Android13 Launcher3如何禁用Hotseat应用功能

Android13 Launcher3 禁用Hotseat应用功能只需要修改两部分代码

(前提是没有配置谷歌的GMS包)

• Launcher3/res/xml/device_profiles.xml
• Launcher3/src/com/android/launcher3/DeviceProfile.java

Launcher3/res/xml/device_profiles.xml修改桌面布局

--- a/res/xml/device_profiles.xml
+++ b/res/xml/device_profiles.xml
@@ -23,7 +23,7 @@
         launcher:numColumns="3"
         launcher:numFolderRows="2"
         launcher:numFolderColumns="3"
-        launcher:numHotseatIcons="3"
+        launcher:numHotseatIcons="0"
         launcher:dbFile="launcher_3_by_3.db"
         launcher:defaultLayoutId="@xml/default_workspace_3x3"
         launcher:deviceCategory="phone|multi_display" >
@@ -56,7 +56,7 @@
         launcher:numColumns="4"
         launcher:numFolderRows="3"
         launcher:numFolderColumns="4"
-        launcher:numHotseatIcons="4"
+        launcher:numHotseatIcons="0"
         launcher:dbFile="launcher_4_by_4.db"
         launcher:defaultLayoutId="@xml/default_workspace_4x4"
         launcher:deviceCategory="phone|multi_display" >
@@ -119,7 +119,7 @@
         launcher:numColumns="5"
         launcher:numFolderRows="4"
         launcher:numFolderColumns="4"
-        launcher:numHotseatIcons="5"
+        launcher:numHotseatIcons="0"
         launcher:dbFile="launcher.db"
         launcher:defaultLayoutId="@xml/default_workspace_5x5"
         launcher:deviceCategory="phone|multi_display" >
@@ -163,7 +163,7 @@
         launcher:numSearchContainerColumns="3"
         launcher:numFolderRows="3"
         launcher:numFolderColumns="3"
-        launcher:numHotseatIcons="6"
+        launcher:numHotseatIcons="0"
         launcher:hotseatColumnSpanLandscape="4"
         launcher:numAllAppsColumns="6"
         launcher:isScalable="true"

将所有的numHotseatIcons修改为0，无论是哪个布局上所有的hotseats将为0不会显示。防止设置里面 更改显示大小 适配布局显示出来。

Launcher3/src/com/android/launcher3/DeviceProfile.java 防止除数除以0

--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -776,16 +776,19 @@ public class DeviceProfile {
      * This method calculates the space between the icons to achieve that width.
      */
     private int calculateHotseatBorderSpace() {
-        if (!isScalableGrid) return 0;
-        //TODO(http://b/228998082) remove this when 3 button spaces are fixed
-        if (areNavButtonsInline) {
-            return pxFromDp(inv.hotseatBorderSpaces[mTypeIndex], mMetrics);
-        } else {
-            int columns = inv.hotseatColumnSpan[mTypeIndex];
-            float hotseatWidthPx = getIconToIconWidthForColumns(columns);
-            float hotseatIconsTotalPx = iconSizePx * numShownHotseatIcons;
-            return (int) (hotseatWidthPx - hotseatIconsTotalPx) / (numShownHotseatIcons - 1);
-        }
+        // if (!isScalableGrid) return 0;
+        // //TODO(http://b/228998082) remove this when 3 button spaces are fixed
+        // if (areNavButtonsInline) {
+        //     return pxFromDp(inv.hotseatBorderSpaces[mTypeIndex], mMetrics);
+        // } else {
+        //     int columns = inv.hotseatColumnSpan[mTypeIndex];
+        //     float hotseatWidthPx = getIconToIconWidthForColumns(columns);
+        //     float hotseatIconsTotalPx = iconSizePx * numShownHotseatIcons;
+        //     return (int) (hotseatWidthPx - hotseatIconsTotalPx) / (numShownHotseatIcons - 1);
+        // }
+        return iconSizePx;
     }
 
 
@@ -1117,7 +1120,10 @@ public class DeviceProfile {
             // for this, we pad the left and right of the hotseat with half of the difference of a
             // workspace cell vs a hotseat cell.
             float workspaceCellWidth = (float) widthPx / inv.numColumns;
-            float hotseatCellWidth = (float) widthPx / numShownHotseatIcons;
+            // float hotseatCellWidth = (float) widthPx / numShownHotseatIcons;
+            float hotseatCellWidth = (float) widthPx / numShownHotseatIcons== 0 ? 3 : numShownHotseatIcons;
             int hotseatAdjustment = Math.round((workspaceCellWidth - hotseatCellWidth) / 2);
             mHotseatPadding.set(hotseatAdjustment + workspacePadding.left + cellLayoutPaddingPx.left
                             + mInsets.left, hotseatBarTopPaddingPx,
@@ -1207,13 +1213,25 @@ public class DeviceProfile {
         }
     }
 
     public static int calculateCellWidth(int width, int borderSpacing, int countX) {
-        return (width - ((countX - 1) * borderSpacing)) / countX;
+        // return (width - ((countX - 1) * borderSpacing)) / countX;
+        if(countX > 1){
+            return (width - ((countX - 1) * borderSpacing)) / countX;
+        }else{
+            return (width - borderSpacing) / 2;
+        }
     }
 
     public static int calculateCellHeight(int height, int borderSpacing, int countY) {
-        return (height - ((countY - 1) * borderSpacing)) / countY;
+        //return (height - ((countY - 1) * borderSpacing)) / countY;
+        if (countY > 1){
+            return (height - ((countY - 1) * borderSpacing)) / countY;
+        }else{
+            return (height - (borderSpacing)) / 2;
+        }
     }

因为在源码中有多处地方在计算布局的时候，都会获取numHotseatIcons的值来做计算，包括除法运算，所以numHotseatIcons的值设为0或者1之后，会引发 java.lang.ArithmeticException: divide by zero等报错。

最后展示结果如下：