Create a collapsing toolbar based activity
On Android S, each of subsetting pages will have a collapsing toolbar to
enlarge its title. However, there are many different pages from
differennt apps. So we extracted a base activity with collapsing toolbar
layout so it is easier to enbale a collapsing toolbar in their own
pages.
Bug: 179380824
Test: visual verified
Change-Id: Ic505d65320081589d1e1b5eb4bd2af7a06e60d39
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp b/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp
new file mode 100644
index 0000000..c23ff05
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp
@@ -0,0 +1,14 @@
+android_library {
+ name: "SettingsLibCollapsingToolbarBaseActivity",
+
+ srcs: ["src/**/*.java"],
+ resource_dirs: ["res"],
+
+ static_libs: [
+ "androidx.annotation_annotation",
+ "androidx.core_core",
+ "com.google.android.material_material",
+ ],
+ sdk_version: "system_current",
+ min_sdk_version: "21",
+}
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml
new file mode 100644
index 0000000..dabba68
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+ package="com.android.settingslib.collapsingtoolbar">
+
+ <uses-sdk android:minSdkVersion="21" />
+
+</manifest>
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/res/layout/collapsing_toolbar_base_layout.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/layout/collapsing_toolbar_base_layout.xml
new file mode 100644
index 0000000..e376930
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/layout/collapsing_toolbar_base_layout.xml
@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ 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.
+-->
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+ xmlns:android="http://schemas.android.com/apk/res/android"
+ xmlns:app="http://schemas.android.com/apk/res-auto"
+ android:id="@+id/content_parent"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent"
+ android:transitionGroup="true">
+
+ <com.google.android.material.appbar.AppBarLayout
+ android:id="@+id/app_bar"
+ android:layout_width="match_parent"
+ android:layout_height="180dp"
+ android:theme="@style/Theme.CollapsingToolbar.Settings">
+
+ <com.android.settingslib.collapsingtoolbar.AdjustableToolbarLayout
+ android:id="@+id/collapsing_toolbar"
+ android:background="?android:attr/colorPrimary"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent"
+ app:maxLines="3"
+ app:contentScrim="?android:attr/colorPrimary"
+ app:collapsedTitleTextAppearance="@style/CollapsingToolbarTitle.Collapsed"
+ app:statusBarScrim="?android:attr/colorPrimary"
+ app:layout_scrollFlags="scroll|exitUntilCollapsed"
+ app:expandedTitleMarginStart="18dp"
+ app:expandedTitleMarginEnd="18dp"
+ app:toolbarId="@id/action_bar">
+
+ <Toolbar
+ android:id="@+id/action_bar"
+ android:layout_width="match_parent"
+ android:layout_height="?attr/actionBarSize"
+ android:theme="?android:attr/actionBarTheme"
+ app:layout_collapseMode="pin"/>
+
+ </com.android.settingslib.collapsingtoolbar.AdjustableToolbarLayout>
+ </com.google.android.material.appbar.AppBarLayout>
+
+ <FrameLayout
+ android:id="@+id/content_frame"
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values-night/themes.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values-night/themes.xml
new file mode 100644
index 0000000..e20775e
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values-night/themes.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ 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.
+-->
+<resources>
+ <style name="Theme.CollapsingToolbar.Settings"
+ parent="@style/Theme.MaterialComponents.DayNight">
+ <item name="colorPrimary">@*android:color/primary_dark_device_default_settings</item>
+ <item name="colorAccent">@*android:color/accent_device_default_dark</item>
+ </style>
+</resources>
\ No newline at end of file
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/styles.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/styles.xml
new file mode 100644
index 0000000..e1a64d4
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/styles.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ 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.
+-->
+<resources>
+ <style name="CollapsingToolbarTitle.Collapsed"
+ parent="@android:style/TextAppearance.DeviceDefault.Widget.ActionBar.Title">
+ </style>
+
+ <style name="CollapsingToolbarTitle"
+ parent="@android:style/TextAppearance.DeviceDefault.Widget.ActionBar.Title">
+ <item name="android:textSize">36sp</item>
+ </style>
+
+ <style name="CollapsingToolbarTitle.MoreThanTwoLines">
+ <item name="android:textSize">24sp</item>
+ </style>
+</resources>
\ No newline at end of file
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/themes.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/themes.xml
new file mode 100644
index 0000000..de545b0
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/res/values/themes.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ 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.
+-->
+<resources>
+ <style name="Theme.CollapsingToolbar.Settings"
+ parent="@style/Theme.MaterialComponents.DayNight">
+ <item name="colorPrimary">@*android:color/primary_device_default_settings_light</item>
+ <item name="colorAccent">@*android:color/accent_device_default_light</item>
+ </style>
+</resources>
\ No newline at end of file
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/AdjustableToolbarLayout.java b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/AdjustableToolbarLayout.java
new file mode 100644
index 0000000..e75a978
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/AdjustableToolbarLayout.java
@@ -0,0 +1,92 @@
+/*
+ * 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.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.google.android.material.appbar.CollapsingToolbarLayout;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+/**
+ * A customized version of CollapsingToolbarLayout that can apply different font size based on
+ * the line count of its title.
