Example usage for android.support.v4.app FragmentManager getBackStackEntryCount

Introduction

In this page you can find the example usage for android.support.v4.app FragmentManager getBackStackEntryCount.

Prototype

public abstract int getBackStackEntryCount();

Source Link

Document

Return the number of entries currently in the back stack.

Usage

From source file:com.vinexs.eeb.BaseActivity.java

public Fragment getTopFragment() {
    FragmentManager fragMgr = getSupportFragmentManager();
    FragmentManager.BackStackEntry backEntry = fragMgr
            .getBackStackEntryAt(fragMgr.getBackStackEntryCount() - 1);
    String backEntryName = backEntry.getName();
    return fragMgr.findFragmentByTag(backEntryName);
}

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From source file:com.kuassivi.october.util.Navigator.java

/**
 * Pops back to a specific BackStack position.
 * <p>/*  www  . j a va  2s .c  o m*/
 * It will detach and destroy forwarded Fragments.
 *
 * @param index index in the back stack entry
 */
public void popToStack(int index) {
    if (!(activity instanceof FragmentActivity)) {
        throw new RuntimeException("The activity must inherits from FragmentActivity or AppCompatActivity");
    }

    FragmentActivity fragmentActivity = (FragmentActivity) activity;
    FragmentManager fragmentManager = fragmentActivity.getSupportFragmentManager();

    /*
     * The method isFinishing() prevents to load a Fragment
     * when the activity is going to be killed or destroyed.
     */
    if (fragmentManager == null || fragmentActivity.isFinishing()) {
        return;
    }

    final int firstFragmentCount = 1;
    int backStackCount = fragmentManager.getBackStackEntryCount();

    if (backStackCount <= firstFragmentCount) {
        fragmentActivity.finish();
    } else {
        if (index > 0) {
            List<Fragment> fragments = fragmentManager.getFragments();
            this.fragment = fragments.get(index - 1);
            fragmentManager.popBackStackImmediate(index, FragmentManager.POP_BACK_STACK_INCLUSIVE);
        }
    }
}

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From source file:fe.up.pt.partner.FacebookActivity.java

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(this, callback);
    uiHelper.onCreate(savedInstanceState);

    Bundle b = getIntent().getExtras();/* w w  w  .ja va 2  s .  c  om*/
    title = b.getString("title");
    author = b.getString("author");
    rating = b.getString("rating");

    /*
     * este bloco  para imprimir a ash para depois se colocar no
     * site da app no facebook 
    */
    try {
        PackageInfo info = getPackageManager().getPackageInfo("fe.up.pt.partner",
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }

    if (savedInstanceState != null) {
        String name = savedInstanceState.getString(PENDING_ACTION_BUNDLE_KEY);
        pendingAction = PendingAction.valueOf(name);
    }

    setContentView(R.layout.main);

    loginButton = (LoginButton) findViewById(R.id.login_button);
    loginButton.setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() {
        @Override
        public void onUserInfoFetched(GraphUser user) {
            FacebookActivity.this.user = user;
            updateUI();
            // It's possible that we were waiting for this.user to be populated in order to post a
            // status update.
            handlePendingAction();

        }
    });

    profilePictureView = (ProfilePictureView) findViewById(R.id.profilePicture);
    text_box = (EditText) findViewById(R.id.share_text);
    postStatusUpdateButton = (Button) findViewById(R.id.postStatusUpdateButton);
    cancelButton = (Button) findViewById(R.id.cancel_button);

    postStatusUpdateButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            onClickPostStatusUpdate();

        }
    });
    cancelButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            finish();

        }
    });

    controlsContainer = (ViewGroup) findViewById(R.id.main_ui_container);

    final FragmentManager fm = getSupportFragmentManager();

    // Listen for changes in the back stack so we know if a fragment got popped off because the user
    // clicked the back button.
    fm.addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
        @Override
        public void onBackStackChanged() {
            if (fm.getBackStackEntryCount() == 0) {
                // We need to re-show our UI.
                controlsContainer.setVisibility(View.VISIBLE);
            }
        }
    });
}

---

From source file:org.mythdroid.activities.Recordings.java

@Override
protected void resetContentView() {

    final FragmentManager fm = getSupportFragmentManager();

    ArrayList<String> backStackFrags = new ArrayList<String>();

    // At this stage dualPane reflects the old configuration
    boolean dualPane = findViewById(R.id.recdetails) != null;

    /* The old backstack is useless now, save the relevant entries */
    int backStackSize = fm.getBackStackEntryCount();
    for (int i = 0; i < backStackSize; i++) {
        Fragment lf = fm.findFragmentById(R.id.reclistframe);
        Fragment df = fm.findFragmentById(R.id.recdetails);
        Fragment f = (!dualPane || df == null ? lf : df);
        backStackFrags.add(0, f.getClass().getName());
        fm.popBackStackImmediate();//from   w  w  w .j  a va  2  s . c o  m
    }

    setContentView(R.layout.recordings);
    dualPane = findViewById(R.id.recdetails) != null;

