我已根据this问题的接受答案指导ActionBarSherlock SupportMapFragment。一切都很好。但唯一的问题是onOptionsItemSelected方法被调用两次。这是代码 -
@Override
public boolean onOptionsItemSelected(
com.actionbarsherlock.view.MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation:
Log.d("tag","text");
break;
}
return super.onOptionsItemSelected(item);
}
编辑 -
这是我的整个FragmentMaps课程：
package com.vishalaksh.technex;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.actionbarsherlock.view.MenuItem;
import com.actionbarsherlock.view.SubMenu;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.CancelableCallback;
import com.google.android.gms.maps.UiSettings;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.vishalaksh.technex.db.DatabaseHelper;
import com.vishalaksh.technex.db.DbConstants;
import com.vishalaksh.technex.utils.Constants;
import com.vishalaksh.technex.utils.JSONconstants;
import com.vishalaksh.technex.utils.MapConstants;
import com.vishalaksh.technex.utils.SherlockMapFragment;
public class FragmentMaps extends SherlockMapFragment implements MapConstants,
Constants, DbConstants, JSONconstants {
private GoogleMap mMap;
private static final int VIEW = 0;
DatabaseHelper db;
public FragmentMaps() {
super();
}
public static FragmentMaps newInstance() {
FragmentMaps frag = new FragmentMaps();
return frag;
}
@Override
public View onCreateView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2) {
View v = super.onCreateView(arg0, arg1, arg2);
db = new DatabaseHelper(getActivity());
setUpMapIfNeeded();
return v;
}
public void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the
// map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
UiSettings settings = mMap.getUiSettings();
settings.setAllGesturesEnabled(true);
settings.setMyLocationButtonEnabled(true);
mMap.setMyLocationEnabled(true);
mMap.moveCamera(CameraUpdateFactory.newCameraPosition(BHU_position));
GoToIITBHU();
/*
* the following block shifted to onresume() if
* (getActivity().getComponentName().getClassName()
* .equalsIgnoreCase(Activity_msg_map.class.getName())) { //
* Activity_msg_map setupMsgMap(); } else { // activity main
* setupMain(); setHasOptionsMenu(true); }
*/
}
@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (mMap != null) {
if (getActivity().getComponentName().getClassName()
.equalsIgnoreCase(Activity_msg_map.class.getName())) {
// Activity_msg_map
setupMsgMap();
} else {
// activity main
setupMain();
setHasOptionsMenu(true);
}
}
}
private boolean checkReady() {
if (mMap == null) {
Toast.makeText(getActivity(), R.string.map_not_ready,
Toast.LENGTH_SHORT).show();
return false;
}
return true;
}
@Override
public void onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu,
com.actionbarsherlock.view.MenuInflater inflater) {
// menu.add(VIEW, VIEW_PLACES_MENU_ITEM, 0,
// "View Places").setShowAsAction(
// MenuItem.SHOW_AS_ACTION_ALWAYS|MenuItem.SHOW_AS_ACTION_WITH_TEXT);
// menu.add(VIEW, VIEW_EVENTS_MENU_ITEM, 0,
// "View Events").setShowAsAction(
// MenuItem.SHOW_AS_ACTION_ALWAYS|MenuItem.SHOW_AS_ACTION_WITH_TEXT);
menu.clear();
SubMenu optionsMenu = menu.addSubMenu("View");
optionsMenu.add(VIEW, VIEW_PLACES_MENU_ITEM, 0, "View Places");
optionsMenu.add(VIEW, VIEW_EVENTS_MENU_ITEM, 1, "View Events");
// TODO import mdpi n other resources
MenuItem subMenu1Item = optionsMenu.getItem();
subMenu1Item.setIcon(R.drawable.ic_action_view).setShowAsAction(
MenuItem.SHOW_AS_ACTION_ALWAYS
| MenuItem.SHOW_AS_ACTION_WITH_TEXT);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(
com.actionbarsherlock.view.MenuItem item) {
switch (item.getItemId()) {
case VIEW_PLACES_MENU_ITEM:
Toast.makeText(getActivity(), EXTRA_EVENT_CATEGORY, Toast.LENGTH_SHORT).show();//This toast is displayed two times.
