| /* |
| * 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.app.ActionBar; |
| import android.content.pm.PackageManager; |
| import android.os.Bundle; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.Toolbar; |
| |
| import androidx.annotation.Nullable; |
| import androidx.fragment.app.FragmentActivity; |
| |
| import com.android.settingslib.utils.BuildCompatUtils; |
| import com.android.settingslib.widget.R; |
| |
| import com.google.android.material.appbar.AppBarLayout; |
| import com.google.android.material.appbar.CollapsingToolbarLayout; |
| |
| /** |
| * A base Activity that has a collapsing toolbar layout is used for the activities intending to |
| * enable the collapsing toolbar function. |
| */ |
| public class CollapsingToolbarBaseActivity extends FragmentActivity { |
| |
| private class DelegateCallback implements CollapsingToolbarDelegate.HostCallback { |
| @Nullable |
| @Override |
| public ActionBar setActionBar(Toolbar toolbar) { |
| CollapsingToolbarBaseActivity.super.setActionBar(toolbar); |
| return CollapsingToolbarBaseActivity.super.getActionBar(); |
| } |
| |
| @Override |
| public void setOuterTitle(CharSequence title) { |
| CollapsingToolbarBaseActivity.super.setTitle(title); |
| } |
| } |
| |
| private CollapsingToolbarDelegate mToolbardelegate; |
| |
| private int mCustomizeLayoutResId = 0; |
| |
| @Override |
| protected void onCreate(@Nullable Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| // for backward compatibility on R devices or wearable devices due to small device size. |
| if (mCustomizeLayoutResId > 0 && (!BuildCompatUtils.isAtLeastS() || isWatch())) { |
| super.setContentView(mCustomizeLayoutResId); |
| return; |
| } |
| |
| View view = getToolbarDelegate().onCreateView(getLayoutInflater(), null); |
| super.setContentView(view); |
| } |
| |
| @Override |
| public void setContentView(int layoutResID) { |
| final ViewGroup parent = (mToolbardelegate == null) ? findViewById(R.id.content_frame) |
| : mToolbardelegate.getContentFrameLayout(); |
| if (parent != null) { |
| parent.removeAllViews(); |
| } |
| LayoutInflater.from(this).inflate(layoutResID, parent); |
| } |
| |
| @Override |
| public void setContentView(View view) { |
| final ViewGroup parent = (mToolbardelegate == null) ? findViewById(R.id.content_frame) |
| : mToolbardelegate.getContentFrameLayout(); |
| if (parent != null) { |
| parent.addView(view); |
| } |
| } |
| |
| @Override |
| public void setContentView(View view, ViewGroup.LayoutParams params) { |
| final ViewGroup parent = (mToolbardelegate == null) ? findViewById(R.id.content_frame) |
| : mToolbardelegate.getContentFrameLayout(); |
| if (parent != null) { |
| parent.addView(view, params); |
| } |
| } |
| |
| /** |
| * This method allows an activity to replace the default layout with a customize layout. Notice |
| * that it will no longer apply the features being provided by this class when this method |
| * gets called. |
| */ |
| protected void setCustomizeContentView(int layoutResId) { |
| mCustomizeLayoutResId = layoutResId; |
| } |
| |
| @Override |
| public void setTitle(CharSequence title) { |
| getToolbarDelegate().setTitle(title); |
| } |
| |
| @Override |
| public void setTitle(int titleId) { |
| setTitle(getText(titleId)); |
| } |
| |
| @Override |
| public boolean onNavigateUp() { |
| if (getSupportFragmentManager().getBackStackEntryCount() > 0) { |
| getSupportFragmentManager().popBackStackImmediate(); |
| } |
| |
| // Closes the activity if there is no fragment inside the stack. Otherwise the activity will |
| // has a blank screen since there is no any fragment. |
| if (getSupportFragmentManager().getBackStackEntryCount() == 0) { |
| finishAfterTransition(); |
| } |
| return true; |
| } |
| |
| @Override |
| public void onBackPressed() { |
| super.onBackPressed(); |
| |
| // Closes the activity if there is no fragment inside the stack. Otherwise the activity will |
| // has a blank screen since there is no any fragment. onBackPressed() in Activity.java only |
| // handles popBackStackImmediate(). This will close activity to avoid a blank screen. |
| if (getSupportFragmentManager().getBackStackEntryCount() == 0) { |
| finishAfterTransition(); |
| } |
| } |
| |
| /** |
| * Returns an instance of collapsing toolbar. |
| */ |
| @Nullable |
| public CollapsingToolbarLayout getCollapsingToolbarLayout() { |
| return getToolbarDelegate().getCollapsingToolbarLayout(); |
| } |
| |
| /** |
| * Return an instance of app bar. |
| */ |
| @Nullable |
| public AppBarLayout getAppBarLayout() { |
| return getToolbarDelegate().getAppBarLayout(); |
| } |
| |
| private boolean isWatch() { |
| PackageManager packageManager = getPackageManager(); |
| if (packageManager == null) { |
| return false; |
| } |
| return packageManager.hasSystemFeature(PackageManager.FEATURE_WATCH); |
| } |
| |
| private CollapsingToolbarDelegate getToolbarDelegate() { |
| if (mToolbardelegate == null) { |
| mToolbardelegate = new CollapsingToolbarDelegate(new DelegateCallback()); |
| } |
| return mToolbardelegate; |
| } |
| } |