1.调整Home screen上Hotseat, Google folder , Play store.
在开发过程中，如果要求更改Hotseat和Google folder中的某些APP, 或者这些APP在home screen中的位置，则可以在vendor/partner_gms/apps/GmsSampleIntegration/res_dhs_full/xml/partner_default_layout.xml文件中修改.
<favorites><!-- Hotseat (We use the screen as the position of the item in the hotseat) --><!-- Dialer Messaging Calendar Contacts Camera --><favorite container="-101" screen="0" x="0" y="0" packageName="com.google.android.gm" className="com.google.android.gm.ConversationListActivityGmail"/>......<!-- <favorite container="-101" screen="4" x="4" y="0" packageName="org.codeaurora.snapcam" className="com.android.camera.CameraLauncher"/> --><!-- In Launcher3, workspaces extend infinitely to the right, incrementing from zero --><!-- Google folder --><!-- Google, Chrome, Gmail, Maps, YouTube, (Drive), (Music), (Movies), Duo, Photos --><folder title="@string/google_folder_title" screen="0" x="0" y="3"><favorite packageName="com.google.android.googlequicksearchbox" className="com.google.android.googlequicksearchbox.SearchActivity"/>......<favorite packageName="com.google.android.apps.photos" className="com.google.android.apps.photos.home.HomeActivity"/></folder><favorite screen="0" x="3" y="3" packageName="com.android.vending" className="com.android.vending.AssetBrowserActivity"/>
</favorites>Container="-101": 代表属于Hotseat
X=3, y=3 : 意思是home screen上为4x4, 位置右下角, x=0,y=0在左上角.在Bobcat上x=0,y=0会不可见，ｘ=0这一行被date widget挡住.
2.横屏情况不显示Icon name
XXX设备上竖屏转到横屏的情况，会出现home screen上除Hotseat以外的Icon是不显示icon name的，这个时候需要修改packages/apps/Launcher3/src/com/android/launcher3/DeviceProfile.java文件中的updateIconSize方法
private void updateIconSize(float scale, Resources res, DisplayMetrics dm) {// Workspacefinal boolean isVerticalLayout = isVerticalBarLayout();......// All appsallAppsIconTextSizePx = iconTextSizePx;…...if (isVerticalLayout) {// 如果为横屏则执行隐藏// Always hide the Workspace text with vertical bar layout.AdjustToHideWorkspaceLabels(); //该方法为隐藏icon name }// Hotseatif (isVerticalLayout) {hotseatBarSizePx = iconSizePx + hotseatBarSidePaddingStartPx+ hotseatBarSidePaddingEndPx;}hotseatCellHeightPx = iconSizePx;.......// Folder iconfolderIconSizePx = IconNormalizer.getNormalizedCircleSize(iconSizePx);folderIconOffsetYPx = (iconSizePx - folderIconSizePx) / 2;}3.调整Hotseat到屏幕底部或者右侧
如果想强制调整Hotseat区域到屏幕底部，右侧或者左侧，可以修改packages/apps/Launcher3/src/com/android/launcher3/Hotseat.java
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.MATCH_PARENT;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;//lp.bottomMargin 可以调整这个值增大hotseat 区域与边框的距离，需要把下面setpadding注释掉}Rect padding = grid.getHotseatLayoutPadding();setPadding(padding.left, padding.top, padding.right, padding.bottom);setLayoutParams(lp);InsettableFrameLayout.dispatchInsets(this, insets);}4.强制设定home screen横竖屏一样布局
修改packages/apps/Launcher3/res/values/config.xml文件中hotseat_transpose_layout_with_orientation的值为false.
5.取消橫屏下右側滾動條旁邊空白區域
修改packages/apps/Launcher3/src/com/android/launcher3/allapps/AllAppsContainerView.java文件中setInsets方法:
public void setInsets(Rect insets) {DeviceProfile grid = mLauncher.getDeviceProfile();int leftRightPadding = grid.desiredWorkspaceLeftRightMarginPx+ grid.cellLayoutPaddingLeftRightPx;for (int i = 0; i < mAH.length; i++) {mAH[i].adapter.setAppsPerRow(grid.inv.numAllAppsColumns);mAH[i].padding.bottom = insets.bottom;mAH[i].padding.left = mAH[i].padding.right = leftRightPadding;mAH[i].applyPadding();}ViewGroup.MarginLayoutParams mlp = (MarginLayoutParams) getLayoutParams();if (grid.isVerticalBarLayout()) {mlp.leftMargin = insets.left;mlp.rightMargin = insets.right;Log.i("WKS1","AllAppsContainerView -> setInsets ");
// setPadding(grid.workspacePadding.left, 0, grid.workspacePadding.right, 0);//設定距離左右兩邊的距離setPadding(grid.verticalDragHandleSizePx, 0, grid.verticalDragHandleSizePx, 0);or setPadding(grid.cellLayoutPaddingLeftRightPx, 0, grid.cellLayoutPaddingLeftRightPx, 0);} else {mlp.leftMargin = mlp.rightMargin = 0;setPadding(0, 0, 0, 0);}setLayoutParams(mlp);InsettableFrameLayout.dispatchInsets(this, insets);mLauncher.getAllAppsController().setScrollRangeDelta(mSearchUiManager.getScrollRangeDelta(insets));}6.NON-GMS 修改Desktop上的search bar
6.1 Search bar的输入框中有google字体提示，desktop上的search bar的布局文件为”packages/apps/QuickSearchBox/res/layout/search_widget.xml”, 出现google提示是因为search_widget_text这个textview使用了”android:background="@drawable/textfield_search_empty_google"”属性，解决办法注释res/drawable/textfield_search_empty_google.xml文件中的src属性：
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@drawable/textfield_search_empty" /><!-- 注释下面内容 --><item><bitmap android:src="@drawable/hint_google" android:gravity="left|center_vertical" /></item> </layer-list>6.2开机后search bar上会有voice按钮，显示几秒后自动消失.
解决办法修改res/layout/search_widget.xml文件中的voice ImageButton。
<ImageButtonandroid:id="@+id/search_widget_voice_btn"android:layout_width="wrap_content"android:layout_height="match_parent"android:background="@drawable/btn_search_dialog_voice"android:src="@drawable/ic_btn_speak_now"android:layout_marginRight="-4dip"android:visibility="gone"/>6.3点击search bar后，出现的输入框右边会有voice 按钮
解决办法修改res/layout/search_activity.xml文件中的voice ImageButton
<ImageButtonandroid:id="@+id/search_voice_btn"android:layout_width="wrap_content"android:layout_height="match_parent"android:background="@drawable/btn_search_dialog_voice"android:src="@drawable/ic_btn_speak_now"android:layout_marginRight="-4dip"android:visibility="gone"/>
)
