Read part one of this article from the following link.

Introduction

Android is one of the most popular operating systems for mobiles. In this article, I will show you how to detect a face with the help of Microsoft Face API.
Requirements
Step 1
Go to the activity_main.xml file and click the text button. This XML file contains the designing code for the Android app. In activity_main.xml, copy and paste the below code.
Activity_main.xml code
  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
  3. android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
  4. android:paddingRight="@dimen/activity_horizontal_margin"
  5. android:paddingTop="@dimen/activity_vertical_margin"
  6. android:paddingBottom="@dimen/activity_vertical_margin"
  7. android:orientation="vertical"
  8. tools:context=".ui.MainActivity">
  9. <LinearLayout
  10. android:layout_width="match_parent"
  11. android:layout_height="0dp"
  12. android:layout_weight="1"
  13. android:orientation="horizontal"
  14. android:layout_marginBottom="@dimen/view_margin" >
  16. <ScrollView
  17. android:layout_width="0dp"
  18. android:layout_weight="1"
  19. android:layout_height="match_parent" >
  21. <TextView
  22. android:layout_width="match_parent"
  23. android:layout_height="wrap_content"
  24. android:layout_gravity="center_vertical"
  25. android:gravity="center_vertical"
  26. android:text="@string/detection_description" />
  28. </ScrollView>
  30. <Button
  31. android:layout_width="0dp"
  32. android:layout_height="wrap_content"
  33. android:layout_gravity="center"
  34. android:text="@string/detection"
  35. android:layout_weight="1"
  36. android:layout_marginLeft="@dimen/view_margin"
  37. android:layout_marginStart="@dimen/view_margin"
  38. android:onClick="detection"
  39. style="@style/ButtonStyle" />
  41. </LinearLayout>
  42. </LinearLayout>
Android
Step 2
Create a new activity_detection.xml file (File ⇒ New ⇒Activity⇒Empty_activity).
Go to activity_detection.xml, and click the text button. This XML file contains the designing code for Android app. In activity_detection.xml, copy and paste the below code.
activity_detection.xml code
  1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
  3. android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
  4. android:paddingRight="@dimen/activity_horizontal_margin"
  5. android:paddingTop="@dimen/activity_vertical_margin"
  6. android:paddingBottom="@dimen/activity_vertical_margin"
  7. tools:context="ganeshannt.faceapi.ui.DetectionActivity">
  9. <LinearLayout
  10. android:layout_width="match_parent"
  11. android:layout_height="match_parent"
  12. android:layout_alignParentTop="true"
  14. android:layout_marginBottom="@dimen/view_margin"
  15. android:baselineAligned="false"
  16. android:orientation="vertical" >
  18. <RelativeLayout
  19. android:layout_width="match_parent"
  20. android:layout_height="0dp"
  21. android:layout_weight="1"
  22. android:layout_marginBottom="@dimen/view_margin">
  24. <RelativeLayout
  25. android:id="@+id/image_control"
  26. android:layout_width="100dp"
  27. android:layout_height="match_parent"
  28. android:layout_marginRight="@dimen/view_margin"
  29. android:layout_marginEnd="@dimen/view_margin" >
  31. <TextView
  32. android:layout_width="wrap_content"
  33. android:layout_height="wrap_content"
  34. android:layout_alignParentTop="true"
  35. android:layout_alignParentLeft="true"
  36. android:layout_alignParentStart="true"
  37. android:text="@string/image" />
  39. <Button
  40. android:id="@+id/select_image"
  41. android:layout_width="match_parent"
  42. android:layout_height="wrap_content"
  43. android:layout_centerVertical="true"
  44. android:layout_alignParentLeft="true"
  45. android:layout_alignParentStart="true"
  46. android:text="@string/select_image"
  47. android:onClick="selectImage"
  48. style="@style/ButtonStyle" />
  50. </RelativeLayout>
  52. <ImageView
  53. android:id="@id/image"
  54. android:layout_width="match_parent"
  55. android:layout_height="match_parent"
  56. android:layout_toRightOf="@id/image_control"
  57. android:layout_toEndOf="@id/image_control"
  58. android:background="#E0E0E0"
  59. android:contentDescription="@string/detection" />
  61. </RelativeLayout>
  63. <TextView
  64. android:layout_width="wrap_content"
  65. android:layout_height="wrap_content"
  66. android:text="@string/result" />
  68. <ListView
  69. android:id="@+id/list_detected_faces"
  70. android:layout_width="match_parent"
  71. android:layout_height="0dp"
  72. android:layout_weight="1"
  73. android:background="#E0E0E0"
  74. android:verticalSpacing="@dimen/view_margin" />
  76. </LinearLayout>
  78. <TextView
  79. android:id="@+id/info"
  80. android:layout_width="wrap_content"
  81. android:layout_height="wrap_content"
  82. android:layout_centerHorizontal="true"
  83. android:layout_above="@+id/button_bar"
  84. android:layout_gravity="center" />
  86. <LinearLayout
  87. android:id="@+id/button_bar"
  88. android:layout_width="match_parent"
  89. android:layout_height="wrap_content"
  90. android:layout_alignParentBottom="true"
  91. android:orientation="horizontal" >
  93. <Button
  94. android:id="@+id/detect"
  95. android:layout_width="0dp"
  96. android:layout_height="match_parent"
  97. android:layout_weight="1"
  98. android:layout_marginRight="@dimen/view_margin"
  99. android:layout_marginEnd="@dimen/view_margin"
  100. android:text="@string/detect"
  101. android:onClick="detect"
  102. style="@style/ButtonStyle" />
  104. <Button
  105. android:id="@+id/view_log"
  106. android:layout_width="0dp"
  107. android:layout_height="match_parent"
  108. android:layout_weight="1"
  109. android:text="@string/view_log"
  110. android:background="@drawable/button_background"
  111. android:onClick="viewLog"
  112. style="@style/ButtonStyle" />
  114. </LinearLayout>
  116. </RelativeLayout>
Android
Step 3
Create new activity_select_image.xml file (File ⇒ New ⇒Activity⇒Empty_activity).
Go to activity_select_image.xml and click the text bottom. In activity_select_image.xml, copy and paste the below code.
