Android动态显示当前年月日时分秒系统时间(示例代码)

在布局文件中放一个TextView用来显示时间，如下所示：

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@android:color/white">
 <TextView
  android:id="@+id/mytime"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:gravity="center"
  android:textColor="@android:color/black"
  android:textSize="36sp"/>
 </LinearLayout> 

开启一个线程，然后通过handler发消息，来实时的更新TextView上显示的系统时间：

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.format.DateFormat;
import android.widget.TextView;
public class TestActivity extends Activity {
  private static final int msgKey1 = 1;
  private TextView mTime;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.time);
    mTime = (TextView) findViewById(R.id.mytime);
    new TimeThread().start();
  }
  public class TimeThread extends Thread {
    @Override
    public void run () {
      do {
        try {
          Thread.sleep(1000);
          Message msg = new Message();
          msg.what = msgKey1;
          mHandler.sendMessage(msg);
        }
        catch (InterruptedException e) {
          e.printStackTrace();
        }
      } while(true);
    }
  }
  private Handler mHandler = new Handler() {
    @Override
    public void handleMessage (Message msg) {
      super.handleMessage(msg);
      switch (msg.what) {
        case msgKey1:
          mTime.setText(getTime());
          break;
        default:
          break;
      }
    }
  };
  //获得当前年月日时分秒星期
  public String getTime(){
    final Calendar c = Calendar.getInstance();
    c.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
    String mYear = String.valueOf(c.get(Calendar.YEAR)); // 获取当前年份
    String mMonth = String.valueOf(c.get(Calendar.MONTH) + 1);// 获取当前月份
    String mDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH));// 获取当前月份的日期号码
    String mWay = String.valueOf(c.get(Calendar.DAY_OF_WEEK));
    String mHour = String.valueOf(c.get(Calendar.HOUR_OF_DAY));//时
    String mMinute = String.valueOf(c.get(Calendar.MINUTE));//分
    String mSecond = String.valueOf(c.get(Calendar.SECOND));//秒
    if("1".equals(mWay)){
      mWay ="天";
    }else if("2".equals(mWay)){
      mWay ="一";
    }else if("3".equals(mWay)){
      mWay ="二";
    }else if("4".equals(mWay)){
      mWay ="三";
    }else if("5".equals(mWay)){
      mWay ="四";
    }else if("6".equals(mWay)){
      mWay ="五";
    }else if("7".equals(mWay)){
      mWay ="六";
    }
    return mYear + "年" + mMonth + "月" + mDay+"日"+" "+"星期"+mWay+" "+mHour+":"+mMinute+":"+mSecond;
  }
}  

以上所述是小编给大家介绍的Android动态显示当前年月日时分秒系统时间，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！