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在10.0的系统rom定制化开发中,在对于launcher3的一些开发定制中,在对hotseat的一些开发中,需要实现动态hotseat居中
的功能,就是在拖拽图标进入和拖出hotseat,都可以保持hotseat居中的功能,接下来分析下相关功能实现
具体如图:
packages\apps\Launcher3\src\com\android\launcher3\Hotseat.java
Launcher顾名思义,就是桌面的意思,也是android系统启动后第一个启动的应用程序,
:Launcher3负责管理和展示用户手机桌面上的各个应用程序图标。它通过GridView或者LinearLayout等布局管理器将
图标进行排列,并支持滑动、放大缩小等手势操作
Hotseat也是属于在导航栏底部的BubbleTextView的布局,只是不显示app图标
在实现Launcher3拖拽图标进入hotseat自适应布局功能实现一的核心功能中,通过上述的分析得知,
首选需要给Hotseat添加背景功能,然后需要根据hotseat的数量多少来设置hotseat的宽度高度等
相关参数,这样就实现了第一步的hotseat的居中显示功能,
- public class Hotseat extends CellLayout implements LogContainerProvider, Insettable, Transposable {
-
- @ViewDebug.ExportedProperty(category = "launcher")
- public boolean mHasVerticalHotseat;
- private final HotseatController mController;
-
- public Hotseat(Context context) {
- this(context, null);
- }
-
- public Hotseat(Context context, AttributeSet attrs) {
- this(context, attrs, 0);
- }
-
- public Hotseat(Context context, AttributeSet attrs, int defStyle) {
- super(context, attrs, defStyle);
- mController = LauncherAppMonitor.getInstance(context).getHotseatController();
-
- }
-
- public HotseatController getController() {
- return mController;
- }
-
- /* Get the orientation specific coordinates given an invariant order in the hotseat. */
- public int getCellXFromOrder(int rank) {
- return mHasVerticalHotseat ? 0 : rank;
- }
-
- public int getCellYFromOrder(int rank) {
- return mHasVerticalHotseat ? (getCountY() - (rank + 1)) : 0;
- }
-
- public void resetLayout(boolean hasVerticalHotseat) {
- removeAllViewsInLayout();
- mHasVerticalHotseat = hasVerticalHotseat;
- InvariantDeviceProfile idp = mActivity.getDeviceProfile().inv;
- if (hasVerticalHotseat) {
- setGridSize(1, idp.numHotseatIcons);
- } else {
- setGridSize(idp.numHotseatIcons, 1);
- }
- //add core start
- // 添加背景
- if(idp.numHotseatIcons>0){
- setBackgroundResource(R.drawable.shape_corner);
- }
- //add core end
- }
-
- @Override
- public void fillInLogContainerData(View v, ItemInfo info, Target target, Target targetParent) {
- target.gridX = info.cellX;
- target.gridY = info.cellY;
- targetParent.containerType = LauncherLogProto.ContainerType.HOTSEAT;
- }
-
- @Override
- public void setInsets(Rect insets) {
- FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
- DeviceProfile grid = mActivity.getWallpaperDeviceProfile();
- insets = grid.getInsets();
-
- if (grid.isVerticalBarLayout()) {
- lp.height = ViewGroup.LayoutParams.WRAP_CONTENT;
- if (grid.isSeascape()) {
- lp.gravity = Gravity.LEFT;
- lp.width = grid.hotseatBarSizePx + insets.left;
- } else {
- lp.gravity = Gravity.RIGHT;
- lp.width = grid.hotseatBarSizePx + insets.right;
- }
- } else {
- lp.gravity = Gravity.BOTTOM;
- lp.width = ViewGroup.LayoutParams.MATCH_PARENT;
- lp.height = grid.hotseatBarSizePx + insets.bottom;
- }
- Rect padding = grid.getHotseatLayoutPadding();
- setPadding(padding.left, padding.top, padding.right, padding.bottom);
-
- setLayoutParams(lp);
- InsettableFrameLayout.dispatchInsets(this, insets);
- }
-
- @Override
- public boolean onTouchEvent(MotionEvent event) {
- // Don't let if follow through to workspace
- return true;
- }
- @Override
- public RotationMode getRotationMode() {
- return Launcher.getLauncher(getContext()).getRotationMode();
- }
- }

在实现Launcher3拖拽图标进入hotseat自适应布局功能实现一的核心功能中,通过上述的分析得知,
在Hotseat中相关源码分析,可以发现由
resetLayout 就是负责布局的 当hotseat 增加减少时都会重新布局
所以在setBackgroundResource(R.drawable.shape_corner);添加背景就可以了
- public void resetLayout(boolean hasVerticalHotseat) {
- removeAllViewsInLayout();
- mHasVerticalHotseat = hasVerticalHotseat;
- InvariantDeviceProfile idp = mActivity.getDeviceProfile().inv;
- if (hasVerticalHotseat) {
- setGridSize(1, idp.numHotseatIcons);
- } else {
- setGridSize(idp.numHotseatIcons, 1);
- }
- // 添加背景
- if(idp.numHotseatIcons>0){
- setBackgroundResource(R.drawable.shape_corner);
- }
- }
-
- shape_corner.xml
-
- <?xml version="1.0" encoding="utf-8"?>
- <shape xmlns:android="http://schemas.android.com/apk/res/android">
- <!--背景颜色-->
- <solid android:color="#FFFAFA" />
- <!--角的半径-->
- <corners android:radius="10dp"/>
- <!--边框颜色-->
- <stroke android:width="1dp" android:color="#00000000" />
- </shape>
-
-
- public void setInsets(Rect insets) {
- FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
- DeviceProfile grid = mActivity.getWallpaperDeviceProfile();
- insets = grid.getInsets();
- //竖屏布局
- if (grid.isVerticalBarLayout()) {
- lp.height = ViewGroup.LayoutParams.WRAP_CONTENT;
- if (grid.isSeascape()) {
- lp.gravity = Gravity.LEFT;
- lp.width = grid.hotseatBarSizePx + insets.left;
- } else {
- lp.gravity = Gravity.RIGHT;
- lp.width = grid.hotseatBarSizePx + insets.right;
- }
- } else {
- //modify core start
- // 横屏布局
- // 平板开发项目 固定横屏,所以要在这里设置参数
- // 设置宽高 左边底部的间距
- InvariantDeviceProfile idp = mActivity.getDeviceProfile().inv;
- int hotseatNums = idp.numHotseatIcons;
- lp.width = hotseatNums*grid.hotseatBarSizePx+(hotseatNums+1)*dip2px(15.0f);
- lp.height = grid.hotseatBarSizePx + insets.bottom;
- if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT){
- lp.leftMargin = (int)((1080-lp.width)/2);
- }else{
- lp.leftMargin = (int)((1920-lp.width)/2);
- }
- lp.gravity = Gravity.BOTTOM;
- //modify core end
- }
- Rect padding = grid.getHotseatLayoutPadding();
- // 设置padding 布局
- setPadding(0, padding.top, 0,0);
-
- setLayoutParams(lp);
- InsettableFrameLayout.dispatchInsets(this, insets);
- }

在实现Launcher3拖拽图标进入hotseat自适应布局功能实现一的核心功能中,通过上述的分析得知,
在Hotseat中相关源码分析,
而setInset() 负责设置绘制布局 的参数 这里设置hotseat的宽高等参数布局
其实只需要修改lp的参数就行了 然后hotseat 会根据长宽等参数 来具体布局每一个hotseat的具体坐标
根据横竖屏来确定lp.leftMargin的值,就可以保证居中显示
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