之后×时间的Android窗口小部件更新 [英] Android widget update after x time
本文介绍了之后×时间的Android窗口小部件更新的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我刚开始学的Android，我想写一个控件，它正在更新每秒计数器，而是介于它缺少something.I'm获得1在屏幕上。我使用的是安卓4.0模拟器。
包com.ibluekey;
进口java.text.DateFormat中;
进口java.text.SimpleDateFormat的;
进口java.util.Date;
进口java.util.Locale中;
进口com.ibluekey.R;
进口android.app.PendingIntent;
进口android.app.Service;
进口android.appwidget.AppWidgetManager;
进口android.appwidget.AppWidgetProvider;
进口android.content.Context;
进口android.content.Intent;
进口android.os.Handler;
进口android.os.IBinder;
进口android.os.SystemClock;
进口android.util.Log;
进口android.widget.RemoteViews;
进口android.widget.Toast;
公共类WidgetActivity扩展AppWidgetProvider {
公共静态WidgetActivity Widgetke = NULL;
公共静态上下文的背景下;
公共静态AppWidgetManager appWidgetManager;
公共静态INT appWidgetIds [];
私人处理程序mHandler =新的处理程序（）;
私有静态诠释计数= 0;
@覆盖
公共无效的OnUpdate（上下文的背景下，AppWidgetManager appWidgetManager，INT [] appWidgetIds）{
如果（空==上下文）语境= WidgetActivity.context;
如果（空== appWidgetManager）appWidgetManager = WidgetActivity.appWidgetManager;
如果（空== appWidgetIds）appWidgetIds = WidgetActivity.appWidgetIds;
WidgetActivity.Widgetke =这一点;
WidgetActivity.context =背景;
WidgetActivity.appWidgetManager = appWidgetManager;
WidgetActivity.appWidgetIds = appWidgetIds;
Log.d（PXR，的onupdate）;
最终诠释N = appWidgetIds.length;
的for（int i = 0; I＆n种;我++）{
INT appWidgetId = appWidgetIds [I]
updateAppWidget（背景下，appWidgetManager，appWidgetId）;
}
}
静态无效updateAppWidget（上下文的背景下，AppWidgetManager appWidgetManager，
INT appWidgetId）{
算上++;
/ *意向意图=新的意图（背景下，UpdateService.class）;
PendingIntent pendingIntent = PendingIntent.getService（上下文，0，意图，0）;
RemoteViews remoteViews =新RemoteViews（context.getPackageName（），R.layout.widget）;
remoteViews.setOnClickPendingIntent（R.id.mainlayout，pendingIntent）;
remoteViews.setTextViewText（R.id.test_out，+计）;
//告诉小插件管理器
appWidgetManager.updateAppWidget（appWidgetId，remoteViews）; * /
RemoteViews意见=新RemoteViews（context.getPackageName（），R.layout.widget）;
views.setTextViewText（R.id.test_out，算上+）;
appWidgetManager.updateAppWidget（appWidgetId，意见）;
}
公共静态类UpdateService延伸服务{
@覆盖
公共无效ONSTART（意向意图，诠释startId）{
//WidgetActivity.Widgetke.onUpdate(context，appWidgetManager，appWidgetIds）;
//Toast.makeText(context，更新小工具，Toast.LENGTH_SHORT）.show（）;
WidgetActivity.Widgetke.mHandler.removeCallbacks（WidgetActivity.Widgetke.mUpdateTimeTask）;
WidgetActivity.Widgetke.mHandler.postDelayed（WidgetActivity.Widgetke.mUpdateTimeTask，100）;
}
@覆盖
公众的IBinder onBind（意向为arg0）{
返回null;
}
}
私人可运行mUpdateTimeTask =新的Runnable（）{
公共无效的run（）{
WidgetActivity.Widgetke.onUpdate（背景下，appWidgetManager，appWidgetIds）;
WidgetActivity.Widgetke.mHandler.postAtTime（这一点，1000）;
}
};
}
＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT;舱单的xmlns：机器人=http://schemas.android.com/apk/res/android
包=com.ibluekey
安卓版code =1
机器人：VERSIONNAME =1.0＆GT;
＆LT;使用-SDK安卓的minSdkVersion =4/＆GT;
＆lt;应用机器人：图标=@可绘制/图标机器人：标签=@字符串/ APP_NAME机器人：可调试=真正的＆GT;
＆LT;接收机器人：Reciever名称=机器人：标签=@字符串/ APP_NAME＆GT;
＆LT;意向滤光器＆gt;
＆lt;作用机器人：名称=MyTestIntent/＆GT;
＆所述; /意图滤光器＆gt;
＆LT; /接收器＆GT;
＆LT;接收器的Android版本：NAME =com.ibluekey.WidgetActivity机器人：标签=@字符串/ APP_NAME＆GT;
＆LT;意向滤光器＆gt;
＆lt;作用机器人：名称=android.appwidget.action.APPWIDGET_UPDATE/＆GT;
＆所述; /意图滤光器＆gt;
＆所述;元数据
机器人：名称=android.appwidget.provider
机器人：资源=@ XML / widgetprovider/＆GT;
＆LT; /接收器＆GT;
＆LT;服务机器人：名称=com.ibluekey.WidgetActivity $ UpdateService/＆GT;
＆LT; /用途＆gt;
＆LT; /舱单＆GT;
解决方案
下面是一个伟大的系列教程中的Android创建部件和间隔更新它们。它从这里开始： 的http://android-er.blogspot.com/2010/10/simple-home-screen-app-widget-with.html
和结束在这里有一个定期定时器/报警： http://android-er.blogspot.com /2010/10/app-widget-using-alarm-manager.html
基本上，你需要设置一些事情的清单来侦听广播意图而更新微件。它也展示了如何创建小部件一个配置的活动。
要创建的报警或经常性的活动，你也可以使用AlarmManager类。