activity_select_image.xml code
  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools"
  3. android:layout_width="match_parent"
  4. android:layout_height="match_parent"
  5. android:paddingLeft="@dimen/activity_horizontal_margin"
  6. android:paddingRight="@dimen/activity_horizontal_margin"
  7. android:paddingTop="@dimen/activity_vertical_margin"
  8. android:paddingBottom="@dimen/activity_vertical_margin"
  9. android:baselineAligned="false"
  10. android:orientation="vertical"
  11. tools:context="ganeshannt.faceapi.ui.SelectImageActivity">
  13. <RelativeLayout android:layout_width="match_parent"
  14. android:layout_height="match_parent"
  15. android:layout_weight="2">
  17. <Button
  18. android:id="@+id/button_take_a_photo"
  19. android:layout_width="match_parent"
  20. android:layout_height="wrap_content"
  21. android:text="@string/take_photo"
  22. android:layout_centerHorizontal="true"
  23. android:layout_alignParentBottom="true"
  24. android:onClick="takePhoto"
  25. style="@style/ButtonStyle" />
  27. <TextView
  28. android:id="@id/info"
  29. android:layout_width="wrap_content"
  30. android:layout_height="wrap_content"
  31. android:layout_centerHorizontal="true"
  32. android:layout_above="@id/button_take_a_photo"
  33. android:layout_gravity="center" />
  35. </RelativeLayout>
  37. <RelativeLayout android:layout_width="match_parent"
  38. android:layout_height="match_parent"
  39. android:layout_weight="1">
  41. <Button
  42. android:id="@+id/button_select_a_photo_in_album"
  43. android:layout_width="match_parent"
  44. android:layout_height="wrap_content"
  45. android:text="@string/select_image_in_album"
  46. android:layout_centerHorizontal="true"
  47. android:layout_centerVertical="true"
  48. android:onClick="selectImageInAlbum"
  49. style="@style/ButtonStyle" />
  50. </RelativeLayout>
  52. </LinearLayout>
Android
Step 4
Create a new item_face_with_description.xml file (File ⇒ New ⇒Activity⇒Empty_activity).
Go to item_face_with_description.xml, then click the text bottom. In item_face_with_description.xml, copy and paste the below code.
item_face_with_description.xml code
  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. android:orientation="horizontal"
  3. android:layout_width="match_parent"
  4. android:layout_height="wrap_content">
  6. <ImageView
  7. android:id="@+id/face_thumbnail"
  8. android:layout_width="80dp"
  9. android:layout_height="80dp" />
  11. <TextView
  12. android:layout_width="wrap_content"
  13. android:layout_height="wrap_content"
  14. android:layout_gravity="center_vertical"
  15. android:layout_marginLeft="@dimen/view_margin"
  16. android:layout_marginStart="@dimen/view_margin"
  17. android:id="@+id/text_detected_face" />
  19. </LinearLayout>
Step 5
In MainActivity.java file, copy and paste the below code. Do not replace your package name otherwise the app will not run.
MainActivity.java code
  1. package ganeshannt.faceapi.ui;
  3. import android.app.AlertDialog;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.support.v7.app.AppCompatActivity;
  7. import android.view.View;
  9. import ganeshannt.faceapi.R;
  11. public class MainActivity extends AppCompatActivity {
  12. @Override
  13. protected void onCreate(Bundle savedInstanceState) {
  14. super.onCreate(savedInstanceState);
  15. setContentView(R.layout.activity_main);
  17. if (getString(R.string.subscription_key).startsWith("Please")) {
  18. new AlertDialog.Builder(this)
  19. .setTitle(getString(R.string.add_subscription_key_tip_title))
  20. .setMessage(getString(R.string.add_subscription_key_tip))
  21. .setCancelable(false)
  22. .show();
  23. }
  24. }
  26. public void detection(View view) {
  27. Intent intent = new Intent(this, DetectionActivity.class);
  28. startActivity(intent);
  29. }
  31. }
Step 6
Create three (name : helper , log , ui) Android package folders (java->>new->>folder->>package folder).
Step 7
In the helper folder, create a file (class name: embeddedgridview,Imagehelper,storagehelper ) (File ⇒ New ⇒Java class).
In EmbeddedGridView.java, copy and paste the below code. Do not replace your package name otherwise app will not run.
EmbeddedGridView.java code
  1. package ganeshannt.faceapi.helper;
  3. import android.content.Context;
  4. import android.util.AttributeSet;
  5. import android.widget.GridView;
  7. public class EmbeddedGridView extends GridView {
  8. public EmbeddedGridView(Context context, AttributeSet attrs) {
  9. super(context, attrs);
  10. }
  12. @Override
  13. protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  14. int newHeightMeasureSpec =
  15. MeasureSpec.makeMeasureSpec(MEASURED_SIZE_MASK, MeasureSpec.AT_MOST);
  17. super.onMeasure(widthMeasureSpec, newHeightMeasureSpec);
  18. getLayoutParams().height = getMeasuredHeight();
  19. }
  20. }
ImageHelper.java code
It is used to pick the image from photos album.
  1. package ganeshannt.faceapi.helper;
  3. import android.content.ContentResolver;
  4. import android.database.Cursor;
  5. import android.graphics.Bitmap;
  6. import android.graphics.BitmapFactory;
  7. import android.graphics.Canvas;
  8. import android.graphics.Color;
  9. import android.graphics.Matrix;
  10. import android.graphics.Paint;
  11. import android.graphics.Rect;
  12. import android.media.ExifInterface;
  13. import android.net.Uri;
  14. import android.provider.MediaStore;
  16. import com.microsoft.projectoxford.face.contract.Face;
  20. import com.microsoft.projectoxford.face.contract.FaceRectangle;
  22. import java.io.IOException;
  23. import java.io.InputStream;
  25. /**
  26. * Defined several functions to load, draw, save, resize, and rotate images.
  27. */
  28. public class ImageHelper {
  30. // The maximum side length of the image to detect, to keep the size of image less than 4MB.
  31. // Resize the image if its side length is larger than the maximum.
  32. private static final int IMAGE_MAX_SIDE_LENGTH = 1280;
  34. // Ratio to scale a detected face rectangle, the face rectangle scaled up looks more natural.
  35. private static final double FACE_RECT_SCALE_RATIO = 1.3;
  37. // Decode image from imageUri, and resize according to the expectedMaxImageSideLength
  38. // If expectedMaxImageSideLength is
  39. // (1) less than or equal to 0,
  40. // (2) more than the actual max size length of the bitmap
  41. // then return the original bitmap
  42. // Else, return the scaled bitmap
  43. public static Bitmap loadSizeLimitedBitmapFromUri(
  44. Uri imageUri,
  45. ContentResolver contentResolver) {
  46. try {
  47. // Load the image into InputStream.
  48. InputStream imageInputStream = contentResolver.openInputStream(imageUri);
  50. // For saving memory, only decode the image meta and get the side length.
  51. BitmapFactory.Options options = new BitmapFactory.Options();
  52. options.inJustDecodeBounds = true;
  53. Rect outPadding = new Rect();
  54. BitmapFactory.decodeStream(imageInputStream, outPadding, options);
  56. // Calculate shrink rate when loading the image into memory.
  57. int maxSideLength =
  58. options.outWidth > options.outHeight ? options.outWidth: options.outHeight;
  59. options.inSampleSize = 1;
  60. options.inSampleSize = calculateSampleSize(maxSideLength, IMAGE_MAX_SIDE_LENGTH);
  61. options.inJustDecodeBounds = false;
  62. if (imageInputStream != null) {
  63. imageInputStream.close();
  64. }
  66. // Load the bitmap and resize it to the expected size length
  67. imageInputStream = contentResolver.openInputStream(imageUri);
  68. Bitmap bitmap = BitmapFactory.decodeStream(imageInputStream, outPadding, options);
  69. maxSideLength = bitmap.getWidth() > bitmap.getHeight()
  70. ? bitmap.getWidth(): bitmap.getHeight();
  71. double ratio = IMAGE_MAX_SIDE_LENGTH / (double) maxSideLength;
  72. if (ratio < 1) {
  73. bitmap = Bitmap.createScaledBitmap(
  74. bitmap,
  75. (int)(bitmap.getWidth() * ratio),
  76. (int)(bitmap.getHeight() * ratio),
  77. false);
  78. }
  80. return rotateBitmap(bitmap, getImageRotationAngle(imageUri, contentResolver));
  81. } catch (Exception e) {
  82. return null;
  83. }
  84. }
  86. // Draw detected face rectangles in the original image. And return the image drawn.
