Create leptonica module

.idea/gradle.xml

@@ -10,6 +10,7 @@
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/leptonica" />
             <option value="$PROJECT_DIR$/sample" />
             <option value="$PROJECT_DIR$/tesseract4android" />
           </set>

leptonica/.gitignore

@@ -0,0 +1 @@
+/build

leptonica/build.gradle

@@ -0,0 +1,46 @@
+plugins {
+	id 'com.android.library'
+}
+
+android {
+	namespace 'cz.adaptech.thirdparty.leptonica'
+	compileSdk 34
+
+	defaultConfig {
+		minSdk 16
+
+		testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+		consumerProguardFiles "consumer-rules.pro"
+		externalNativeBuild {
+			cmake {
+				cppFlags ''
+			}
+		}
+	}
+
+	buildTypes {
+		release {
+			minifyEnabled false
+			proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+		}
+	}
+	compileOptions {
+		sourceCompatibility JavaVersion.VERSION_1_8
+		targetCompatibility JavaVersion.VERSION_1_8
+	}
+	externalNativeBuild {
+		cmake {
+			path file('src/main/cpp/CMakeLists.txt')
+			version '3.22.1'
+		}
+	}
+}
+
+dependencies {
+
+	implementation 'androidx.appcompat:appcompat:1.6.1'
+	implementation 'com.google.android.material:material:1.11.0'
+	testImplementation 'junit:junit:4.13.2'
+	androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+	androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+}

leptonica/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

leptonica/src/androidTest/java/cz/adaptech/thirdparty/leptonica/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package cz.adaptech.thirdparty.leptonica;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+	@Test
+	public void useAppContext() {
+		// Context of the app under test.
+		Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+		assertEquals("cz.adaptech.thirdparty.leptonica.test", appContext.getPackageName());
+	}
+}

leptonica/src/main/AndroidManifest.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+</manifest>

leptonica/src/test/java/cz/adaptech/thirdparty/leptonica/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package cz.adaptech.thirdparty.leptonica;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+	@Test
+	public void addition_isCorrect() {
+		assertEquals(4, 2 + 2);
+	}
+}

settings.gradle

@@ -2,3 +2,4 @@ include ':tesseract4android'
 if (!System.env.JITPACK) {
     include ':sample'
 }
+include ':leptonica'