Android's Chronometer

First define the Activity_main.xml file

The code is as follows:

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    android:orientation=" vertical "    android:layout_width=" Fill_parent    " android:layout_height= "Fill_parent" ><chronometer     android:id= "@+id/mychronometer"    android:layout_ Width= "Wrap_content"    android:layout_height= "wrap_content"/><linearlayout     android:orientation= " Horizontal "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent ">    <Button         android:id= "@+id/butstart"        android:text= "Start timing"        android:layout_width= "Wrap_content"        android:layout_height= "Wrap_content"/>    <button         android:id= "@+id/butstop" android:text= "        Stop timing "        android:layout_width=" wrap_content "        android:layout_height=" Wrap_content "/></linearlayout ></LinearLayout>

Then rewrite the Mainactivity class

The code is as follows:

Package Com.example.myclock;import Android.os.bundle;import Android.os.systemclock;import android.os.Vibrator; Import Android.app.activity;import android.app.service;import Android.view.menu;import Android.view.View;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.chronometer;import Android.widget.chronometer.onchronometerticklistener;public class Mainactivity extends Activity {private chronometer    Mychronometer = null;private Button Butstart = null;private button Butstop = null;private Vibrator vibrator = null;        @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main);        This.mychronometer = (chronometer) Super.findviewbyid (r.id.mychronometer);        This.vibrator = (vibrator) super.getapplication (). Getsystemservice (Service.vibrator_service);        This.butstart = (Button) Super.findviewbyid (R.id.butstart); This.butstop = (Button) super.fiNdviewbyid (R.id.butstop);        This.butStart.setOnClickListener (New Onclicklistenerlmplstart ());        This.butStop.setOnClickListener (New Onclicklistenerlmplstop ()); This.myChronometer.setFormat ("Current time:%s.")        ");            This.myChronometer.setOnChronometerTickListener (New Onchronometerticklistenerlmpl ()); } Private class Onchronometerticklistenerlmpl implements onchronometerticklistener{public void Onchronometertick (Ch    Ronometer chronometer) {String time = Chronometer.gettext (). toString (). ReplaceAll ("[^ (\\d{2}:\\d{2})]", "");    if ("01:00". Equals (Time)) {MainActivity.this.vibrator.vibrate (new long[]{1000,10,1000,100},0); }}} Private class Onclicklistenerlmplstart implements onclicklistener{public void OnClick (view view) {Ma    InActivity.this.myChronometer.start (); }} Private class Onclicklistenerlmplstop implements onclicklistener{public void OnClick (view view) {Mainacti    Vity.this.myChronometer.stop (); Mainactivity.this. Mychronometer.setbase (Systemclock.elapsedrealtime ());    MainActivity.this.vibrator.cancel (); }} @Override public boolean Oncreateoptionsmenu (Menu menu) {getmenuinflater (). Inflate (R.menu.activity_ma        in, menu);    return true; }}

Finally rewrite the Androidmainfest.xml file

The code is as follows:

<manifest xmlns:android= "http://schemas.android.com/apk/res/android"    package= "Com.example.myclock    " Android:versioncode= "1"    android:versionname= "1.0" >    <uses-sdk        android:minsdkversion= "        android:targetsdkversion= "/>    <application        android:icon=" @drawable/ic_launcher "        android: Label= "@string/app_name"        android:theme= "@style/apptheme" >        <activity            android:name= ". Mainactivity "            android:label=" @string/title_activity_main ">            <intent-filter>                <action Android:name= "Android.intent.action.MAIN"/>                <category android:name= "Android.intent.category.LAUNCHER "/>            </intent-filter>        </activity>    </application><uses-permission     Android:name= "Android.permission.VIBRATE"/></manifest>

Operating effects such as:

Android chronometer