  87. // If drawLandmarks is set to be true, draw the five main landmarks of each face.
  88. public static Bitmap drawFaceRectanglesOnBitmap(
  89. Bitmap originalBitmap, Face[] faces, boolean drawLandmarks) {
  90. Bitmap bitmap = originalBitmap.copy(Bitmap.Config.ARGB_8888, true);
  91. Canvas canvas = new Canvas(bitmap);
  93. Paint paint = new Paint();
  94. paint.setAntiAlias(true);
  95. paint.setStyle(Paint.Style.STROKE);
  96. paint.setColor(Color.GREEN);
  97. int stokeWidth = Math.max(originalBitmap.getWidth(), originalBitmap.getHeight()) / 100;
  98. if (stokeWidth == 0) {
  99. stokeWidth = 1;
  100. }
  101. paint.setStrokeWidth(stokeWidth);
  103. if (faces != null) {
  104. for (Face face : faces) {
  105. FaceRectangle faceRectangle =
  106. calculateFaceRectangle(bitmap, face.faceRectangle, FACE_RECT_SCALE_RATIO);
  108. canvas.drawRect(
  109. faceRectangle.left,
  110. faceRectangle.top,
  111. faceRectangle.left + faceRectangle.width,
  112. faceRectangle.top + faceRectangle.height,
  113. paint);
  115. if (drawLandmarks) {
  116. int radius = face.faceRectangle.width / 30;
  117. if (radius == 0) {
  118. radius = 1;
  119. }
  120. paint.setStyle(Paint.Style.FILL);
  121. paint.setStrokeWidth(radius);
  123. canvas.drawCircle(
  124. (float) face.faceLandmarks.pupilLeft.x,
  125. (float) face.faceLandmarks.pupilLeft.y,
  126. radius,
  127. paint);
  129. canvas.drawCircle(
  130. (float) face.faceLandmarks.pupilRight.x,
  131. (float) face.faceLandmarks.pupilRight.y,
  132. radius,
  133. paint);
  135. canvas.drawCircle(
  136. (float) face.faceLandmarks.noseTip.x,
  137. (float) face.faceLandmarks.noseTip.y,
  138. radius,
  139. paint);
  141. canvas.drawCircle(
  142. (float) face.faceLandmarks.mouthLeft.x,
  143. (float) face.faceLandmarks.mouthLeft.y,
  144. radius,
  145. paint);
  147. canvas.drawCircle(
  148. (float) face.faceLandmarks.mouthRight.x,
  149. (float) face.faceLandmarks.mouthRight.y,
  150. radius,
  151. paint);
  153. paint.setStyle(Paint.Style.STROKE);
  154. paint.setStrokeWidth(stokeWidth);
  155. }
  156. }
  157. }
  159. return bitmap;
  160. }
  162. // Highlight the selected face thumbnail in face list.
  163. public static Bitmap highlightSelectedFaceThumbnail(Bitmap originalBitmap) {
  164. Bitmap bitmap = originalBitmap.copy(Bitmap.Config.ARGB_8888, true);
  165. Canvas canvas = new Canvas(bitmap);
  166. Paint paint = new Paint();
  167. paint.setAntiAlias(true);
  168. paint.setStyle(Paint.Style.STROKE);
  169. paint.setColor(Color.parseColor("#3399FF"));
  170. int stokeWidth = Math.max(originalBitmap.getWidth(), originalBitmap.getHeight()) / 10;
  171. if (stokeWidth == 0) {
  172. stokeWidth = 1;
  173. }
  174. bitmap.getWidth();
  175. paint.setStrokeWidth(stokeWidth);
  176. canvas.drawRect(
  177. 0,
  178. 0,
  179. bitmap.getWidth(),
  180. bitmap.getHeight(),
  181. paint);
  183. return bitmap;
  184. }
  186. // Crop the face thumbnail out from the original image.
  187. // For better view for human, face rectangles are resized to the rate faceRectEnlargeRatio.
  188. public static Bitmap generateFaceThumbnail(
  189. Bitmap originalBitmap,
  190. FaceRectangle faceRectangle) throws IOException {
  191. FaceRectangle faceRect =
  192. calculateFaceRectangle(originalBitmap, faceRectangle, FACE_RECT_SCALE_RATIO);
  194. return Bitmap.createBitmap(
  195. originalBitmap, faceRect.left, faceRect.top, faceRect.width, faceRect.height);
  196. }
  198. // Return the number of times for the image to shrink when loading it into memory.
  199. // The SampleSize can only be a final value based on powers of 2.
  200. private static int calculateSampleSize(int maxSideLength, int expectedMaxImageSideLength) {
  201. int inSampleSize = 1;
  203. while (maxSideLength > 2 * expectedMaxImageSideLength) {
  204. maxSideLength /= 2;
  205. inSampleSize *= 2;
  206. }
  208. return inSampleSize;
  209. }
  211. // Get the rotation angle of the image taken.
  212. private static int getImageRotationAngle(
  213. Uri imageUri, ContentResolver contentResolver) throws IOException {
  214. int angle = 0;
  215. Cursor cursor = contentResolver.query(imageUri,
  216. new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null);
  217. if (cursor != null) {
  218. if (cursor.getCount() == 1) {
  219. cursor.moveToFirst();
  220. angle = cursor.getInt(0);
  221. }
  222. cursor.close();
  223. } else {
  224. ExifInterface exif = new ExifInterface(imageUri.getPath());
  225. int orientation = exif.getAttributeInt(
  226. ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
  228. switch (orientation) {
  229. case ExifInterface.ORIENTATION_ROTATE_270:
  230. angle = 270;
  231. break;
  232. case ExifInterface.ORIENTATION_ROTATE_180:
  233. angle = 180;
  234. break;
  235. case ExifInterface.ORIENTATION_ROTATE_90:
  236. angle = 90;
  237. break;
  238. default:
  239. break;
  240. }
  241. }
  242. return angle;
  243. }
  245. // Rotate the original bitmap according to the given orientation angle
  246. private static Bitmap rotateBitmap(Bitmap bitmap, int angle) {
  247. // If the rotate angle is 0, then return the original image, else return the rotated image
  248. if (angle != 0) {
  249. Matrix matrix = new Matrix();
  250. matrix.postRotate(angle);
  251. return Bitmap.createBitmap(
  252. bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
  253. } else {
  254. return bitmap;
  255. }
  256. }
  258. // Resize face rectangle, for better view for human
  259. // To make the rectangle larger, faceRectEnlargeRatio should be larger than 1, recommend 1.3
  260. private static FaceRectangle calculateFaceRectangle(
  261. Bitmap bitmap, FaceRectangle faceRectangle, double faceRectEnlargeRatio) {
  262. // Get the resized side length of the face rectangle
  263. double sideLength = faceRectangle.width * faceRectEnlargeRatio;
  264. sideLength = Math.min(sideLength, bitmap.getWidth());
  265. sideLength = Math.min(sideLength, bitmap.getHeight());
  267. // Make the left edge to left more.
