下面列出了android.support.v4.app.FragmentManager#popBackStackImmediate ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private static void ShowFragment(FragmentActivity activity, String tag, Fragment fragment, String previous) {
if (fragment == null) {
Log.e(TAG, "Cannot show a null fragment, ShowFragment("+tag+") aborted.");
return;
}
FragmentManager fm = activity.getSupportFragmentManager();
//abort if fragment is already the current one
Fragment current = fm.findFragmentById(R.id.fragment_placeholder);
if(current != null && current.getTag().equals(tag))
return;
//try to pop back if the fragment is already on the backstack
if (fm.popBackStackImmediate(tag, 0))
return;
//fragment is not there yet, spawn a new one
FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.anim.anim_enter_right, R.anim.anim_leave_left, R.anim.anim_enter_left, R.anim.anim_leave_right);
ft.replace(R.id.fragment_placeholder, fragment, tag);
ft.addToBackStack(previous);
ft.commit();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// Code here will be triggered once the drawer closes as we don't want anything to happen so we leave this blank
mActionBarDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
//calling sync state is necessary or else your hamburger icon wont show up
mActionBarDrawerToggle.syncState();
if (savedInstanceState == null) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.container, new ContainerFragment());
transaction.commit();
}
}
@Override
protected void intializePansAfterRotation(int oldPanNumbers, @NonNull FragmentManager fragmentManager) {
if (oldPanNumbers != paneNumber) {
if (oldPanNumbers == 1) {
Fragment oldBookInfo = fragmentManager.findFragmentByTag(BOOK_INFORMATION_FRAGMENT_TAG);
if (oldBookInfo != null) {
fragmentManager.popBackStackImmediate(BOOK_INFORMATION_FRAGMENT_ADDED, FragmentManager.POP_BACK_STACK_INCLUSIVE);
fragmentManager.beginTransaction().remove(oldBookInfo).commit();
fragmentManager.beginTransaction()
.replace(R.id.book_info_container, oldBookInfo, BOOK_INFORMATION_FRAGMENT_TAG)
.commit();
}
Fragment oldBookList = fragmentManager.findFragmentByTag(BOOK_LIST_FRAGMENT_TAG);
if (oldBookList != null) {
fragmentManager.popBackStackImmediate(BOOK_LIST_FRAGMENT_ADDED, FragmentManager.POP_BACK_STACK_INCLUSIVE);
fragmentManager.beginTransaction().remove(oldBookList).commit();
fragmentManager.beginTransaction()
.replace(R.id.book_list_container, oldBookList, BOOK_LIST_FRAGMENT_TAG)
.commit();
}
}
}
}
/**
* 判断当前 Fragment 是否消费回退事件
*
* @param fragmentManager 上级fragment 的管理
* @return
*/
public boolean onConsumeBackEvent(FragmentManager fragmentManager) {
boolean consume = FragmentCompat.isConsumeBackEvent(getChildFragmentManager());
if (consume) {
// 子fragment消费成功以后，判断当前fragment是否还有子fragment，没有的话，看情况决定是否关闭
if (getChildFragmentManager().getBackStackEntryCount() == 0 && noChild2Finish()) {
return fragmentManager.popBackStackImmediate();
}
return true;
} else {
// 子fragment未消费回退事件,则由当前fragment进行消费
return fragmentManager.popBackStackImmediate();
}
}
/**
* Pop to fragment.
*
* @param fm The manager of fragment.
* @param popClz The class of fragment will be popped to.
* @param isIncludeSelf True to include the fragment, false otherwise.
* @param isImmediate True to pop immediately, false otherwise.
