blob: 6802b76388963129676fbe00343e8559f44273c4 [file] [log] [blame]
/*
* Copyright (C) 2020 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.wallpaper.picker;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import androidx.annotation.CallSuper;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import com.android.wallpaper.R;
import com.android.wallpaper.widget.BottomActionBar;
import com.android.wallpaper.widget.BottomActionBar.BottomActionBarHost;
/**
* Base class for Fragments that own a {@link BottomActionBar} widget.
*
* <p>A Fragment extending this class is expected to have a {@link BottomActionBar} in its activity
* which is a {@link BottomActionBarHost}, which can handle lifecycle management of
* {@link BottomActionBar} for extending fragment.
*
* <p>Or helping some fragments that own a {@link BottomActionBar} in fragment view to setup the
* common behavior for {@link BottomActionBar}.
*/
public class BottomActionBarFragment extends Fragment {
@Nullable private BottomActionBar mBottomActionBar;
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mBottomActionBar = findBottomActionBar();
if (mBottomActionBar != null) {
mBottomActionBar.reset();
onBottomActionBarReady(mBottomActionBar);
}
}
/** Returns {@code true} if the fragment would handle the event. */
public boolean onBackPressed() {
return false;
}
/**
* Gets called when {@link #onViewCreated} finished. For extending fragment, this is the only
* one interface to get {@link BottomActionBar}.
*/
@CallSuper
protected void onBottomActionBarReady(BottomActionBar bottomActionBar) {
// Needed for some cases that need to recreate the BottomActionBar.
mBottomActionBar = bottomActionBar;
bottomActionBar.bindBackButtonToSystemBackKey(getActivity());
}
@Nullable
private BottomActionBar findBottomActionBar() {
Activity activity = getActivity();
if (activity instanceof BottomActionBarHost) {
return ((BottomActionBarHost) activity).getBottomActionBar();
}
View root = getView();
if (root != null) {
return root.findViewById(R.id.bottom_actionbar);
}
return null;
}
}