  268. double left = faceRectangle.left
  269. - faceRectangle.width * (faceRectEnlargeRatio - 1.0) * 0.5;
  270. left = Math.max(left, 0.0);
  271. left = Math.min(left, bitmap.getWidth() - sideLength);
  273. // Make the top edge to top more.
  274. double top = faceRectangle.top
  275. - faceRectangle.height * (faceRectEnlargeRatio - 1.0) * 0.5;
  276. top = Math.max(top, 0.0);
  277. top = Math.min(top, bitmap.getHeight() - sideLength);
  279. // Shift the top edge to top more, for better view for human
  280. double shiftTop = faceRectEnlargeRatio - 1.0;
  281. shiftTop = Math.max(shiftTop, 0.0);
  282. shiftTop = Math.min(shiftTop, 1.0);
  283. top -= 0.15 * shiftTop * faceRectangle.height;
  284. top = Math.max(top, 0.0);
  286. // Set the result.
  287. FaceRectangle result = new FaceRectangle();
  288. result.left = (int)left;
  289. result.top = (int)top;
  290. result.width = (int)sideLength;
  291. result.height = (int)sideLength;
  292. return result;
  293. }
  294. }
StorageHelper.java code
It is used to allocate the storage space to face detecting images.
  1. package ganeshannt.faceapi.helper;
  3. import android.content.Context;
  4. import android.content.SharedPreferences;
  6. import java.util.HashSet;
  7. import java.util.List;
  8. import java.util.Set;
  10. /**
  11. * Defined several functions to manage local storage.
  12. */
  13. public class StorageHelper {
  14. public static Set<String> getAllPersonGroupIds(Context context) {
  15. SharedPreferences personGroupIdSet =
  16. context.getSharedPreferences("PersonGroupIdSet", Context.MODE_PRIVATE);
  17. return personGroupIdSet.getStringSet("PersonGroupIdSet", new HashSet<String>());
  18. }
  20. public static String getPersonGroupName(String personGroupId, Context context) {
  21. SharedPreferences personGroupIdNameMap =
  22. context.getSharedPreferences("PersonGroupIdNameMap", Context.MODE_PRIVATE);
  23. return personGroupIdNameMap.getString(personGroupId, "");
  24. }
  26. public static void setPersonGroupName(String personGroupIdToAdd, String personGroupName, Context context) {
  27. SharedPreferences personGroupIdNameMap =
  28. context.getSharedPreferences("PersonGroupIdNameMap", Context.MODE_PRIVATE);
  30. SharedPreferences.Editor personGroupIdNameMapEditor = personGroupIdNameMap.edit();
  31. personGroupIdNameMapEditor.putString(personGroupIdToAdd, personGroupName);
  32. personGroupIdNameMapEditor.commit();
  34. Set<String> personGroupIds = getAllPersonGroupIds(context);
  35. Set<String> newPersonGroupIds = new HashSet<>();
  36. for (String personGroupId: personGroupIds) {
  37. newPersonGroupIds.add(personGroupId);
  38. }
  39. newPersonGroupIds.add(personGroupIdToAdd);
  40. SharedPreferences personGroupIdSet =
  41. context.getSharedPreferences("PersonGroupIdSet", Context.MODE_PRIVATE);
  42. SharedPreferences.Editor personGroupIdSetEditor = personGroupIdSet.edit();
  43. personGroupIdSetEditor.putStringSet("PersonGroupIdSet", newPersonGroupIds);
  44. personGroupIdSetEditor.commit();
  45. }
  47. public static void deletePersonGroups(List<String> personGroupIdsToDelete, Context context) {
  48. SharedPreferences personGroupIdNameMap =
  49. context.getSharedPreferences("PersonGroupIdNameMap", Context.MODE_PRIVATE);
  50. SharedPreferences.Editor personGroupIdNameMapEditor = personGroupIdNameMap.edit();
  51. for (String personGroupId: personGroupIdsToDelete) {
  52. personGroupIdNameMapEditor.remove(personGroupId);
  53. }
  54. personGroupIdNameMapEditor.commit();
  56. Set<String> personGroupIds = getAllPersonGroupIds(context);
  57. Set<String> newPersonGroupIds = new HashSet<>();
  58. for (String personGroupId: personGroupIds) {
  59. if (!personGroupIdsToDelete.contains(personGroupId)) {
  60. newPersonGroupIds.add(personGroupId);
  61. }
  62. }
  63. SharedPreferences personGroupIdSet =
  64. context.getSharedPreferences("PersonGroupIdSet", Context.MODE_PRIVATE);
  65. SharedPreferences.Editor personGroupIdSetEditor = personGroupIdSet.edit();
  66. personGroupIdSetEditor.putStringSet("PersonGroupIdSet", newPersonGroupIds);
  67. personGroupIdSetEditor.commit();
  68. }
  70. public static Set<String> getAllPersonIds(String personGroupId, Context context) {
  71. SharedPreferences personIdSet =
  72. context.getSharedPreferences(personGroupId + "PersonIdSet", Context.MODE_PRIVATE);
  73. return personIdSet.getStringSet("PersonIdSet", new HashSet<String>());
  74. }
  76. public static String getPersonName(String personId, String personGroupId, Context context) {
  77. SharedPreferences personIdNameMap =
  78. context.getSharedPreferences(personGroupId + "PersonIdNameMap", Context.MODE_PRIVATE);
  79. return personIdNameMap.getString(personId, "");
  80. }
  82. public static void setPersonName(String personIdToAdd, String personName, String personGroupId, Context context) {
  83. SharedPreferences personIdNameMap =
  84. context.getSharedPreferences(personGroupId + "PersonIdNameMap", Context.MODE_PRIVATE);
  86. SharedPreferences.Editor personIdNameMapEditor = personIdNameMap.edit();
  87. personIdNameMapEditor.putString(personIdToAdd, personName);
  88. personIdNameMapEditor.commit();
  90. Set<String> personIds = getAllPersonIds(personGroupId, context);
  91. Set<String> newPersonIds = new HashSet<>();
  92. for (String personId: personIds) {
  93. newPersonIds.add(personId);
  94. }
  95. newPersonIds.add(personIdToAdd);
  96. SharedPreferences personIdSet =
  97. context.getSharedPreferences(personGroupId + "PersonIdSet", Context.MODE_PRIVATE);
  98. SharedPreferences.Editor personIdSetEditor = personIdSet.edit();
  99. personIdSetEditor.putStringSet("PersonIdSet", newPersonIds);
  100. personIdSetEditor.commit();
  101. }
  103. public static void deletePersons(List<String> personIdsToDelete, String personGroupId, Context context) {
  104. SharedPreferences personIdNameMap =
  105. context.getSharedPreferences(personGroupId + "PersonIdNameMap", Context.MODE_PRIVATE);
  106. SharedPreferences.Editor personIdNameMapEditor = personIdNameMap.edit();
  107. for (String personId: personIdsToDelete) {
  108. personIdNameMapEditor.remove(personId);
  109. }
  110. personIdNameMapEditor.commit();
  112. Set<String> personIds = getAllPersonIds(personGroupId, context);
  113. Set<String> newPersonIds = new HashSet<>();
  114. for (String personId: personIds) {
  115. if (!personIdsToDelete.contains(personId)) {
  116. newPersonIds.add(personId);
  117. }
  118. }
  119. SharedPreferences personIdSet =
  120. context.getSharedPreferences(personGroupId + "PersonIdSet", Context.MODE_PRIVATE);
  121. SharedPreferences.Editor personIdSetEditor = personIdSet.edit();
  122. personIdSetEditor.putStringSet("PersonIdSet", newPersonIds);
