ProjectLaogai/app/src/main/res/drawable/ic_add_black_24dp.xml

<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="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"
      android:fillColor="#000000"/>
</vector>