Probleme au click d'un Button

package com.example;
import android.view.View.OnTouchListener;
import android.view.View.OnClickListener;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import com.example.R;
import android.widget.TextView;
public class MainActivity extends Activity {


  
  TextView title = null;
  
  
  
  Button b1 = null;
  
  
  
    
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  
    setContentView(R.layout.activity_main);
    
    b1 = (Button) findViewById(R.id.bouton1);
    title = (TextView) findViewById(R.id.txt_titre);
    

    b1.setOnTouchListener(touchListenerBouton1);
    b1.setOnClickListener(clickListenerBoutons);
  
  }
private OnClickListener clickListenerBoutons = new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        switch(v.getId()){
        
        case R.id.bouton1:
        title.setText(R.string.title_modifier);
        break;
        
        
        
        
      }
      
    }
  };

  private OnTouchListener touchListenerBouton1 = new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
      /* Réagir au toucher pour le bouton 1*/
      
      return onTouch(v, event);
    }
  };


    };