package com.example.yanlei.myapplication;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import java.text.SimpleDateFormat;

import java.util.Date;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //手工增加代码开始

        //将按钮绑定一个单操作的事件监听器。用于监听用户的单击操作。

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

        button.setOnClickListener(myOnClickListener);

    }

    public static String getCurrentTime() {

        SimpleDateFormat df = new SimpleDateFormat("yyyy'年'MM'月'dd'日' HH:mm:ss");

        return df.format(new Date());

    }

    boolean checkNetwork() {

        // 实例化ConnectivityManager

        ConnectivityManager manager = (ConnectivityManager)this.getSystemService(Context.CONNECTIVITY_SERVICE);

        // 获得当前网络信息

        NetworkInfo info = manager.getActiveNetworkInfo();

        // 判断是否连接

        if (info == null || !info.isConnected()) {

            return false;

            }

        return true;

        }

    //手动增加代码开始

    private View.OnClickListener myOnClickListener = new View.OnClickListener() {

        public void onClick(View v) {

            //增加自己的代码......

//            Button pButton = (Button) findViewById(R.id.button2);

//            pButton.setText("OnClick. " + "my 新");

            /*Intent intent=new Intent();

            intent.setComponent(new ComponentName("com.android.calendar", "com.android.calendar.LaunchActivity"));

            startActivity(intent);*/

            TextView pTextView=(TextView)findViewById(R.id.textView2);

            String str=pTextView.getText().toString();

            if (checkNetwork()) {

                pTextView.setText("已连上网");

            }

            else {

                pTextView.setText("已连不上网");

            }

        }

    };

    //手动增加代码结束

}