Add runtime permission checking to support new Dangerous Permissions rules in api23 and bring dependency files up to date.

Fixes and tweaks to clean up api23 compatability.

README.md

@@ -8,7 +8,7 @@ In order to use this project, you will need to:
 - Obtain the Affectiva Android SDK (visit http://www.affectiva.com/solutions/apis-sdks/)
 - Copy the contents of the SDK's assets folder into this project's app/src/main/assets folder
 - Copy the contents of the SDK's libs folder into this project's app/libs folder
-- Copy the armeabi-v7a folder (found in the SDK libs folder) into this project's app/native-libs folder
+- Copy the armeabi-v7a folder (found in the SDK libs folder) into this project's app/jniLibs folder
 - Copy your license file to this project's app/src/main/assets/Affdex folder and rename to license.txt
 - Build the project
 - Run the app and smile!

app/.gitignore

@@ -3,6 +3,6 @@
 /jniLibs/armeabi-v7a
 /libs/Affdex-sdk.jar
 /libs/Affdex-sdk-javadoc.jar
-/src/main/assets/Affdex/*.license
+/src/main/assets/Affdex/*license*
 /src/main/assets/Affdex/Classifiers
 /src/main/assets/Affdex/Classifiers/v_9

app/app.iml

@@ -67,6 +67,8 @@
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/appcompat-v7/23.1.1/jars" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/23.1.1/jars" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jniLibs" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
@@ -80,6 +82,9 @@
     </content>
     <orderEntry type="jdk" jdkName="Android API 23 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" exported="" name="support-annotations-23.1.1" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-23.1.1" level="project" />
+    <orderEntry type="library" exported="" name="appcompat-v7-23.1.1" level="project" />
     <orderEntry type="library" exported="" name="dagger-1.2.2" level="project" />
     <orderEntry type="library" exported="" name="Affdex-sdk" level="project" />
     <orderEntry type="library" exported="" name="javax.inject-1" level="project" />

app/build.gradle

@@ -6,7 +6,7 @@ android {
 
     defaultConfig {
         applicationId "com.affectiva.affdexme"
-        minSdkVersion 14
+        minSdkVersion 16
         targetSdkVersion 23
         versionCode 15
         versionName "2.1.0"
@@ -41,14 +41,14 @@ dependencies {
     compile files('libs/Affdex-sdk-javadoc.jar')
 
     //include dependencies
+    compile 'com.android.support:support-v4:23.1.1'
+    compile 'com.android.support:appcompat-v7:23.1.1'
     compile 'com.squareup.dagger:dagger:1.2.2'
     compile 'javax.inject:javax.inject:1'
 
     //although the use of the CameraDetector class in this project does not require it, you may have to include
     //the following dependencies if you use other features of the Affdex SDK
 //    compile 'com.google.code.gson:gson:2.4'
-//    compile 'com.android.support:support-v4:23.1.1'
-//    compile 'com.android.support:appcompat-v7:23.1.1'
 //    compile 'com.android.support:support-v13:23.1.1'
 //    compile 'com.google.android.gms:play-services:8.4.0'
 //    compile 'com.google.android.gms:play-services-ads:8.4.0'

app/jniLibs/READ.ME

@@ -1,3 +1,3 @@
 Place the native library files here.
 
-amreabi-v7a/libaffdexface_jni.so
+armeabi-v7a/libaffdexface_jni.so

app/libs/READ.ME

@@ -2,3 +2,5 @@ Place the Affdex SDK JARs here.
 
 Affdex-sdk.jar
 Affdex-sdk-javadoc.jar
+dagger-*.java
+javax.inject-1.jar

app/src/main/assets/Affdex/READ.ME

@@ -1,12 +1,4 @@
 Place license file and Classifiers folder here.
 
