我在onreceive方法中按下appwidget上的按钮。当我按下按钮时,我想强制小部件调用onupdate方法。我该如何做到这一点?
提前致谢!
答案 0 :(得分:9)
Widget实际上无法响应点击,因为它不是一个单独的进程。但它可以启动服务来处理你的命令:
public class TestWidget extends AppWidgetProvider {
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
final int N = appWidgetIds.length;
// Perform this loop procedure for each App Widget that belongs to this provider
for (int i=0; i<N; i++) {
int appWidgetId = appWidgetIds[i];
// Create an Intent to launch UpdateService
Intent intent = new Intent(context, UpdateService.class);
PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0);
// Get the layout for the App Widget and attach an on-click listener to the button
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider_layout);
views.setOnClickPendingIntent(R.id.button, pendingIntent);
// Tell the AppWidgetManager to perform an update on the current App Widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
public static class UpdateService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//process your click here
return START_NOT_STICKY;
}
}
}
您还应该在清单文件中注册新服务:
<service android:name="com.xxx.yyy.TestWidget$UpdateService">
您可以在SDK
中的Wiktionary示例中找到另一个UpdateService实现示例这是另一个好方法Clickable widgets in android
答案 1 :(得分:3)
这有点粗糙,但对我来说效果相当好,因为我没有找到直接实施的强制更新方式。
public class Foo extends AppWidgetManager {
public static Foo Widget = null;
public static Context context;
public static AppWidgetManager AWM;
public static int IDs[];
public void onUpdate(Context context, AppWidgetManager AWM, int IDs[]) {
if (null == context) context = Foo.context;
if (null == AWM) AWM = Foo.AWM;
if (null == IDs) IDs = Foo.IDs;
Foo.Widget = this;
Foo.context = context;
Foo.AWM = AWM;
Foo.IDs = IDs;
.......
}
}
现在,在我想强制更新小部件的任何地方,它都很简单:
if (null != Foo.Widget) Foo.Widget.onUpdate(null, null, null);