Android Tutorial Inline Java Code

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Dim NativeMe As JavaObject
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
    NativeMe.InitializeContext  
    NativeMe.Runmethod("methodName",Array("String1","String2"))
   
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

#If java

public void methodName(String s1,String s2){
    BA.Log(s1 + " " + s2);
}
#End If

#If JAVA
import java.lang.Math;
import java.lang.Float;
public class AquaLib {
    public Float one(Float kh,Float co) {
    float x = (float) Math.round((7.90+Math.log(kh/(2.8*co))/Math.log(10))*100)/100;
    return x;
    }
    public Float two(Float kh,Float co) {
    float x = (float) Math.round((7.90+Math.log(kh/(2.8*co))/Math.log(10))*100)/100;
    return x;
    }   
    public Float tree(Float kh,Float co) {
    float x = (float) Math.round((7.90+Math.log(kh/(2.8*co))/Math.log(10))*100)/100;
    return x;
    }   
    public Float four(Float kh,Float co) {
    float x = (float) Math.round((7.90+Math.log(kh/(2.8*co))/Math.log(10))*100)/100;
    return x;
    }   
}
#end if

NativeMe.InitializeStatic("AquaLib")
Dim s As Float =  NativeMe.RunMethod("one",Array As Object(kh,co))

Sub Process_Globals
    Private nativeMe As JavaObject
End Sub
Sub Service_Create
    nativeMe.InitializeContext
End Sub

Sub Service_Start (StartingIntent As Intent)
    Dim l As Long
    l = nativeMe.RunMethod("FreeSpace", Array(File.DirRootExternal))
    Log("l = " & l)

End Sub

#If JAVA
import java.io.File;
import android.content.Context;

public long FreeSpace(String Pathf) {
      File f = null;
      long v;
      boolean bool = false;
     
      try{
         // create new file
         f = new File(Pathf);
        
         // get number of unallocated bytes
         v = f.getFreeSpace();
        
         // true if the file path exists
         bool = f.exists();
        
         // if file exists
         if(bool)
         {
            // prints
            return v;
         }
         else
        {
         return 0;
         }
      }catch(Exception e){
         // if any error occurs       
       return 0;
     
      }
}

#End If

** Service (serverservice) Create **


Error occurred on line: 40 (serverservice)
java.lang.NoSuchFieldException: context


    at java.lang.ClassCache.findFieldByName(ClassCache.java:446)
    at java.lang.Class.getDeclaredField(Class.java:666)
    at anywheresoftware.b4j.object.JavaObject.InitializeContext(JavaObject.java:64)
    at mlc.wifitransfer.serverservice._service_create(serverservice.java:6308)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:636)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:302)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:238)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:121)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:171)
    at mlc.wifitransfer.serverservice.onCreate(serverservice.java:48)
    at android.app.ActivityThread.handleCreateService(ActivityThread.java:1949)
    at android.app.ActivityThread.access$2500(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:989)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3691)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)
    at dalvik.system.NativeStart.main(Native Method)
** Service (serverservice) Start **