    // Now dualPane reflects the new configuration

    listFragment = new RecListFragment();

    fm.beginTransaction().replace(R.id.reclistframe, listFragment).commitAllowingStateLoss();
    fm.executePendingTransactions();

    listFragment.setAdapter(recordings);

    // Restore the backstack
    for (String frag : backStackFrags) {
        // RecListFragment has handled this..
        if (dualPane && frag.equals(RecDetailFragment.class.getName()))
            continue;
        try {
            FragmentTransaction ft = fm.beginTransaction();
            Fragment f = (Fragment) Class.forName(frag).newInstance();
            ft.replace((dualPane ? R.id.recdetails : R.id.reclistframe), f, f.getClass().getSimpleName())
                    .addToBackStack(null).commitAllowingStateLoss();
        } catch (Exception e) {
            ErrUtil.reportErr(this, e);
            return;
        }
    }

    fm.executePendingTransactions();

}

---

From source file:can.yrt.onebusaway.ArrivalsListActivity.java

@Override
protected void onResume() {
    super.onResume();
    boolean newFrag = mNewFragment;
    mNewFragment = false;//www.  j  a  v a2  s .  co m
    if (newFrag) {
        FragmentManager fm = getSupportFragmentManager();

        ArrivalsListFragment list = new ArrivalsListFragment();
        list.setArguments(FragmentUtils.getIntentArgs(getIntent()));

        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(android.R.id.content, list);
        // This is a bit of a hack, but if there's a backstack
        // it means people navigated away from this activity while
        // in a report problem fragment.
        // In this case, we *want* to be a part of the backstack;
        // otherwise we just want to clear everything out.
        if (fm.getBackStackEntryCount() > 0) {
            ft.addToBackStack(null);
        }
        ft.commit();
    }
}

---

From source file:com.vinexs.eeb.BaseActivity.java

public void addFragment(int viewId, Fragment fragment) {
    if (fragment.isAdded()) {
        return;//w w w  .  j ava 2s  .  c  o  m
    }
    FragmentManager fragMgr = getSupportFragmentManager();
    FragmentTransaction transaction = fragMgr.beginTransaction();
    BackStackEntry lastEntry = fragMgr.getBackStackEntryCount() == 0 ? null
            : fragMgr.getBackStackEntryAt(fragMgr.getBackStackEntryCount() - 1);
    // Transaction options
    String fragName = fragment.getClass().getSimpleName();
    String breadCrumbTitle;
    String breadCrumbShortTitle;
    Boolean addToBackStack = false;
    int animationEnter = 0;
    int animationExit = 0;
    // Fill options
    Bundle args = fragment.getArguments();
    if (args != null) {
        if (args.containsKey("animationEnter") && args.containsKey("animationExit")) {
            animationEnter = args.getInt("animationEnter");
            animationExit = args.getInt("animationExit");
        }
        if (args.containsKey("breadCrumbTitle")) {
            breadCrumbTitle = args.getString("breadCrumbTitle");
        } else {
            breadCrumbTitle = (lastEntry != null) ? lastEntry.getBreadCrumbTitle().toString()
                    : Utility.getAppName(this);
        }
        if (args.containsKey("breadCrumbShortTitle")) {
            breadCrumbShortTitle = args.getString("breadCrumbShortTitle");
        } else {
            breadCrumbShortTitle = (lastEntry != null) ? lastEntry.getBreadCrumbShortTitle().toString()
                    : Utility.getAppName(this);
        }
        if (args.containsKey("fragmentName")) {
            fragName = args.getString("fragmentName");
        }
        if (args.containsKey("addToBackStack")) {
            addToBackStack = args.getBoolean("addToBackStack");
        }
    } else {
        breadCrumbTitle = (lastEntry != null) ? lastEntry.getBreadCrumbTitle().toString()
                : Utility.getAppName(this);
        breadCrumbShortTitle = (lastEntry != null) ? lastEntry.getBreadCrumbShortTitle().toString()
                : Utility.getAppName(this);
    }
    // Set option to fragment manager
    if (animationEnter != 0 && animationExit != 0) {
        transaction.setCustomAnimations(animationEnter, animationExit);
    }
    if (breadCrumbTitle != null && !breadCrumbTitle.isEmpty()) {
        transaction.setBreadCrumbTitle(breadCrumbTitle);
    }
    if (breadCrumbShortTitle != null && !breadCrumbShortTitle.isEmpty()) {
        transaction.setBreadCrumbShortTitle(breadCrumbShortTitle);
    }
    if (transaction.isAddToBackStackAllowed() && addToBackStack) {
        transaction.addToBackStack(fragName);
    }
    // Add fragment
    transaction.add(viewId, fragment, fragName).commitAllowingStateLoss();
}