-xxxxxx.license
+license.txt
-Classifiers
+Classifiers/v_9/*
-Classifiers/v_9
-Classifiers/v_9/face_model_3d.bin
-Classifiers/v_9/CT_pack/*
-Classifiers/v_9/haarcascade/*
-Classifiers/v_9/new_pack/*
-Classifiers/v_9/noctali0.83/*
-Classifiers/v_9/PA_pack/*
-Classifiers/v_9/production_config/*

app/src/main/java/com/affectiva/affdexme/MainActivity.java

@@ -1,6 +1,7 @@
 package com.affectiva.affdexme;
 
-import android.app.Activity;
+import android.Manifest;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
@@ -8,14 +9,20 @@ import android.graphics.Typeface;
 import android.os.Bundle;
 import android.os.SystemClock;
 import android.preference.PreferenceManager;
-import android.util.Log;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
 import android.util.DisplayMetrics;
+import android.util.Log;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.SurfaceView;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
+import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
@@ -23,18 +30,16 @@ import android.widget.RelativeLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import java.io.BufferedReader;
-import java.io.ByteArrayInputStream;
-import java.io.InputStreamReader;
-import java.lang.reflect.Method;
-import java.util.List;
-
 import com.affectiva.android.affdex.sdk.Frame;
 import com.affectiva.android.affdex.sdk.Frame.ROTATE;
 import com.affectiva.android.affdex.sdk.detector.CameraDetector;
 import com.affectiva.android.affdex.sdk.detector.Detector;
 import com.affectiva.android.affdex.sdk.detector.Face;
 
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
 /*
  * AffdexMe is an app that demonstrates the use of the Affectiva Android SDK.  It uses the
  * front-facing camera on your Android device to view, process and analyze live video of your face.
@@ -67,15 +72,23 @@ import com.affectiva.android.affdex.sdk.detector.Face;
  * Copyright (c) 2014 Affectiva. All rights reserved.
  */
 
-public class MainActivity extends Activity
+public class MainActivity extends AppCompatActivity
-        implements Detector.FaceListener, Detector.ImageListener, View.OnTouchListener, CameraDetector.CameraEventListener {
+        implements Detector.FaceListener, Detector.ImageListener, CameraDetector.CameraEventListener,
+        View.OnTouchListener, ActivityCompat.OnRequestPermissionsResultCallback {
 
-    private static final String LOG_TAG = "Affectiva";
     public static final int NUM_METRICS_DISPLAYED = 6;
-
+    private static final String LOG_TAG = "Affectiva";
+    //Permission-related constants and variables
+    private static final int AFFDEXME_PERMISSIONS_REQUEST = 42;  //value is arbitrary (between 0 and 255)
+    private boolean cameraPermissionsAvailable = false;
+    private boolean storagePermissionsAvailable = false;
+    //Camera variables
+    int cameraPreviewWidth = 0;
+    int cameraPreviewHeight = 0;
+    CameraDetector.CameraType cameraType;
+    boolean mirrorPoints = false;
     //Affectiva SDK Object
     private CameraDetector detector = null;
-
     //MetricsManager View UI Objects
     private RelativeLayout metricViewLayout;
     private LinearLayout leftMetricsLayout;
@@ -86,34 +99,28 @@ public class MainActivity extends Activity
     private TextView fpsPct;
     private TextView pleaseWaitTextView;
     private ProgressBar progressBar;
-
     //Other UI objects
     private ViewGroup activityLayout; //top-most ViewGroup in which all content resides
     private RelativeLayout mainLayout; //layout, to be resized, containing all UI elements
     private RelativeLayout progressBarLayout; //layout used to show progress circle while camera is starting
+    private LinearLayout permissionsUnavailableLayout; //layout used to notify the user that not enough permissions have been granted to use the app
     private SurfaceView cameraView; //SurfaceView used to display camera images
     private DrawingView drawingView; //SurfaceView containing its own thread, used to draw facial tracking dots
     private ImageButton settingsButton;
     private ImageButton cameraButton;
-
+    private Button retryPermissionsButton;
     //Application settings variables
     private int detectorProcessRate;
     private boolean isMenuVisible = false;
     private boolean isFPSVisible = false;
     private boolean isMenuShowingForFirstTime = true;
-
     //Frames Per Second (FPS) variables
     private long firstSystemTime = 0;
     private float numberOfFrames = 0;
     private long timeToUpdate = 0;
-
     //Camera-related variables
     private boolean isFrontFacingCameraDetected = true;
     private boolean isBackFacingCameraDetected = true;
-    int cameraPreviewWidth = 0;
-    int cameraPreviewHeight = 0;
-    CameraDetector.CameraType cameraType;
-    boolean mirrorPoints = false;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -122,12 +129,110 @@ public class MainActivity extends Activity
         setContentView(R.layout.activity_main);
 
