1 files changed, 65 insertions, 0 deletions
diff --git a/platform_tools/android/apps/arcore/src/main/java/org/skia/arcore/CameraPermissionHelper.java b/platform_tools/android/apps/arcore/src/main/java/org/skia/arcore/CameraPermissionHelper.java
new file mode 100644
index 0000000000..3499ec00f3
--- /dev/null
+++ b/platform_tools/android/apps/arcore/src/main/java/org/skia/arcore/CameraPermissionHelper.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2017 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.skia.arcore;
+
+import android.Manifest;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.provider.Settings;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+
+/**
+ * Helper to ask camera permission.
+ */
+public class CameraPermissionHelper {
+    private static final String CAMERA_PERMISSION = Manifest.permission.CAMERA;
+    private static final int CAMERA_PERMISSION_CODE = 0;
+
+    /**
+     * Check to see we have the necessary permissions for this app.
+     */
+    public static boolean hasCameraPermission(Activity activity) {
+        return ContextCompat.checkSelfPermission(activity, CAMERA_PERMISSION)
+                == PackageManager.PERMISSION_GRANTED;
+    }
+
+    /**
+     * Check to see we have the necessary permissions for this app, and ask for them if we don't.
+     */
+    public static void requestCameraPermission(Activity activity) {
+        ActivityCompat.requestPermissions(
+                activity, new String[]{CAMERA_PERMISSION}, CAMERA_PERMISSION_CODE);
+    }
+
+    /**
+     * Check to see if we need to show the rationale for this permission.
+     */
+    public static boolean shouldShowRequestPermissionRationale(Activity activity) {
+        return ActivityCompat.shouldShowRequestPermissionRationale(activity, CAMERA_PERMISSION);
+    }
+
+    /**
+     * Launch Application Setting to grant permission.
+     */
+    public static void launchPermissionSettings(Activity activity) {
+        Intent intent = new Intent();
+        intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+        intent.setData(Uri.fromParts("package", activity.getPackageName(), null));
+        activity.startActivity(intent);
+    }
+}