Android仿google系统桌面自定义桌面

/* * Copyright (C) 2008 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.launcher3; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.LayoutTransition; import android.animation.ObjectAnimator; import android.animation.PropertyValuesHolder; import android.annotation.SuppressLint; import android.content.ComponentName; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Point; import android.graphics.PointF; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.os.IBinder; import android.os.Parcelable; import android.text.TextUtils; import android.util.AttributeSet; import android.util.Log; import android.util.Property; import android.util.SparseArray; import android.view.MotionEvent; import android.view.View; import android.view.ViewDebug; import android.view.ViewGroup; import android.view.animation.DecelerateInterpolator; import android.view.animation.Interpolator; import android.widget.TextView; import com.android.launcher3.config.FeatureFlags; import com.android.launcher3.config.ProviderConfig; import com.android.launcher3.dragndrop.DragController; import com.android.launcher3.dragndrop.DragLayer; import com.android.launcher3.dragndrop.DragOptions; import com.android.launcher3.dragndrop.DragScroller; import com.android.launcher3.dragndrop.DragView; import com.android.launcher3.dragndrop.SpringLoadedDragController; import com.android.launcher3.folder.Folder; import com.android.launcher3.folder.FolderIcon; import com.android.launcher3.graphics.DragPreviewProvider; import com.android.launcher3.nano.LauncherLogProto; import com.android.launcher3.nano.LauncherLogProto.Target; import com.android.launcher3.util.LongArrayMap; import com.android.launcher3.util.Thunk; import com.android.launcher3.util.VerticalFlingDetector; import com.example.customerlauncher3.DeviceDJMainActivity; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import com.example.customerlauncher3.R; /** * The workspace is a wide area with a wallpaper and a finite number of pages. * Each page contains a number of icons, folders or widgets the user can * interact with. A workspace is meant to be used with a fixed width only. */ public class Workspace extends PagedView implements DropTarget, DragSource, DragScroller, View.OnTouchListener, DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener, Insettable { private static final String TAG = "Launcher.Workspace"; private static boolean ENFORCE_DRAG_EVENT_ORDER = false; private static final int SNAP_OFF_EMPTY_SCREEN_DURATION = 400; private static final int FADE_EMPTY_SCREEN_DURATION = 150; private static final int ADJACENT_SCREEN_DROP_DURATION = 300; private static final boolean MAP_NO_RECURSE = false; private static final boolean MAP_RECURSE = true; // The screen id used for the empty screen always present to the right. public static final long EXTRA_EMPTY_SCREEN_ID = -201; // The is the first screen. It is always present, even if its empty. public static final long FIRST_SCREEN_ID = 0; private final static long CUSTOM_CONTENT_SCREEN_ID = -301; private static final long CUSTOM_CONTENT_GESTURE_DELAY = 200; private long mTouchDownTime = -1; private long mCustomContentShowTime = -1; private LayoutTransition mLayoutTransition; private ShortcutAndWidgetContainer mDragSourceInternal; @Thunk LongArrayMap<CellLayout> mWorkspaceScreens = new LongArrayMap<>(); @Thunk ArrayList<Long> mScreenOrder = new ArrayList<Long>(); @Thunk Runnable mRemoveEmptyScreenRunnable; @Thunk boolean mDeferRemoveExtraEmptyScreen = false; /** * CellInfo for the cell that is currently being dragged */ private CellLayout.CellInfo mDragInfo; /** * Target drop area calculated during last acceptDrop call. */ @Thunk int[] mTargetCell = new int[2]; private int mDragOverX = -1; private int mDragOverY = -1; boolean mCustomContentShowing; private float mLastCustomContentScrollProgress = -1f; private String mCustomContentDescription = ""; /** * The CellLayout that is currently being dragged over */ @Thunk CellLayout mDragTargetLayout = null; /** * The CellLayout that we will show as highlighted */ private CellLayout mDragOverlappingLayout = null; /** * The CellLayout which will be dropped to */ private CellLayout mDropToLayout = null; @Thunk DeviceDJMainActivity mDeviceDJMainActivity; @Thunk DragController mDragController; // These are temporary variables to prevent having to allocate a new object just to // return an (x, y) value from helper functions. Do NOT use them to maintain other state. private static final Rect sTempRect = new Rect(); private final int[] mTempXY = new int[2]; @Thunk float[] mDragViewVisualCenter = new float[2]; private float[] mTempCellLayoutCenterCoordinates = new float[2]; private int[] mTempVisiblePagesRange = new int[2]; private Matrix mTempMatrix = new Matrix(); private SpringLoadedDragController mSpringLoadedDragController; private float mOverviewModeShrinkFactor; // State variable that indicates whether the pages are small (ie when you're // in all apps or customize mode) public enum State { NORMAL(false, false), NORMAL_HIDDEN(false, false), SPRING_LOADED(false, true), OVERVIEW(true, true), OVERVIEW_HIDDEN(true, false); public final boolean shouldUpdateWidget; public final boolean hasMultipleVisiblePages; State(boolean shouldUpdateWidget, boolean hasMultipleVisiblePages) { this.shouldUpdateWidget = shouldUpdateWidget; this.hasMultipleVisiblePages = hasMultipleVisiblePages; } } // Direction used for moving the workspace and launcher_hotseat UI public enum Direction { X(TRANSLATION_X), Y(TRANSLATION_Y); private final Property<View, Float> viewProperty; Direction(Property<View, Float> viewProperty) { this.viewProperty = viewProperty; } } /** * These values correspond to {@link Direction#X} & {@link Direction#Y} */ private float[] mPageAlpha = new float[]{1, 1}; private float[] mHotseatAlpha = new float[]{1, 1, 1}; @ViewDebug.ExportedProperty(category = "launcher") private State mState = State.NORMAL; private boolean mIsSwitchingState = false; boolean mAnimatingViewIntoPlace = false; boolean mChildrenLayersEnabled = true; private boolean mStripScreensOnPageStopMoving = false; /** * Is the user is dragging an item near the edge of a page? */ private boolean mInScrollArea = false; private DragPreviewProvider mOutlineProvider = null; public static final int DRAG_BITMAP_PADDING = DragPreviewProvider.DRAG_BITMAP_PADDING; private boolean mWorkspaceFadeInAdjacentScreens; private boolean mUnlockWallpaperFromDefaultPageOnLayout; @Thunk Runnable mDelayedResizeRunnable; private Runnable mDelayedSnapToPageRunnable; //