public Fragment getVisibleFragment() {
FragmentManager fragmentManager = MainActivity.this.getSupportFragmentManager();
List<Fragment> fragments = fragmentManager.getFragments();
for (Fragment fragment : fragments) {
if (fragment != null && fragment.getUserVisibleHint()) return (Fragment) fragment;
}
return null;
}
public static void fixActiveFragment(FragmentManager fragmentManager, Fragment fragment) {
FragmentManagerImpl fm = (FragmentManagerImpl) fragmentManager;
boolean needMatch = false;
Fragment willRemoveFrag = null;
if (fm.mActive != null) {
int index = fragment.mIndex;
if (index < 0) {
Log.e(TAG, String.format("Fragment mIndex %s < 0 ! Origin: %s", fragment.mIndex, fragment));
fragment.getFragmentManager().beginTransaction().remove(fragment).commit();
return;
}
Fragment origin = fm.mActive.get(index);
if (origin != null) {
if ((origin.mIndex != fragment.mIndex) || !(origin.equals(fragment))) {
Log.e(
TAG,
String.format(
"Fragment isn't equal! Origin: %s %s, Fragment: %s %s",
origin.toString(), origin.mIndex, fragment.toString(), fragment.mIndex));
ArrayList<Integer> indexArray = new ArrayList<>();
for (Fragment f : fm.mAdded) {
if (indexArray.contains(f.mIndex)) {
willRemoveFrag = origin;
break;
}
indexArray.add(f.mIndex);
}
}
}
fm.mActive.set(index, fragment);
if (willRemoveFrag != null) {
// 2016.01.26 Fix bug mAdded not match
// 瀏覽所有Fragment後，轉至後瀏覽其他Fragment會產生衝突
fm.mAdded.remove(willRemoveFrag);
}
// 如往回跳的話會發現沒有執行
// 1~5 is Fragment
// 1 2 3 4 5 -> 3
// 1 2 3 -> 1
// v25.0.0 Fix fragment didn't run, if through step 1, 2, 3 then go back to 1, step 1 fragment
// didn't run
if (fragment.getUserVisibleHint() && !fragment.isResumed()) {
if (!FragmentUtils.isStateLoss(fragment.getFragmentManager())) {
fragment
.getFragmentManager()
.beginTransaction()
.detach(fragment)
.attach(fragment)
.commit();
}
}
}
}
public boolean getUserVisibleHint() {
return zzadh.getUserVisibleHint();
}