         initializeUI();
+        checkForDangerousPermissions();
 
         determineCameraAvailability();
 
         initializeCameraDetector();
     }
 
+    private void checkForDangerousPermissions() {
+        cameraPermissionsAvailable =
+                ContextCompat.checkSelfPermission(
+                        getApplicationContext(),
+                        Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
+        storagePermissionsAvailable =
+                ContextCompat.checkSelfPermission(
+                        getBaseContext(),
+                        Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
+
+        if (!cameraPermissionsAvailable || !storagePermissionsAvailable) {
+
+            // Should we show an explanation?
+            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) ||
+                    ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
+
+                // Show an explanation to the user *asynchronously* -- don't block
+                // this thread waiting for the user's response! After the user
+                // sees the explanation, try again to request the permission.
+                showPermissionExplanationDialog();
+            } else {
+                // No explanation needed, we can request the permission.
+                requestNeededPermissions();
+            }
+        }
+    }
+
+    private void requestNeededPermissions() {
+        List<String> neededPermissions = new ArrayList<>();
+
+        if (!cameraPermissionsAvailable) {
+            neededPermissions.add(Manifest.permission.CAMERA);
+        }
+        if (!storagePermissionsAvailable) {
+            neededPermissions.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
+        }
+
+        ActivityCompat.requestPermissions(
+                this,
+                neededPermissions.toArray(new String[neededPermissions.size()]),
+                AFFDEXME_PERMISSIONS_REQUEST);
+
+        // AFFDEXME_PERMISSIONS_REQUEST is an app-defined int constant that must be between 0 and 255.
+        // The callback method gets the result of the request.
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+
+        if (requestCode == AFFDEXME_PERMISSIONS_REQUEST) {
+            for (int i = 0; i < permissions.length; i++) {
+                String permission = permissions[i];
+                int grantResult = grantResults[i];
+
+                if (permission.equals(Manifest.permission.CAMERA)) {
+                    cameraPermissionsAvailable = (grantResult == PackageManager.PERMISSION_GRANTED);
+                }
+                if (permission.equals(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+                    storagePermissionsAvailable = (grantResult == PackageManager.PERMISSION_GRANTED);
+                }
+            }
+        }
+
+        if (!cameraPermissionsAvailable || !storagePermissionsAvailable) {
+            permissionsUnavailableLayout.setVisibility(View.VISIBLE);
+        } else {
+            permissionsUnavailableLayout.setVisibility(View.GONE);
+        }
+    }
+
+    private void showPermissionExplanationDialog() {
+        final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
+                getApplicationContext());
+
+        // set title
+        alertDialogBuilder.setTitle(getResources().getString(R.string.insufficient_permissions));
+
+        // set dialog message
+        alertDialogBuilder
+                .setMessage(getResources().getString(R.string.permissions_needed_explanation))
+                .setCancelable(false)
+                .setPositiveButton(getResources().getString(R.string.understood), new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                        dialog.cancel();
+                        requestNeededPermissions();
+                    }
+                });
+
+        // create alert dialog
+        AlertDialog alertDialog = alertDialogBuilder.create();
+
+        // show it
+        alertDialog.show();
+    }
+
+
     /**
      * We check to make sure the device has a front-facing camera.
      * If it does not, we obscure the app with a notice informing the user they cannot
@@ -161,6 +266,7 @@ public class MainActivity extends Activity
         //Get handles to UI objects
         activityLayout = (ViewGroup) findViewById(android.R.id.content);
         progressBarLayout = (RelativeLayout) findViewById(R.id.progress_bar_cover);
+        permissionsUnavailableLayout = (LinearLayout) findViewById(R.id.permissionsUnavialableLayout);
         metricViewLayout = (RelativeLayout) findViewById(R.id.metric_view_group);
         leftMetricsLayout = (LinearLayout) findViewById(R.id.left_metrics);
         rightMetricsLayout = (LinearLayout) findViewById(R.id.right_metrics);
@@ -173,6 +279,7 @@ public class MainActivity extends Activity
         cameraButton = (ImageButton) findViewById(R.id.camera_button);
         progressBar = (ProgressBar) findViewById(R.id.progress_bar);
         pleaseWaitTextView = (TextView) findViewById(R.id.please_wait_textview);
+        retryPermissionsButton = (Button) findViewById(R.id.retryPermissionsButton);
 
