71 lines
2.2 KiB
Java
71 lines
2.2 KiB
Java
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settingslib.collapsingtoolbar;
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import androidx.fragment.app.FragmentActivity;
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import androidx.preference.PreferenceFragmentCompat;
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import com.android.settingslib.utils.BuildCompatUtils;
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import com.google.android.material.appbar.AppBarLayout;
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/**
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* A base fragment that supports multi-fragments in one activity. The activity likes to switch the
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* different fragments which extend this base fragment and must use the following code to add the
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* fragment to stack.
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*
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* protected void onCreate(Bundle savedState) {
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* // omitted…
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* getFragmentManager()
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* .beginTransaction()
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* .add(R.id.content_frame, new Your_Fragment())
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* // Add root page to back-history
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* .addToBackStack( null)
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* .commit();
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* // omitted
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* }
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*/
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public abstract class BasePreferencesFragment extends PreferenceFragmentCompat {
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/**
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* Gets the title which the fragment likes to show on app bar. The child class must implement
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* this
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* function.
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*
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* @return The title of the fragment will show on app bar.
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*/
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public abstract CharSequence getTitle();
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@Override
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public void onResume() {
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super.onResume();
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FragmentActivity activity = getActivity();
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if (activity != null) {
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activity.setTitle(getTitle());
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if (BuildCompatUtils.isAtLeastS()) {
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AppBarLayout appBarLayout = (AppBarLayout) activity.findViewById(R.id.app_bar);
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if (appBarLayout != null) {
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appBarLayout.setExpanded(/* expanded= */ true);
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}
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}
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}
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}
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}
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