| package android.app; |
| |
| /** |
| * API for performing a set of Fragment operations. |
| */ |
| public abstract class FragmentTransaction { |
| /** |
| * Calls {@link #add(int, Fragment, String)} with a 0 containerViewId. |
| */ |
| public abstract FragmentTransaction add(Fragment fragment, String tag); |
| |
| /** |
| * Calls {@link #add(int, Fragment, String)} with a null tag. |
| */ |
| public abstract FragmentTransaction add(int containerViewId, Fragment fragment); |
| |
| /** |
| * Add a fragment to the activity state. This fragment may optionally |
| * also have its view (if {@link Fragment#onCreateView Fragment.onCreateView} |
| * returns non-null) into a container view of the activity. |
| * |
| * @param containerViewId Optional identifier of the container this fragment is |
| * to be placed in. If 0, it will not be placed in a container. |
| * @param fragment The fragment to be added. This fragment must not already |
| * be added to the activity. |
| * @param tag Optional tag name for the fragment, to later retrieve the |
| * fragment with {@link Activity#findFragmentByTag(String) |
| * Activity.findFragmentByTag(String)}. |
| * |
| * @return Returns the same FragmentTransaction instance. |
| */ |
| public abstract FragmentTransaction add(int containerViewId, Fragment fragment, String tag); |
| |
| /** |
| * Calls {@link #replace(int, Fragment, String)} with a null tag. |
| */ |
| public abstract FragmentTransaction replace(int containerViewId, Fragment fragment); |
| |
| /** |
| * Replace an existing fragment that was added to a container. This is |
| * essentially the same as calling {@link #remove(Fragment)} for all |
| * currently added fragments that were added with the same containerViewId |
| * and then {@link #add(int, Fragment, String)} with the same arguments |
| * given here. |
| * |
| * @param containerViewId Identifier of the container whose fragment(s) are |
| * to be replaced. |
| * @param fragment The new fragment to place in the container. |
| * @param tag Optional tag name for the fragment, to later retrieve the |
| * fragment with {@link Activity#findFragmentByTag(String) |
| * Activity.findFragmentByTag(String)}. |
| * |
| * @return Returns the same FragmentTransaction instance. |
| */ |
| public abstract FragmentTransaction replace(int containerViewId, Fragment fragment, String tag); |
| |
| /** |
| * Remove an existing fragment. If it was added to a container, its view |
| * is also removed from that container. |
| * |
| * @param fragment The fragment to be removed. |
| * |
| * @return Returns the same FragmentTransaction instance. |
| */ |
| public abstract FragmentTransaction remove(Fragment fragment); |
| |
| /** |
| * Hides an existing fragment. This is only relevant for fragments whose |
| * views have been added to a container, as this will cause the view to |
| * be hidden. |
| * |
| * @param fragment The fragment to be hidden. |
| * |
| * @return Returns the same FragmentTransaction instance. |
| */ |
| public abstract FragmentTransaction hide(Fragment fragment); |
| |
| /** |
| * Shows a previously hidden fragment. This is only relevant for fragments whose |
| * views have been added to a container, as this will cause the view to |
| * be shown. |
| * |
| * @param fragment The fragment to be shown. |
| * |
| * @return Returns the same FragmentTransaction instance. |
| */ |
| public abstract FragmentTransaction show(Fragment fragment); |
| |
| /** |
| * @return <code>true</code> if this transaction contains no operations, |
| * <code>false</code> otherwise. |
| */ |
| public abstract boolean isEmpty(); |
| |
| /** |
| * Bit mask that is set for all enter transitions. |
| */ |
| public static final int TRANSIT_ENTER_MASK = 0x1000; |
| |
| /** |
| * Bit mask that is set for all exit transitions. |
| */ |
| public static final int TRANSIT_EXIT_MASK = 0x2000; |
| |
| /** Not set up for a transition. */ |
| public static final int TRANSIT_UNSET = -1; |
| /** No animation for transition. */ |
| public static final int TRANSIT_NONE = 0; |
| /** Fragment is being added onto the stack */ |
| public static final int TRANSIT_FRAGMENT_OPEN = 1 | TRANSIT_ENTER_MASK; |
| /** Fragment is being removed from the stack */ |
| public static final int TRANSIT_FRAGMENT_CLOSE = 2 | TRANSIT_EXIT_MASK; |
| /** Fragment is being added in a 'next' operation*/ |
