我有以下课程：
...
public class FragmentMapa extends Fragment {
/*
* Atributos
*/
private static String LOG_TAG = "FragmentMapa";
private HomeActivity homeActivity;
private GoogleMap mMapa;
private DrawerLayout mDrawer;
private ActionBarDrawerToggle mDrawerToggle;
private ListView mDrawerList;
private ListView mDrawerRightList;
private RelativeLayout mDrawerRelativeLayout;
private String[] mRightDrawerMenuTitles;
private ImageView mDiputacionLogo;
private IncidenciasFetchAsyncTask mFetchIncidenciasTask;
private Incidencias mIs;
private CamarasFetchAsyncTask mFetchCamarasTask;
private Camaras mCams;
private ViabilidadesInvernalesFetchAsyncTask mFetchViabilidadesInvernalesTask;
private ViabilidadesInvernales mVis;
private static LatLng POS_CENTRAL = new LatLng(43.243968,-2.896957);
private static LatLng limiteSurOesteBizkaia = new LatLng(42.895853,-3.594589);
private static LatLng limiteNorEsteBizkaia = new LatLng(43.540351,-2.180099);
private static final LatLngBounds BOUNDS = new LatLngBounds(limiteSurOesteBizkaia, limiteNorEsteBizkaia);
private ArrayList<Marker> markersIncidencias = new ArrayList<Marker>();
private ArrayList<Marker> markersObras = new ArrayList<Marker>();
private ArrayList<Marker> markersCamaras = new ArrayList<Marker>();
private ArrayList<Marker> markersViabilidadInvernal = new ArrayList<Marker>();
/*
* Métodos
*/
public FragmentMapa() {
}
@Override
public void onAttach (Activity activity) {
super.onAttach(activity);
homeActivity = (HomeActivity) activity;
mRightDrawerMenuTitles = getResources().getStringArray(R.array.mapa_submenu_options);
mDrawer = homeActivity.getmDrawer();
mDrawerRightList = homeActivity.getmDrawerRightList();
mDrawerRightList.setAdapter(new ArrayAdapter<String>(
homeActivity.getSupportActionBar().getThemedContext(),
R.layout.rightdrawer_map_list_item,
mRightDrawerMenuTitles
));
mDrawerRightList.setOnItemClickListener(new DrawerItemClickListener());
}
@Override
public void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.mapa, container, false);
setupMapIfNeeded();
return rootView;
}
private void setupMapIfNeeded() {
if( mMapa == null ){
SupportMapFragment smf = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.mapaPrincipal);
if( smf != null ){
//Toast.makeText(getActivity(), "VAAAMOOSS", Toast.LENGTH_SHORT).show();
mMapa = smf.getMap();
}/*else{
Toast.makeText(getActivity(), "smf es null...", Toast.LENGTH_SHORT).show();
}*/
if( mMapa != null ){
setupMap();
}
}
}
private void setupMap() {
//Toast.makeText(getActivity(), "A configurar el mapa!!", Toast.LENGTH_SHORT).show();
CameraPosition camPos;
camPos = new CameraPosition.Builder()
.target(POS_CENTRAL)
.zoom((float) 9.5)
.build();
final CameraUpdate camUpd =
CameraUpdateFactory.newCameraPosition(camPos);
mMapa.animateCamera(camUpd);
mMapa.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition newPos) {
float maxZoom = 17.0f;
if( !BOUNDS.contains(newPos.target) ){
//Mover la cámara al centro si se
//va más allá de los límites
mMapa.animateCamera(camUpd);
}
if(newPos.zoom > maxZoom){
mMapa.animateCamera(CameraUpdateFactory.zoomTo(maxZoom));
}
}
});
mMapa.setOnInfoWindowClickListener( new OnInfoWindowClickListener(){
public void onInfoWindowClick(Marker aMarker) {
