android开发笔记之widget UI 更新问题的一个样例

做了几个widget，觉得widget的UI更新是一个常用的功能，下面就做了一个笔记：

读者，先看明白下面这篇博文：

Android Widget 桌面数字时钟(DigtalClockWidget)实例
http://blog.csdn.net/ouyang_peng/article/details/8820506

下面是我的一个样例，可以查看一下：

1.

package com.android.alarmclock;//hongyu hexiaoming digital clock aolixing 20140227 startimport android.app.Service;import java.util.Timer;  import java.util.TimerTask;  import android.appwidget.AppWidgetManager;  import android.content.ComponentName;  import android.widget.RemoteViews;import android.content.Intent;import android.os.IBinder; import com.android.deskclock.R;import android.util.Log;import java.util.Calendar;import android.text.format.Time;public class HyDigitalWidgetUpdateService extends Service {private Timer timer;    private TimerTask timerTask = new TimerTask() {  @Override  public void run() {  updateDigitalWidgetUI();}  };  @Override  public void onCreate() {  super.onCreate();  timer = new Timer();  timer.schedule(timerTask, 0, 500);  }    @Override  public IBinder onBind(Intent intent) {return null;  }    @Override  public void onDestroy() {  super.onDestroy();timer.cancel();  timer = null;  }  private void updateDigitalWidgetUI() {RemoteViews clock = new RemoteViews(getPackageName(), R.layout.digital_appwidget);Log.i("digital_debug","updateDigitalWidgetUI");Calendar calendar = Calendar.getInstance(); int hour = calendar.get(Calendar.HOUR_OF_DAY);int minute = calendar.get(Calendar.MINUTE);  //Time time = new Time();    //time.setToNow();    //int hour = time.hour;    //int minute = time.minute;Log.i("digital_debug","updateDigitalWidgetUI---hour:"+hour);Log.i("digital_debug","updateDigitalWidgetUI---minute:"+minute);//if(hour > 12){if(calendar.get(Calendar.AM_PM) == 0){Log.i("digital_debug","updateDigitalWidgetUI---am:");clock.setImageViewResource(R.id.time_am_or_pm, R.drawable.hy_digital_widget_time_am);}else{Log.i("digital_debug","updateDigitalWidgetUI---pm:");clock.setImageViewResource(R.id.time_am_or_pm, R.drawable.hy_digital_widget_time_pm);}int hour_1 = hour/10;int hour_2 = hour%10;int minute_1 = minute/10;int minute_2 = minute%10;switch (hour_1) {case 0:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_0);break;case 1:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_1);break;case 2:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_2);break;case 3:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_3);break;case 4:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_4);break;case 5:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_5);break;case 6:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_6);break;case 7:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_7);break;case 8:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_8);break;case 9:clock.setImageViewResource(R.id.time_hour_1, R.drawable.hy_digital_widget_time_9);break;default:break;}switch (hour_2) {case 0:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_0);break;case 1:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_1);break;case 2:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_2);break;case 3:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_3);break;case 4:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_4);break;case 5:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_5);break;case 6:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_6);break;case 7:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_7);break;case 8:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_8);break;case 9:clock.setImageViewResource(R.id.time_hour_2, R.drawable.hy_digital_widget_time_9);break;default:break;}switch (minute_1) {case 0:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_0);break;case 1:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_1);break;case 2:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_2);break;case 3:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_3);break;case 4:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_4);break;case 5:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_5);break;case 6:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_6);break;case 7:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_7);break;case 8:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_8);break;case 9:clock.setImageViewResource(R.id.time_minute_1, R.drawable.hy_digital_widget_time_9);break;default:break;}switch (minute_2) {case 0:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_0);break;case 1:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_1);break;case 2:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_2);break;case 3:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_3);break;case 4:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_4);break;case 5:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_5);break;case 6:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_6);break;case 7:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_7);break;case 8:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_8);break;case 9:clock.setImageViewResource(R.id.time_minute_2, R.drawable.hy_digital_widget_time_9);break;default:break;}AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getApplicationContext()); ComponentName componentName = new ComponentName(getApplicationContext(), DigitalAppWidgetProvider.class);appWidgetManager.updateAppWidget(componentName, clock);  }}//hongyu hexiaoming digital clock aolixing 20140227 end

2.

public class DigitalAppWidgetProvider extends AppWidgetProvider {    private static final String TAG = "DigitalAppWidgetProvider";//hongyu hexiaoming digital clock aolixing 20140227 start@Overridepublic void onDisabled(Context context) {// TODO Auto-generated method stubcontext.stopService(new Intent(context, HyDigitalWidgetUpdateService.class));  }@Overridepublic void onEnabled(Context context) {// TODO Auto-generated method stubsuper.onEnabled(context);context.startService(new Intent(context, HyDigitalWidgetUpdateService.class)); }//hongyu hexiaoming digital clock aolixing 20140227 end

1.有用的相关资料：

这是一个widget开发的样例，可以看明白，就懂得widget开发的基本过程了：

android widget 开发实例 : 桌面便签程序的实现详解和源码 （上）

http://blog.csdn.net/silenceburn/article/details/6093074