Android获得当前系统时间、星期几、周几

Android获得当前系统时间有好几种方法，本文使用的是System.currentTimeMillis->Date+SimpleDateFormat，我觉得这种方式来展示时间非常的灵活。

执行结果图：



源码：

package com.example.shen.systemtime;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

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

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

long time=System.currentTimeMillis();
Date date=new Date(time);
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒 EEEE");
Log.e("time","time1="+format.format(date));
format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Log.e("time","time2="+format.format(date));
format=new SimpleDateFormat("yyyy/MM/dd");
Log.e("time","time3="+format.format(date));
format=new SimpleDateFormat("HH:mm:ss");
Log.e("time","time4="+format.format(date));
format=new SimpleDateFormat("EEEE");
Log.e("time","time5="+format.format(date));
format=new SimpleDateFormat("E");
Log.e("time","time6="+format.format(date));
}
}