Add scanner demo files

app/src/main/java/net/foucry/pilldroid/CustomScannerActivity.java

@@ -0,0 +1,127 @@
+package net.foucry.pilldroid;
+
+import android.app.Activity;
+import android.content.pm.PackageManager;
+import android.graphics.Color;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.annotation.NonNull;
+
+import com.journeyapps.barcodescanner.CaptureManager;
+import com.journeyapps.barcodescanner.DecoratedBarcodeView;
+import com.journeyapps.barcodescanner.ViewfinderView;
+
+import java.util.Random;
+
+/**
+ * Custom Scanner Activity extending from Activity to display a custom layout form scanner view.
+ */
+public class CustomScannerActivity extends Activity implements
+        DecoratedBarcodeView.TorchListener {
+
+    private CaptureManager capture;
+    private DecoratedBarcodeView barcodeScannerView;
+    private Button switchFlashlightButton;
+    private ViewfinderView viewfinderView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_custom_scanner);
+
+        barcodeScannerView = findViewById(R.id.zxing_barcode_scanner);
+        barcodeScannerView.setTorchListener(this);
+
+        switchFlashlightButton = findViewById(R.id.switch_flashlight);
+
+        viewfinderView = findViewById(R.id.zxing_viewfinder_view);
+
+        // if the device does not have flashlight in its camera,
+        // then remove the switch flashlight button...
+        if (!hasFlash()) {
+            switchFlashlightButton.setVisibility(View.GONE);
+        }
+
+        capture = new CaptureManager(this, barcodeScannerView);
+        capture.initializeFromIntent(getIntent(), savedInstanceState);
+        capture.setShowMissingCameraPermissionDialog(false);
+        capture.decode();
+
+        changeMaskColor(null);
+        changeLaserVisibility(true);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        capture.onResume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        capture.onPause();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        capture.onDestroy();
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        capture.onSaveInstanceState(outState);
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        return barcodeScannerView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
+    }
+
+    /**
+     * Check if the device's camera has a Flashlight.
+     * @return true if there is Flashlight, otherwise false.
+     */
+    private boolean hasFlash() {
+        return getApplicationContext().getPackageManager()
+                .hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
+    }
+
+    public void switchFlashlight(View view) {
+        if (getString(R.string.turn_on_flashlight).contentEquals(switchFlashlightButton.getText())) {
+            barcodeScannerView.setTorchOn();
+        } else {
+            barcodeScannerView.setTorchOff();
+        }
+    }
+
+    public void changeMaskColor(View view) {
+        Random rnd = new Random();
+        int color = Color.argb(100, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
+        viewfinderView.setMaskColor(color);
+    }
+
+    public void changeLaserVisibility(boolean visible) {
+        viewfinderView.setLaserVisibility(visible);
+    }
+
+    @Override
+    public void onTorchOn() {
+        switchFlashlightButton.setText(R.string.turn_off_flashlight);
+    }
+
+    @Override
+    public void onTorchOff() {
+        switchFlashlightButton.setText(R.string.turn_on_flashlight);
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        capture.onRequestPermissionsResult(requestCode, permissions, grantResults);
+    }
+}

app/src/main/res/layout/activity_custom_scanner.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="example.zxing.CustomScannerActivity">
+
+    <com.journeyapps.barcodescanner.DecoratedBarcodeView
+        android:id="@+id/zxing_barcode_scanner"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:zxing_scanner_layout="@layout/custom_barcode_scanner">
+    </com.journeyapps.barcodescanner.DecoratedBarcodeView>
+
+    <Button
+        android:id="@+id/switch_flashlight"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/turn_on_flashlight"
+        android:layout_alignParentTop="true"
+        android:layout_centerHorizontal="true"
+        android:onClick="switchFlashlight"/>
+
+</RelativeLayout>