快应用标准框架实现，支持快应用的加载、运行、渲染，提供必要API的支持.zip

/* * Copyright (C) 2011 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 org.hapjs.widgets.view.swiper; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.Resources; import android.content.res.TypedArray; import android.database.DataSetObserver; import android.graphics.Canvas; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; import android.os.SystemClock; import android.util.AttributeSet; import android.util.Log; import android.view.Choreographer; import android.view.FocusFinder; import android.view.Gravity; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.SoundEffectConstants; import android.view.VelocityTracker; import android.view.View; import android.view.ViewConfiguration; import android.view.ViewGroup; import android.view.ViewParent; import android.view.accessibility.AccessibilityEvent; import android.view.animation.Interpolator; import androidx.annotation.CallSuper; import androidx.annotation.DrawableRes; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.core.content.ContextCompat; import androidx.core.os.ParcelableCompat; import androidx.core.os.ParcelableCompatCreatorCallbacks; import androidx.core.view.AccessibilityDelegateCompat; import androidx.core.view.MotionEventCompat; import androidx.core.view.VelocityTrackerCompat; import androidx.core.view.ViewCompat; import androidx.core.view.WindowInsetsCompat; import androidx.core.view.accessibility.AccessibilityEventCompat; import androidx.core.view.accessibility.AccessibilityNodeInfoCompat; import androidx.core.view.accessibility.AccessibilityRecordCompat; import androidx.core.widget.EdgeEffectCompat; import androidx.customview.view.AbsSavedState; import androidx.fragment.app.FragmentPagerAdapter; import androidx.fragment.app.FragmentStatePagerAdapter; import androidx.viewpager.widget.PagerTitleStrip; import java.lang.annotation.ElementType; import java.lang.annotation.Inherited; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import org.hapjs.common.compat.BuildPlatform; /** * Layout manager that allows the user to flip left and right through pages of data. You supply an * implementation of a {@link PagerAdapter} to generate the pages that the view shows. * * <p> * * <p>ViewPager is most often used in conjunction with {@link android.app.Fragment}, which is a * convenient way to supply and manage the lifecycle of each page. There are standard adapters * implemented for using fragments with the ViewPager, which cover the most common use cases. These * are {@link FragmentPagerAdapter} and {@link FragmentStatePagerAdapter}; each of these classes * have simple code showing how to build a full user interface with them. * * <p> * * <p>Views which are annotated with the {@link DecorView} annotation are treated as part of the * view pagers 'decor'. Each decor view's position can be controlled via its {@code * android:layout_gravity} attribute. For example: * * <p> * * <pre> * &lt;android.support.v4.view.ViewPager * android:layout_width=&quot;match_parent&quot; * android:layout_height=&quot;match_parent&quot;&gt; * * &lt;android.support.v4.view.PagerTitleStrip * android:layout_width=&quot;match_parent&quot; * android:layout_height=&quot;wrap_content&quot; * android:layout_gravity=&quot;top&quot; /&gt; * * &lt;/android.support.v4.view.ViewPager&gt; * </pre> * * <p> * * <p>For more information about how to use ViewPager, read <a * href="{@docRoot}training/implementing-navigation/lateral.html">Creating Swipe Views with * Tabs</a>. * * <p> * * <p>You can find examples of using ViewPager in the API 4+ Support Demos and API 13+ Support Demos * sample code. */ public class ViewPager extends ViewGroup { /** * Indicates that the pager is in an idle, settled state. The current page is fully in view and no * animation is in progress. */ public static final int SCROLL_STATE_IDLE = 0; /** * Indicates that the pager is currently being dragged by the user. */ public static final int SCROLL_STATE_DRAGGING = 1; /** * Indicates that the pager is in the process of settling to a final position. */ public static final int SCROLL_STATE_SETTLING = 2; static final int[] LAYOUT_ATTRS = new int[] {android.R.attr.layout_gravity}; private static final String TAG = "ViewPager"; private static final boolean DEBUG = false; private static final boolean USE_CACHE = false; private static final int DEFAULT_OFFSCREEN_PAGES = 1; private static final int MAX_SETTLE_DURATION = 600; // ms private static final int MIN_DISTANCE_FOR_FLING = 25; // dips private static final int DEFAULT_GUTTER_SIZE = 16; // dips private static final int MIN_FLING_VELOCITY = 400; // dips private static final Comparator<ItemInfo> COMPARATOR = new Comparator<ItemInfo>() { @Override public int compare(ItemInfo lhs, ItemInfo rhs) { return lhs.position - rhs.position; } }; private static final Interpolator sInterpolator = new Interpolator() { @Override public float getInterpolation(float t) { t -= 1.0f; return t * t * t * t * t + 1.0f; } }; /** * Sentinel value for no current active pointer. Used by {@link #mActivePointerId}. */ private static final int INVALID_POINTER = -1; // If the pager is at least this close to its final position, complete the scroll // on touch down and let the user interact with the content inside instead of // "catching" the flinging pager. private static final int CLOSE_ENOUGH = 2; // dp private static final int DRAW_ORDER_DEFAULT = 0; private static final int DRAW_ORDER_FORWARD = 1; private static final int DRAW_ORDER_REVERSE = 2; private static final ViewPositionComparator sPositionComparator = new ViewPositionComparator(); private final ArrayList<ItemInfo> mItems = new ArrayList<ItemInfo>(); private final ItemInfo mTempItem = new ItemInfo(); private final Rect mTempRect = new Rect(); PagerAdapter mAdapter; int mCurItem; // Index of currently displayed page. /** * Used to track what the expected number of items in the adapter should be. If the app changes * this when we don't expect it, we'll throw a big obnoxious exception. */ private int mExpectedAdapterCount; private VerticalViewPagerCompat compat; private Choreographer.FrameCallback mDispatchCallback; private int mRestoredCurItem = -1; private Parcelable mRestoredAdapterState = null; private ClassLoader mRestoredClassLoader = null; private CustomScroller mScroller; private boolean mIsScrollStarted; private PagerObserver mObserver; private int mPageMargin; private Drawable mMarginDrawable; private int mTopPageBounds; private int mBottomPageBounds; private int mL