Changes required to use MaskableIconDrawable inside Launcher3

This CL will bake the legacy icons inside a grey background

Note: There will be follow up CL to change the color and shadow of the
legacy icon. The idea of this CL is to first test if MaskableIconDrawable
methods and class work properly.

Bug: 32063838
Bug: 33553066

Change-Id: I3d02e619fcb0cd9879baa22a025b5d95c829f26c

res/values/colors.xml

@@ -52,4 +52,5 @@
     <color name="fallback_secondary_color">#FF37474F</color>
 
     <color name="notification_icon_default_color">#757575</color> <!-- Gray 600 -->
+    <color name="legacy_icon_background">#FFE0E0E0</color>
 </resources>

src/com/android/launcher3/graphics/LauncherIcons.java

@@ -29,10 +29,13 @@ import android.graphics.PaintFlagsDrawFilter;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.PaintDrawable;
+import android.graphics.drawable.ScaleDrawable;
 import android.os.Process;
 import android.os.UserHandle;
+import android.view.Gravity;
 
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.IconCache;
@@ -45,12 +48,12 @@ import com.android.launcher3.model.PackageItemInfo;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.ShortcutInfoCompat;
 
-import java.lang.reflect.Method;
-
 /**
  * Helper methods for generating various launcher icons
  */
 public class LauncherIcons {
+    // TODO b/33553066 use the constant defined in MaskableIconDrawable
+    private static final float LEGACY_ICON_SCALE = .7f * .6667f;
 
     private static final Rect sOldBounds = new Rect();
     private static final Canvas sCanvas = new Canvas();
@@ -168,7 +171,7 @@ public class LauncherIcons {
      * @param scale the scale to apply before drawing {@param icon} on the canvas
      */
     public static Bitmap createIconBitmap(Drawable icon, Context context, float scale) {
-        icon = castToMaskableIconDrawable(icon);
+        icon = wrapToMaskableIconDrawable(context, icon);
         synchronized (sCanvas) {
             final int iconBitmapSize = LauncherAppState.getIDP(context).iconBitmapSize;
 
@@ -224,17 +227,31 @@ public class LauncherIcons {
         }
     }
 
-    static Drawable castToMaskableIconDrawable(Drawable drawable) {
+    /**
+     * If the platform is running O but the app is not providing MaskableIconDrawable, then
+     * shrink the legacy icon and set it as foreground. Use color drawable as background to
+     * create MaskableIconDrawable.
+     */
+    static Drawable wrapToMaskableIconDrawable(Context context, Drawable drawable) {
         if (!(ProviderConfig.IS_DOGFOOD_BUILD && Utilities.isAtLeastO())) {
             return drawable;
         }
+        int color = context.getResources().getColor(R.color.legacy_icon_background);
+        ColorDrawable colorDrawable = new ColorDrawable(color);
+        ScaleDrawable scaleDrawable = new ScaleDrawable(drawable,
+                Gravity.CENTER, LEGACY_ICON_SCALE, LEGACY_ICON_SCALE);
+        scaleDrawable.setLevel(1);
         try {
             Class clazz = Class.forName("android.graphics.drawable.MaskableIconDrawable");
-            Method method = clazz.getDeclaredMethod("wrap", Drawable.class);
-            return (Drawable) method.invoke(null, drawable);
+            if (!clazz.isAssignableFrom(drawable.getClass())){
+
+                return (Drawable) clazz.getConstructor(Drawable.class, Drawable.class)
+                        .newInstance(colorDrawable, scaleDrawable);
+            }
         } catch (Exception e) {
             return drawable;
         }
+        return drawable;
     }
 
     public static Bitmap createShortcutIcon(ShortcutInfoCompat shortcutInfo, Context context) {

src/com/android/launcher3/util/SQLiteCacheHelper.java

@@ -9,6 +9,9 @@ import android.database.sqlite.SQLiteFullException;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.util.Log;
 
+import com.android.launcher3.Utilities;
+import com.android.launcher3.config.ProviderConfig;
+
 /**
  * An extension of {@link SQLiteOpenHelper} with utility methods for a single table cache DB.
  * Any exception during write operations are ignored, and any version change causes a DB reset.
@@ -16,12 +19,18 @@ import android.util.Log;
 public abstract class SQLiteCacheHelper {
     private static final String TAG = "SQLiteCacheHelper";
 
+    private static final boolean NO_ICON_CACHE = ProviderConfig.IS_DOGFOOD_BUILD &&
+            Utilities.isPropertyEnabled("MEMORY_ONLY_ICON_CACHE");
+
     private final String mTableName;
     private final MySQLiteOpenHelper mOpenHelper;
 
     private boolean mIgnoreWrites;
 
     public SQLiteCacheHelper(Context context, String name, int version, String tableName) {
+        if (NO_ICON_CACHE) {
+            name = null;
+        }
         mTableName = tableName;
         mOpenHelper = new MySQLiteOpenHelper(context, name, version);