Toast.makeText(getActivity(), "info window pulsado", Toast.LENGTH_SHORT).show();
if( markersCamaras.contains(aMarker) ){
Camara c = mCams.getCamaraByCoord(aMarker.getPosition());
homeActivity.showCameraFragment(c);
}
}
});
}
@Override
public void onActivityCreated (Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Override
public void onViewStateRestored (Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
}
@Override
public void onStart () {
super.onStart();
}
@Override
public void onResume () {
super.onResume();
}
@Override
public void onPause () {
super.onPause();
}
@Override
public void onStop () {
super.onStop();
}
@Override
public void onDestroyView () {
super.onDestroyView();
}
@Override
public void onDestroy () {
super.onDestroy();
}
@Override
public void onDetach () {
super.onDetach();
}
/* The click listener for ListView in the navigation drawer */
private class DrawerItemClickListener implements OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
final int thePos = position;
mDrawer.setDrawerListener( new DrawerLayout.SimpleDrawerListener(){
@Override
public void onDrawerClosed(View drawerView) {
boolean wasChecked = !mDrawerRightList.isItemChecked(thePos);
//Toast.makeText(homeActivity, "Item pulsado: " + wasChecked, Toast.LENGTH_SHORT).show();
mDrawerRightList.setItemChecked(thePos, !wasChecked);
switch (thePos) {
case 0:
//Incidencias
//Toast.makeText(homeActivity, "Incidencias", Toast.LENGTH_SHORT).show();
if(!wasChecked){
//Toast.makeText(homeActivity, "Incidencias estaba sin pulsar", Toast.LENGTH_SHORT).show();
getIncidenciasObras();
introducirIncidencias();
}else{
//Toast.makeText(homeActivity, "Incidencias estaba pulsado", Toast.LENGTH_SHORT).show();
removeIncidenciasMarkers();
}
break;
case 1:
//Obras
//Toast.makeText(homeActivity, "Obras", Toast.LENGTH_SHORT).show();
if(!wasChecked){
//Toast.makeText(homeActivity, "Obras estaba sin pulsar", Toast.LENGTH_SHORT).show();
getIncidenciasObras();
introducirObras();
}else{
//Toast.makeText(homeActivity, "Obras estaba pulsado", Toast.LENGTH_SHORT).show();
removeObrasMarkers();
}
break;
case 2:
//Cámaras
//Toast.makeText(homeActivity, "Cámaras", Toast.LENGTH_SHORT).show();
if(!wasChecked) {
getCamaras();
introducirCamaras();
}else
removeCamarasMarkers();
break;
case 3:
//Viabilidad invernal
//Toast.makeText(homeActivity, "Viabilidad invernal", Toast.LENGTH_SHORT).show();
if(!wasChecked){
getViabilidadesInvernales();
introducirViabilidadInvernal();
}else
removeViabilidadInvernalMarkers();
break;
default:
//Toast.makeText(homeActivity, "Default", Toast.LENGTH_SHORT).show();
break;
}
}
});
if(mDrawer.isDrawerOpen(Gravity.END))
mDrawer.closeDrawer(mDrawerRightList);
}
}
private void getViabilidadesInvernales(){
mVis = ViabilidadesInvernales.getInstance();
if(mVis.isEmptyViabilidadesInvernales()){
mFetchViabilidadesInvernalesTask = new ViabilidadesInvernalesFetchAsyncTask(homeActivity);
try {
mVis = mFetchViabilidadesInvernalesTask.execute("es").get();
} catch (InterruptedException e) {
Log.e(LOG_TAG, "Error InterruptedException: " + e.getMessage());
e.printStackTrace();
} catch (ExecutionException e) {
Log.e(LOG_TAG, "Error ExecutionException: " + e.getMessage());
e.printStackTrace();
}
}
}
...
