals(fragmentTag))) {
fragmentsStack.remove(fragmentsStack.get(fragmentsStack.size() - 1));
}
FragmentTransaction ft = mFragmentManager.beginTransaction();
if (withBundle) {
Bundle bundle = new Bundle();
bundle.putLong(fpb.tomahawkListItemType, fpb.tomahawkListItemId);
bundle.putInt(TomahawkFragment.TOMAHAWK_LIST_SCROLL_POSITION, fpb.listScrollPosition);
bundle.putString(SearchableFragment.SEARCHABLEFRAGMENT_QUERY_STRING, fpb.queryString);
ft.replace(
mContentFrameId,
Fragment.instantiate(mActivity, fpb.clss.getName(), bundle),
fpb.fragmentTag);
} else {
ft.replace(
mContentFrameId,
Fragment.instantiate(mActivity, fpb.clss.getName()),
fpb.fragmentTag);
}
ft.commit();
mActivity.onBackStackChanged();
}
return fragmentsStack.get(fragmentsStack.size() - 1).equals(fragmentTag);
}
}
return false;
}
/**
* Replaces the current fragment by the previous fragment stored in the backStack. Does nothing
* and returns false if no fragment is back-stacked.
*/
public boolean back(int stackId) {
ArrayList<FragmentStateHolder> fragmentsStack = mMapOfStacks.get(stackId);
if (fragmentsStack.size() > 1) {
FragmentStateHolder previousFragmentStateHolder =
fragmentsStack.get(fragmentsStack.size() - 2);
// Restore the remembered fragment and remove it from back fragments.
this.replace(stackId, previousFragmentStateHolder, true);
mActivity.onBackStackChanged();
return true;
}
// Nothing to go back.
return false;
}
public void setCurrentStackId(int stackToShow) {
if (mCurrentlyShownStack != stackToShow) {
mCurrentlyShownStack = stackToShow;
ArrayList<FragmentStateHolder> stack = mMapOfStacks.get(stackToShow);
FragmentTransaction ft = mFragmentManager.beginTransaction();
FragmentStateHolder fragmentStateHolder = stack.get(stack.size() - 1);
Bundle bundle = new Bundle();
bundle.putLong(
fragmentStateHolder.tomahawkListItemType, fragmentStateHolder.tomahawkListItemId);
bundle.putInt(
TomahawkFragment.TOMAHAWK_LIST_SCROLL_POSITION, fragmentStateHolder.listScrollPosition);
bundle.putString(
SearchableFragment.SEARCHABLEFRAGMENT_QUERY_STRING, fragmentStateHolder.queryString);
ft.replace(
mContentFrameId,
Fragment.instantiate(mActivity, fragmentStateHolder.clss.getName(), bundle),
stack.get(stack.size() - 1).fragmentTag);
ft.commit();
}
mActivity.onBackStackChanged();
}
/** Replaces the view pager fragment at specified position. */
public void replace(int stackId, FragmentStateHolder fragmentStateHolder, boolean isBackAction) {
// Get fragmentsStack for the given (tabs)position
ArrayList<FragmentStateHolder> fragmentStateHolders = mMapOfStacks.get(stackId);
FragmentStateHolder currentFragmentStateHolder =
fragmentStateHolders.get(fragmentStateHolders.size() - 1);
if (currentFragmentStateHolder != null) {
// Replace the fragment using a transaction.
FragmentTransaction ft = mFragmentManager.beginTransaction();
if (isBackAction) {
fragmentStateHolders.remove(currentFragmentStateHolder);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE);
} else {
Fragment currentFragment =
mFragmentManager.findFragmentByTag(currentFragmentStateHolder.fragmentTag);
if (currentFragment != null && currentFragment instanceof TomahawkFragment) {
currentFragmentStateHolder.listScrollPosition =
((TomahawkFragment) currentFragment).getListScrollPosition();
}
fragmentStateHolders.add(fragmentStateHolder);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
}
Bundle bundle = new Bundle();
bundle.putLong(
fragmentStateHolder.tomahawkListItemType, fragmentStateHolder.tomahawkListItemId);
bundle.putInt(
TomahawkFragment.TOMAHAWK_LIST_SCROLL_POSITION, fragmentStateHolder.listScrollPosition);
bundle.putString(
SearchableFragment.SEARCHABLEFRAGMENT_QUERY_STRING, fragmentStateHolder.queryString);
ft.replace(
mContentFrameId,
Fragment.instantiate(mActivity, fragmentStateHolder.clss.getName(), bundle),
fragmentStateHolder.fragmentTag);
ft.commit();
}
mActivity.onBackStackChanged();
}
