Toask.makeText不能实现

控制台上能打印输出语句

package com.example.demo4;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.os.Bundle;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.Toast;

import android.os.Build;

public class MainActivity extends ActionBarActivity {

private Button bt1;

private Button bt2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

       bt1=(Button) findViewById(R.id.button1);

       bt2=(Button) findViewById(R.id.button2);

       bt1.setOnClickListener(new Myclick(){

      public void Onclick(View v)

      {

      super.onClick(v);

      Toast.makeText(MainActivity.this, "bt1要执行的逻辑",1).show();

      }

       });

    }

}

//外部类

class Myclick implements OnClickListener

{

public void onClick(View v)

{

Log.i("tag","父类的onClick事件");

}

}