fixed bugs, added progress saving, setted MIN API to 19

proj.android-studio/app/build.gradle

@@ -6,18 +6,14 @@ android {
     buildToolsVersion "28.0.0"
     defaultConfig {
         applicationId "fishrungames.DoubleHitBalls"
-        minSdkVersion 24
+        minSdkVersion 19
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {
-
-                abiFilters  "armeabi-v7a", "x86"
-
-                arguments "-DANDROID_STL=c++_shared"
-
+                abiFilters 'arm64-v8a', 'armeabi-v7a', 'x86'
                 cppFlags "-std=c++17 -frtti -fexceptions -fsigned-char -Wno-c++11-narrowing"
             }
         }
@@ -38,6 +34,13 @@ android {
             assets.srcDirs = ['../../assets/']
         }
     }
+    splits {
+        abi {
+            enable true
+            reset()
+            include 'arm64-v8a', 'armeabi-v7a', 'x86'
+        }
+    }
 }
 
 dependencies {

proj.android-studio/app/src/main/java/fishrungames/doublehitballs/GL2JNIActivity.java

@@ -36,6 +36,8 @@ public class GL2JNIActivity extends Activity
 		EngineWrapper.LoadSalmonEngineLibrary();
 		EngineWrapper.SetActivityInstance(this);
 		EngineWrapper.SetupEnviroment();
+		JniWrapper.SetJavaVM();
+		JniWrapper.SetContext(this);
 		
 		String apkFilePath = null;
 		ApplicationInfo appInfo = null;

proj.android-studio/app/src/main/java/fishrungames/doublehitballs/JniWrapper.java

@@ -1,11 +1,52 @@
 package fishrungames.doublehitballs;
 
+import android.content.Context;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+
 public class JniWrapper
 {
+    static Context context = null;
+
+    public static void SetContext(Context context)
+    {
+        JniWrapper.context = context;
+    }
+
     static {
         System.loadLibrary("DoubleHitBalls");
     }
 
     public static native void Init(int width, int height);
+    public static native void SetJavaVM();
 
+    public static String LoadFile(String fileName)
+    {
+        try {
+            File file = new File(context.getFilesDir(), fileName);
+            FileInputStream inputStream = new FileInputStream(file);
+            byte[] data = new byte[(int) file.length()];
+            inputStream.read(data);
+            inputStream.close();
+            return new String(data, "UTF-8");
+        } catch (Exception e) {
+            Log.d("SaveFile", "Failed to save a file.");
+        }
+        return "";
+    }
+
+    public static void SaveFile(String fileName, String fileContent)
+    {
+        try {
+            File file = new File(context.getFilesDir(), fileName);
+            FileOutputStream outputStream = new FileOutputStream(file);
+            outputStream.write(fileContent.getBytes());
+            outputStream.close();
+        } catch (Exception e) {
+            Log.d("SaveFile", "Failed to save a file.");
+        }
+    }
 }