         //Initialize views to display metrics
         metricNames = new TextView[NUM_METRICS_DISPLAYED];
@@ -235,6 +342,13 @@ public class MainActivity extends Activity
 
             }
         });
+
+        retryPermissionsButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                requestNeededPermissions();
+            }
+        });
     }
 
     void initializeCameraDetector() {
@@ -246,8 +360,7 @@ public class MainActivity extends Activity
         detector = new CameraDetector(this, CameraDetector.CameraType.CAMERA_FRONT, cameraView);
 
         // update the license path here if you name your file something else
-//        detector.setLicensePath("license.txt");
+        detector.setLicensePath("license.txt");
-        detector.setLicensePath("Affectiva.license");
         detector.setImageListener(this);
         detector.setFaceListener(this);
         detector.setOnCameraEventListener(this);
@@ -259,6 +372,7 @@ public class MainActivity extends Activity
     @Override
     public void onResume() {
         super.onResume();
+        checkForDangerousPermissions();
         restoreApplicationSettings();
         setMenuVisible(true);
         isMenuShowingForFirstTime = true;
@@ -333,7 +447,7 @@ public class MainActivity extends Activity
 
     /**
      * Reset the variables used to calculate processed frames per second.
-     * **/
+     **/
     public void resetFPSCalculations() {
         firstSystemTime = SystemClock.elapsedRealtime();
         timeToUpdate = firstSystemTime + 1000L;
@@ -359,6 +473,12 @@ public class MainActivity extends Activity
 
     void mainWindowResumedTasks() {
 
+        //Notify the user that they can't use the app without authorizing these permissions.
+        if (!cameraPermissionsAvailable || !storagePermissionsAvailable) {
+            permissionsUnavailableLayout.setVisibility(View.VISIBLE);
+            return;
+        }
+
         startDetector();
 
         if (!drawingView.isDimensionsNeeded()) {
@@ -390,7 +510,6 @@ public class MainActivity extends Activity
     }
 
 
-
     @Override
     public void onFaceDetectionStarted() {
         leftMetricsLayout.animate().alpha(1); //make left and right metrics appear
@@ -517,10 +636,9 @@ public class MainActivity extends Activity
     }
 
 
-
     /**
      * When the user taps the screen, hide the menu if it is visible and show it if it is hidden.
-     * **/
+     **/
     void setMenuVisible(boolean b) {
         isMenuShowingForFirstTime = false;
         isMenuVisible = b;
@@ -533,8 +651,7 @@ public class MainActivity extends Activity
                     View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                             | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                             | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
-        }
+        } else {
-        else {
 
             //We hide the navigation bar
             getWindow().getDecorView().setSystemUiVisibility(

app/src/main/java/com/affectiva/affdexme/MetricDisplay.java

@@ -69,7 +69,7 @@ public class MetricDisplay extends View {
             textPaint.setColor(a.getColor(R.styleable.custom_attributes_textColor, Color.BLACK));
             textSize = a.getDimensionPixelSize(R.styleable.custom_attributes_textSize, textSize);
             textPaint.setTextSize(textSize);
-            halfWidth = a.getDimensionPixelSize(R.styleable.custom_attributes_barLength,100)/2;
+            halfWidth = a.getDimensionPixelSize(R.styleable.custom_attributes_metricBarLength,100)/2;
             a.recycle();
         } else {
             textPaint.setColor(Color.BLACK);

