android.app.FragmentTransaction#commitAllowingStateLoss ( )源码实例Demo

/**
 * Add search fragment.  Note this is called during onLayout, so there's some restrictions,
 * such as executePendingTransaction can't be used in it.
 */
private void addSearchFragment() {
    // In order to take full advantage of "fragment deferred start", we need to create the
    // search fragment after all other fragments are created.
    // The other fragments are created by the ViewPager on the first onMeasure().
    // We use the first onLayout call, which is after onMeasure().

    // Just return if the fragment is already created, which happens after configuration
    // changes.
    if (mSearchFragment != null) return;

    final FragmentTransaction ft = getFragmentManager().beginTransaction();
    final Fragment searchFragment = new PhoneNumberPickerFragment();

    searchFragment.setUserVisibleHint(false);
    ft.add(R.id.dialtacts_frame, searchFragment);
    ft.hide(searchFragment);
    ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm, Intent includeApps) {
    final Bundle args = new Bundle();
    args.putParcelable(EXTRA_INCLUDE_APPS, includeApps);

    final RootsFragment fragment = new RootsFragment();
    fragment.setArguments(args);

    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_roots, fragment);
    ft.commitAllowingStateLoss();
}
 

public static void commitFragment(@NonNull FragmentManager fragmentManager, @NonNull FragmentTransaction transaction, boolean commitNow) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        if (commitNow) {
            transaction.commitNowAllowingStateLoss();
        } else {
            transaction.commitAllowingStateLoss();
        }
    } else {
        transaction.commitAllowingStateLoss();
        if (commitNow) {
            fragmentManager.executePendingTransactions();
        }
    }
}
 

/**
 * トークンデータの詳細を表示する.
 * @param token トークンデータ
 */
private void openAccessTokenDescription(final SQLiteToken token) {
    AccessTokenDescriptionFragment f = new AccessTokenDescriptionFragment();
    Bundle bundle = new Bundle();
    bundle.putString(AccessTokenDescriptionFragment.EXTRA_CLIENT_ID,
            token.getClientId());
    f.setArguments(bundle);
    FragmentManager fm = getActivity().getFragmentManager();
    FragmentTransaction t = fm.beginTransaction();
    t.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
    t.add(android.R.id.content, f, "description");
    t.addToBackStack("tokenList");
    t.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm) {
    final PickFragment fragment = new PickFragment();

    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_save, fragment, TAG);
    ft.commitAllowingStateLoss();
}
 

@Override
public boolean startFragment(@NonNull UriRequest request, @NonNull Bundle bundle) throws ActivityNotFoundException, SecurityException {
    String fragmentClassName = request.getStringField(FragmentTransactionHandler.FRAGMENT_CLASS_NAME);
    if (TextUtils.isEmpty(fragmentClassName)) {
        Debugger.fatal("FragmentTransactionHandler.handleInternal()应返回的带有ClassName");
        return false;
    }
    if (mContainerViewId == 0) {
        Debugger.fatal("FragmentTransactionHandler.handleInternal()mContainerViewId");
        return false;
    }
    try {
        Fragment fragment = Fragment.instantiate(request.getContext(), fragmentClassName, bundle);
        if (fragment == null) {
            return false;
        }

        FragmentTransaction transaction = mFragmentManager.beginTransaction();
        switch (mStartType) {
            case TYPE_ADD:
                transaction.add(mContainerViewId, fragment, mTag);
                break;
            case TYPE_REPLACE:
                transaction.replace(mContainerViewId, fragment, mTag);
                break;
        }
        if (mAllowingStateLoss) {
            transaction.commitAllowingStateLoss();
        } else {
            transaction.commit();
        }
        return true;
    } catch (Exception e) {
        Debugger.e(e);
        return false;
    }
}
 

/**清空所有除了带此tag的fragment*/
public void removeAllExcept(String tag){
    FragmentTransaction ft = fm.beginTransaction();
    for (Fragment f:fs) {
        if(f.getTag()!=null&&!f.getTag().equals(tag))ft.remove(f);
    }
    ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm, String mimeType, String displayName) {
	final Bundle args = new Bundle();
	args.putString(EXTRA_MIME_TYPE, mimeType);
	args.putString(EXTRA_DISPLAY_NAME, displayName);

	final SaveFragment fragment = new SaveFragment();
	fragment.setArguments(args);

	final FragmentTransaction ft = fm.beginTransaction();
	ft.replace(R.id.container_save, fragment, TAG);
	ft.commitAllowingStateLoss();
}
 

private void replaceFragmentVideoByAudio() {
	audioCallFragment = new CallAudioFragment();
	FragmentTransaction transaction = getFragmentManager().beginTransaction();
	transaction.replace(R.id.fragmentContainer, audioCallFragment);
	try {
		transaction.commitAllowingStateLoss();
	} catch (Exception e) {
	}
}
 

private void replaceFragmentAudioByVideo() {
//		Hiding controls to let displayVideoCallControlsIfHidden add them plus the callback
		videoCallFragment = new CallVideoFragment();