*/
public static void popTo(@NonNull final FragmentManager fm,
final Class<? extends Fragment> popClz,
final boolean isIncludeSelf,
final boolean isImmediate) {
if (isImmediate) {
fm.popBackStackImmediate(popClz.getName(),
isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
} else {
fm.popBackStack(popClz.getName(),
isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
}
}
private void clearBackStack() {
FragmentManager fm = getSupportFragmentManager();
while (fm.getBackStackEntryCount() > 0) {
fm.popBackStackImmediate();
}
}
public boolean returnToFirst() {
if (!activity.isFinishing()) {
FragmentManager fragmentManager = activity.getSupportFragmentManager();
if (fragmentManager.getBackStackEntryCount() > 0) {
String name = fragmentManager.getBackStackEntryAt(0).getName();
fragmentManager.popBackStackImmediate(name, FragmentManager.POP_BACK_STACK_INCLUSIVE);
return true;
}
}
return false;
}
private void replaceFragment(int id, Fragment fragment) {
FragmentManager fragmentManager = getChildFragmentManager();
fragmentManager.popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
fragmentManager.beginTransaction()
.replace(id, fragment, fragment.getClass().getSimpleName())
.commit();
}
public void clearBackStackFragmets(final String tag)
{
// in my case I get the support fragment manager, it should work with the native one too
FragmentManager fragmentManager = mActivity.getSupportFragmentManager();
// this will clear the back stack and displays no animation on the screen
fragmentManager.popBackStackImmediate(tag, FragmentManager.POP_BACK_STACK_INCLUSIVE);
// fragmentManager.popBackStackImmediate(SplashFragment.class.getCanonicalName(),FragmentManager.POP_BACK_STACK_INCLUSIVE);
// Methods.hideKeyboard();
}
@Override
public void onBackPressed() {
FragmentManager fm = getSupportFragmentManager();
if (fm.popBackStackImmediate()){// pop成功；
getSupportActionBar().setTitle(R.string.app_name);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
} else {
super.onBackPressed();
}
}
/**
* 出栈同级别fragment
*
* @param fragmentManager fragment管理器
*/
public static void popFragments(@NonNull FragmentManager fragmentManager) {
while (fragmentManager.getBackStackEntryCount() > 0) {
fragmentManager.popBackStackImmediate();
}
}
public void onEvent(Events.CollectionDropped e) {
FragmentManager fm = getSupportFragmentManager();
fm.popBackStackImmediate();
CollectionListFragment fragment = (CollectionListFragment)fm.findFragmentById(R.id.frame_1);
fragment.onEvent(e);
}
/**
* 出栈同级别fragment
*
* @param fragmentManager fragment管理器
*/
public static void popFragments(@NonNull FragmentManager fragmentManager) {
while (fragmentManager.getBackStackEntryCount() > 0) {
fragmentManager.popBackStackImmediate();
}
}
/**
* 出栈fragment
*
* @param fragmentManager fragment管理器
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popFragment(@NonNull final FragmentManager fragmentManager) {
return fragmentManager.popBackStackImmediate();
}
/**
* 出栈到指定fragment
*
* @param fragmentManager fragment管理器
* @param fragmentClass Fragment类
* @param isIncludeSelf 是否包括Fragment类自己
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popToFragment(@NonNull final FragmentManager fragmentManager,
final Class<? extends Fragment> fragmentClass,
final boolean isIncludeSelf) {
return fragmentManager.popBackStackImmediate(fragmentClass.getName(), isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
}
/**
* 出栈fragment
*
* @param fragmentManager fragment管理器
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popFragment(@NonNull FragmentManager fragmentManager) {
return fragmentManager.popBackStackImmediate();
}
/**
* 出栈到指定fragment
*
* @param fragmentManager fragment管理器
* @param fragmentClass Fragment类
* @param isIncludeSelf 是否包括Fragment类自己
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popToFragment(@NonNull FragmentManager fragmentManager,
Class<? extends Fragment> fragmentClass,
boolean isIncludeSelf) {
return fragmentManager.popBackStackImmediate(fragmentClass.getSimpleName(), isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
}
/**
* 出栈fragment
*
* @param fragmentManager fragment管理器
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popFragment(@NonNull FragmentManager fragmentManager) {
return fragmentManager.popBackStackImmediate();
}
/**
* 出栈到指定fragment
*
* @param fragmentManager fragment管理器
* @param fragmentClass Fragment类
* @param isIncludeSelf 是否包括Fragment类自己
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popToFragment(@NonNull FragmentManager fragmentManager,
Class<? extends Fragment> fragmentClass,
boolean isIncludeSelf) {
return fragmentManager.popBackStackImmediate(fragmentClass.getName(), isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
}
/**
* 出栈到指定fragment
*
* @param fragmentManager fragment管理器
* @param fragmentClass Fragment类
* @param isIncludeSelf 是否包括Fragment类自己
* @return {@code true}: 出栈成功<br>{@code false}: 出栈失败
*/
public static boolean popToFragment(@NonNull FragmentManager fragmentManager,
Class<? extends Fragment> fragmentClass,
boolean isIncludeSelf) {
return fragmentManager.popBackStackImmediate(fragmentClass.getSimpleName(), isIncludeSelf ? FragmentManager.POP_BACK_STACK_INCLUSIVE : 0);
}