content: package android.app;
  
  import android.annotation.AnimatorRes;
  import android.annotation.IdRes;
  import android.annotation.IntDef;
  import android.annotation.Nullable;
  import android.annotation.StringRes;
  import android.annotation.StyleRes;
  import android.os.Bundle;
  import android.view.View;
  
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  
  /**
   * API for performing a set of Fragment operations.
   *
   * <div class="special reference">
   * <h3>Developer Guides</h3>
   * <p>For more information about using fragments, read the
   * <a href="{@docRoot}guide/components/fragments.html">Fragments</a> developer
   * guide.</p>
   * </div>
   *
   * @deprecated Use the <a href="{@docRoot}tools/extras/support-library.html">Support Library</a>
   *      {@link android.support.v4.app.FragmentTransaction}
   */
  @Deprecated
  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(@IdRes 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) inserted 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 FragmentManager#findFragmentByTag(String)
       * FragmentManager.findFragmentByTag(String)}.
       *
       * @return Returns the same FragmentTransaction instance.
       */
      public abstract FragmentTransaction add(@IdRes int containerViewId, Fragment fragment,
              String tag);
  
      /**
       * Calls {@link #replace(int, Fragment, String)} with a null tag.
       */
      public abstract FragmentTransaction replace(@IdRes 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 FragmentManager#findFragmentByTag(String)
       * FragmentManager.findFragmentByTag(String)}.
       *
       * @return Returns the same FragmentTransaction instance.
       */
      public abstract FragmentTransaction replace(@IdRes 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);
  
      /**
       * Detach the given fragment from the UI.  This is the same state as
       * when it is put on the back stack: the fragment is removed from
       * the UI, however its state is still being actively managed by the
       * fragment manager.  When going into this state its view hierarchy
       * is destroyed.
       *
       * @param fragment The fragment to be detached.
       *
       * @return Returns the same FragmentTransaction instance.
       */
      public abstract FragmentTransaction detach(Fragment fragment);
  
      /**
       * Re-attach a fragment after it had previously been detached from
       * the UI with {@link #detach(Fragment)}.  This
       * causes its view hierarchy to be re-created, attached to the UI,
       * and displayed.
       *
       * @param fragment The fragment to be attached.
       *
       * @return Returns the same FragmentTransaction instance.
       */
      public abstract FragmentTransaction attach(Fragment fragment);
  
      /**
       * Set a currently active fragment in this FragmentManager as the primary navigation fragment.
       *
       * <p>The primary navigation fragment's
       * {@link Fragment#getChildFragmentManager() child FragmentManager} will be called first
       * to process delegated navigation actions such as {@link FragmentManager#popBackStack()}
       * if no ID or transaction name is provided to pop to. Navigation operations outside of the
       * fragment system may choose to delegate those actions to the primary navigation fragment
       * as returned by {@link FragmentManager#getPrimaryNavigationFragment()}.</p>
       *
       * <p>The fragment provided must currently be added to the FragmentManager to be set as
       * a primary navigation fragment, or previously added as part of this transaction.</p>
       *
       * @param fragment the fragment to set as the primary navigation fragment
       * @return the same FragmentTransaction instance
       */
      public abstract FragmentTransaction setPrimaryNavigationFragment(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 should simply fade in or out; that is, no strong navigation associated
       * with it except that it is appearing or disappearing for some reason. */
      public static final int TRANSIT_FRAGMENT_FADE = 3 | TRANSIT_ENTER_MASK;
  
      /** @hide */
      @IntDef(prefix = { "TRANSIT_" }, value = {
              TRANSIT_NONE,
              TRANSIT_FRAGMENT_OPEN,
              TRANSIT_FRAGMENT_CLOSE,
              TRANSIT_FRAGMENT_FADE
      })
      @Retention(RetentionPolicy.SOURCE)
      public @interface Transit {}
  
      /**
       * Set specific animation resources to run for the fragments that are
       * entering and exiting in this transaction. These animations will not be
       * played when popping the back stack.
       */
      public abstract FragmentTransaction setCustomAnimations(@AnimatorRes int enter,
              @AnimatorRes int exit);
  
      /**
       * Set specific animation resources to run for the fragments that are
       * entering and exiting in this transaction. The <code>popEnter</code>
       * and <code>popExit</code> animations will be played for enter/exit
       * operations specifically when popping the back stack.
       */
      public abstract FragmentTransaction setCustomAnimations(@AnimatorRes int enter,
              @AnimatorRes int exit, @AnimatorRes int popEnter, @AnimatorRes int popExit);
  