  123. personIdSetEditor.commit();
  124. }
  126. public static Set<String> getAllFaceIds(String personId, Context context) {
  127. SharedPreferences faceIdSet =
  128. context.getSharedPreferences(personId + "FaceIdSet", Context.MODE_PRIVATE);
  129. return faceIdSet.getStringSet("FaceIdSet", new HashSet<String>());
  130. }
  132. public static String getFaceUri(String faceId, Context context) {
  133. SharedPreferences faceIdUriMap =
  134. context.getSharedPreferences("FaceIdUriMap", Context.MODE_PRIVATE);
  135. return faceIdUriMap.getString(faceId, "");
  136. }
  138. public static void setFaceUri(String faceIdToAdd, String faceUri, String personId, Context context) {
  139. SharedPreferences faceIdUriMap =
  140. context.getSharedPreferences("FaceIdUriMap", Context.MODE_PRIVATE);
  142. SharedPreferences.Editor faceIdUriMapEditor = faceIdUriMap.edit();
  143. faceIdUriMapEditor.putString(faceIdToAdd, faceUri);
  144. faceIdUriMapEditor.commit();
  146. Set<String> faceIds = getAllFaceIds(personId, context);
  147. Set<String> newFaceIds = new HashSet<>();
  148. for (String faceId: faceIds) {
  149. newFaceIds.add(faceId);
  150. }
  151. newFaceIds.add(faceIdToAdd);
  152. SharedPreferences faceIdSet =
  153. context.getSharedPreferences(personId + "FaceIdSet", Context.MODE_PRIVATE);
  154. SharedPreferences.Editor faceIdSetEditor = faceIdSet.edit();
  155. faceIdSetEditor.putStringSet("FaceIdSet", newFaceIds);
  156. faceIdSetEditor.commit();
  157. }
  159. public static void deleteFaces(List<String> faceIdsToDelete, String personId, Context context) {
  160. Set<String> faceIds = getAllFaceIds(personId, context);
  161. Set<String> newFaceIds = new HashSet<>();
  162. for (String faceId: faceIds) {
  163. if (!faceIdsToDelete.contains(faceId)) {
  164. newFaceIds.add(faceId);
  165. }
  166. }
  167. SharedPreferences faceIdSet =
  168. context.getSharedPreferences(personId + "FaceIdSet", Context.MODE_PRIVATE);
  169. SharedPreferences.Editor faceIdSetEditor = faceIdSet.edit();
  170. faceIdSetEditor.putStringSet("FaceIdSet", newFaceIds);
  171. faceIdSetEditor.commit();
  172. }
  173. }
Step 8
In log folder, create file(class name:DetectionLogActivity ) (File ⇒ New ⇒Java class).
In DetectionLogActivity.java, copy and paste the below code. Do not replace your package name otherwise, the app will not run.
DetectionLogActivity.java code
  1. package ganeshannt.faceapi.log;
  3. import android.content.Context;
  4. import android.os.Bundle;
  5. import android.support.v7.app.AppCompatActivity;
  6. import android.view.LayoutInflater;
  7. import android.view.View;
  8. import android.view.ViewGroup;
  9. import android.widget.BaseAdapter;
  10. import android.widget.ListView;
  11. import android.widget.TextView;
  13. import ganeshannt.faceapi.R;
  14. import ganeshannt.faceapi.helper.LogHelper;
  16. import java.util.List;
  18. public class DetectionLogActivity extends AppCompatActivity {
  20. @Override
  21. protected void onCreate(Bundle savedInstanceState) {
  22. super.onCreate(savedInstanceState);
  23. setContentView(R.layout.activity_detection_log);
  25. LogAdapter logAdapter = new LogAdapter();
  26. ListView listView = (ListView) findViewById(R.id.log);
  27. listView.setAdapter(logAdapter);
  28. }
  30. // The adapter of the ListView which contains the detection log.
  31. private class LogAdapter extends BaseAdapter {
  32. // The detection log.
  33. List<String> log;
  35. LogAdapter() {
  36. log = LogHelper.getDetectionLog();
  37. }
  39. @Override
  40. public boolean isEnabled(int position) {
  41. return false;
  42. }
  44. @Override
  45. public int getCount() {
  46. return log.size();
  47. }
  49. @Override
  50. public Object getItem(int position) {
  51. return log.get(position);
  52. }
  54. @Override
  55. public long getItemId(int position) {
  56. return position;
  57. }
  59. @Override
  60. public View getView(final int position, View convertView, ViewGroup parent) {
  61. if (convertView == null) {
  62. LayoutInflater layoutInflater =
  63. (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  64. convertView = layoutInflater.inflate(R.layout.item_log, parent, false);
  65. }
  66. convertView.setId(position);
  68. ((TextView)convertView.findViewById(R.id.log)).setText(log.get(position));
  70. return convertView;
  71. }
  72. }
  73. }
Step 9
In ui folder, create file (class name:DetectionActivity,Select-Image_Activity,MainActivity ) (File ⇒ New ⇒Java class).
In DetectionActivity.java, copy and paste the below code. Do not replace your package name otherwise, the app will not run.
DetectionActivity.java code
  1. package ganeshannt.faceapi.ui;
  3. import android.app.ProgressDialog;
  4. import android.content.Context;
  5. import android.content.Intent;
  6. import android.graphics.Bitmap;
  7. import android.net.Uri;
  8. import android.os.AsyncTask;
  9. import android.os.Bundle;
  10. import android.support.annotation.NonNull;
  11. import android.support.v7.app.AppCompatActivity;
  12. import android.text.TextUtils;
  13. import android.view.LayoutInflater;
  14. import android.view.View;
  15. import android.view.ViewGroup;
  16. import android.widget.BaseAdapter;
  17. import android.widget.Button;
  18. import android.widget.ImageView;
  19. import android.widget.ListView;
  20. import android.widget.TextView;
  22. import com.microsoft.projectoxford.face.FaceServiceClient;
  23. import com.microsoft.projectoxford.face.contract.Accessory;
  24. import com.microsoft.projectoxford.face.contract.Blur;
  25. import com.microsoft.projectoxford.face.contract.Emotion;
  26. import com.microsoft.projectoxford.face.contract.Exposure;
  27. import com.microsoft.projectoxford.face.contract.Face;
  28. import com.microsoft.projectoxford.face.contract.FacialHair;
  29. import com.microsoft.projectoxford.face.contract.Hair;
  30. import com.microsoft.projectoxford.face.contract.HeadPose;
  31. import com.microsoft.projectoxford.face.contract.Makeup;
  32. import com.microsoft.projectoxford.face.contract.Noise;
  33. import com.microsoft.projectoxford.face.contract.Occlusion;
  34. import ganeshannt.faceapi.R;
  35. import ganeshannt.faceapi.helper.ImageHelper;
  36. import ganeshannt.faceapi.helper.LogHelper;
  37. import ganeshannt.faceapi.helper.SampleApp;
  38. import ganeshannt.faceapi.log.DetectionLogActivity;
  40. import java.io.ByteArrayInputStream;
  41. import java.io.ByteArrayOutputStream;
  42. import java.io.IOException;
  43. import java.io.InputStream;
  44. import java.text.DecimalFormat;
  45. import java.util.ArrayList;
  46. import java.util.Arrays;
  47. import java.util.List;
  49. public class DetectionActivity extends AppCompatActivity {
  50. // Background task of face detection.
