Android 4.0 Launcher2可导入eclipse中直接运行

/* * 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.launcher2; import android.animation.Animator; import android.animation.Animator.AnimatorListener; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.animation.TimeInterpolator; import android.animation.ValueAnimator; import android.animation.ValueAnimator.AnimatorUpdateListener; import android.app.AlertDialog; import android.app.WallpaperManager; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProviderInfo; import android.content.ClipData; import android.content.ClipDescription; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Camera; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Point; import android.graphics.PorterDuff; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.Region.Op; import android.graphics.drawable.Drawable; import android.os.IBinder; import android.os.Parcelable; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.Log; import android.util.Pair; import android.view.Display; import android.view.DragEvent; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.DecelerateInterpolator; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.android.launcher.R; import com.android.launcher2.FolderIcon.FolderRingAnimator; import com.android.launcher2.InstallWidgetReceiver.WidgetMimeTypeHandlerData; import java.util.ArrayList; import java.util.HashSet; import java.util.List; /** * 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 SmoothPagedView implements DropTarget, DragSource, DragScroller, View.OnTouchListener, DragController.DragListener { @SuppressWarnings({"UnusedDeclaration"}) private static final String TAG = "Launcher.Workspace"; // Y rotation to apply to the workspace screens private static final float WORKSPACE_ROTATION = 12.5f; private static final float WORKSPACE_OVERSCROLL_ROTATION = 24f; private static float CAMERA_DISTANCE = 6500; private static final int CHILDREN_OUTLINE_FADE_OUT_DELAY = 0; private static final int CHILDREN_OUTLINE_FADE_OUT_DURATION = 375; private static final int CHILDREN_OUTLINE_FADE_IN_DURATION = 100; private static final int BACKGROUND_FADE_OUT_DURATION = 350; private static final int ADJACENT_SCREEN_DROP_DURATION = 300; // These animators are used to fade the children's outlines private ObjectAnimator mChildrenOutlineFadeInAnimation; private ObjectAnimator mChildrenOutlineFadeOutAnimation; private float mChildrenOutlineAlpha = 0; // These properties refer to the background protection gradient used for AllApps and Customize private ValueAnimator mBackgroundFadeInAnimation; private ValueAnimator mBackgroundFadeOutAnimation; private Drawable mBackground; boolean mDrawBackground = true; private float mBackgroundAlpha = 0; private float mOverScrollMaxBackgroundAlpha = 0.0f; private int mOverScrollPageIndex = -1; private AnimatorSet mDividerAnimator; private float mWallpaperScrollRatio = 1.0f; private final WallpaperManager mWallpaperManager; private IBinder mWindowToken; private static final float WALLPAPER_SCREENS_SPAN = 2f; private int mDefaultPage; /** * CellInfo for the cell that is currently being dragged */ private CellLayout.CellInfo mDragInfo; /** * Target drop area calculated during last acceptDrop call. */ private int[] mTargetCell = new int[2]; /** * The CellLayout that is currently being dragged over */ private CellLayout mDragTargetLayout = null; private Launcher mLauncher; private IconCache mIconCache; private 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 int[] mTempCell = new int[2]; private int[] mTempEstimate = new int[2]; private float[] mDragViewVisualCenter = new float[2]; private float[] mTempDragCoordinates = new float[2]; private float[] mTempCellLayoutCenterCoordinates = new float[2]; private float[] mTempDragBottomRightCoordinates = new float[2]; private Matrix mTempInverseMatrix = new Matrix(); private SpringLoadedDragController mSpringLoadedDragController; private float mSpringLoadedShrinkFactor; private static final int DEFAULT_CELL_COUNT_X = 4; private static final int DEFAULT_CELL_COUNT_Y = 4; // State variable that indicates whether the pages are small (ie when you're // in all apps or customize mode) enum State { NORMAL, SPRING_LOADED, SMALL }; private State mState = State.NORMAL; private boolean mIsSwitchingState = false; private boolean mSwitchStateAfterFirstLayout = false; private State mStateAfterFirstLayout; private AnimatorSet mAnimator; private AnimatorListener mChangeStateAnimationListener; boolean mAnimatingViewIntoPlace = false; boolean mIsDragOccuring = false; boolean mChildrenLayersEnabled = true; /** Is the user is dragging an item near the edge of a page? */ private boolean mInScrollArea = false; private final HolographicOutlineHelper mOutlineHelper = new HolographicOutlineHelper(); private Bitmap mDragOutline = null; private final Rect mTempRect = new Rect(); private final int[] mTempXY = new int[2]; private int mDragViewMultiplyColor; // Paint used to draw external drop outline private final Paint mExternalDragOutlinePaint = new Paint(); // Camera and Matrix used to determine the final position of a neighboring CellLayout private final Matrix mMatrix = new Matrix(); private final Camera mCamera = new Camera(); private final float mTempFloat2[] = new float[2]; enum WallpaperVerticalOffset { TOP, MIDDLE, BOTTOM }; int mWallpaperWidth; int mWallpaperHeight; WallpaperOffsetInterpolator mWallpaperOffset; boolean mUpdateWallpaperOffsetImmediately = false; private Runnable mDelayedResizeRunnable; private int mDisplayWidth; private int mDisplayHeight; private boolean mIsStaticWallpaper; private int mWallpaperTravelWidth; // Variables relating to the creation of user folders by hovering shortcuts over shortcuts private static final int FOLDER_CREATION_TIMEOUT = 250; private final Alarm mFolderCreationAlarm = new Alarm(); private FolderRingAnimator mDragFolderRingAnimator = null; private View mLastDragOverView = null; private boolean mCreateUserFolderOnDrop = false; // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget) private float mX