      /**
       * Select a standard transition animation for this transaction.  May be
       * one of {@link #TRANSIT_NONE}, {@link #TRANSIT_FRAGMENT_OPEN},
       * {@link #TRANSIT_FRAGMENT_CLOSE}, or {@link #TRANSIT_FRAGMENT_FADE}.
       */
      public abstract FragmentTransaction setTransition(@Transit int transit);
  
      /**
       * Used with to map a View from a removed or hidden Fragment to a View from a shown
       * or added Fragment.
       * @param sharedElement A View in a disappearing Fragment to match with a View in an
       *                      appearing Fragment.
       * @param name The transitionName for a View in an appearing Fragment to match to the shared
       *             element.
       */
      public abstract FragmentTransaction addSharedElement(View sharedElement, String name);
  
      /**
       * Set a custom style resource that will be used for resolving transit
       * animations.
       */
      public abstract FragmentTransaction setTransitionStyle(@StyleRes 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(@Nullable 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(@StringRes 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(@StringRes 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);
  
      /**
       * Sets whether or not to allow optimizing operations within and across
       * transactions. This will remove redundant operations, eliminating
       * operations that cancel. For example, if two transactions are executed
       * together, one that adds a fragment A and the next replaces it with fragment B,
       * the operations will cancel and only fragment B will be added. That means that
       * fragment A may not go through the creation/destruction lifecycle.
       * <p>
       * The side effect of removing redundant operations is that fragments may have state changes
       * out of the expected order. For example, one transaction adds fragment A,
       * a second adds fragment B, then a third removes fragment A. Without removing the redundant
       * operations, fragment B could expect that while it is being created, fragment A will also
       * exist because fragment A will be removed after fragment B was added.
       * With removing redundant operations, fragment B cannot expect fragment A to exist when
       * it has been created because fragment A's add/remove will be optimized out.
       * <p>
       * It can also reorder the state changes of Fragments to allow for better Transitions.
       * Added Fragments may have {@link Fragment#onCreate(Bundle)} called before replaced
       * Fragments have {@link Fragment#onDestroy()} called.
       * <p>
       * The default is {@code false} for applications targeting version
       * versions prior to O and {@code true} for applications targeting O and
       * later.
       *
       * @param reorderingAllowed {@code true} to enable optimizing out redundant operations
       *                          or {@code false} to disable optimizing out redundant
       *                          operations on this transaction.
       */
      public abstract FragmentTransaction setReorderingAllowed(boolean reorderingAllowed);
  
      /**
       * Add a Runnable to this transaction that will be run after this transaction has
       * been committed. If fragment transactions are {@link #setReorderingAllowed(boolean) optimized}
       * this may be after other subsequent fragment operations have also taken place, or operations
       * in this transaction may have been optimized out due to the presence of a subsequent
       * fragment transaction in the batch.
       *
       *
       * <p>If a transaction is committed using {@link #commitAllowingStateLoss()} this runnable
       * may be executed when the FragmentManager is in a state where new transactions may not
       * be committed without allowing state loss.</p>
       *
       * <p><code>runOnCommit</code> may not be used with transactions
       * {@link #addToBackStack(String) added to the back stack} as Runnables cannot be persisted
       * with back stack state. {@link IllegalStateException} will be thrown if
       * {@link #addToBackStack(String)} has been previously called for this transaction
       * or if it is called after a call to <code>runOnCommit</code>.</p>
       *
       * @param runnable Runnable to add
       * @return this FragmentTransaction
       * @throws IllegalStateException if {@link #addToBackStack(String)} has been called
       */
      public abstract FragmentTransaction runOnCommit(Runnable runnable);
  
      /**
       * 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();
  
      /**
       * Commits this transaction synchronously. Any added fragments will be
       * initialized and brought completely to the lifecycle state of their host
       * and any removed fragments will be torn down accordingly before this
       * call returns. Committing a transaction in this way allows fragments
       * to be added as dedicated, encapsulated components that monitor the
       * lifecycle state of their host while providing firmer ordering guarantees
       * around when those fragments are fully initialized and ready. Fragments
       * that manage views will have those views created and attached.
       *
       * <p>Calling <code>commitNow</code> is preferable to calling
       * {@link #commit()} followed by {@link FragmentManager#executePendingTransactions()}
       * as the latter will have the side effect of attempting to commit <em>all</em>
       * currently pending transactions whether that is the desired behavior
       * or not.</p>
       *
       * <p>Transactions committed in this way may not be added to the
       * FragmentManager's back stack, as doing so would break other expected
       * ordering guarantees for other asynchronously committed transactions.
       * This method will throw {@link IllegalStateException} if the transaction
       * previously requested to be added to the back stack with
       * {@link #addToBackStack(String)}.</p>
       *
       * <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>
       */
      public abstract void commitNow();
  
      /**
       * Like {@link #commitNow} 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 void commitNowAllowingStateLoss();
  }
  