Android AnalogClock TextClock DigitalClock Chronometer 时钟 定时器

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>