| public static final int TRANSIT_FRAGMENT_NEXT = 3 | TRANSIT_ENTER_MASK; |
| /** Fragment is being removed in a 'previous' operation */ |
| public static final int TRANSIT_FRAGMENT_PREV = 4 | TRANSIT_EXIT_MASK; |
| |
| /** |
| * Set specific animation resources to run for the fragments that are |
| * entering and exiting in this transaction. |
| */ |
| public abstract FragmentTransaction setCustomAnimations(int enter, int exit); |
| |
| /** |
| * Select a standard transition animation for this transaction. May be |
| * one of {@link #TRANSIT_NONE}, {@link #TRANSIT_FRAGMENT_OPEN}, |
| * or {@link #TRANSIT_FRAGMENT_CLOSE} |
| */ |
| public abstract FragmentTransaction setTransition(int transit); |
| |
| /** |
| * Set a custom style resource that will be used for resolving transit |
| * animations. |
| */ |
| public abstract FragmentTransaction setTransitionStyle(int styleRes); |
| |
| /** |
| * Add this transaction to the back stack. This means that the transaction |
| * will be remembered after it is committed, and will reverse its operation |
| * when later popped off the stack. |
| * |
| * @param name An optional name for this back stack state, or null. |
| */ |
| public abstract FragmentTransaction addToBackStack(String name); |
| |
| /** |
| * Returns true if this FragmentTransaction is allowed to be added to the back |
| * stack. If this method would return false, {@link #addToBackStack(String)} |
| * will throw {@link IllegalStateException}. |
| * |
| * @return True if {@link #addToBackStack(String)} is permitted on this transaction. |
| */ |
| public abstract boolean isAddToBackStackAllowed(); |
| |
| /** |
| * Disallow calls to {@link #addToBackStack(String)}. Any future calls to |
| * addToBackStack will throw {@link IllegalStateException}. If addToBackStack |
| * has already been called, this method will throw IllegalStateException. |
| */ |
| public abstract FragmentTransaction disallowAddToBackStack(); |
| |
| /** |
| * Set the full title to show as a bread crumb when this transaction |
| * is on the back stack, as used by {@link FragmentBreadCrumbs}. |
| * |
| * @param res A string resource containing the title. |
| */ |
| public abstract FragmentTransaction setBreadCrumbTitle(int res); |
| |
| /** |
| * Like {@link #setBreadCrumbTitle(int)} but taking a raw string; this |
| * method is <em>not</em> recommended, as the string can not be changed |
| * later if the locale changes. |
| */ |
| public abstract FragmentTransaction setBreadCrumbTitle(CharSequence text); |
| |
| /** |
| * Set the short title to show as a bread crumb when this transaction |
| * is on the back stack, as used by {@link FragmentBreadCrumbs}. |
| * |
| * @param res A string resource containing the title. |
| */ |
| public abstract FragmentTransaction setBreadCrumbShortTitle(int res); |
| |
| /** |
| * Like {@link #setBreadCrumbShortTitle(int)} but taking a raw string; this |
| * method is <em>not</em> recommended, as the string can not be changed |
| * later if the locale changes. |
| */ |
| public abstract FragmentTransaction setBreadCrumbShortTitle(CharSequence text); |
| |
| /** |
| * Schedules a commit of this transaction. The commit does |
| * not happen immediately; it will be scheduled as work on the main thread |
| * to be done the next time that thread is ready. |
| * |
| * <p class="note">A transaction can only be committed with this method |
| * prior to its containing activity saving its state. If the commit is |
| * attempted after that point, an exception will be thrown. This is |
| * because the state after the commit can be lost if the activity needs to |
| * be restored from its state. See {@link #commitAllowingStateLoss()} for |
| * situations where it may be okay to lose the commit.</p> |
| * |
| * @return Returns the identifier of this transaction's back stack entry, |
| * if {@link #addToBackStack(String)} had been called. Otherwise, returns |
| * a negative number. |
| */ |
| public abstract int commit(); |
| |
| /** |
| * Like {@link #commit} but allows the commit to be executed after an |
| * activity's state is saved. This is dangerous because the commit can |
| * be lost if the activity needs to later be restored from its state, so |
| * this should only be used for cases where it is okay for the UI state |
| * to change unexpectedly on the user. |
| */ |
| public abstract int commitAllowingStateLoss(); |
| } |