Android 用Time和Calendar获取系统当前时间

概述

效果图

源码：

import android.app.Activity;
import android.os.Bundle;
import android.text.format.Time;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.util.Calendar;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class MainActivity extends Activity {

@BindView(R.id.tv_time)
TextView tvTime;
@BindView(R.id.activity_main)
RelativeLayout activityMain;
@BindView(R.id.tv_cal)
TextView tvCal;
Time time;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
tvTime.setText("Time类");
tvCal.setText("Calender类");
initTime();
}
private void initTime() {
time = new Time();
time.setToNow();
}
@OnClick({R.id.tv_cal,R.id.tv_time})
public void onClick(View view) {
switch (view.getId()) {
case R.id.tv_time://点击第一个
//月份是从0-11算的，所以显示的话要+1
String times = time.year + "年" + time.month+1 + "月" + time.monthDay
+ "日" + time.hour + "时" + time.minute + "分" + time.second + "秒"
+ ":现在是一年中的第" + time.yearDay + "天";
tvTime.setText(times);
break;
case R.id.tv_cal:
Calendar cal=Calendar.getInstance();
String time_cal=""+cal.get(Calendar.YEAR)+"-"+cal.get(Calendar.MONTH)+1+"-"+cal.get(Calendar.DATE)+" "
+cal.get(Calendar.HOUR_OF_DAY)+":"+cal.get(Calendar.MINUTE);
tvCal.setText(time_cal);
break;
}
}

@Override
protected void onDestroy() {
super.onDestroy();
//        Unbinder unbinder=ButterKnife.bind(this);
//        unbinder.unbind();
ButterKnife.bind(this).unbind();
}

}