String a;
    public void Onclick(View view)
    {
        ListView list=(ListView)findViewById(R.id.listview);
        EditText text3=(EditText)findViewById(R.id.editText3);
        Intent intent=getIntent();
        if(intent.getExtras()!=null) {
            a = intent.getStringExtra("this is a");
            Log.i("this is a", a);
        }
            ParseObject b=new ParseObject("User");
        b.put(a,text3.getText().toString());
        list2.add(text3.getText().toString());
        ArrayAdapter<String> a=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list2);
        list.setAdapter(a);
    }