@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (areColorTransitionsEnabled) {
if (position < mPagerAdapter.getCount() - 1) {
if (mPagerAdapter.getItem(position) instanceof ISlideBackgroundColorHolder
&& mPagerAdapter.getItem(position + 1) instanceof ISlideBackgroundColorHolder) {
Fragment currentSlide = mPagerAdapter.getItem(position);
Fragment nextSlide = mPagerAdapter.getItem(position + 1);
ISlideBackgroundColorHolder currentSlideCasted =
(ISlideBackgroundColorHolder) currentSlide;
ISlideBackgroundColorHolder nextSlideCasted = (ISlideBackgroundColorHolder) nextSlide;
// Check if both fragments are attached to an activity,
// otherwise getDefaultBackgroundColor may fail.
if (currentSlide.isAdded() && nextSlide.isAdded()) {
int newColor =
(int)
argbEvaluator.evaluate(
positionOffset,
currentSlideCasted.getDefaultBackgroundColor(),
nextSlideCasted.getDefaultBackgroundColor());
currentSlideCasted.setBackgroundColor(newColor);
nextSlideCasted.setBackgroundColor(newColor);
}
} else {
throw new IllegalStateException(
"Color transitions are only available if all slides implement ISlideBackgroundColorHolder.");
}
}
}
}
protected void processAuth(@Size(2) String[] auth, OsmOAuth.AuthType type, String username) {
if (auth == null) {
if (mFragment.isAdded()) {
new AlertDialog.Builder(mFragment.getActivity())
.setTitle(R.string.editor_login_error_dialog)
.setPositiveButton(android.R.string.ok, null)
.show();
Statistics.INSTANCE.trackEvent(
Statistics.EventName.EDITOR_AUTH_REQUEST_RESULT,
Statistics.params()
.add(Statistics.EventParam.IS_SUCCESS, false)
.add(Statistics.EventParam.TYPE, type.name));
}
return;
}
OsmOAuth.setAuthorization(auth[0], auth[1], username);
if (mFragment.isAdded()) Utils.navigateToParent(mFragment.getActivity());
Statistics.INSTANCE.trackEvent(
Statistics.EventName.EDITOR_AUTH_REQUEST_RESULT,
Statistics.params()
.add(Statistics.EventParam.IS_SUCCESS, true)
.add(Statistics.EventParam.TYPE, type.name));
}
@Override
public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
for (int i = 0; i < rgs.getChildCount(); i++) {
if (rgs.getChildAt(i).getId() == checkedId) {
Fragment fragment = fragments.get(i);
FragmentTransaction ft = obtainFragmentTransaction(i);
getCurrentFragment().onPause(); // 暂停当前tab
// getCurrentFragment().onStop(); // 暂停当前tab
if (fragment.isAdded()) {
// fragment.onStart(); // 启动目标tab的onStart()
fragment.onResume(); // 启动目标tab的onResume()
} else {
ft.add(fragmentContentId, fragment);
}
showTab(i); // 显示目标tab
ft.commit();
// 如果设置了切换tab额外功能功能接口
if (null != onRgsExtraCheckedChangedListener) {
onRgsExtraCheckedChangedListener.OnRgsExtraCheckedChanged(radioGroup, checkedId, i);
}
}
}
}
// simple convenience function for when a fragment wants to log a URL
// don't need to worry about making sure it only happens once, because Fragments manage their own
// state
// in a way that activities do not.
