add Add parameters to adjust the scan area position

android/build.gradle

@@ -9,7 +9,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:3.5.2'
     }
 }
 
@@ -38,8 +38,8 @@ android {
 
 dependencies {
     implementation('com.journeyapps:zxing-android-embedded:4.3.0') { transitive = false }
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'com.google.zxing:core:3.3.0'
+    implementation 'androidx.appcompat:appcompat:1.4.2'
+    implementation 'com.google.zxing:core:3.5.0'
 //    implementation 'com.huawei.hms:scanplus:1.3.1.300'
     implementation 'com.huawei.hms:scanplus:2.1.0.300'
 }

android/src/main/java/com/chavesgu/scan/ScanDrawView.java

@@ -18,8 +18,11 @@
 import android.util.Log;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
+import android.view.ViewGroup;
 import android.view.animation.LinearInterpolator;
+import android.widget.RelativeLayout;
 
+import java.math.BigDecimal;
 import java.util.Map;
 
 import androidx.annotation.Nullable;
@@ -39,6 +42,7 @@ public class ScanDrawView extends SurfaceView implements SurfaceHolder.Callback
     private int scanLineColor;
     private boolean transparentScanLine = false;
     private double scale = .7;
+    private float up = 80.0f;
     private float dpi;
     private boolean running;
 
@@ -54,6 +58,8 @@ public ScanDrawView(Context context, Activity activity, @Nullable Map<String, Ob
         final int g = (int) args.get("g");
         final int b = (int) args.get("b");
         final double alpha = (double) args.get("a");
+        up = BigDecimal.valueOf((double) args.get("up")).floatValue();
+        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
         final int a = max(0, min(255, (int)floor(alpha * 256.0)));
         if (a==0) transparentScanLine = true;
         scanLineColor = Color.argb(a, r, g, b);
@@ -75,8 +81,8 @@ public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int width, int he
         vw = width;
         vh = height;
         areaWidth = min(vw, vh) * scale;
-        areaX = (vw - areaWidth) / 2;
-        areaY = (vh - areaWidth) / 2;
+        areaX = (vw - areaWidth) / 2 ;
+        areaY = (vh - areaWidth) / 2 ;
 
         DisplayMetrics dm = new DisplayMetrics();
         activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
@@ -128,12 +134,12 @@ private void tryDraw(final SurfaceHolder holder) {
 
     private void drawing(Canvas canvas) {
         final float x = (float) areaX;
-        final float y = (float) areaY;
+        final float y = (float) areaY - up;
         final float width = (float) areaWidth;
         final float shortWidth = (float) (areaWidth * 0.1);
         final float scanLineWidth = (float) (areaWidth * 0.8);
         final float scanLineX = (float) (vw - scanLineWidth)/2;
-        final float scanLineY = (float) (vh - scanLineWidth)/2;
+        final float scanLineY = (float) (vh - scanLineWidth)/2 - up;
 
         if (scale < 1) {
             Paint paint = new Paint();

android/src/main/java/com/chavesgu/scan/ScanPlatformView.java

@@ -7,6 +7,7 @@
 import android.util.Log;
 import android.view.View;
 
+import java.math.BigDecimal;
 import java.util.Map;
 
 import androidx.annotation.NonNull;
@@ -44,7 +45,6 @@ private void initForBinding(Map<String, Object> args) {
         this.scanViewNew.setCaptureListener(this);
 
         this.scanDrawView = new ScanDrawView(context, activity, args);
-
         this.parentView = new ParentView(context);
         this.parentView.addView(this.scanViewNew);
         this.parentView.addView(this.scanDrawView);

android/src/main/java/com/chavesgu/scan/ScanViewFactory.java

@@ -16,21 +16,20 @@
 
 public class ScanViewFactory extends PlatformViewFactory {
     @NonNull private final BinaryMessenger messenger;
-    @NonNull private final Context context;
     @NonNull private final Activity activity;
-    private ActivityPluginBinding activityPluginBinding;
+    private final ActivityPluginBinding activityPluginBinding;
 
     ScanViewFactory(@NonNull BinaryMessenger messenger, @NonNull Context context, @NonNull Activity activity, @NonNull ActivityPluginBinding activityPluginBinding) {
         super(StandardMessageCodec.INSTANCE);
         this.messenger = messenger;
-        this.context = context;
         this.activity = activity;
         this.activityPluginBinding = activityPluginBinding;
     }
 
+    @NonNull
     @Override
     public PlatformView create(Context context, int viewId, Object args) {
         final Map<String, Object> creationParams = (Map<String, Object>) args;
-        return new ScanPlatformView(messenger, this.context, this.activity, this.activityPluginBinding, viewId, creationParams);
+        return new ScanPlatformView(messenger, context, this.activity, this.activityPluginBinding, viewId, creationParams);
     }
 }

android/src/main/java/com/chavesgu/scan/ScanViewNew.java

@@ -93,6 +93,7 @@ public void barcodeResult(BarcodeResult result) {
                         myVib.vibrate(50);
                     }
                 }
+
             }
         });
         _resume();