数字及模拟小时钟设计（AnalogClock与DigitalClock的原理）

新建一个继承Activity类的AnalogClockAndDigitalClickActivity，并设置布局文件为：analogclockanddigitalclock.xml。

首先在布局文件中添加一个AnalogClock组件和DigitalClock组件和一个TextView组件。

<AnalogClock

        android:id="@+id/analogclockanddigitalclock_ac01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

 

 

    <DigitalClock

        android:id="@+id/analogclockanddigitalclock_dg01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

 

    <TextView

        android:id="@+id/analogclockanddigitalclock_tv01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/show_information"

        android:textSize="20sp"/>

而后在Activity代码中获取这3个组件。

package lyx.feng.second;

......

@SuppressWarnings("deprecation")

public class AnalogClockAndDigitalClickActivity extends Activity {

    private AnalogClockac = null;

    private DigitalClock dc = null;

    private TextViewtv = null;

    private Booleanflag = true;

    private static final int MESSAGE_WHAT = 1;

    private final Handler mHandler = new Handler() {

       public void handleMessage(android.os.Message msg) {

           switch (msg.what) {

           caseMESSAGE_WHAT:

              tv.setText(msg.obj.toString());

              break;

           }

       };

    };

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       super.setContentView(R.layout.analogclockanddigitalclock);

       this.ac = (AnalogClock)super

              .findViewById(R.id.analogclockanddigitalclock_ac01);

       this.dc = (DigitalClock)super

              .findViewById(R.id.analogclockanddigitalclock_dg01);

       this.tv = (TextView)super

              .findViewById(R.id.analogclockanddigitalclock_tv01);

       new MyThread().start();

    }

 

    private class MyThread extends Thread {

       @Override

       public void run() {

           do {

              Message msg = new Message();

              msg.what = MESSAGE_WHAT;

              String time = new SimpleDateFormat("yyyy-DD-mm HH:ss.S")

                     .format(new Date());

              try {

                  Thread.sleep(100);

              } catch (InterruptedException e) {

                  // TODO Auto-generated catch block

                  e.printStackTrace();

              }

              msg.obj = time;

              mHandler.sendMessage(msg);

           } while (flag);

       }

    }

 

    @Override

    protected void onDestroy() {

       super.onDestroy();

       flag = false;

    }

}