AdapterViewde dinamik buton oluşturma

Adapterview de dinamik buton olutururken hata alıyorum yardımcı olabilirmisiniz 2 gündür çözmeye çalışıyorum bi sonuca varamadım . contextleri view yerine activity yapmayı denedim yine olmadı

MESAJADAPTER.JAVA KODLARI

package com.proje.adapter;

import android.app.Activity; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.LinearLayout; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast;

import com.android.volley.AuthFailureError; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.ImageLoader; import com.android.volley.toolbox.NetworkImageView; import com.android.volley.toolbox.StringRequest; import com.android.volley.toolbox.Volley; import com.proje.AppController; import com.proje.R; import com.proje.model.Mesaj;

import java.util.HashMap; import java.util.List; import java.util.Map;

public class MesajAdapter extends BaseAdapter { private Activity activity; private LayoutInflater inflater; private List<itiraf> mesajItems; ImageLoader imageLoader = AppController.getInstance().getImageLoader();

public MesajAdapter(Activity activity, List<Mesaj> itirafItems) {
    this.activity = activity;
    this.mesajItems = mesajItems;
}

@Override
public int getCount() {
    return MesajItems.size();
}

@Override
public Object getItem(int location) {
    return MesajItems.get(location);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (inflater == null)
        inflater = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    if (convertView == null)
        convertView = inflater.inflate(R.layout.mesaj_liste, null, false);

    if (imageLoader == null)
        imageLoader = AppController.getInstance().getImageLoader();
    NetworkImageView profilResmi = (NetworkImageView) convertView
            .findViewById(R.id.profil_resmi);
    TextView konu = (TextView) convertView.findViewById(R.id.mesajkonu);
    TextView icerik = (TextView) convertView.findViewById(R.id.mesajicerik);
    TextView begeni = (TextView) convertView.findViewById(R.id.mesajbegeni);
    TextView tarih = (TextView) convertView.findViewById(R.id.mesajtarih);

    // Her bir itiraf satırı için bilgi alınıyor
    final Itiraf m = mesajItems.get(position);

    // Profil resmi
    profilResmi.setImageUrl(m.getProfilResmi(), imageLoader);

    // Konu
    konu.setText(m.getKonu());

    //İçerik
    icerik.setText(m.getIcerik());

    // Begeni
    begeni.setText(String.valueOf(m.getBegeni()));

    // Tatih
    tarih.setText(String.valueOf(m.getTarih()));

    Button myButton1 = new Button(convertView.getContext());
    final LinearLayout ll = (LinearLayout) convertView.findViewById(R.id.mesaj_layout) ;  // butonun eklenecegi layout tanimlandi
    myButton1.setId(1);   // butona id atandi
    myButton1.setX(100);  // butona x koordinati verildi
    myButton1.setY(50);  // butona y koordinati verildi
    myButton1.setText("DinamikButon");
    final int id=myButton1.getId();
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(150,80);  // butonun boyutlari verildi
    myButton1 = ((Button) convertView.findViewById(id));
    ll.addView(myButton1, lp);  __Hata veren satır__
    myButton1.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {  // butonun click olayi
            Toast.makeText(view.getContext(),
                    "Button a tiklandi", Toast.LENGTH_SHORT)
                    .show();
        }
    });

    return convertView;
}

}

HATA KODLARI

08-16 07:38:05.381 1198-1198/com.proje E/AndroidRuntime: FATAL EXCEPTION: main java.lang.NullPointerException

at android.view.ViewGroup.addViewInner(ViewGroup.java:3377)

at android.view.ViewGroup.addView(ViewGroup.java:3249)

at android.view.ViewGroup.addView(ViewGroup.java:3225)

at com.proje.adapter.MesajAdapter.getView(MesajAdapter.java:104)

at android.widget.AbsListView.obtainView(AbsListView.java:2267)

at android.widget.ListView.makeAndAddView(ListView.java:1769)

at android.widget.ListView.fillDown(ListView.java:672)

at android.widget.ListView.fillFromTop(ListView.java:733)

at android.widget.ListView.layoutChildren(ListView.java:1608)

at android.widget.AbsListView.onLayout(AbsListView.java:2102)

at android.view.View.layout(View.java:13754)