Dodaj activity obsługujące przypadki, w których kod nie został znaleziony wraz z podstawowym interfejsem; dodaj podstawowy preprocessing zrobionego zdjęcia za pomocą OpenCV; dodaj zakończenia działania activity w kilku miejscach

Lookify/app/src/main/AndroidManifest.xml

@@ -12,6 +12,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity android:name=".DecodeFail"></activity>
         <activity android:name=".Decode" />
         <activity android:name=".TakePhoto" />
         <activity android:name=".Help" />

Lookify/app/src/main/java/com/example/lookifyv2/Decode.java

@@ -1,5 +1,6 @@
 package com.example.lookifyv2;
 
+import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.util.Log;
@@ -23,11 +24,15 @@ import org.opencv.android.OpenCVLoader;
 import org.opencv.android.Utils;
 import org.opencv.core.Mat;
 import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
 
 import java.util.ArrayList;
 import java.util.Hashtable;
 import java.util.List;
 
+import static org.opencv.imgproc.Imgproc.ADAPTIVE_THRESH_MEAN_C;
+import static org.opencv.imgproc.Imgproc.THRESH_BINARY;
+
 public class Decode extends AppCompatActivity {
 
     //inicjacja logów OpenCV
@@ -35,6 +40,9 @@ public class Decode extends AppCompatActivity {
 
     String filePath;
     Mat matPic;
+    Mat matPicG;
+    Mat matPicGB;
+    Mat matPicGBT;
 
     //OpenCV domyślnie uruchamia się po onCreate co powoduje problemy - zapobiegamy więc temu
     private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@@ -65,10 +73,22 @@ public class Decode extends AppCompatActivity {
         Bundle extras = getIntent().getExtras();
         filePath = extras.getString("takenPic");
         matPic = Imgcodecs.imread(filePath);
+        Mat matPicG = new Mat();
+        Mat matPicGB = new Mat();
+        Mat matPicGBT = new Mat();
 
-        String contents = null;
+        //Zdjęcie zamieniane jest na czarno-biały odpowiednik
-        Bitmap bMap = Bitmap.createBitmap(matPic.width(), matPic.height(), Bitmap.Config.ARGB_8888);
+        Imgproc.cvtColor(matPic, matPicG, Imgproc.COLOR_RGB2GRAY);
-        Utils.matToBitmap(matPic, bMap);
+
+        //Usuwanie "noise'u" przy jednoczesnym zachowywaniu ostrych krawędzi za pomocą bilateralnego filtru
+        Imgproc.bilateralFilter(matPicG, matPicGB, 5, 75, 75);
+
+        //Zwiększanie kontrastu za pomocą thresholdu(wartości adaptywnego zaczerpnięte z https://stackoverflow.com/questions/31289895/threshold-image-using-opencv-java)
+        //Imgproc.adaptiveThreshold(matPicGB, matPicGBT, 255, ADAPTIVE_THRESH_MEAN_C, THRESH_BINARY, 15, 40);
+        Imgproc.threshold(matPicGB, matPicGBT, 100, 255, THRESH_BINARY);
+
+        Bitmap bMap = Bitmap.createBitmap(matPicGBT.width(), matPicGBT.height(), Bitmap.Config.ARGB_8888);
+        Utils.matToBitmap(matPicGBT, bMap);
         int[] intArray = new int[bMap.getWidth() * bMap.getHeight()];
 
         bMap.getPixels(intArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(), bMap.getHeight());
@@ -100,13 +120,16 @@ public class Decode extends AppCompatActivity {
 
         //Szukanie kodu na wczytanym zdjęciu
         MultiFormatReader reader = new MultiFormatReader();
+        String contents = null;
         try {
             Result result = reader.decode(bitmap, hints);
             contents = result.getText();
         } catch (NotFoundException e) {
             e.printStackTrace();
+            Intent intent_DecodeFail = new Intent(this, DecodeFail.class);
+            startActivity(intent_DecodeFail);
+            Decode.this.finish();
         }
-
         Toast toast = Toast.makeText(this, contents, Toast.LENGTH_LONG);
         toast.show();
     }

Lookify/app/src/main/java/com/example/lookifyv2/DecodeFail.java

@@ -0,0 +1,47 @@
+package com.example.lookifyv2;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+public class DecodeFail extends AppCompatActivity {
+
+    private Button button_tryagain;
+    private Button button_backtomain;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_decode_fail);
+
+        button_tryagain = findViewById(R.id.try_again_button);
+        button_backtomain = findViewById(R.id.backto_main_button);
+
+        button_tryagain.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openScan();
+            }
+        });
+        button_backtomain.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Finish();
+            }
+        });
+
+    }
+
+    public void Finish(){
+        finish();
+    }
+
+    public void openScan(){
+        Intent intent_Scan = new Intent(this, TakePhoto.class);
+        startActivity(intent_Scan);
+        finish();
+    }
+}

Lookify/app/src/main/res/layout/activity_decode.xml

@@ -6,4 +6,15 @@
     android:layout_height="match_parent"
     tools:context=".Decode">
 
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Please wait a second..."
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

Lookify/app/src/main/res/layout/activity_decode_fail.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".DecodeFail">
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:text="Whoops! Barcode could not be found!"
+        app:layout_constraintBottom_toTopOf="@+id/try_again_button"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="1.0" />
+
+    <Button
+        android:id="@+id/try_again_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Try again"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/backto_main_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="Return to menu"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/try_again_button"
+        app:layout_constraintVertical_bias="0.0" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>