Moving to newer SDK and build framework.

app/build.gradle

@@ -1,4 +1,6 @@
-apply plugin: 'com.android.application'
+plugins {
+    id 'com.android.application'
+}
 
 //
 //	Creates version.xml	
@@ -35,64 +37,48 @@ preBuild.dependsOn createVersionXML
 //
 //	Convert SVG images from art directory into PNG files.
 //
-task generateDrawablesFromArt {
-	doLast {
-		def buildDir = (new File(project.buildDir,'art')).toString()
-        def p = ('make -C app/src/main/art RES=../res TMP='+buildDir).execute()
-		p.consumeProcessOutput()
-		p.waitFor()
-		if ( p.exitValue() )
-			throw new GradleException("Generation of art failed.")
-	}
-}
-preBuild.dependsOn generateDrawablesFromArt
+//task generateDrawablesFromArt {
+//	doLast {
+//		def buildDir = (new File(project.buildDir,'art')).toString()
+//        def p = ('make -C app/src/main/art RES=../res TMP='+buildDir).execute()
+//		p.consumeProcessOutput()
+//		p.waitFor()
+//		if ( p.exitValue() )
+//			throw new GradleException("Generation of art failed.")
+//	}
+//}
+//preBuild.dependsOn generateDrawablesFromArt
 
 android {
-    compileSdkVersion 10
-    buildToolsVersion "21.1.1"
+    compileSdk 31
 
     defaultConfig {
-        applicationId "org.vostan.sokoban"
-        minSdkVersion 10
-        targetSdkVersion 14
+        applicationId "org.vostan.banvor"
+        minSdk 21
+        targetSdk 31
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
-    apply from: new File(getRootDir(),'/.secret.gradle')
+
     buildTypes {
         release {
-            runProguard true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-project.txt'
-            signingConfig signingConfigs.sokoban_release
-        }
-
-        debug {
-            applicationIdSuffix ".debug"
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
-
-    sourceSets {
-        /*
-        main {
-            java.srcDirs = ['src']
-
-            resources.srcDirs = ['src']
-            aidl.srcDirs = ['src']
-
-            renderscript.srcDirs = ['src']
-
-            res.srcDirs = ['res']
-            assets.srcDirs = ['assets']
-
-        }
-        */
-        debug {
-            main.manifest.srcFile "src/main/AndroidManifest-debug.xml"
-        }
-        androidTest.setRoot("src/tests")
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
-//repositories {}
-
 dependencies {
-    compile 'com.android.support:support-v4:18.0.0'
+
+    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation 'com.google.android.material:material:1.4.0'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 }