androidx.fragment.app.FragmentTransaction#remove ( )源码实例Demo

/**
 * Builds and displays a licenses fragment for you. Requires "/res/raw/licenses.html" and
 * "/res/layout/licenses_fragment.xml" to be present.
 *
 * @param fm A fragment manager instance used to display this LicensesFragment.
 */
public static void displayLicensesFragment(FragmentManager fm, @RawRes int htmlResToShow, String title) {
    FragmentTransaction ft = fm.beginTransaction();
    Fragment prev = fm.findFragmentByTag(FRAGMENT_TAG);
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);

    // Create and show the dialog.
    final DialogFragment newFragment;
    if (TextUtils.isEmpty(title)) {
        newFragment = LicensesFragment.newInstance(htmlResToShow);
    } else {
        newFragment = LicensesFragment.newInstance(htmlResToShow, title);
    }
    newFragment.show(ft, FRAGMENT_TAG);
}
 

protected void addFirstSettingsFragment() {
	Bundle args = new Bundle(1);
	args.putString("resource", getResources().getStringArray(R.array.settings_headers_fragments)[0]);
	
	Fragment existingFragment = getSupportFragmentManager().findFragmentById(R.id.settings_fragment_container);
	
	StockPreferenceFragment newFragment = new StockPreferenceFragment();
	newFragment.setArguments(args);
	
	FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
	
	if (existingFragment != null) {
		transaction.remove(existingFragment);
	}
	
	transaction.add(R.id.settings_fragment_container, newFragment);
	transaction.commit();
}
 

/**
 * Shows the dialog. Results will be forwarded to the activity supplied.
 * The tag can be used to identify the dialog in {@link OnDialogResultListener#onResult}
 * An optional argument can be used to remove a previously shown dialog with the tag given
 * prior to showing this one.
 *
 * @param activity the hosting activity
 * @param tag the dialogs tag
 * @param replaceTag removes the dialog with the given tag if specified
 */
public void show(FragmentActivity activity, String tag, String replaceTag){
    FragmentManager manager = activity.getSupportFragmentManager();
    Fragment existing = manager.findFragmentByTag(replaceTag);
    if (existing != null) {
        FragmentManager otherManager = existing.getFragmentManager();
        if (otherManager != null) {
            FragmentTransaction ft = otherManager.beginTransaction();
            ft.remove(existing);
            ft.commit();
        }
    }
    try {
        super.show(manager, tag);
    } catch (IllegalStateException ignored) {
    }
}
 

/**
 * Shows the dialog. Results will be forwarded to the activity supplied.
 * The tag can be used to identify the dialog in {@link OnDialogResultListener#onResult}
 * An optional argument can be used to remove a previously shown dialog with the tag given
 * prior to showing this one.
 *
 * @param activity the hosting activity
 * @param tag the dialogs tag
 * @param replaceTag removes the dialog with the given tag if specified
 */
public void show(FragmentActivity activity, String tag, String replaceTag){
    FragmentManager manager = activity.getSupportFragmentManager();
    Fragment existing = manager.findFragmentByTag(replaceTag);
    if (existing != null) {
        FragmentManager otherManager = existing.getFragmentManager();
        if (otherManager != null) {
            FragmentTransaction ft = otherManager.beginTransaction();
            ft.remove(existing);
            ft.commit();
        }
    }
    try {
        super.show(manager, tag);
    } catch (IllegalStateException ignored) {
    }
}
 

/**
 * Toggle API drawer
 */
public void showAPIDrawer(boolean b) {

    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_left, R.anim.slide_out_left,
            R.anim.slide_out_left);

    if (b) {
        webviewFragment = new APIWebviewFragment();
        Bundle bundle = new Bundle();
        bundle.putString("url", "http://localhost:8585/reference.html");
        webviewFragment.setArguments(bundle);
        ft.add(R.id.fragmentWebview, webviewFragment).addToBackStack(null);

        editorFragment.getView().animate().translationX(-50).setDuration(500).start();
    } else {
        editorFragment.getView().animate().translationX(0).setDuration(500).start();
        ft.remove(webviewFragment);
    }

    ft.commit();
}
 

@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
    if (mUpdateFlag) {
        Fragment fragment = (Fragment) super.instantiateItem(container, position);
        String tag = fragment.getTag();
        FragmentTransaction transaction = mFragmentManager.beginTransaction();
        transaction.remove(fragment);
        fragment = getItem(position);
        if (!fragment.isAdded()) {
            transaction.add(container.getId(), fragment, tag)
                    .attach(fragment)
                    .commitAllowingStateLoss();
        }
        return fragment;
    }
    return super.instantiateItem(container, position);
}
 