public static void track(Fragment fragment, String url) {
if (fragment.isAdded()) {
GoogleAnalyticsTracker tracker = start(fragment.getActivity());
page(fragment.getActivity(), tracker, url);
stop(tracker);
}
}
/**
* 切换fragment
*
* @param to
*/
public void switchFragment(Fragment to) {
// FragmentManager fragmentManager = getFragmentManager();
// FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
// if (!to.isAdded()) { // 先判断是否被add过
// fragmentTransaction.hide(curFragment).add(R.id.frameLayout_main, to); //
// 隐藏当前的fragment，add下一个到Activity中
// } else {
// fragmentTransaction.hide(curFragment).show(to); // 隐藏当前的fragment，显示下一个
// }
// fragmentTransaction.commitAllowingStateLoss();
if (!to.isAdded()) { // 先判断是否被add过
getSupportFragmentManager()
.beginTransaction()
.hide(curFragment)
.add(R.id.frameLayout_main, to)
.commitAllowingStateLoss();
// 隐藏当前的fragment，add下一个到Activity中
} else {
getSupportFragmentManager()
.beginTransaction()
.hide(curFragment)
.show(to)
.commitAllowingStateLoss();
// 隐藏当前的fragment，显示下一个
}
}
private void setFragment(Fragment fragment) {
if (fragments == null) {
return;
}
FragmentManager fragmentManager = this.getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
if (fragment.isAdded() && fragment.isVisible()) {
return;
}
if (fragment.isAdded()) {
transaction.show(fragment);
} else {
transaction.replace(R.id.content, fragment);
}
transaction.commit();
}
/**
* 隐藏显示相应的frag，并将设置当前的fragment。
*
* @param showFrag 将要显示的frag
* @param hideFrag 要隐藏的frag。
*/
private void changeFrag(Fragment showFrag, Fragment hideFrag) {
if (showFrag == hideFrag) {
LogCat.e(MainActivity.class.getName() + ":changeFrag:showFrag=hideFragment");
return;
}
FragmentTransaction ft = mFM.beginTransaction();
if (showFrag.isAdded()) {
ft.show(showFrag);
} else {
ft.add(R.id.main_content_fl, showFrag, null);
}
if (hideFrag != null && hideFrag.isAdded()) {
ft.hide(hideFrag);
}
ft.commitAllowingStateLoss();
mCurFragment = showFrag;
}
/**
* 设置fragment的跳转
*
* @param back 是否允许返回
*/
public static void setFragment(Fragment fragment, Boolean back) {
FragmentTransaction transaction = mFragManager.beginTransaction();
// 防止快速切换导致崩溃
if (!fragment.isAdded()) {
transaction.replace(R.id.fragment_container, fragment);
}
if (back) {
transaction.addToBackStack(null);
}
transaction.commit();
}
private void attachFragment(Fragment fragment, String tag) {
if (fragment != null) {
if (fragment.isDetached()) {
ensureTransaction();
fragmentTransaction.attach(fragment);
} else if (!fragment.isAdded()) {
ensureTransaction();
fragmentTransaction.add(containerId, fragment, tag);
}
}
}
private void initFragments() {
Fragment friend = getFriendsTimeLineFragment();
Fragment mentions = getMentionsTimeLineFragment();
Fragment comments = getCommentsTimeLineFragment();
Fragment fav = getFavFragment();
Fragment myself = getMyProfileFragment();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
if (!friend.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, friend, FriendsTimeLineFragment.class.getName());
fragmentTransaction.hide(friend);
}
if (!mentions.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, mentions, MentionsTimeLine.class.getName());
fragmentTransaction.hide(mentions);
}
if (!comments.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, comments, CommentsTimeLine.class.getName());
fragmentTransaction.hide(comments);
}
if (!fav.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, fav, MyFavListFragment.class.getName());
fragmentTransaction.hide(fav);
}
if (!myself.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, myself, UserInfoFragment.class.getName());
fragmentTransaction.hide(myself);
}
if (GlobalContext.getInstance().getAccountBean().isBlack_magic()) {
Fragment search = getSearchFragment();
Fragment dm = getDMFragment();
if (!search.isAdded()) {
fragmentTransaction.add(
R.id.menu_right_fl, search, SearchMainParentFragment.class.getName());
fragmentTransaction.hide(search);
}
if (!dm.isAdded()) {
fragmentTransaction.add(R.id.menu_right_fl, dm, DMUserListFragment.class.getName());
fragmentTransaction.hide(dm);
}
}
if (!fragmentTransaction.isEmpty()) {
fragmentTransaction.commit();
getSupportFragmentManager().executePendingTransactions();
}
}
/** 改变Tab键，进行更换页面 */
public void onCheckedChanged(RadioGroup arg0, int arg1) {
for (int i = 0; i < rGroup.getChildCount(); i++) {
if (rGroup.getChildAt(i).getId() == arg1) {
Fragment fragment = fragments.get(i);
FragmentTransaction ft = obtainFragmentTransaction(i);
getCurrentFragment().onPause(); // 暂停当前页面
if (fragment.isAdded()) {
fragment.onResume(); // 启动目标tab的onResume()