  51. private class DetectionTask extends AsyncTask<InputStream, String, Face[]> {
  52. private boolean mSucceed = true;
  54. @Override
  55. protected Face[] doInBackground(InputStream... params) {
  56. // Get an instance of face service client to detect faces in image.
  57. FaceServiceClient faceServiceClient = SampleApp.getFaceServiceClient();
  58. try {
  59. publishProgress("Detecting...");
  61. // Start detection.
  62. return faceServiceClient.detect(
  63. params[0], /* Input stream of image to detect */
  64. true, /* Whether to return face ID */
  65. true, /* Whether to return face landmarks */
  66. /* Which face attributes to analyze, currently we support:
  67. age,gender,headPose,smile,facialHair */
  68. new FaceServiceClient.FaceAttributeType[] {
  69. FaceServiceClient.FaceAttributeType.Age,
  70. FaceServiceClient.FaceAttributeType.Gender,
  71. FaceServiceClient.FaceAttributeType.Smile,
  72. FaceServiceClient.FaceAttributeType.Glasses,
  73. FaceServiceClient.FaceAttributeType.FacialHair,
  74. FaceServiceClient.FaceAttributeType.Emotion,
  75. FaceServiceClient.FaceAttributeType.HeadPose,
  76. FaceServiceClient.FaceAttributeType.Accessories,
  77. FaceServiceClient.FaceAttributeType.Blur,
  78. FaceServiceClient.FaceAttributeType.Exposure,
  79. FaceServiceClient.FaceAttributeType.Hair,
  80. FaceServiceClient.FaceAttributeType.Makeup,
  81. FaceServiceClient.FaceAttributeType.Noise,
  82. FaceServiceClient.FaceAttributeType.Occlusion
  83. });
  84. } catch (Exception e) {
  85. mSucceed = false;
  86. publishProgress(e.getMessage());
  87. addLog(e.getMessage());
  88. return null;
  89. }
  90. }
  92. @Override
  93. protected void onPreExecute() {
  94. mProgressDialog.show();
  95. addLog("Request: Detecting in image " + mImageUri);
  96. }
  98. @Override
  99. protected void onProgressUpdate(String... progress) {
  100. mProgressDialog.setMessage(progress[0]);
  101. setInfo(progress[0]);
  102. }
  104. @Override
  105. protected void onPostExecute(Face[] result) {
  106. if (mSucceed) {
  107. addLog("Response: Success. Detected " + (result == null ? 0 : result.length)
  108. + " face(s) in " + mImageUri);
  109. }
  111. // Show the result on screen when detection is done.
  112. setUiAfterDetection(result, mSucceed);
  113. }
  114. }
  116. // Flag to indicate which task is to be performed.
  117. private static final int REQUEST_SELECT_IMAGE = 0;
  119. // The URI of the image selected to detect.
  120. private Uri mImageUri;
  122. // The image selected to detect.
  123. private Bitmap mBitmap;
  125. // Progress dialog popped up when communicating with server.
  126. ProgressDialog mProgressDialog;
  128. // When the activity is created, set all the member variables to initial state.
  129. @Override
  130. protected void onCreate(Bundle savedInstanceState) {
  131. super.onCreate(savedInstanceState);
  132. setContentView(R.layout.activity_detection);
  134. mProgressDialog = new ProgressDialog(this);
  135. mProgressDialog.setTitle(getString(R.string.progress_dialog_title));
  137. // Disable button "detect" as the image to detect is not selected.
  138. setDetectButtonEnabledStatus(false);
  140. LogHelper.clearDetectionLog();
  141. }
  143. // Save the activity state when it's going to stop.
  144. @Override
  145. protected void onSaveInstanceState(Bundle outState) {
  146. super.onSaveInstanceState(outState);
  148. outState.putParcelable("ImageUri", mImageUri);
  149. }
  151. // Recover the saved state when the activity is recreated.
  152. @Override
  153. protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) {
  154. super.onRestoreInstanceState(savedInstanceState);
  156. mImageUri = savedInstanceState.getParcelable("ImageUri");
  157. if (mImageUri != null) {
  158. mBitmap = ImageHelper.loadSizeLimitedBitmapFromUri(
  159. mImageUri, getContentResolver());
  160. }
  161. }
  163. // Called when image selection is done.
  164. @Override
  165. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  166. switch (requestCode) {
  167. case REQUEST_SELECT_IMAGE:
  168. if (resultCode == RESULT_OK) {
  169. // If image is selected successfully, set the image URI and bitmap.
  170. mImageUri = data.getData();
  171. mBitmap = ImageHelper.loadSizeLimitedBitmapFromUri(
  172. mImageUri, getContentResolver());
  173. if (mBitmap != null) {
  174. // Show the image on screen.
  175. ImageView imageView = (ImageView) findViewById(R.id.image);
  176. imageView.setImageBitmap(mBitmap);
  178. // Add detection log.
  179. addLog("Image: " + mImageUri + " resized to " + mBitmap.getWidth()
  180. + "x" + mBitmap.getHeight());
  181. }
  183. // Clear the detection result.
  184. FaceListAdapter faceListAdapter = new FaceListAdapter(null);
  185. ListView listView = (ListView) findViewById(R.id.list_detected_faces);
  186. listView.setAdapter(faceListAdapter);
  188. // Clear the information panel.
  189. setInfo("");
  191. // Enable button "detect" as the image is selected and not detected.
  192. setDetectButtonEnabledStatus(true);
  193. }
  194. break;
  195. default:
  196. break;
  197. }
  198. }
  200. // Called when the "Select Image" button is clicked.
  201. public void selectImage(View view) {
  202. Intent intent = new Intent(this, SelectImageActivity.class);
  203. startActivityForResult(intent, REQUEST_SELECT_IMAGE);
  204. }
  206. // Called when the "Detect" button is clicked.
  207. public void detect(View view) {
  208. // Put the image into an input stream for detection.
  209. ByteArrayOutputStream output = new ByteArrayOutputStream();
  210. mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, output);
  211. ByteArrayInputStream inputStream = new ByteArrayInputStream(output.toByteArray());
  213. // Start a background task to detect faces in the image.