/**
 * Shows the dialog. Results will be forwarded to the fragment supplied.
 * The tag can be used to identify the dialog in {@link OnDialogResultListener#onResult}
 * An optional argument can be used to remove a previously shown dialog with the tag given
 * prior to showing this one.
 *
 * @param fragment the hosting fragment
 * @param tag the dialogs tag
 * @param replaceTag removes the dialog with the given tag if specified
 */
public void show(Fragment fragment, String tag, String replaceTag){
    FragmentManager manager = fragment.getFragmentManager();
    if (manager != null) {
        Fragment existing = manager.findFragmentByTag(replaceTag);
        if (existing != null){
            FragmentManager otherManager = existing.getFragmentManager();
            if (otherManager != null) {
                FragmentTransaction ft = otherManager.beginTransaction();
                ft.remove(existing);
                ft.commit();
            }
        }
        setTargetFragment(fragment, -1);
        try {
            super.show(manager, tag);
        } catch (IllegalStateException ignored) {
        }
    }
}
 

/**
 * Shows a specific preference fragment.
 *
 * @param navigationPreference
 *         The navigation preference, the fragment, which should be shown, is associated with,
 *         as an instance of the class {@link NavigationPreference}. The navigation preference
 *         may not be null
 * @param fragment
 *         The fragment, which should be shown, as an instance of the class Fragment. The
 *         fragment may not be null
 */
private void showPreferenceFragment(@NonNull final NavigationPreference navigationPreference,
                                    @NonNull final Fragment fragment) {
    fragment.setRetainInstance(true);
    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

    if (!isSplitScreen()) {
        transaction.hide(navigationFragment);

        if (preferenceFragment != null) {
            transaction.remove(preferenceFragment);
            notifyOnPreferenceFragmentHidden(preferenceFragment);
        }

        transaction.add(R.id.navigation_fragment_container, fragment, PREFERENCE_FRAGMENT_TAG);
    } else {
        if (preferenceFragment != null) {
            notifyOnPreferenceFragmentHidden(preferenceFragment);
        }

        transaction
                .replace(R.id.preference_fragment_container, fragment, PREFERENCE_FRAGMENT_TAG);
    }

    transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
    transaction.commit();
    this.preferenceFragment = fragment;
    showToolbarNavigationIcon();
    adaptBreadCrumbVisibility(selectedPreferenceFragmentArguments);
    notifyOnPreferenceFragmentShown(navigationPreference, fragment);
}
 

public FragmentTransaction removePreviousFragment(String tag) {
    FragmentTransaction transaction = genericFragmentManager.beginTransaction();
    Fragment previousFragment = genericFragmentManager.findFragmentByTag(tag);
    if (previousFragment != null) {
        transaction.remove(previousFragment);
    }
    transaction.addToBackStack(null);

    return transaction;
}
 

public static void showInAppBillingDialog(@NonNull FragmentManager fm,
                                          int type, @NonNull String key, @NonNull String[] productId,
                                          int[] productCount) {
    FragmentTransaction ft = fm.beginTransaction();
    Fragment prev = fm.findFragmentByTag(TAG);
    if (prev != null) {
        ft.remove(prev);
    }

    try {
        DialogFragment dialog = InAppBillingFragment.newInstance(type, key, productId, productCount);
        dialog.show(ft, TAG);
    } catch (IllegalArgumentException | IllegalStateException ignored) {
    }
}
 

@SuppressLint("InflateParams")
protected void showJoinConferenceDialog(final String prefilledJid) {
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    Fragment prev = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DIALOG);
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);
    JoinConferenceDialog joinConferenceFragment = JoinConferenceDialog.newInstance(prefilledJid, mActivatedAccounts, xmppConnectionService.multipleAccounts());
    joinConferenceFragment.show(ft, FRAGMENT_TAG_DIALOG);
}
 

protected void addHeadersFragment() {
	Fragment existingFragment = getSupportFragmentManager().findFragmentById(R.id.settings_fragment_container);
	
	SettingsHeadersFragment newFragment = new SettingsHeadersFragment();
	FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
	transaction.add(isMultiPane() ? R.id.settings_list_fragment_container : R.id.settings_fragment_container, newFragment);
	
	if (!isMultiPane() && existingFragment != null) {
		transaction.remove(existingFragment);
	}
	
	transaction.commit();
}
 

private void notice(String title, String content, Context c) {

        if (c == null)
            return;
        NLog.d(TAG, "saying dialog");
        Bundle b = new Bundle();
        b.putString("title", title);
        b.putString("content", content);
        synchronized (lock) {
            try {

                DialogFragment df = new SayingDialogFragment();
                df.setArguments(b);

                FragmentActivity fa = (FragmentActivity) c;
                FragmentManager fm = fa.getSupportFragmentManager();
                FragmentTransaction ft = fm.beginTransaction();

                Fragment prev = fm.findFragmentByTag(dialogTag);
                if (prev != null) {
                    ft.remove(prev);
                }

                ft.commit();
                df.show(fm, dialogTag);
                this.df = df;
            } catch (Exception e) {
                NLog.e(this.getClass().getSimpleName(), NLog.getStackTraceString(e));