I just started to learn Android, I'm trying to write a widget which is updating the counter in every seconds, but somewhere it's missing something.I'm getting 1 on the screen. I'm using Android 4 emulator.
package com.ibluekey;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import com.ibluekey.R;
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.SystemClock;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.Toast;
public class WidgetActivity extends AppWidgetProvider {
public static WidgetActivity Widgetke = null;
public static Context context;
public static AppWidgetManager appWidgetManager;
public static int appWidgetIds[];
private Handler mHandler = new Handler();
private static int count=0;
@Override
public void onUpdate( Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds ) {
if (null == context) context = WidgetActivity.context;
if (null == appWidgetManager) appWidgetManager = WidgetActivity.appWidgetManager;
if (null == appWidgetIds) appWidgetIds = WidgetActivity.appWidgetIds;
WidgetActivity.Widgetke = this;
WidgetActivity.context = context;
WidgetActivity.appWidgetManager = appWidgetManager;
WidgetActivity.appWidgetIds = appWidgetIds;
Log.d("PXR", "onUpdate");
final int N = appWidgetIds.length;
for (int i=0; i<N; i++) {
int appWidgetId = appWidgetIds[i];
updateAppWidget(context,appWidgetManager, appWidgetId);
}
}
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
count++;
/*Intent intent = new Intent(context, UpdateService.class);
PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
remoteViews.setOnClickPendingIntent(R.id.mainlayout, pendingIntent);
remoteViews.setTextViewText(R.id.test_out, ""+count);
// Tell the widget manager
appWidgetManager.updateAppWidget(appWidgetId, remoteViews);*/
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
views.setTextViewText(R.id.test_out, count+"");
appWidgetManager.updateAppWidget(appWidgetId, views);
}
public static class UpdateService extends Service {
@Override
public void onStart(Intent intent, int startId) {
//WidgetActivity.Widgetke.onUpdate(context, appWidgetManager, appWidgetIds);
//Toast.makeText(context, "Update Widget", Toast.LENGTH_SHORT).show();
WidgetActivity.Widgetke.mHandler.removeCallbacks(WidgetActivity.Widgetke.mUpdateTimeTask);
WidgetActivity.Widgetke.mHandler.postDelayed(WidgetActivity.Widgetke.mUpdateTimeTask, 100);
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
WidgetActivity.Widgetke.onUpdate(context, appWidgetManager, appWidgetIds);
WidgetActivity.Widgetke.mHandler.postAtTime(this, 1000);
}
};
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ibluekey"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" />
<application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true">
<receiver android:name=".Reciever" android:label="@string/app_name">
<intent-filter>
<action android:name="MyTestIntent" />
</intent-filter>
</receiver>
<receiver android:name="com.ibluekey.WidgetActivity" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/widgetprovider" />
</receiver>
<service android:name="com.ibluekey.WidgetActivity$UpdateService" />
</application>
</manifest>
解决方案
Here is a great tutorial series for creating widgets in Android and updating them at intervals. It starts here: http://android-er.blogspot.com/2010/10/simple-home-screen-app-widget-with.html
And ends here with a recurring timer/alarm: http://android-er.blogspot.com/2010/10/app-widget-using-alarm-manager.html
Basically you need to setup some things in the manifest to listen for a broadcasted intent which updates the widget. It also shows how to create a config activity for the widget.
To create alarms or recurring events you can also use the AlarmManager class.
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