} else {
ft.add(fgContentId, fragment);
}
showFragment(i); // 显示目标tab
ft.commit();
}
}
}
public static void addFragment(
FragmentTransaction ft, Fragment fragment, boolean addToBackStack, final int transition) {
AppMain.isShelf = false;
try {
if (!fragment.isAdded()) {
ft.replace(R.id.realtabcontent, fragment);
ft.setTransition(transition);
ft.addToBackStack(null);
ft.commit();
} else {
return;
}
} catch (Exception e) {
// TODO: handle exception
}
}
@Override
protected void onPostExecute(Boolean b) {
super.onPostExecute(b);
if (progress != null) {
progress.dismiss();
}
if (!b) {
Toast.makeText(mContext, R.string.photo_upload_failed, Toast.LENGTH_LONG).show();
} else {
Toast.makeText(mContext, R.string.photo_upload_successfully, Toast.LENGTH_LONG).show();
if (mFragment != null && mFragment.isAdded() && mCursor != null && mCursor.getCount() > 0) {
((POIDetailFragment) mFragment).reloadData();
}
}
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = fragments.get(position);
if (!fragment.isAdded()) { // 如果fragment还没有added
FragmentTransaction ft = fragmentManager.beginTransaction();
ft.add(fragment, fragment.getClass().getSimpleName());
ft.commit();
/**
* 在用FragmentTransaction.commit()方法提交FragmentTransaction对象后 会在进程的主线程中，用异步的方式来执行。
* 如果想要立即执行这个等待中的操作，就要调用这个方法（只能在主线程中调用）。 要注意的是，所有的回调和相关的行为都会在这个调用中被执行完成，因此要仔细确认这个方法的调用位置。
*/
fragmentManager.executePendingTransactions();
}
if (fragment.getView().getParent() == null) {
container.addView(fragment.getView()); // 为viewpager增加布局
}
return fragment.getView();
}
@Override
public Parcelable saveState() {
Bundle state = null;
// 目前顯示的 Fragments
for (int i = 0; i < mFragments.size(); i++) {
Fragment f = mFragments.get(i);
if (f != null && f.isAdded()) {
if (state == null) {
state = new Bundle();
}
String key = "f" + i;
mFragmentManager.putFragment(state, key, f);
}
}
if (mFragmentStates.size() > 0) {
if (state == null) {
state = new Bundle();
}
// Create new instance for some reason
ArrayList<FragmentState> fs = new ArrayList<>();
fs.addAll(mFragmentStates);
state.putParcelableArrayList("states_fragment", fs);
ArrayList<Bundle> args = new ArrayList<>();
args.addAll(mFragmentArgs);
state.putParcelableArrayList("arg_fragment", args);
ArrayList<String> tagArray = new ArrayList<>();
tagArray.addAll(mFragmentTags);
state.putStringArrayList("tag_fragment", tagArray);
ArrayList<String> classNameArray = new ArrayList<>();
classNameArray.addAll(mFragmentClassNames);
state.putStringArrayList("classname_fragment", classNameArray);
}
return state;
}
public boolean isAdded() {
return zzadh.isAdded();
}
protected Fragment getMainFragment() {
Fragment fragment = getSupportFragmentManager().findFragmentById(getMainFragmentContainerId());
if (fragment != null && fragment.isAdded()) return fragment;
return null;
}
private void removeFragment(Fragment fragment) {
if (fragment != null && fragment.isAdded()) {
ensureTransaction();
fragmentTransaction.remove(fragment);
}
}
@Override
protected boolean isComponentValid(android.support.v4.app.Fragment fragment) {
return fragment.isAdded();
}
public void setFragment(String fragmentName) {
Fragment temp = fragmentManager.findFragmentByTag(fragmentName);
if (temp != null && temp.isAdded()) {
// L.t(getApplicationContext(),fragmentName + " is Added already");
if (currentFrag != null && !currentFrag.getTag().contains(fragmentName)) {
// L.t(getApplicationContext(), currentFrag.getTag() +" was current");
fragmentManager
.beginTransaction()
.hide(currentFrag)
.show(temp)
// .addToBackStack(fragmentName)
.commit();
}
// When rotation a fragment is added, however current fragment is null.
currentFrag = temp;
return;
} else if (temp != null) {
// when using retainInstance(true) the lifecycle may change.
// L.t(getApplicationContext(), fragmentName + " not null but is not added");
}
try {
Class cl = Class.forName(fragmentName);
Constructor con = cl.getConstructor();
temp = (Fragment) con.newInstance();
// First Fragment created
if (currentFrag == null) {
fragmentManager
.beginTransaction()
.add(R.id.mainframe, temp, fragmentName)
// .addToBackStack(fragmentName)
.commit();
} else {
fragmentManager
.beginTransaction()
.hide(currentFrag)
.add(R.id.mainframe, temp, fragmentName)
// .addToBackStack(fragmentName)
.commit();
}
currentFrag = temp;
return;
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassCastException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
Toast.makeText(getApplicationContext(), "Reflection error", Toast.LENGTH_SHORT).show();
}
@Override
public void run() {
if (fragment.isAdded()) {
showContent();
}
}