新增选择图片创建主题颜色功能

app/src/main/res/layout/view_icon.xml

@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ImageView android:id="@+id/preview"
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="48dp"
-    android:layout_height="48dp" />
+    android:layout_height="48dp"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    app:cardBackgroundColor="@android:color/transparent"
+    app:strokeWidth="0dp">
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/preview"
+        android:scaleType="centerCrop"/>
+</com.google.android.material.card.MaterialCardView>