Android 9.0版本修改Launcher图标默认为圆形

[DESCRIPTION]

客户要求修改Launcher所有图标默认为圆形图标

[SOLUTION]

设置中打开开发者选项后，我们可以发现长按主界面空白处会弹出三个选项，选择Home settings(主屏幕设置)，里面有项更改图标形状，可以看到有几种图标形状选择，我们根据需求默认为圆形。

Path:packages\apps\Launcher3\src\com\android\launcher3\graphics\IconShapeOverride.java

注：这里我使用的是packages下面的Launcher3，正常是适用vender下面的。

CODE：
--- a/alps/packages/apps/Launcher3/src/com/android/launcher3/graphics/IconShapeOverride.java
+++ b/alps/packages/apps/Launcher3/src/com/android/launcher3/graphics/IconShapeOverride.java
@@ -57,8 +57,17 @@ public class IconShapeOverride {
     private static final long PROCESS_KILL_DELAY_MS = 1000;
 
     private static final int RESTART_REQUEST_CODE = 42; // the answer to everything
+       
+       public static final String DEFAULT_ICON_SHAPE_CIRCLE = "M50 0A50 50,0,1,1,50 100A50 50,0,1,1,50 0"; // add Monkey.20191118 icon circle
 
     public static boolean isSupported(Context context) {
+               
+               // add Monkey.20191118 icon circle
+            //Default display <Change icon shape>
+        if (context != null) {
+            return true;   
+        }
+               // end
+               
         if (!Utilities.ATLEAST_OREO) {
             return false;
         }
@@ -116,7 +125,9 @@ public class IconShapeOverride {
     }
 
     private static String getAppliedValue(Context context) {
-        return getDevicePrefs(context).getString(KEY_PREFERENCE, "");
+               // Monkey.20191118 icon circle
+            //It defaults to a circle
+        // return getDevicePrefs(context).getString(KEY_PREFERENCE, "");
+               return getDevicePrefs(context).getString(KEY_PREFERENCE, DEFAULT_ICON_SHAPE_CIRCLE);
     }
 
     public static void handlePreferenceUi(ListPreference preference) {

注：M50 0A50 50,0,1,1,50 100A50 50,0,1,1,50 0：为代表图标为圆形的代码
Path：packages/apps/Launcher3/res/values/config.xml文件中有该数组图形代码

<!-- Values for icon shape overrides. These should correspond to entries defined
     in icon_shape_override_paths_names -->
    <string-array translatable="false" name="icon_shape_override_paths_values">
        <item></item>
        <item>M50,0L100,0 100,100 0,100 0,0z</item>
        <item>M50,0 C10,0 0,10 0,50 0,90 10,100 50,100 90,100 100,90 100,50 100,10 90,0 50,0 Z</item>
        <item>M50 0A50 50,0,1,1,50 100A50 50,0,1,1,50 0</item>
        <item>M50,0A50,50,0,0 1 100,50 L100,85 A15,15,0,0 1 85,100 L50,100 A50,50,0,0 1 50,0z</item>
    </string-array>

    <string-array translatable="false" name="icon_shape_override_paths_names">
        <!-- Option to not change the icon shape on home screen. [CHAR LIMIT=50] -->
        <item>@string/icon_shape_system_default</item>
        <item>@string/icon_shape_square</item>
        <item>@string/icon_shape_squircle</item>
        <item>@string/icon_shape_circle</item>
        <item>@string/icon_shape_teardrop</item>
    </string-array>