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我无法启动服务来更新我创建的AppWidget作为练习。我试图从DDMS中获取欺骗性位置数据的经度和纬度以显示在小部件中。该小部件使用一个服务来更新TextView，这可能稍微有点矫枉过正，但我想要遵循这个模板，这在AppWidgets中似乎很常见，可以完成更多工作（如预测小部件或维基文库小部件）。按钮点击无法启动Android应用程序小部件中的服务
现在，我没有收到任何错误消息或奇怪的行为;按下按钮时根本没有任何事情发生。对于什么可能是错误的，我有点神秘。任何人都可以指出我正确的方向吗？
另外，如果我的位置逻辑有问题，我也会喜欢这方面的建议。我查看了几个博客，Google示例和文档，但我对它的工作原理感到有些模糊。
这里是小工具的当前状态：
public class Widget extends AppWidgetProvider
{
static final String TAG = "Widget";
/**
* {@inheritDoc}
*/
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds)
{
// Create an intent to launch the service
Intent serviceIntent = new Intent(context, UpdateService.class);
// PendingIntent is required for the onClickPendingIntent that actually
// starts the service from a button click
PendingIntent pendingServiceIntent =
PendingIntent.getService(context, 0, serviceIntent, 0);
// Get the layout for the App Widget and attach a click listener to the
// button
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.main);
views.setOnClickPendingIntent(R.id.address_button, pendingServiceIntent);
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
// To prevent any ANR timeouts, we perform the update in a service;
// really should have its own thread too
public static class UpdateService extends Service
{
static final String TAG = "UpdateService";
private LocationManager locationManager;
private Location currentLocation;
private double latitude;
private double longitude;
public void onStart(Intent intent, int startId)
{
// Get a LocationManager from the system services
locationManager =
(LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Register for updates from spoofed GPS
locationManager.requestLocationUpdates("gps", 30000L, 0.0f, new LocationListener()
{
@Override
public void onLocationChanged(Location location)
{
currentLocation = location;
}
@Override
public void onProviderDisabled(String provider) {}
@Override
public void onProviderEnabled(String provider) {}
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {}
});
// Get the last known location from GPS
currentLocation =
locationManager.getLastKnownLocation("gps");
// Build the widget update
RemoteViews updateViews = buildUpdate(this);
// Push update for this widget to the home screen
ComponentName thisWidget = new ComponentName(this, Widget.class);
// AppWidgetManager updates AppWidget state; gets information about
// installed AppWidget providers and other AppWidget related state
AppWidgetManager manager = AppWidgetManager.getInstance(this);
// Updates the views based on the RemoteView returned from the
// buildUpdate method (stored in updateViews)
manager.updateAppWidget(thisWidget, updateViews);
}
public RemoteViews buildUpdate(Context context)
{
latitude = currentLocation.getLatitude();
longitude = currentLocation.getLongitude();
RemoteViews updateViews =
new RemoteViews(context.getPackageName(), R.layout.main);
updateViews.setTextViewText(R.id.latitude_text, "" + latitude);
updateViews.setTextViewText(R.id.longitude_text, "" + longitude);
return updateViews;
}
@Override
public IBinder onBind(Intent intent) {
// We don't need to bind to this service
return null;
}
}
}