Allow possibility to open the front camera

SampleApp/src/main/java/io/card/development/SampleActivity.java

@@ -56,6 +56,7 @@ public class SampleActivity extends Activity {
     private CheckBox mUseCardIOLogoToggle;
     private CheckBox mShowPayPalActionBarIconToggle;
     private CheckBox mKeepApplicationThemeToggle;
+    private CheckBox mFontCameraToggle;
     private Spinner mLanguageSpinner;
     private EditText mUnblurEdit;
 
@@ -79,6 +80,8 @@ public void onCreate(Bundle savedInstanceState) {
         mShowPayPalActionBarIconToggle = (CheckBox) findViewById(R.id.show_paypal_action_bar_icon);
         mKeepApplicationThemeToggle = (CheckBox) findViewById(R.id.keep_application_theme);
 
+        mFontCameraToggle = (CheckBox) findViewById(R.id.front_camera);
+
         mLanguageSpinner = (Spinner) findViewById(R.id.language);
         mUnblurEdit = (EditText) findViewById(R.id.unblur);
 
@@ -116,6 +119,7 @@ public void onScan(View pressed) {
                 .putExtra(CardIOActivity.EXTRA_LANGUAGE_OR_LOCALE, (String) mLanguageSpinner.getSelectedItem())
                 .putExtra(CardIOActivity.EXTRA_USE_PAYPAL_ACTIONBAR_ICON, mShowPayPalActionBarIconToggle.isChecked())
                 .putExtra(CardIOActivity.EXTRA_KEEP_APPLICATION_THEME, mKeepApplicationThemeToggle.isChecked())
+                .putExtra(CardIOActivity.EXTRA_FRONT_CAMERA, mFontCameraToggle.isChecked())
                 .putExtra(CardIOActivity.EXTRA_GUIDE_COLOR, Color.GREEN)
                 .putExtra(CardIOActivity.EXTRA_SUPPRESS_CONFIRMATION, mSuppressConfirmationToggle.isChecked())
                 .putExtra(CardIOActivity.EXTRA_SUPPRESS_SCAN, mSuppressScanToggle.isChecked())

SampleApp/src/main/res/layout/sample_activity.xml

@@ -110,6 +110,12 @@
             android:layout_height="wrap_content"
             android:text="Keep application theme"/>
 
+        <CheckBox
+            android:id="@+id/front_camera"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Open front camera"/>
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"

card.io/src/main/java/io/card/payment/CardIOActivity.java

@@ -220,6 +220,12 @@ public final class CardIOActivity extends Activity {
      */
     public static final String EXTRA_KEEP_APPLICATION_THEME = "io.card.payment.keepApplicationTheme";
 
+    /**
+     * Boolean extra. Optional. If this value is set to <code>true</code>, the front camera will be opened.
+     * If this value is <code>false</code> (default), the back camera will be opened.
+     */
+    public static final String EXTRA_FRONT_CAMERA = "io.card.payment.frontCamera";
+
 
     /**
      * Boolean extra. Used for testing only.

card.io/src/main/java/io/card/payment/CardScanner.java

@@ -113,6 +113,8 @@ private native void nScanFrame(byte[] data, int frameWidth, int frameHeight, int
     private int numManualTorchChange;
     private int numFramesSkipped;
 
+    private boolean mFrontCamera = false;
+
     // ------------------------------------------------------------------------
     // STATIC INITIALIZATION
     // ------------------------------------------------------------------------
@@ -196,6 +198,7 @@ static boolean processorSupported() {
             mScanExpiry = scanIntent.getBooleanExtra(CardIOActivity.EXTRA_REQUIRE_EXPIRY, false)
                     && scanIntent.getBooleanExtra(CardIOActivity.EXTRA_SCAN_EXPIRY, true);
             mUnblurDigits = scanIntent.getIntExtra(CardIOActivity.EXTRA_UNBLUR_DIGITS, DEFAULT_UNBLUR_DIGITS);
+            mFrontCamera = scanIntent.getBooleanExtra(CardIOActivity.EXTRA_FRONT_CAMERA, false);
         }
         mScanActivityRef = new WeakReference<>(scanActivity);
         mFrameOrientation = currentFrameOrientation;
@@ -211,9 +214,11 @@ private Camera connectToCamera(int checkInterval, int maxTimeout) {
         if (useCamera) {
             do {
                 try {
-                    // Camera.open() will open the back-facing camera. Front cameras are not
-                    // attempted.
-                    return Camera.open();
+                    if (mFrontCamera) {
+                        return Util.openFrontCamera();
+                    } else {
+                        return Util.openBackCamera();
+                    }
                 } catch (RuntimeException e) {
                     try {
                         Log.w(Util.PUBLIC_LOG_TAG,

card.io/src/main/java/io/card/payment/Util.java

@@ -80,7 +80,8 @@ private static boolean hardwareSupportCheck() {
         // Camera needs to open
         Camera c = null;
         try {
-            c = Camera.open();
+            // For checking the hardware, we open the default camera: the back one.
+            c = openBackCamera();
         } catch (RuntimeException e) {
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 return true;
@@ -113,6 +114,38 @@ private static boolean hardwareSupportCheck() {
         return true;
     }
 
+    /**
+     * Open the back camera
+     * @return the back camera opened
+     */
+    static Camera openBackCamera() {
+        return Camera.open();
+    }
+
+    /**
+     * Open the front camera
+     * Inspired from https://stackoverflow.com/questions/2779002/how-do-i-open-the-front-camera-on-the-android-platform
+     * @return the front camera opened
+     */
+    static Camera openFrontCamera() {
+        int cameraCount = 0;
+        Camera cam = null;
+        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
+        cameraCount = Camera.getNumberOfCameras();
+        for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
+            Camera.getCameraInfo(camIdx, cameraInfo);
+            if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
+                try {
+                    cam = Camera.open(camIdx);
+                } catch (RuntimeException e) {
+                    Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());
+                }
+            }
+        }
+
+        return cam;
+    }
+
     public static String getNativeMemoryStats() {
         return "(free/alloc'd/total)" + Debug.getNativeHeapFreeSize() + "/"
                 + Debug.getNativeHeapAllocatedSize() + "/" + Debug.getNativeHeapSize();