我在 onreceive 方法中响应我的 appwidget 上的按钮按下。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!
我在 onreceive 方法中响应我的 appwidget 上的按钮按下。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!
小部件实际上无法响应点击,因为它不是一个单独的进程运行。但它可以启动服务来处理您的命令:
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 的维基词典示例中找到另一个 UpdateService 实现示例
这是另一个好方法android中的可点击小部件
这有点粗略,但对我来说效果很好,因为我发现没有直接实现的方法来强制更新。
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,在任何我想强制更新小部件的地方,它都很简单:
if (null != Foo.Widget) Foo.Widget.onUpdate(null, null, null);