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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settingslib.collapsingtoolbar;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.Toolbar;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.fragment.app.Fragment;
import com.google.android.material.appbar.AppBarLayout;
import com.google.android.material.appbar.CollapsingToolbarLayout;
/**
* A base fragment that has a collapsing toolbar layout for enabling the collapsing toolbar design.
*/
public abstract class CollapsingToolbarBaseFragment extends Fragment {
private static final float TOOLBAR_LINE_SPACING_MULTIPLIER = 1.1f;
@Nullable
private CoordinatorLayout mCoordinatorLayout;
@Nullable
private CollapsingToolbarLayout mCollapsingToolbarLayout;
@Nullable
private AppBarLayout mAppBarLayout;
@NonNull
private Toolbar mToolbar;
@NonNull
private FrameLayout mContentFrameLayout;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.collapsing_toolbar_base_layout, container,
false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
mCoordinatorLayout = view.findViewById(R.id.content_parent);
}
mCollapsingToolbarLayout = view.findViewById(R.id.collapsing_toolbar);
mAppBarLayout = view.findViewById(R.id.app_bar);
if (mCollapsingToolbarLayout != null) {
mCollapsingToolbarLayout.setLineSpacingMultiplier(TOOLBAR_LINE_SPACING_MULTIPLIER);
}
disableCollapsingToolbarLayoutScrollingBehavior();
mToolbar = view.findViewById(R.id.action_bar);
mContentFrameLayout = view.findViewById(R.id.content_frame);
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
requireActivity().setActionBar(mToolbar);
}
/**
* Return an instance of CoordinatorLayout.
*/
@Nullable
public CoordinatorLayout getCoordinatorLayout() {
return mCoordinatorLayout;
}
/**
* Return an instance of app bar.
*/
@Nullable
public AppBarLayout getAppBarLayout() {
return mAppBarLayout;
}
/**
* Return the collapsing toolbar layout.
*/
@Nullable
public CollapsingToolbarLayout getCollapsingToolbarLayout() {
return mCollapsingToolbarLayout;
}
/**
* Return the content frame layout.
*/
@NonNull
public FrameLayout getContentFrameLayout() {
return mContentFrameLayout;
}
private void disableCollapsingToolbarLayoutScrollingBehavior() {
if (mAppBarLayout == null) {
return;
}
final CoordinatorLayout.LayoutParams params =
(CoordinatorLayout.LayoutParams) mAppBarLayout.getLayoutParams();
final AppBarLayout.Behavior behavior = new AppBarLayout.Behavior();
behavior.setDragCallback(
new AppBarLayout.Behavior.DragCallback() {
@Override
public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
return false;
}
});
params.setBehavior(behavior);
}
}
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