我正在创建一个实现此slide-out Menu的应用程序，我对实现非常满意。
我将我的应用分为多个Fragment一个Activity，因此菜单的每个部分都有一个Fragment。
关键是我有OnItemClickListener允许我在Fragments之间切换beet，所以我尝试了两种方法：
replace()：它适用于所有片段，除了其中一个片段加载包含地图（code below）的XML。在第一次加载时没有问题但是当我切换到另一个片段并回到带有地图的片段时，应用程序崩溃。
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
<RelativeLayout
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageButton
android:id="@+id/refreshButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginTop="63dp"
android:src="@drawable/refresh"
android:text="Rafraichir" />
</RelativeLayout>
公共类MapFragment扩展了Fragment工具 OnInfoWindowClickListener，LocationListener {
private GoogleMap gMap;
Geocoder geocoder;
private LocationManager locationManager;
private Location userLocation;
private String provider;
private ImageButton refreshButton;
ArrayList<Parking> Parkings;
Context context;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragmen_map,
container, false);
gMap = ((SupportMapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
gMap.setOnInfoWindowClickListener(this);
context = getActivity();
geocoder = new Geocoder(context);
refreshButton = (ImageButton) view.findViewById(R.id.refreshButton);
refreshButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
getParkingsConnection = new GetParkingsConnection(context);
getParkingsConnection.execute(null, null, null);
myParkings = new ArrayList<Parking>();
}
});
// Geolocaliation
LocationManager service = (LocationManager) getActivity()
.getSystemService(getActivity().LOCATION_SERVICE);
boolean enabled = service
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// Check if enabled and if not send user to the GSP settings
// Better solution would be to display a dialog and suggesting to
// go to the settings
if (!enabled) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
// Get the location manager
locationManager = (LocationManager) getActivity().getSystemService(
getActivity().LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
return view;
}
private Double[] getLatAndLong(String addresse) {
List<Address> addresses = null;
Double latALng[] = new Double[2];
try {
addresses = geocoder.getFromLocationName(addresse, 1);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (addresses.size() > 0) {
double latitude = addresses.get(0).getLatitude();
double longitude = addresses.get(0).getLongitude();
latALng[0] = latitude;
latALng[1] = longitude;
}
return latALng;
}
private GetParkingsConnection getParkingsConnection;
JSONObject json;
// Non-Statice inner class : connection au serveur
private class GetParkingsConnection extends AsyncTask<String, Void, String> {
Context mContext;
private ProgressDialog mDialog;
GetParkingsConnection(Context context) {
mContext = context;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mDialog = new ProgressDialog(mContext);
mDialog.setMessage("Mise à jour de la carte...");
mDialog.show();
}
@Override
protected String doInBackground(String... urls) {
String resultat;
resultat = getParkings();
return resultat;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Log.d("JSON", result);
JSONArray jArray;
try {
json = new JSONObject(result);
jArray = json.getJSONArray("parking");
System.out.println("*****Parkings*****" + jArray.length());
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
Log.d("adresse :",
json_data.getString("adresse") + ", nom :"
+ json_data.getString("nom")
+ ", latitude :"
+ json_data.getDouble("latitude")
+ ", longitude :"
+ json_data.getDouble("longitude"));
String adresse = json_data.getString("adresse");
Double latALng[] = getLatAndLong(adresse);
Double lat = latALng[0]; // json_data.getDouble("latitude");
Double lng = latALng[1]; // json_data.getDouble("longitude");
String nom = json_data.getString("nom");
LatLng parkingLocation = new LatLng(lat, lng);
Marker parking = gMap.addMarker(new MarkerOptions()
.position(parkingLocation)
.title(nom)
.snippet(adresse)
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.my_marker)));
Parking park = new Parking(parking.getId(), adresse, nom,
"", lat, lng);
myParkings.add(park);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mDialog.dismiss();
}
// Fonction effectuant uenrequête de type GET sur le fichier
// getParking.php
protected String getParkings() {
HttpResponse response = null;
String res = "";
try {
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet();
// request.setURI(new
// URI("http://pkdom.1x.biz/getParkings.php"));
request.setURI(new URI(
"http://glennsonna.fr/webService/getParkings"));
response = client.execute(request);
HttpEntity entity = response.getEntity();
// JSONObject json = new JSONObject();
res = EntityUtils.toString(entity);
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return res;
}
}
@Override
public void onInfoWindowClick(Marker marker) {
// TODO Auto-generated method stub
Parking parkingToSend = null;
// TOAST
/*
* int p = 0;
*
* while(myParkings.get(p).idMarker != marker.getId() && p <
* myParkings.size()){ Log.d("Marker :" + marker.getId(),
* myParkings.get(p).idMarker);
*
* if(myParkings.get(p).idMarker.equals(marker.getId()) ){
