Android动态显示当前年月日时分秒系统时间

<?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>

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;
}

}