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

@@ -1,93 +1,102 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
     xmlns:custom="http://schemas.android.com/apk/res-auto"
-    android:layout_gravity="center"
+    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
     android:id="@+id/main_layout"
-    android:layout_height="match_parent"  tools:context=".MainActivity" android:focusable="true"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_gravity="center"
+    android:focusable="true"
     android:focusableInTouchMode="true"
     android:keepScreenOn="true"
-    >
+    tools:context=".MainActivity">
+
     <SurfaceView
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_centerInParent="true"
         android:id="@+id/camera_preview"
-        />
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_centerInParent="true" />
+
     <com.affectiva.affdexme.DrawingView
+        android:id="@+id/drawing_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_centerInParent="true"
-        custom:measurements_text_size="@dimen/measurements_text_size"
-        custom:measurements_upper_spacing="@dimen/measurements_upper_text_spacing"
-        custom:measurements_lower_spacing="@dimen/measurements_lower_text_spacing"
         custom:measurements_color="#DDDDDD"
+        custom:measurements_lower_spacing="@dimen/measurements_lower_text_spacing"
         custom:measurements_text_border_color="@color/letter_gray"
         custom:measurements_text_border_thickness="@integer/measurements_text_border_thickness"
-        android:id="@+id/drawing_view"/>
+        custom:measurements_text_size="@dimen/measurements_text_size"
-    <include layout="@layout/metric_layout"
+        custom:measurements_upper_spacing="@dimen/measurements_upper_text_spacing" />
+
+    <include
         android:id="@+id/metric_view_group"
-        />
+        layout="@layout/metric_layout" />
+
     <ImageButton
+        android:id="@+id/settings_button"
         android:layout_width="@dimen/settings_button_size"
         android:layout_height="@dimen/settings_button_size"
-        android:background="@null"
-        android:src="@drawable/settings_button_selector"
-        android:scaleType="fitCenter"
-        android:layout_margin="@dimen/settings_button_margin"
-        android:contentDescription="@string/settings_content_description"
         android:layout_alignParentRight="true"
         android:layout_below="@id/metric_view_group"
-        android:id="@+id/settings_button"
+        android:layout_margin="@dimen/settings_button_margin"
-        android:onClick="settings_button_click"/>
+        android:background="@null"
+        android:contentDescription="@string/settings_content_description"
+        android:onClick="settings_button_click"
+        android:scaleType="fitCenter"
+        android:src="@drawable/settings_button_selector" />
+
     <ImageButton
+        android:id="@+id/camera_button"
         android:layout_width="@dimen/settings_button_size"
         android:layout_height="@dimen/settings_button_size"
-        android:background="@null"
-        android:src="@drawable/camera_button_selector"
-        android:scaleType="fitCenter"
-        android:layout_margin="@dimen/settings_button_margin"
-        android:contentDescription="Switch camera button"
         android:layout_alignParentRight="true"
         android:layout_below="@id/settings_button"
-        android:id="@+id/camera_button"
+        android:layout_margin="@dimen/settings_button_margin"
-        android:onClick="camera_button_click"/>
+        android:background="@null"
+        android:contentDescription="Switch camera button"
+        android:onClick="camera_button_click"
+        android:scaleType="fitCenter"
+        android:src="@drawable/camera_button_selector" />
 
+    <include layout="@layout/insufficent_permissions_panel" />
 
     <RelativeLayout
+        android:id="@+id/progress_bar_cover"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:id="@+id/progress_bar_cover"
         android:background="@color/black">
 