* parkingToSend = myParkings.get(p); Context context =
* getApplicationContext(); CharSequence text = "Match" +
* parkingToSend.adresse; int duration = Toast.LENGTH_SHORT; Toast toast
* = Toast.makeText(context, text, duration); toast.show(); }
*
* p++; }
*/
for (int p = 0; p < myParkings.size(); p++) {
Log.d("Marker :" + marker.getId(), myParkings.get(p).idMarker);
if (myParkings.get(p).idMarker.equals(marker.getId())) {
parkingToSend = myParkings.get(p);
}
}
if (parkingToSend != null) {
Intent i = new Intent(context.getApplicationContext(),
ParkingDetail.class);
i.putExtra("id", parkingToSend.idMarker);
i.putExtra("adresse", parkingToSend.adresse);
i.putExtra("nom", parkingToSend.nom);
i.putExtra("descri", parkingToSend.description);
i.putExtra("latitude", parkingToSend.lat);
i.putExtra("longitude", parkingToSend.lng);
startActivity(i);
}
}
@Override
public void onLocationChanged(Location user) {
// TODO Auto-generated method stub
Log.d("Latitude", ":" + user.getLatitude());
Log.d("Longitude", ":" + user.getLongitude());
this.gMap.setMyLocationEnabled(true);
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
hide()＆amp; show()：我可以在片段之间切换，但第一个屏幕（地图）除外，所有其他屏幕都显示没有内容的空白屏幕。
私人MenuDrawer mMenuDrawer; 私人MenuAdapter mAdapter; 私人ListView mList; 私有GoogleMap gMap;
private int mActivePosition = -1;
List<Object> mmyFragment;
Fragment currentFragment;
myMapFragment mmyMapFragment;
myMonCompteFragment mmyMonCompteFragment;
myPaiementFragment mmyPaiementFragment;
myReservationsFragment mmyReservationsFragment;
myFavorisFragment mmyFavorisFragment;
myCodePromoFragment mmyCodePromoFragment;
myAboutFragment mmyAboutFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_my_map);
ActionBar actionBar = this.getActionBar();
actionBar.setSubtitle("Trouvez votre parking");
actionBar.setTitle("my");
actionBar.setDisplayHomeAsUpEnabled(true);
setupMenu();
setupFragments();
}
private void setupMenu() {
mMenuDrawer = MenuDrawer.attach(this, Position.LEFT);
mMenuDrawer.setContentView(R.layout.activity_my_map);
List<Object> items = new ArrayList<Object>();
items.add(new Item("Carte", R.drawable.ic_action_refresh_dark));
items.add(new Item("Mon Compte", R.drawable.ic_action_refresh_dark));
items.add(new Item("Paiement", R.drawable.ic_action_select_all_dark));
items.add(new Item("Mes Réservations",
R.drawable.ic_action_select_all_dark));
items.add(new Item("Mes favoris", R.drawable.ic_action_refresh_dark));
// items.add(new Category(" "));
items.add(new Item("Code Promo", R.drawable.ic_action_refresh_dark));
items.add(new Item("A propos", R.drawable.ic_action_select_all_dark));
// A custom ListView is needed so the drawer can be notified when it's
// scrolled. This is to update the position
// of the arrow indicator.
mList = new ListView(this);
mAdapter = new MenuAdapter(items);
mList.setAdapter(mAdapter);
mList.setOnItemClickListener(mItemClickListener);
mMenuDrawer.setMenuView(mList);
}
private void setupFragments() {
mmyMapFragment = new myMapFragment();
mmyMonCompteFragment = new myMonCompteFragment();
mmyPaiementFragment = new myPaiementFragment();
mmyReservationsFragment = new myReservationsFragment();
mmyFavorisFragment = new myFavorisFragment();
mmyCodePromoFragment = new myCodePromoFragment();
mmyAboutFragment = new myAboutFragment();
mmyFragment = new ArrayList<Object>();
mmyFragment.add(mmyMapFragment);
mmyFragment.add(mmyMonCompteFragment);
mmyFragment.add(mmyPaiementFragment);
mmyFragment.add(mmyReservationsFragment);
mmyFragment.add(mmyFavorisFragment);
mmyFragment.add(mmyCodePromoFragment);
mmyFragment.add(mmyAboutFragment);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(R.id.myContenu, mmyMapFragment);
fragmentTransaction.commit();
currentFragment = mmyMapFragment;
}
private AdapterView.OnItemClickListener mItemClickListener = new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
mActivePosition = position;
mMenuDrawer.setActiveView(view, position);
mMenuDrawer.closeMenu();
if ((mmyFragment.get(position) != null)
/*&& (mmyFragment.get(position).getClass() != currentFragment
.getClass())*/) {
Fragment nexFragment = (Fragment) mmyFragment
.get(position);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.setCustomAnimations(android.R.anim.fade_in,
android.R.anim.fade_out);
fragmentTransaction.hide(currentFragment);
if (!nexFragment.isHidden()) {
//fragmentTransaction.add(nexFragment, nexFragment.getTag());
Toast.makeText(
getApplicationContext(),
""
+ nexFragment.getClass().toString()
+ " : "
+ mmyFragment.indexOf(mmyFragment
.get(position)), Toast.LENGTH_SHORT).show();
}
//fragmentTransaction.addToBackStack(nexFragment.getTag());
fragmentTransaction.attach(nexFragment);
fragmentTransaction.replace(R.id.myContenu, nexFragment);
//fragmentTransaction.show(nexFragment);
currentFragment = nexFragment;
fragmentTransaction.commit();...}
一天后，我最终找到了答案here
所以我刚刚实现了以下代码。但是我必须使用replace();，所以我会找到一种方法来保存我的地图状态。
public void onDestroyView ()
{
try{
SupportMapFragment fragment = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}catch(Exception e){
}
super.onDestroyView();
}