private void introducirViabilidadInvernal() {
if(markersViabilidadInvernal.isEmpty()){
Marker aMarker;
for (ViabilidadInvernal vi : mVis.getViabilidades()) {
String estado = "";
BitmapDescriptor icon;
if(vi.getEstado() == PuertoEstado.ABIERTO){
estado = getResources().getString(R.string.mapa_puerto_abierto);
icon = BitmapDescriptorFactory.fromResource(R.drawable.marker_puertoabierto);
}else{
//vi.getEstado() == PuertoEstado.CERRADO
estado = getResources().getString(R.string.mapa_puerto_cerrado);
icon = BitmapDescriptorFactory.fromResource(R.drawable.marker_puertocerrado);
}
aMarker = mMapa.addMarker(new MarkerOptions()
.position(vi.getCoord())
.title(vi.getT())
.snippet(estado)
.icon(icon));
markersViabilidadInvernal.add(aMarker);
}
}
}
private void removeViabilidadInvernalMarkers() {
for(Marker aMarker : markersViabilidadInvernal){
aMarker.remove();
}
}
...
private class ViabilidadesInvernalesFetchAsyncTask extends AsyncTask<String, Void, ViabilidadesInvernales>{
private ProgressDialog mPd;
private HomeActivity ownerActivity;
private Context context;
private Exception exceptionToBeThrown;
public ViabilidadesInvernalesFetchAsyncTask(Activity activity){
this.ownerActivity = (HomeActivity) activity;
context = activity;
this.exceptionToBeThrown = null;
mPd = new ProgressDialog(context);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mPd.setTitle("cargando");
mPd.setMessage("miralo");
//mPd.setTitle(getResources().getString(R.string.mapa_cargando_titulo));
//mPd.setMessage(getResources().getString(R.string.mapa_cargando, getResources().getString(R.string.mapa_cargando_elemento_viabilidad)));
mPd.setCancelable(false);
mPd.setIndeterminate(true);
mPd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mPd.show();
}
@Override
protected ViabilidadesInvernales doInBackground(String... params) {
String idioma = params[0];
if(!idioma.equalsIgnoreCase("es") && !idioma.equalsIgnoreCase("eu")){
idioma = "es";
}
SystemClock.sleep(5000);
ViabilidadesInvernalesParser vip = new ViabilidadesInvernalesParser();
ViabilidadesInvernales lasViabilidades = vip.parse(idioma);
Log.d(LOG_TAG, lasViabilidades.toString());
ViabilidadesInvernales vis = ViabilidadesInvernales.getInstance();
return vis;
}
@Override
protected void onPostExecute(ViabilidadesInvernales vis) {
super.onPostExecute(vis);
mVis = vis;
if(mPd != null){
mPd.dismiss();
}
// Check if exception exists.
//if (exceptionToBeThrown != null) {
//TODO
//ownerActivity.handleXXX();
//throw exceptionToBeThrown;
//}
}
}
....
}
目标是在执行AsyncTask时显示一个Dialog（ProgressDialog），以便Dialog保持在UI前面片刻，然后，地图（之前显示）返回到前面。更确切地说，您启动应用程序（家庭活动），打开左侧抽屉，按Mapa并转到当前片段。显示空地图。您打开右侧抽屉并按下按钮。之后，执行启动AsyncTask的过程（以及我想要的ProgressDialog）。
我不知道为什么，但ProgressDialog没有被展示，但我已经意识到＆＃34;睡眠＆＃34;进程正常（每次都正确执行AsyncTask）。
任何人都可以伸出援助之手吗？
PS：我的主要活动（HomeActivity）启动片段。主要活动有两个抽屉：左抽屉始终可见，右抽屉只有在启动FragmentMapa时才能看到（我现在正在向您显示片段）。这个问题可能是由于抽屉行为造成的吗？
非常感谢你
答案 0 :(得分：0)
解决。如果遇到此问题，请查看以下帖子：https://stackoverflow.com/a/3291713/828551。
您必须创建一个接口，在AsyncTask中创建它的实例，并实现启动AsyncTask的主类接口。