		FragmentTransaction transaction = getFragmentManager().beginTransaction();
		transaction.replace(R.id.fragmentContainer, videoCallFragment);
		try {
			transaction.commitAllowingStateLoss();
		} catch (Exception e) {
		}
	}
 

public static void show(FragmentManager fm, ArrayList<DocumentInfo> docs, boolean deleteAfter) {
	final Bundle args = new Bundle();
	args.putParcelableArrayList(EXTRA_DOC_LIST, docs);
	args.putBoolean(EXTRA_DELETE_AFTER, deleteAfter);
	
	final MoveFragment fragment = new MoveFragment();
	fragment.setArguments(args);

	final FragmentTransaction ft = fm.beginTransaction();
	ft.replace(R.id.container_save, fragment, TAG);
	ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm, Intent includeApps) {
    final Bundle args = new Bundle();
    args.putParcelable(EXTRA_INCLUDE_APPS, includeApps);

    final RootsFragment fragment = new RootsFragment();
    fragment.setArguments(args);

    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_roots, fragment);
    ft.commitAllowingStateLoss();
}
 

public void show(@NonNull final FragmentManager manager) {
    FragmentTransaction transaction = manager.beginTransaction();
    Fragment prev = manager.findFragmentByTag(DIALOG_TAG);
    if (prev != null) {
        transaction.remove(prev);
    }

    transaction.add(this, DIALOG_TAG);
    transaction.commitAllowingStateLoss();
    manager.executePendingTransactions();
}
 

public static void show(FragmentManager fm, ArrayList<DocumentInfo> docs, boolean deleteAfter) {
	final Bundle args = new Bundle();
	args.putParcelableArrayList(EXTRA_DOC_LIST, docs);
	args.putBoolean(EXTRA_DELETE_AFTER, deleteAfter);
	
	final MoveFragment fragment = new MoveFragment();
	fragment.setArguments(args);

	final FragmentTransaction ft = fm.beginTransaction();
	ft.replace(R.id.container_save, fragment, TAG);
	ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm, RootInfo root) {
    final ServerFragment fragment = new ServerFragment();
    final Bundle args = new Bundle();
    args.putParcelable(EXTRA_ROOT, root);
    fragment.setArguments(args);
    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_directory, fragment);
    ft.commitAllowingStateLoss();
}
 

/**
 * Hides every tab and shows search UI for phone lookup.
 */
private void enterSearchUi() {
    if (mSearchFragment == null) {
        // We add the search fragment dynamically in the first onLayoutChange() and
        // mSearchFragment is set sometime later when the fragment transaction is actually
        // executed, which means there's a window when users are able to hit the (physical)
        // search key but mSearchFragment is still null.
        // It's quite hard to handle this case right, so let's just ignore the search key
        // in this case.  Users can just hit it again and it will work this time.
        return;
    }
    if (mSearchView == null) {
        prepareSearchView();
    }

    final ActionBar actionBar = getActionBar();

    final Tab tab = actionBar.getSelectedTab();

    // User can search during the call, but we don't want to remember the status.
    if (tab != null && !DialpadFragment.phoneIsInUse()) {
        mLastManuallySelectedFragment = tab.getPosition();
    }

    mSearchView.setQuery(null, true);

    actionBar.setDisplayShowCustomEnabled(true);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    actionBar.setDisplayShowHomeEnabled(true);
    actionBar.setDisplayHomeAsUpEnabled(true);

    updateFakeMenuButtonsVisibility(false);

    for (int i = 0; i < TAB_INDEX_COUNT; i++) {
        sendFragmentVisibilityChange(i, false /* not visible */ );
    }

    // Show the search fragment and hide everything else.
    mSearchFragment.setUserVisibleHint(true);
    final FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.show(mSearchFragment);
    transaction.commitAllowingStateLoss();
    mViewPager.setVisibility(View.GONE);

    // We need to call this and onActionViewCollapsed() manually, since we are using a custom
    // layout instead of asking the search menu item to take care of SearchView.
    mSearchView.onActionViewExpanded();
    mInSearchUi = true;
}
 

private void changeFragment(Fragment newFragment) {
	hideKeyboard();
	FragmentTransaction transaction = getFragmentManager().beginTransaction();
	transaction.replace(R.id.fragment_container, newFragment);
	transaction.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm) {
    final ConnectionsFragment fragment = new ConnectionsFragment();
    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_directory, fragment, TAG);
    ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm) {
    final RecentsCreateFragment fragment = new RecentsCreateFragment();
    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_directory, fragment);
    ft.commitAllowingStateLoss();
}
 

protected void changeFragment(Fragment fragment, String name, boolean isChild) {
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction();

    if (transaction.isAddToBackStackAllowed()) {
        int count = fragmentManager.getBackStackEntryCount();
        if (count > 0) {
            FragmentManager.BackStackEntry entry =
                    fragmentManager.getBackStackEntryAt(count - 1);

            if (entry != null && name.equals(entry.getName())) {
                fragmentManager.popBackStack();
                if (!isChild) {
                    // We just removed it's duplicate from the back stack
                    // And we want at least one in it
                    transaction.addToBackStack(name);
                }
            }
        }

        if (isChild) {
            transaction.addToBackStack(name);
        }
    }

    if (getResources().getBoolean(R.bool.hide_bottom_bar_on_second_level_views)) {
        if (isChild) {
            if (!isTablet()) {
                hideTabBar();
            }
        } else {
            showTabBar();
        }
    }

    Compatibility.setFragmentTransactionReorderingAllowed(transaction, false);
    if (isChild && isTablet()) {
        transaction.replace(R.id.fragmentContainer2, fragment, name);
        findViewById(R.id.fragmentContainer2).setVisibility(View.VISIBLE);
    } else {
        transaction.replace(R.id.fragmentContainer, fragment, name);
    }
    transaction.commitAllowingStateLoss();
    fragmentManager.executePendingTransactions();
}