Added a Gradle example

Author: yushulx

examples/9.x/gradle_kotlin/README.md

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+# Gradle Project Example: Java & Kotlin Barcode Reader
+This sample demonstrates how to use Gradle to build and run a simple command-line barcode reader written in Java or Kotlin.
+
+## License Key
+Get a [30-day FREE trial license](https://www.dynamsoft.com/customer/license/trialLicense/).
+
+## Java Barcode SDK Documentation
+
+For comprehensive documentation, visit the [Java Barcode SDK](https://www.dynamsoft.com/barcode-reader/docs/server/programming/java/) page.
+
+## Usage
+To build and run the barcode reader, use the following command:
+
+```bash
+./gradlew run --args="<image file> <license file>"
+```

examples/9.x/gradle_kotlin/images/EAN-8.jpg

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+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+

examples/9.x/gradle_kotlin/images/PDF417.png

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+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

examples/9.x/gradle_kotlin/images/UPC-E.jpg

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+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/6.8.3/userguide/building_java_projects.html
+ */
+
+plugins {
+    // Apply the application plugin to add support for building a CLI application in Java.
+    id 'application'
+}
+
+repositories {
+    // Use JCenter for resolving dependencies.
+    jcenter()
+    maven {
+        url "http://download2.dynamsoft.com/maven/dbr/jar"
+    }
+}
+
+dependencies {
+    // Use JUnit test framework.
+    testImplementation 'junit:junit:4.13'
+
+    // This dependency is used by the application.
+    implementation 'com.google.guava:guava:29.0-jre'
+
+    // Dynamsoft Barcode Reader SDK
+    implementation 'com.dynamsoft:dbr:9.6.40.1'
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = 'dynamsoft.barcode.reader.App'
+}

examples/9.x/gradle_kotlin/images/multi-qr.jpg

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package dynamsoft.barcode.reader;
+
+import com.dynamsoft.dbr.*;
+
+import java.nio.file.*; 
+
+public class App {
+
+    private BarcodeReader mBarcodeReader;
+
+    public App(String license) {
+        try {
+            mBarcodeReader = new BarcodeReader(license);
+        } catch (Exception e) {
+            //TODO: handle exception
+            e.printStackTrace();
+        }
+        
+    }
+
+    public BarcodeReader getBarcodeReader() {
+        return mBarcodeReader;
+    }
+
+    public String getGreeting() {
+        return "Hello Dynamsoft Barcode Reader!";
+    }
+
+    public TextResult[] decodeFile(String file) {
+        TextResult[] results = null;
+        // Read barcode           
+        try {
+            //Best coverage settings
+            // br.initRuntimeSettingsWithString("{\"ImageParameter\":{\"Name\":\"BestCoverage\",\"DeblurLevel\":9,\"ExpectedBarcodesCount\":512,\"ScaleDownThreshold\":100000,\"LocalizationModes\":[{\"Mode\":\"LM_CONNECTED_BLOCKS\"},{\"Mode\":\"LM_SCAN_DIRECTLY\"},{\"Mode\":\"LM_STATISTICS\"},{\"Mode\":\"LM_LINES\"},{\"Mode\":\"LM_STATISTICS_MARKS\"}],\"GrayscaleTransformationModes\":[{\"Mode\":\"GTM_ORIGINAL\"},{\"Mode\":\"GTM_INVERTED\"}]}}", EnumConflictMode.CM_OVERWRITE);
+            //Best speed settings
+            //br.initRuntimeSettingsWithString("{\"ImageParameter\":{\"Name\":\"BestSpeed\",\"DeblurLevel\":3,\"ExpectedBarcodesCount\":512,\"LocalizationModes\":[{\"Mode\":\"LM_SCAN_DIRECTLY\"}],\"TextFilterModes\":[{\"MinImageDimension\":262144,\"Mode\":\"TFM_GENERAL_CONTOUR\"}]}}",EnumConflictMode.CM_OVERWRITE);
+            //Balance settings
+            mBarcodeReader.initRuntimeSettingsWithString("{\"ImageParameter\":{\"Name\":\"Balance\",\"DeblurLevel\":5,\"ExpectedBarcodesCount\":512,\"LocalizationModes\":[{\"Mode\":\"LM_CONNECTED_BLOCKS\"},{\"Mode\":\"LM_STATISTICS\"}]}}",EnumConflictMode.CM_OVERWRITE);
+            long start = System.currentTimeMillis();
+            results = mBarcodeReader.decodeFile(file, "");
+            long end = System.currentTimeMillis();
+
+            if (results == null || results.length == 0) {
+                System.out.println(String.format("No barcode found. Total time cost: %d ms.", (end - start)));
+            } else {
+                System.out.println(String.format("Total barcode(s) found: %d. Total time cost: %d ms.", results.length, (end -start)));
+                int index = 0;
+                for (TextResult result : results) {
+                    System.out.println(String.format("  Barcode %d:", index++));
+                    if(result.barcodeFormat != 0){
+                        System.out.println("    Type: " + result.barcodeFormatString);
+                    } else {
+                        System.out.println("    Type: " + result.barcodeFormatString_2);
+                    }
+                    
+                    System.out.println("    Value: " + result.barcodeText);
+
+                    System.out.println(String.format("    Region points: {(%d,%d),(%d,%d),(%d,%d),(%d,%d)}",
+                    result.localizationResult.resultPoints[0].x, result.localizationResult.resultPoints[0].y,
+                    result.localizationResult.resultPoints[1].x,result.localizationResult.resultPoints[1].y,
+                    result.localizationResult.resultPoints[2].x,result.localizationResult.resultPoints[2].y,
+                    result.localizationResult.resultPoints[3].x,result.localizationResult.resultPoints[3].y));
+                }
+            }
+        } catch (BarcodeReaderException e) {
+            e.printStackTrace();
+        }
+        
+        return results;
+    }
+
+    public static void main(String[] args) throws Exception {
+        
+        System.out.println("Working Directory = " + System.getProperty("user.dir"));
+
+        if (args.length == 0) {
+            String newLine = System.getProperty("line.separator");
+            String s = new StringBuilder()
+            .append("Usage:")
+            .append(newLine)
+            .append("    ./gradlew run --args=\"<image file> <license file>\"").append(newLine)
+            .toString();
+
+            System.out.println(s);
+            return;
+        }
+
+        String file = args[0];
+        String license = "DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ==";
+
+        if (args.length == 2) {
+            
+            license = new String(Files.readAllBytes(Paths.get(args[1]))); 
+        }
+        App app = new App(license);
+        System.out.println(app.getGreeting());
+        app.decodeFile(file);
+
+    }
+}
+

examples/9.x/gradle_kotlin/java/.gitattributes

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package dynamsoft.barcode.reader;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class AppTest {
+    @Test public void testAppHasAGreeting() {
+        App classUnderTest = new App("");
+        assertNotNull("app should have a greeting", classUnderTest.getGreeting());
+    }
+
+    @Test public void testAppHasABarcodeReader() {
+        App classUnderTest = new App("");
+        assertNotNull("app should have a barcode reader instance", classUnderTest.getBarcodeReader());
+    }
+}