---

From source file:com.vinexs.eeb.BaseActivity.java

public void replaceFragment(int viewId, Fragment fragment) {
    if (fragment.isAdded()) {
        return;/*w  w  w.  ja v a2s .  co m*/
    }
    FragmentManager fragMgr = getSupportFragmentManager();
    FragmentTransaction transaction = fragMgr.beginTransaction();
    BackStackEntry lastEntry = fragMgr.getBackStackEntryCount() == 0 ? null
            : fragMgr.getBackStackEntryAt(fragMgr.getBackStackEntryCount() - 1);
    // Transaction options
    String fragName = fragment.getClass().getSimpleName();
    String breadCrumbTitle;
    String breadCrumbShortTitle;
    Boolean addToBackStack = true;
    int animationEnter = 0;
    int animationExit = 0;
    // Fill options
    Bundle args = fragment.getArguments();
    if (args != null) {
        if (args.containsKey("animationEnter") && args.containsKey("animationExit")) {
            animationEnter = args.getInt("animationEnter");
            animationExit = args.getInt("animationExit");
        }
        if (args.containsKey("breadCrumbTitle")) {
            breadCrumbTitle = args.getString("breadCrumbTitle");
        } else {
            breadCrumbTitle = (lastEntry != null) ? lastEntry.getBreadCrumbTitle().toString()
                    : Utility.getAppName(this);
        }
        if (args.containsKey("breadCrumbShortTitle")) {
            breadCrumbShortTitle = args.getString("breadCrumbShortTitle");
        } else {
            breadCrumbShortTitle = (lastEntry != null) ? lastEntry.getBreadCrumbShortTitle().toString()
                    : Utility.getAppName(this);
        }
        if (args.containsKey("fragmentName")) {
            fragName = args.getString("fragmentName");
        }
        if (args.containsKey("addToBackStack")) {
            addToBackStack = args.getBoolean("addToBackStack");
        }
    } else {
        breadCrumbTitle = (lastEntry != null) ? lastEntry.getBreadCrumbTitle().toString()
                : Utility.getAppName(this);
        breadCrumbShortTitle = (lastEntry != null) ? lastEntry.getBreadCrumbShortTitle().toString()
                : Utility.getAppName(this);
    }
    // Set option to fragment manager
    if (animationEnter != 0 && animationExit != 0) {
        transaction.setCustomAnimations(animationEnter, animationExit);
    }
    if (breadCrumbTitle != null && !breadCrumbTitle.isEmpty()) {
        transaction.setBreadCrumbTitle(breadCrumbTitle);
    }
    if (breadCrumbShortTitle != null && !breadCrumbShortTitle.isEmpty()) {
        transaction.setBreadCrumbShortTitle(breadCrumbShortTitle);
    }
    if (transaction.isAddToBackStackAllowed() && addToBackStack) {
        transaction.addToBackStack(fragName);
    }
    // Replace fragment
    transaction.replace(viewId, fragment, fragName).commitAllowingStateLoss();
}

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From source file:com.btmura.android.reddit.app.AbstractBrowserActivity.java

private void safePopBackStackImmediate() {
    FragmentManager fm = getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
        fm.removeOnBackStackChangedListener(this);
        fm.popBackStackImmediate();//from   ww w  .  j a v a  2s.  co m
        fm.addOnBackStackChangedListener(this);
    }
}

---

From source file:com.btmura.android.reddit.app.AbstractBrowserActivity.java

private void handleHome(MenuItem item) {
    FragmentManager fm = getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
        fm.popBackStack();// www.  j  a  v  a2s.c  o  m
    } else if ((bar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
        finish();
    }
}

---

From source file:bf.io.openshop.ux.MainActivity.java

/**
 * Method clear fragment backStack (back history). On bottom of stack will remain Fragment added by {@link #addInitialFragment()}.
 *//*from   w ww  .  j a  v a2 s.c  o m*/
private void clearBackStack() {
    Timber.d("Clearing backStack");
    FragmentManager manager = getSupportFragmentManager();
    if (manager.getBackStackEntryCount() > 0) {
        if (BuildConfig.DEBUG) {
            for (int i = 0; i < manager.getBackStackEntryCount(); i++) {
                Timber.d("BackStack content_%d= id: %d, name: %s", i, manager.getBackStackEntryAt(i).getId(),
                        manager.getBackStackEntryAt(i).getName());
            }
        }
        FragmentManager.BackStackEntry first = manager.getBackStackEntryAt(0);
        manager.popBackStack(first.getId(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }
    Timber.d("backStack cleared.");
    //        TODO maybe implement own fragment backStack handling to prevent banner fragment recreation during clearing.
    //        http://stackoverflow.com/questions/12529499/problems-with-android-fragment-back-stack
}

---

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