  214. new DetectionTask().execute(inputStream);
  216. // Prevent button click during detecting.
  217. setAllButtonsEnabledStatus(false);
  218. }
  220. // View the log of service calls.
  221. public void viewLog(View view) {
  222. Intent intent = new Intent(this, DetectionLogActivity.class);
  223. startActivity(intent);
  224. }
  226. // Show the result on screen when detection is done.
  227. private void setUiAfterDetection(Face[] result, boolean succeed) {
  228. // Detection is done, hide the progress dialog.
  229. mProgressDialog.dismiss();
  231. // Enable all the buttons.
  232. setAllButtonsEnabledStatus(true);
  234. // Disable button "detect" as the image has already been detected.
  235. setDetectButtonEnabledStatus(false);
  237. if (succeed) {
  238. // The information about the detection result.
  239. String detectionResult;
  240. if (result != null) {
  241. detectionResult = result.length + " face"
  242. + (result.length != 1 ? "s" : "") + " detected";
  244. // Show the detected faces on original image.
  245. ImageView imageView = (ImageView) findViewById(R.id.image);
  246. imageView.setImageBitmap(ImageHelper.drawFaceRectanglesOnBitmap(
  247. mBitmap, result, true));
  249. // Set the adapter of the ListView which contains the details of the detected faces.
  250. FaceListAdapter faceListAdapter = new FaceListAdapter(result);
  252. // Show the detailed list of detected faces.
  253. ListView listView = (ListView) findViewById(R.id.list_detected_faces);
  254. listView.setAdapter(faceListAdapter);
  255. } else {
  256. detectionResult = "0 face detected";
  257. }
  258. setInfo(detectionResult);
  259. }
  261. mImageUri = null;
  262. mBitmap = null;
  263. }
  265. // Set whether the buttons are enabled.
  266. private void setDetectButtonEnabledStatus(boolean isEnabled) {
  267. Button detectButton = (Button) findViewById(R.id.detect);
  268. detectButton.setEnabled(isEnabled);
  269. }
  271. // Set whether the buttons are enabled.
  272. private void setAllButtonsEnabledStatus(boolean isEnabled) {
  273. Button selectImageButton = (Button) findViewById(R.id.select_image);
  274. selectImageButton.setEnabled(isEnabled);
  276. Button detectButton = (Button) findViewById(R.id.detect);
  277. detectButton.setEnabled(isEnabled);
  279. Button ViewLogButton = (Button) findViewById(R.id.view_log);
  280. ViewLogButton.setEnabled(isEnabled);
  281. }
  283. // Set the information panel on screen.
  284. private void setInfo(String info) {
  285. TextView textView = (TextView) findViewById(R.id.info);
  286. textView.setText(info);
  287. }
  289. // Add a log item.
  290. private void addLog(String log) {
  291. LogHelper.addDetectionLog(log);
  292. }
  294. // The adapter of the GridView which contains the details of the detected faces.
  295. private class FaceListAdapter extends BaseAdapter {
  296. // The detected faces.
  297. List<Face> faces;
  299. // The thumbnails of detected faces.
  300. List<Bitmap> faceThumbnails;
  302. // Initialize with detection result.
  303. FaceListAdapter(Face[] detectionResult) {
  304. faces = new ArrayList<>();
  305. faceThumbnails = new ArrayList<>();
  307. if (detectionResult != null) {
  308. faces = Arrays.asList(detectionResult);
  309. for (Face face : faces) {
  310. try {
  311. // Crop face thumbnail with five main landmarks drawn from original image.
  312. faceThumbnails.add(ImageHelper.generateFaceThumbnail(
  313. mBitmap, face.faceRectangle));
  314. } catch (IOException e) {
  315. // Show the exception when generating face thumbnail fails.
  316. setInfo(e.getMessage());
  317. }
  318. }
  319. }
  320. }
  322. @Override
  323. public boolean isEnabled(int position) {
  324. return false;
  325. }
  327. @Override
  328. public int getCount() {
  329. return faces.size();
  330. }
  332. @Override
  333. public Object getItem(int position) {
  334. return faces.get(position);
  335. }
  337. @Override
  338. public long getItemId(int position) {
  339. return position;
  340. }
  342. @Override
  343. public View getView(final int position, View convertView, ViewGroup parent) {
  344. if (convertView == null) {
  345. LayoutInflater layoutInflater =
  346. (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  347. convertView = layoutInflater.inflate(R.layout.item_face_with_description, parent, false);
  348. }
  349. convertView.setId(position);
  351. // Show the face thumbnail.
  352. ((ImageView) convertView.findViewById(R.id.face_thumbnail)).setImageBitmap(
  353. faceThumbnails.get(position));
  355. // Show the face details.
  356. DecimalFormat formatter = new DecimalFormat("#0.0");
  357. String face_description = String.format("Age: %s Gender: %s\nHair: %s FacialHair: %s\nMakeup: %s %s\nForeheadOccluded: %s Blur: %s\nEyeOccluded: %s %s\n" +
  358. "MouthOccluded: %s Noise: %s\nGlassesType: %s\nHeadPose: %s\nAccessories: %s",
  359. faces.get(position).faceAttributes.age,
  360. faces.get(position).faceAttributes.gender,
  361. getHair(faces.get(position).faceAttributes.hair),
  362. getFacialHair(faces.get(position).faceAttributes.facialHair),
  363. getMakeup((faces.get(position)).faceAttributes.makeup),
  364. getEmotion(faces.get(position).faceAttributes.emotion),
  365. faces.get(position).faceAttributes.occlusion.foreheadOccluded,
  366. faces.get(position).faceAttributes.blur.blurLevel,
  367. faces.get(position).faceAttributes.occlusion.eyeOccluded,
  368. faces.get(position).faceAttributes.exposure.exposureLevel,
  369. faces.get(position).faceAttributes.occlusion.mouthOccluded,
  370. faces.get(position).faceAttributes.noise.noiseLevel,
  371. faces.get(position).faceAttributes.glasses,
  372. getHeadPose(faces.get(position).faceAttributes.headPose),
  373. getAccessories(faces.get(position).faceAttributes.accessories)
  374. );
  375. ((TextView) convertView.findViewById(R.id.text_detected_face)).setText(face_description);
  377. return convertView;
  378. }
  380. private String getHair(Hair hair) {
  381. if (hair.hairColor.length == 0)
  382. {
  383. if (hair.invisible)
  384. return "Invisible";
  385. else
  386. return "Bald";
  387. }
  388. else
  389. {
  390. int maxConfidenceIndex = 0;
  391. double maxConfidence = 0.0;
  393. for (int i = 0; i < hair.hairColor.length; ++i)
  394. {
  395. if (hair.hairColor[i].confidence > maxConfidence)
  396. {
  397. maxConfidence = hair.hairColor[i].confidence;
  398. maxConfidenceIndex = i;
  399. }
  400. }
  402. return hair.hairColor[maxConfidenceIndex].color.toString();
  403. }
  404. }
  406. private String getMakeup(Makeup makeup) {
  407. return (makeup.eyeMakeup || makeup.lipMakeup) ? "Yes" : "No" ;
  408. }
  410. private String getAccessories(Accessory[] accessories) {
