add_back_button.diff

diff --git a/ocr/src/main/java/com/pcl/ocr/ui/LPRActivity.java b/ocr/src/main/java/com/pcl/ocr/ui/LPRActivity.java
index 6a4b517..c828abd 100644
--- a/ocr/src/main/java/com/pcl/ocr/ui/LPRActivity.java
+++ b/ocr/src/main/java/com/pcl/ocr/ui/LPRActivity.java
@@ -16,10 +16,14 @@ import org.opencv.android.BaseLoaderCallback;
 import org.opencv.android.LoaderCallbackInterface;
 import org.opencv.android.OpenCVLoader;
 
+import android.view.View;
+import android.widget.Button;
+import android.view.View.OnClickListener;
+
 public class LPRActivity extends AppCompatActivity {
 
     private ScannerView scannerView;
-
+    private Button closeButton;
     public static final int REQUEST_LPR_CODE = 1001;
 
     @Override
@@ -27,6 +31,14 @@ public class LPRActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_lpr);
         scannerView = findViewById(R.id.scanner_view);
+				this.closeButton = (Button)this.findViewById(R.id.close);
+				this.closeButton.setOnClickListener(new OnClickListener() {
+					@Override
+					public void onClick(View v) {
+						finish();
+					}
+				});
+        
         startCamera();
     }
 
@@ -86,4 +98,4 @@ public class LPRActivity extends AppCompatActivity {
             }
         }
     };
-}
\ No newline at end of file
+}
diff --git a/ocr/src/main/res/layout/activity_lpr.xml b/ocr/src/main/res/layout/activity_lpr.xml
index fa1f6dc..236b531 100644
--- a/ocr/src/main/res/layout/activity_lpr.xml
+++ b/ocr/src/main/res/layout/activity_lpr.xml
@@ -8,4 +8,9 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
-</RelativeLayout>
\ No newline at end of file
+    <Button android:id="@+id/close"
+          android:layout_width="fill_parent"
+          android:layout_height="wrap_content"
+          android:layout_alignParentBottom="true"
+          android:text="Back" />
+</RelativeLayout>