Android AnalogClock TextClock DigitalClock Chronometer 时钟定时器

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AnalogClock 相关属性：

android:dial="@drawable/img1"  //表盘
android:hand_hour="@drawable/alert_dialog_icon" //时针
android:hand_minute="@drawable/alert_dialog_icon" //分针

TextClock 相关属性：

android:format12Hour="yyyy/mm/dd  hh:mm:ss"  //12小时 格式

android:format24Hour="yyyy/mm/dd  hh:mm:ss"  //24小时 格式

android:timeZone="+8" //时区设置

Chronometer 相关属性：

ch.setFormat("计时：%s");
ch.setBase(SystemClock.elapsedRealtime());
ch.start();
ch.stop();
ch.setOnChronometerTickListener();

package shortcut.song.com.myapplication;import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;public class ClockActivity extends AppCompatActivity {Chronometer ch;Button  mButtonStart;@Override
    protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_clock);ch = (Chronometer)findViewById(R.id.chronometer);mButtonStart = (Button)findViewById(R.id.start_chr);mButtonStart.setOnClickListener(new View.OnClickListener() {@Override
            public void onClick(View v) {ch.setBase(SystemClock.elapsedRealtime());ch.start();mButtonStart.setEnabled(false);}});ch.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {@Override
            public void onChronometerTick(Chronometer chronometer) {if (SystemClock.elapsedRealtime() - ch.getBase() > 20 * 1000){ch.stop();mButtonStart.setEnabled(true);}}});}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_clock"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="shortcut.song.com.myapplication.ClockActivity"><AnalogClock
        android:id="@+id/analogclock1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        /><AnalogClock
        android:id="@+id/analogclock2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/analogclock1"
        android:dial="@drawable/img1"
        android:hand_hour="@drawable/alert_dialog_icon"
        android:hand_minute="@drawable/alert_dialog_icon"
        /><DigitalClock
        android:id="@+id/digitalclock"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/analogclock2"
        /><TextClock
        android:id="@+id/textclock1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/digitalclock"
        android:timeZone="+7"
        android:format12Hour="yyyy年mm月dd日 hh:mm"
        /><TextClock
        android:id="@+id/textclock2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textclock1"
        android:format24Hour="yyyy/mm/dd  hh:mm:ss"
        android:timeZone="+8"
        /><Chronometer
        android:id="@+id/chronometer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textclock2"
        /><Button
        android:id="@+id/start_chr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/chronometer"
        android:text="Start"
        /></RelativeLayout>