            }

        }

    }
 

/**
 * Builds and displays a licenses fragment for you. Requires "/res/raw/licenses.html" and
 * "/res/layout/licenses_fragment.xml" to be present.
 *
 * @param fm A fragment manager instance used to display this LicensesFragment.
 */
public static void displayLicensesFragment(FragmentManager fm) {
    FragmentTransaction ft = fm.beginTransaction();
    Fragment prev = fm.findFragmentByTag(FRAGMENT_TAG);
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);

    // Create and show the dialog.
    DialogFragment newFragment = PrivacyPolicyFragment.newInstance();
    newFragment.show(ft, FRAGMENT_TAG);
}
 

private void removeDebugFragment() {
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.remove(mDebugFragment);
    ft.commit();

    debugFramentIsVisible = false;
}
 

private void addOrReplace(@NonNull FragmentTransaction transaction, @NonNull Fragment newFragment, @NonNull Item item) {
    FragmentManager manager = getSupportFragmentManager();
    Fragment fragment = manager.findFragmentByTag(item.tag);
    if (fragment != null) transaction.remove(fragment);

    transaction.add(R.id.main_container, newFragment, item.tag);
}
 

@Override
public void finish() {
    super.finish();
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    for (int id : mActualFragments.keySet()) {
        Fragment fragment = fragmentManager.findFragmentByTag(id + "_key");
        if (fragment != null) {
            fragmentTransaction.remove(fragment);
        }
    }
    fragmentTransaction.commitAllowingStateLoss();
    RootUtils.closeSU();
}
 

protected void showEnterJidDialog() {
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);
    EnterJidDialog dialog = EnterJidDialog.newInstance(
            null,
            getString(R.string.block_jabber_id),
            getString(R.string.block),
            null,
            account.getJid().asBareJid().toEscapedString(),
            true,
            xmppConnectionService.multipleAccounts(),
            false
    );

    dialog.setOnEnterJidDialogPositiveListener((accountJid, contactJid) -> {
        Blockable blockable = new RawBlockable(account, contactJid);
        if (xmppConnectionService.sendBlockRequest(blockable, false)) {
            ToastCompat.makeText(BlocklistActivity.this, R.string.corresponding_conversations_closed, Toast.LENGTH_SHORT).show();
        }
        return true;
    });
    dialog.show(ft, "dialog");
}
 

private void finishScene(String tag, TransitionHelper transitionHelper) {
    FragmentManager fragmentManager = getSupportFragmentManager();

    // Get scene
    Fragment scene = fragmentManager.findFragmentByTag(tag);
    if (scene == null) {
        Log.e(TAG, "finishScene: Can't find scene by tag: " + tag);
        return;
    }

    // Get scene index
    int index = mSceneTagList.indexOf(tag);
    if (index < 0) {
        Log.e(TAG, "finishScene: Can't find the tag in tag list: " + tag);
        return;
    }

    if (mSceneTagList.size() == 1) {
        // It is the last fragment, finish Activity now
        Log.i(TAG, "finishScene: It is the last scene, finish activity now");
        finish();
        return;
    }

    Fragment next = null;
    if (index == mSceneTagList.size() - 1) {
        // It is first fragment, show the next one
        next = fragmentManager.findFragmentByTag(mSceneTagList.get(index - 1));
    }

    FragmentTransaction transaction = fragmentManager.beginTransaction();
    if (next != null) {
        if (transitionHelper == null || !transitionHelper.onTransition(
                this, transaction, scene, next)) {
            // Clear shared item
            scene.setSharedElementEnterTransition(null);
            scene.setSharedElementReturnTransition(null);
            scene.setEnterTransition(null);
            scene.setExitTransition(null);
            next.setSharedElementEnterTransition(null);
            next.setSharedElementReturnTransition(null);
            next.setEnterTransition(null);
            next.setExitTransition(null);
            // Do not show animate if it is not the first fragment
            transaction.setCustomAnimations(R.anim.scene_close_enter, R.anim.scene_close_exit);
        }
        // Attach fragment
        transaction.attach(next);
    }
    transaction.remove(scene);
    transaction.commitAllowingStateLoss();
    onTransactScene();

    // Remove tag
    mSceneTagList.remove(index);

    // Return result
    if (scene instanceof SceneFragment) {
        ((SceneFragment) scene).returnResult(this);
    }
}
 

public void dismiss() {

        synchronized (lock) {
            NLog.d(TAG, "trying dissmiss dialog");


            if (df != null && df.getActivity() != null) {
                NLog.d(TAG, "dissmiss dialog");

                try {
                    FragmentActivity fa = (FragmentActivity) (df.getActivity());
                    FragmentManager fm = fa.getSupportFragmentManager();
                    FragmentTransaction ft = fm.beginTransaction();

                    Fragment prev = fm.findFragmentByTag(dialogTag);
                    if (prev != null) {
                        ft.remove(prev);

                    }

                    ft.commit();
                } catch (Exception e) {
                    NLog.e(this.getClass().getSimpleName(), NLog.getStackTraceString(e));
                }

                df = null;


            } else {
                df = null;
            }

        }
    }