package com.example.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.text.SimpleDateFormat;
import java.util.Date;


public class TestActivity extends Activity {
    int a=0;

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);

        Button test=(Button) findViewById(R.id.neibulei);
        test.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                a=5;
                new hhh().getnum();//呼叫改程式碼後，log打印出的a=0；因為重新 new 了一個TestActivity物件，引數均被初始化。
            }
        });
    }
    public static class hhh{
        public void getnum(){
            Log.i("czk","a="+new TestActivity().a);
        }
    }
}