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

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.");
+        }
+    }
 }