整理：code review

app/src/main/res/drawable/ic_delete.xml

@@ -0,0 +1,21 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M21.167,7L2.833,7C2.374,7 2,6.626 2,6.167 2,5.707 2.374,5.333 2.833,5.333L21.167,5.333C21.626,5.333 22,5.707 22,6.167 22,6.626 21.626,7 21.167,7ZM21.167,7"
+      android:strokeWidth="0.835075"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M17,22L7,22C5.62,22 4.5,20.88 4.5,19.5L4.5,6.167C4.5,5.707 4.874,5.333 5.333,5.333L18.667,5.333C19.126,5.333 19.5,5.707 19.5,6.167L19.5,19.5C19.5,20.88 18.38,22 17,22ZM6.167,7v12.5c0,0.459 0.374,0.833 0.833,0.833h10c0.459,0 0.833,-0.374 0.833,-0.833L17.833,7ZM6.167,7"
+      android:strokeWidth="0.835075"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="M15.333,7L8.667,7C8.207,7 7.833,6.626 7.833,6.167L7.833,4.5c0,-1.38 1.12,-2.5 2.5,-2.5h3.333c1.38,0 2.5,1.12 2.5,2.5L16.167,6.167C16.167,6.626 15.792,7 15.333,7ZM9.5,5.333L14.5,5.333L14.5,4.5c0,-0.459 -0.374,-0.833 -0.833,-0.833L10.333,3.667C9.874,3.667 9.5,4.041 9.5,4.5ZM9.5,17c-0.459,0 -0.833,-0.374 -0.833,-0.833v-5c0,-0.459 0.374,-0.833 0.833,-0.833 0.459,0 0.833,0.374 0.833,0.833v5C10.333,16.626 9.959,17 9.5,17ZM14.5,17c-0.459,0 -0.833,-0.374 -0.833,-0.833v-5c0,-0.459 0.374,-0.833 0.833,-0.833 0.459,0 0.833,0.374 0.833,0.833v5C15.333,16.626 14.959,17 14.5,17ZM14.5,17"
+      android:strokeWidth="0.835075"
+      android:fillColor="#ffffff"
+      android:strokeColor="#00000000"/>
+</vector>