  411. if (accessories.length == 0)
  412. {
  413. return "NoAccessories";
  414. }
  415. else
  416. {
  417. String[] accessoriesList = new String[accessories.length];
  418. for (int i = 0; i < accessories.length; ++i)
  419. {
  420. accessoriesList[i] = accessories[i].type.toString();
  421. }
  423. return TextUtils.join(",", accessoriesList);
  424. }
  425. }
  427. private String getFacialHair(FacialHair facialHair) {
  428. return (facialHair.moustache + facialHair.beard + facialHair.sideburns > 0) ? "Yes" : "No";
  429. }
  431. private String getEmotion(Emotion emotion)
  432. {
  433. String emotionType = "";
  434. double emotionValue = 0.0;
  435. if (emotion.anger > emotionValue)
  436. {
  437. emotionValue = emotion.anger;
  438. emotionType = "Anger";
  439. }
  440. if (emotion.contempt > emotionValue)
  441. {
  442. emotionValue = emotion.contempt;
  443. emotionType = "Contempt";
  444. }
  445. if (emotion.disgust > emotionValue)
  446. {
  447. emotionValue = emotion.disgust;
  448. emotionType = "Disgust";
  449. }
  450. if (emotion.fear > emotionValue)
  451. {
  452. emotionValue = emotion.fear;
  453. emotionType = "Fear";
  454. }
  455. if (emotion.happiness > emotionValue)
  456. {
  457. emotionValue = emotion.happiness;
  458. emotionType = "Happiness";
  459. }
  460. if (emotion.neutral > emotionValue)
  461. {
  462. emotionValue = emotion.neutral;
  463. emotionType = "Neutral";
  464. }
  465. if (emotion.sadness > emotionValue)
  466. {
  467. emotionValue = emotion.sadness;
  468. emotionType = "Sadness";
  469. }
  470. if (emotion.surprise > emotionValue)
  471. {
  472. emotionValue = emotion.surprise;
  473. emotionType = "Surprise";
  474. }
  475. return String.format("%s: %f", emotionType, emotionValue);
  476. }
  478. private String getHeadPose(HeadPose headPose)
  479. {
  480. return String.format("Pitch: %s, Roll: %s, Yaw: %s", headPose.pitch, headPose.roll, headPose.yaw);
  481. }
  482. }
  483. }
Select_image_Activity.java code
  1. package ganeshannt.faceapi.ui;
  2. import android.content.Intent;
  3. import android.net.Uri;
  4. import android.os.Bundle;
  5. import android.os.Environment;
  6. import android.provider.MediaStore;
  7. import android.support.annotation.NonNull;
  8. import android.support.v7.app.AppCompatActivity;
  9. import android.view.View;
  10. import android.widget.TextView;
  12. import java.io.File;
  13. import java.io.IOException;
  15. import ganeshannt.faceapi.R;
  17. // The activity for the user to select a image and to detect faces in the image.
  18. public class SelectImageActivity extends AppCompatActivity {
  19. // Flag to indicate the request of the next task to be performed
  20. private static final int REQUEST_TAKE_PHOTO = 0;
  21. private static final int REQUEST_SELECT_IMAGE_IN_ALBUM = 1;
  23. // The URI of photo taken with camera
  24. private Uri mUriPhotoTaken;
  26. // When the activity is created, set all the member variables to initial state.
  27. @Override
  28. protected void onCreate(Bundle savedInstanceState) {
  29. super.onCreate(savedInstanceState);
  30. setContentView(R.layout.activity_select_image);
  31. }
  33. // Save the activity state when it's going to stop.
  34. @Override
  35. protected void onSaveInstanceState(Bundle outState) {
  36. super.onSaveInstanceState(outState);
  37. outState.putParcelable("ImageUri", mUriPhotoTaken);
  38. }
  40. // Recover the saved state when the activity is recreated.
  41. @Override
  42. protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) {
  43. super.onRestoreInstanceState(savedInstanceState);
  44. mUriPhotoTaken = savedInstanceState.getParcelable("ImageUri");
  45. }
  47. // Deal with the result of selection of the photos and faces.
  48. @Override
  49. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  50. switch (requestCode)
  51. {
  52. case REQUEST_TAKE_PHOTO:
  53. case REQUEST_SELECT_IMAGE_IN_ALBUM:
  54. if (resultCode == RESULT_OK) {
  55. Uri imageUri;
  56. if (data == null || data.getData() == null) {
  57. imageUri = mUriPhotoTaken;
  58. } else {
  59. imageUri = data.getData();
  60. }
  61. Intent intent = new Intent();
  62. intent.setData(imageUri);
  63. setResult(RESULT_OK, intent);
  64. finish();
  65. }
  66. break;
  67. default:
  68. break;
  69. }
  70. }
  72. // When the button of "Take a Photo with Camera" is pressed.
  73. public void takePhoto(View view) {
  74. Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  75. if(intent.resolveActivity(getPackageManager()) != null) {
  76. // Save the photo taken to a temporary file.
  77. File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
  78. try {
  79. File file = File.createTempFile("IMG_", ".jpg", storageDir);
  80. mUriPhotoTaken = Uri.fromFile(file);
  81. intent.putExtra(MediaStore.EXTRA_OUTPUT, mUriPhotoTaken);
  82. startActivityForResult(intent, REQUEST_TAKE_PHOTO);
  83. } catch (IOException e) {
  84. setInfo(e.getMessage());
  85. }
  86. }
  87. }
  89. // When the button of "Select a Photo in Album" is pressed.
  90. public void selectImageInAlbum(View view) {
  91. Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
  92. intent.setType("image/*");
  93. if (intent.resolveActivity(getPackageManager()) != null) {
  94. startActivityForResult(intent, REQUEST_SELECT_IMAGE_IN_ALBUM);
  95. }
  96. }
  98. // Set the information panel on screen.
  99. private void setInfo(String info) {
  100. TextView textView = (TextView) findViewById(R.id.info);
  101. textView.setText(info);
  102. }
  103. }
MainActivity.java code
  1. package ganeshannt.faceapi.ui;
  3. import android.app.AlertDialog;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.support.v7.app.AppCompatActivity;
  7. import android.view.View;
  9. import ganeshannt.faceapi.R;
  11. public class MainActivity extends AppCompatActivity {
  12. @Override
  13. protected void onCreate(Bundle savedInstanceState) {
  14. super.onCreate(savedInstanceState);
  15. setContentView(R.layout.activity_main);
  17. if (getString(R.string.subscription_key).startsWith("Please")) {
  18. new AlertDialog.Builder(this)
  19. .setTitle(getString(R.string.add_subscription_key_tip_title))
  20. .setMessage(getString(R.string.add_subscription_key_tip))
  21. .setCancelable(false)
  22. .show();
  23. }
  24. }
  26. public void detection(View view) {
  27. Intent intent = new Intent(this, DetectionActivity.class);
  28. startActivity(intent);
  29. }
  31. }
Step 10
Click the "Make Project" option and run.
Deliverables
Here, we have successfully detected the face using Face API in the Android app.
Android
Android
Android
Android
Android
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