fix: 首次提交

SettingsLib/ActionBarShadow/Android.bp

@@ -0,0 +1,33 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_library {
+    name: "SettingsLibActionBarShadow",
+    use_resource_processor: true,
+    defaults: [
+        "SettingsLintDefaults",
+    ],
+
+    srcs: ["src/**/*.java"],
+
+    static_libs: [
+        "androidx.annotation_annotation",
+        "androidx.lifecycle_lifecycle-runtime",
+        "androidx.recyclerview_recyclerview",
+    ],
+
+    sdk_version: "system_current",
+    min_sdk_version: "28",
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.adservices",
+        "com.android.extservices",
+        "com.android.permission",
+    ],
+}

SettingsLib/ActionBarShadow/AndroidManifest.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2018 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.widget.actionbarshadow">
+
+</manifest>

SettingsLib/ActionBarShadow/build.gradle

@@ -0,0 +1,54 @@
+/**
+ * Include this gradle file if you are building against this as a standalone gradle library project,
+ * as opposed to building it as part of the git-tree. This is typically the file you want to include
+ * if you create a new project in Android Studio.
+ *
+ * For example, you can include the following in your settings.gradle file:
+ *      include ':setupcompat'
+ *      project(':setupcompat').projectDir = new File(PATH_TO_THIS_DIRECTORY)
+ *
+ * And then you can include the :setupcompat project as one of your dependencies
+ *      dependencies {
+ *          implementation project(path: ':setupcompat')
+ *      }
+ */
+
+plugins {
+    alias(libs.plugins.android.library)
+    alias(libs.plugins.kotlin.android)
+}
+
+android {
+    // Not specifying compileSdkVersion here so clients can specify it; must be at least Q
+    namespace = "com.android.settingslib.widget.actionbarshadow"
+    compileSdk 34
+    defaultConfig {
+        minSdkVersion 31
+        targetSdkVersion 34
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard.flags'
+        }
+    }
+
+    sourceSets.main {
+        manifest.srcFile 'AndroidManifest.xml'
+        java.srcDirs = ['src']
+//        res.srcDirs = ['main/res']
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+//    implementation "androidx.annotation:annotation:1.0.0"
+    implementation libs.androidx.annotation.annotation
+    implementation libs.lifecycle.runtime
+    implementation libs.recyclerview
+}

SettingsLib/ActionBarShadow/src/com/android/settingslib/widget/ActionBarShadowController.java

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2019 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.widget;
+
+import static androidx.lifecycle.Lifecycle.Event.ON_START;
+import static androidx.lifecycle.Lifecycle.Event.ON_STOP;
+
+import android.app.ActionBar;
+import android.app.Activity;
+import android.view.View;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+
+/**
+ * UI controller that adds a shadow appear/disappear animation to action bar scroll.
+ */
+public class ActionBarShadowController implements LifecycleObserver {
+
+    @VisibleForTesting
+    static final float ELEVATION_HIGH = 8;
+    @VisibleForTesting
+    static final float ELEVATION_LOW = 0;
+
+    @VisibleForTesting
+    ScrollChangeWatcher mScrollChangeWatcher;
+    private View mScrollView;
+    private boolean mIsScrollWatcherAttached;
+
+    /**
+     * Wire up the animation to to an {@link Activity}. Shadow will be applied to activity's
+     * action bar.
+     */
+    public static ActionBarShadowController attachToView(
+            Activity activity, Lifecycle lifecycle, View scrollView) {
+        return new ActionBarShadowController(activity, lifecycle, scrollView);
+    }
+
+    /**
+     * Wire up the animation to to a {@link View}. Shadow will be applied to the view.
+     */
+    public static ActionBarShadowController attachToView(
+            View anchorView, Lifecycle lifecycle, View scrollView) {
+        return new ActionBarShadowController(anchorView, lifecycle, scrollView);
+    }
+
+    private ActionBarShadowController(Activity activity, Lifecycle lifecycle, View scrollView) {
+        mScrollChangeWatcher = new ActionBarShadowController.ScrollChangeWatcher(activity);
+        mScrollView = scrollView;
+        attachScrollWatcher();
+        lifecycle.addObserver(this);
+    }
+
+    private ActionBarShadowController(View anchorView, Lifecycle lifecycle, View scrollView) {
+        mScrollChangeWatcher = new ActionBarShadowController.ScrollChangeWatcher(anchorView);
+        mScrollView = scrollView;
+        attachScrollWatcher();
+        lifecycle.addObserver(this);
+    }
+
+    @OnLifecycleEvent(ON_START)
+    private void attachScrollWatcher() {
+        if (!mIsScrollWatcherAttached) {
+            mIsScrollWatcherAttached = true;
+            mScrollView.setOnScrollChangeListener(mScrollChangeWatcher);
+            mScrollChangeWatcher.updateDropShadow(mScrollView);
+        }
+    }
+
+    @OnLifecycleEvent(ON_STOP)
+    private void detachScrollWatcher() {
+        mScrollView.setOnScrollChangeListener(null);
+        mIsScrollWatcherAttached = false;
+    }
+
+    /**
+     * Update the drop shadow as the scrollable entity is scrolled.
+     */
+    final class ScrollChangeWatcher implements View.OnScrollChangeListener {
+
+        private final Activity mActivity;
+        private final View mAnchorView;
+
+        ScrollChangeWatcher(Activity activity) {
+            mActivity = activity;
+            mAnchorView = null;
+        }
+
+        ScrollChangeWatcher(View anchorView) {
+            mAnchorView = anchorView;
+            mActivity = null;
+        }
+
+        @Override
+        public void onScrollChange(View view, int scrollX, int scrollY, int oldScrollX,
+                int oldScrollY) {
+            updateDropShadow(view);
+        }
+
+        public void updateDropShadow(View view) {
+            final boolean shouldShowShadow = view.canScrollVertically(-1);
+            if (mAnchorView != null) {
+                mAnchorView.setElevation(shouldShowShadow ? ELEVATION_HIGH : ELEVATION_LOW);
+            } else if (mActivity != null) { // activity can become null when running monkey
+                final ActionBar actionBar = mActivity.getActionBar();
+                if (actionBar != null) {
+                    actionBar.setElevation(shouldShowShadow ? ELEVATION_HIGH : ELEVATION_LOW);
+                }
+            }
+        }
+    }
+}