+ */
+public class AdjustableToolbarLayout extends CollapsingToolbarLayout {
+
+ private static final int TOOLBAR_MAX_LINE_NUMBER = 2;
+
+ public AdjustableToolbarLayout(@NonNull Context context) {
+ this(context, null);
+
+ }
+
+ public AdjustableToolbarLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public AdjustableToolbarLayout(@NonNull Context context, @Nullable AttributeSet attrs,
+ int defStyleAttr) {
+ super(context, attrs, defStyleAttr);
+ initCollapsingToolbar();
+ }
+
+ private void initCollapsingToolbar() {
+ this.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
+ @Override
+ public void onLayoutChange(View v, int left, int top, int right, int bottom,
+ int oldLeft, int oldTop, int oldRight, int oldBottom) {
+ v.removeOnLayoutChangeListener(this);
+ final int count = getLineCount();
+ if (count > TOOLBAR_MAX_LINE_NUMBER) {
+ setExpandedTitleTextAppearance(R.style.CollapsingToolbarTitle_MoreThanTwoLines);
+ } else {
+ setExpandedTitleTextAppearance(R.style.CollapsingToolbarTitle);
+ }
+ }
+ });
+ }
+
+ /**
+ * Returns a number of title line count for CollapsingToolbarLayout so that facilitates the
+ * determination to apply what kind of font size. Since the title of CollapsingToolbarLayout is
+ * drawn in a canvas and the text process is wrapped in a CollapsingTextHelper, the way we used
+ * here is to get the line count from the CollapsingTextHelper via Java Reflection.
+ */
+ private int getLineCount() {
+ try {
+ final Field textHelperField = this.getClass().getDeclaredField("collapsingTextHelper");
+ textHelperField.setAccessible(true);
+ final Object textHelperObj = textHelperField.get(this);
+
+ final Field layoutField = textHelperObj.getClass().getDeclaredField("textLayout");
+ layoutField.setAccessible(true);
+ final Object layoutObj = layoutField.get(textHelperObj);
+
+ final Method method = layoutObj.getClass().getDeclaredMethod("getLineCount");
+ return (int) method.invoke(layoutObj);
+ } catch (Exception e) {
+ return 0;
+ }
+ }
+}
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java
new file mode 100644
index 0000000..637805f
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java
@@ -0,0 +1,99 @@
+/*
+ * 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.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.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 CollapsingToolbarLayout mCollapsingToolbarLayout;
+
+ @Override
+ protected void onCreate(@Nullable Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ super.setContentView(R.layout.collapsing_toolbar_base_layout);
+ mCollapsingToolbarLayout = findViewById(R.id.collapsing_toolbar);
+
+ final Toolbar toolbar = findViewById(R.id.action_bar);
+ setActionBar(toolbar);
+
+ // Enable title and home button by default
+ final ActionBar actionBar = getActionBar();
+ if (actionBar != null) {
+ actionBar.setDisplayHomeAsUpEnabled(true);
+ actionBar.setHomeButtonEnabled(true);
+ actionBar.setDisplayShowTitleEnabled(true);
+ }
+ }
+
+ @Override
+ public void setContentView(int layoutResID) {
+ final ViewGroup parent = findViewById(R.id.content_frame);
+ if (parent != null) {
+ parent.removeAllViews();
+ }
+ LayoutInflater.from(this).inflate(layoutResID, parent);
+ }
+
+ @Override
+ public void setContentView(View view) {
+ ((ViewGroup) findViewById(R.id.content_frame)).addView(view);
+ }
+
+ @Override
+ public void setContentView(View view, ViewGroup.LayoutParams params) {
+ ((ViewGroup) findViewById(R.id.content_frame)).addView(view, params);
+ }
+
+ @Override
+ public void setTitle(CharSequence title) {
+ if (mCollapsingToolbarLayout != null) {
+ mCollapsingToolbarLayout.setTitle(title);
+ }
+ super.setTitle(title);
+ }
+
+ @Override
+ public void setTitle(int titleId) {
+ if (mCollapsingToolbarLayout != null) {
+ mCollapsingToolbarLayout.setTitle(getText(titleId));
+ }
+ super.setTitle(titleId);
+ }
+
+ /**
+ * Returns an instance of collapsing toolbar.
+ */
+ public CollapsingToolbarLayout getCollapsingToolbarLayout() {
+ return mCollapsingToolbarLayout;
+ }
+}