package comxunfang.button;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    private Button bt;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        bt = (Button) findViewById(R.id.btn);

        //第一种

        bt.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                Toast.makeText(this, "这是第1种写法",0).show();

            }

        });

    }