i have two classes which i am trying to pass my values in other class for insertion in db, through getters and setters i made but i get the the exception and my application crashes as soon as i click the Save button ..please somebody take a look on it its been three days i cant seem to solve it Thanks here are my both classes:
/**
 * Created by Sanya on 11/22/2015.
 */
                   public class User_overlay_save extends Activity implements View.OnClickListener
  {
    private static int RESULT_LOAD_IMAGE = 1;
    private static int RESULT_LOAD_VIDEO = 2;
    private int position = 0;
    private SQLiteDatabase db; DatabaseHelper helper;
    File myapp;
    private MediaController mediaControls;
    Button save_button;
    ImageButton vid_button,img_button;
    EditText  name_overlay;
   TextView real_Imgpath, real_Vidpath;
protected void onCreate(Bundle savedInstanceState){
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.user_overlay_save);
    save_button=(Button)findViewById(R.id.save_Ouser);
    img_button=(ImageButton)findViewById(R.id.img_button);
    vid_button=(ImageButton)findViewById(R.id.vid_button);
    real_Imgpath =(TextView)findViewById(R.id.real_Imgpath);
    real_Vidpath =(TextView)findViewById(R.id.real_Vidpath);
    name_overlay=(EditText)findViewById(R.id.name_overlay);
    save_button.setOnClickListener(this);
    img_button.setOnClickListener(this);
    vid_button.setOnClickListener(this);
    name_overlay.setOnClickListener(this);
        }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.save_Ouser:
            {
               boolean result= helper.Insert();
                if(result==true)
                {
                    Toast.makeText(getApplicationContext(), "saved..in DB..!!!",
                            Toast.LENGTH_LONG).show();
                }
else
                {
                    Toast.makeText(getApplicationContext(), "ERROR--the path could not b saved..!!",
                            Toast.LENGTH_LONG).show();
                }
            }
            break;
            case R.id.img_button:
                Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
               startActivityForResult(i, RESULT_LOAD_IMAGE);
                break;
            case R.id.vid_button:
                Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, RESULT_LOAD_VIDEO);
                break;
        }
    }
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            String realPath;
//FOR IMAGE PATH SAVING
        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
            String selectedImagePath;
            Uri selectedImageUri = data.getData();
//MEDIA GALLERY
     selectedImagePath =       ImageFilePath.getPath(getApplicationContext(), selectedImageUri);
        Log.i("Image-->File Path-->", " " + selectedImagePath);
        setImgTextViews(Build.VERSION.SDK_INT, selectedImagePath);
        SET_saveImg(selectedImagePath);
    }
          else if(Build.VERSION.SDK_INT < 19)
            {
            realPath = this.getRealPathFromURI_FromAPI11_18(this, data.getData());
                setImgTextViews(Build.VERSION.SDK_INT, realPath);
            }
//----------->>>>>>>>>>>---------->>>>FOR VIDEO PATH SAVING------>>>>>>------------>>>>>>>>>>>-------->>>>>>>>>---------->>>>
        if (requestCode == RESULT_LOAD_VIDEO && resultCode == RESULT_OK && null != data)
        {
//FOR VIDEO PATH SAVING
            String selectedVidPath;
            Uri selectedVidUri = data.getData();
//VIDEO____PLAY___LIST
            selectedVidPath = ImageFilePath.getPath(getApplicationContext(), selectedVidUri);
            Log.i("VIDEO-->File Path-->", "" + selectedVidPath);
            setVIDTextViews(Build.VERSION.SDK_INT, selectedVidPath);
            SET_saveVid(selectedVidPath);
        }
    }
    public String getRealPathFromURI_FromAPI11_18(Context context, Uri contentUri)
    {
        String[] proj = { MediaStore.Images.Media.DATA };
        String result = null;
        CursorLoader cursorLoader = new CursorLoader(context, contentUri, proj, null, null, null);
        Cursor cursor = cursorLoader.loadInBackground();
        if(cursor != null){
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            result = cursor.getString(column_index);
        }
        return result;
    }
    protected void setImgTextViews(int sdk,String realPath){
    this.real_Imgpath.setText
           ("CURRENT VERSION--SDK-->"+sdk+"Real Path: "+realPath);
}
         protected void setVIDTextViews(int sdk,String realPath)
    {
               this.real_Vidpath.setText
            ("CURRENT VERSION--SDK-->"+sdk+"Real Path: "+realPath);
    }
//---->>------>>>------->>>>SETTERS--FOR IMAGE-->SET_saveImg(selectedImagePath) For &VIDEO -->>SET_saveVid(selectedVidPath)--->>AND--->>GETTERS FOR IMAGE AND VIDEO--------->>>>>
String realPath; String vidPath;
public String GET_saveImg()//IS CALLED FROM DATABASE_HELPER CLASS TO PROVIDE THE SETTER VALUES
{
    return realPath;
}
protected void SET_saveImg(String realPath)
{
    this.realPath=realPath;
}
      protected String GET_saveVid()
{
    return vidPath;
}
     protected void SET_saveVid(String vidPath)
{
  this.vidPath= vidPath;
}}
---------------------<<<<<<------------>>>>>>>>>>>>--------- DATABASEHELPER_class
 import android.content.ContentValues;
         import android.content.Context;
         import android.database.sqlite.SQLiteDatabase;
         import android.database.sqlite.SQLiteOpenHelper;
       public class DatabaseHelper extends SQLiteOpenHelper {
          SQLiteDatabase db;    User_overlay_save obj ;
      // Database Name
      public static String DATABASE_NAME = "MY_database.sql";
// Current version of database
private static final int DATABASE_VERSION = 1;
// Name of table
private static final String TABLE_Images = "images";
// All Keys used in table
 static final String KEY_ID = "id";
 static final String KEY_IMAGE = "image";
 static final String KEY_FILE = "file";
public static String TAG = "tag";
private static final String CREATE_TABLE_Images = "CREATE TABLE "
        + TABLE_Images + "(" + KEY_ID
        + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_IMAGE + "TEXT" +            KEY_FILE + " TEXT );";
      public DatabaseHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
         }
   /*This method is called by system if the database is accessed but not   yet created*/
 @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE_Images); // create Image table
    }
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int  newVersion)    {
    db.execSQL("DROP TABLE IF EXISTS " + CREATE_TABLE_Images); 
                            // drop               table if exists
    onCreate(db);
      }
   public boolean Insert()
   {      boolean success = false;
    String imgpath = obj.GET_saveImg();
    String vidPath = obj.GET_saveVid();
    db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(KEY_IMAGE, imgpath);
    values.put(KEY_FILE, vidPath);
    db.insert(TABLE_Images, null, values);
    success=true;
    db.close();
if(success) {
    return true;
}
else
{
    return false;
}
}
}
 
    