Additional tweaks for permission checks

mobile/src/Home/Home.js

@@ -19,10 +19,11 @@ import { ifIphoneX } from "react-native-iphone-x-helper"
 import { workItemTypeText, pad, regionContainingPoints } from "../util"
 import { ensurePermission } from "../App"
 import { versionInfo } from "../version"
+import { minGPSAccuracy } from "../config"
 import pinImage from "./images/pin.png"
 
-const minGPSAccuracy = 20
 const neverAskForLocationPermissionKeyName = "NeverAskForLocationPermission"
+const neverAskForCameraKeyName = "NeverAskForCameraPermission"
 
 export class Home extends React.Component {
   constructor(props) {
@@ -37,6 +38,7 @@ export class Home extends React.Component {
         longitudeDelta: 0.0922,
       },
       positionInfo: null,
+      allowCameraAccess: false,
     }
 
     ensurePermission(
@@ -57,6 +59,20 @@ export class Home extends React.Component {
       }
     )
 
+    ensurePermission(
+      PermissionsAndroid.PERMISSIONS.CAMERA,
+      neverAskForCameraKeyName,
+      {
+        title: versionInfo.title,
+        message:
+          "This app needs access to your camera so that " +
+          "you can view AR items.",
+      },
+      () => {
+        this.setState({ allowCameraAccess: true })
+      }
+    )
+
     api
       .listWorkItemActivities()
       .then((list) => {