         <TextView
+            style="@android:style/TextAppearance.Holo.Medium.Inverse"
+            android:id="@+id/please_wait_textview"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_centerVertical="true"
-            android:id="@+id/please_wait_textview"
-            android:text="@string/loading"
-            android:textSize="@dimen/please_wait_textview_size"
             android:layout_centerHorizontal="true"
-            />
+            android:layout_centerVertical="true"
+            android:text="@string/loading"
+            android:textSize="@dimen/please_wait_textview_size" />
+
         <ProgressBar
+            android:id="@+id/progress_bar"
             android:layout_width="@dimen/please_wait_textview_size"
             android:layout_height="@dimen/please_wait_textview_size"
-            android:layout_toLeftOf="@id/please_wait_textview"
             android:layout_centerVertical="true"
+            android:layout_toLeftOf="@id/please_wait_textview"
             android:indeterminate="true"
-            android:paddingRight="10dp"
+            android:paddingRight="10dp" />
-            android:id="@+id/progress_bar"/>
+
         <TextView
+            style="@android:style/TextAppearance.Holo.Medium.Inverse"
+            android:id="@+id/not_found_textview"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:text="@string/not_found"
-            android:padding="20sp"
-            android:textColor="#CCCCCC"
             android:background="@color/black"
             android:gravity="center"
-            android:id="@+id/not_found_textview"
+            android:padding="20sp"
-            android:visibility="gone"
+            android:text="@string/not_found"
-            android:textSize="20sp"/>
+            android:textColor="#CCCCCC"
+            android:textSize="20sp"
+            android:visibility="gone" />
     </RelativeLayout>
 </RelativeLayout>
 

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

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/permissionsUnavialableLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/black"
+    android:orientation="vertical"
+    android:gravity="center"
+    android:visibility="gone">
+
+    <TextView
+        style="@android:style/TextAppearance.Holo.Large.Inverse"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/bottom_padding"
+        android:text="@string/insufficient_permissions" />
+
+    <ImageView
+        android:layout_width="100dp"
+        android:layout_height="100dp"
+        android:layout_marginBottom="@dimen/bottom_padding"
+        android:contentDescription="@string/error"
+        android:src="@android:drawable/presence_busy" />
+
+    <TextView
+        style="@android:style/TextAppearance.Holo.Small.Inverse"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/bottom_padding"
+        android:gravity="center"
+        android:text="@string/permissions_needed_explanation" />
+
+    <Button
+        android:id="@+id/retryPermissionsButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/retry" />
+
+</LinearLayout>

app/src/main/res/values/attrs.xml

@@ -3,7 +3,7 @@
     <declare-styleable name="custom_attributes">
         <attr name="textSize" format="dimension" />
         <attr name="textColor" format="color"/>
-        <attr name="barLength" format="dimension"/>
+        <attr name="metricBarLength" format="dimension"/>
         <attr name="textDepth" format="dimension"/>
     </declare-styleable>
     <declare-styleable name="drawing_view_attributes">

app/src/main/res/values/metricStylePct.xml

@@ -6,6 +6,6 @@
         <item name="android:layout_gravity">center</item>
         <item name="textColor">@color/letter_gray</item>
         <item name="textSize">@dimen/pct_text_size</item>
-        <item name="barLength">@dimen/metric_view_bar_length</item>
+        <item name="metricBarLength">@dimen/metric_view_bar_length</item>
     </style>
 </resources>

app/src/main/res/values/strings.xml

@@ -6,6 +6,11 @@
     <string name="loading">Loading&#8230;</string>
     <string name="settings_content_description">Settings</string>
 
+    <string name="insufficient_permissions">Insufficient Permissions</string>
+    <string name="permissions_needed_explanation">This app requires the permission to access your camera to be able to gather facial images to process, and permission to write to the storage on your device so that we can temporarily store video data there while we process it.</string>
+    <string name="error">Error</string>
+    <string name="understood">Understood</string>
+
     <!--MetricSelectionFragment strings-->
     <string name="clear_all">Clear All</string>
     <string name="metric_chooser_default_message">0 metrics chosen.</string>
@@ -31,4 +36,5 @@
 
     <string name="show_fps_title">Show FPS</string>
     <string name="show_fps_message">Display the actual processed frames per second.</string>
+    <string name="retry">Retry</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -1,5 +1,5 @@
 <resources>
-    <style name="MainActivityTheme" parent="android:Theme.DeviceDefault.NoActionBar">
+    <style name="MainActivityTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="android:windowBackground">@color/black</item>
     </style>