// TODO clear markers if any
clearmarkers();
// TODO put place markers
PreferenceManager.getDefaultSharedPreferences(getActivity()).edit()
.putInt(PREF_MAP_VIEW, VIEW_LOC).commit();
putLocationMarkers();
break;
case VIEW_EVENTS_MENU_ITEM:
// TODO clear markers if any
clearmarkers();
// TODO put event markers
PreferenceManager.getDefaultSharedPreferences(getActivity()).edit()
.putInt(PREF_MAP_VIEW, VIEW_EVENT).commit();
putEventMarkers();
break;
}
return super.onOptionsItemSelected(item);
}
private void putEventMarkers() {
// get all the locations which have events
Cursor cLocation = db.getReadableDatabase().query(tableEventsName,
new String[] { colForeignLocationsNameTableEvent }, null, null,
colForeignLocationsNameTableEvent, null, null);
if (cLocation.getCount() == 0) {
Log.d(TAG, "cLocation.getCount()==0");
return;
} else {
Log.d(TAG, "total " + cLocation.getCount()
+ " locations found having events...");
}
cLocation.moveToFirst();
do {
// get each location name
String location = cLocation.getString(cLocation
.getColumnIndexOrThrow(colForeignLocationsNameTableEvent));
// get the details of this location
Cursor cLocationDetails = db.getReadableDatabase().query(
tableLocationsName, null, colNameTableLocations + " =? ",
new String[] { location }, null, null, null);
if (cLocationDetails.getCount() != 1) {
Log.w(TAG,
"no. of locations in cursor cLocationDetails in FragmentMaps is not 1!, its:"
+ cLocationDetails.getCount());
}
cLocationDetails.moveToFirst();
double lat = cLocationDetails.getDouble(cLocationDetails
.getColumnIndexOrThrow(colLatTableLocations));
double lng = cLocationDetails.getDouble(cLocationDetails
.getColumnIndexOrThrow(colLongTableLocations));
String title = cLocationDetails.getString(cLocationDetails
.getColumnIndexOrThrow(colNameTableLocations));
// get list of events for a particular location
Cursor cEvent = db.getReadableDatabase().query(tableEventsName,
null, colForeignLocationsNameTableEvent + " =? ",
new String[] { location }, null, null, null);
if (cEvent.getCount() == 0) {
Log.e(TAG, "no events found for the location:" + location);
/*
* mMap.addMarker(new MarkerOptions().position( new LatLng(lat,
* lng)).title(title));
*/} else {
cEvent.moveToFirst();
StringBuilder sb = new StringBuilder();
do {
sb.append(cEvent.getString(cEvent
.getColumnIndexOrThrow(colEventNameTableEvent)));
sb.append(DELIMITER_SNIPPET);
} while (cEvent.moveToNext());
// delete last delimiter
sb.delete(sb.lastIndexOf(DELIMITER_SNIPPET), sb.length() - 1);
String snippet = sb.toString();
mMap.addMarker(new MarkerOptions()
.position(new LatLng(lat, lng))
.title(getCorrectTitle(title))
.snippet(snippet)
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
}
} while (cLocation.moveToNext());
}
private void putLocationMarkers() {
/*
* Cursor c = db.getReadableDatabase().query(tableLocationsName, null,
* null, null, null, null, null);
*/
Cursor c = db.getReadableDatabase().rawQuery(
"SELECT * FROM " + tableLocationsName + " WHERE "
+ colTrivialtableLocations + " !=?",
new String[] { String.valueOf(TRIVIAL) });
if (c.getCount() == 0) {
Log.e(TAG, "cursor doesnt contain locations in FragmentMaps");
return;
}
c.moveToFirst();
do {
double lat = c.getDouble(c
.getColumnIndexOrThrow(colLatTableLocations));
double lng = c.getDouble(c
.getColumnIndexOrThrow(colLongTableLocations));
String title = c.getString(c
.getColumnIndexOrThrow(colNameTableLocations));
String snippet = c.getString(c
.getColumnIndexOrThrow(colSnippetTableLocations));
mMap.addMarker(new MarkerOptions()
.position(new LatLng(lat, lng))
.title(getCorrectTitle(title))
.snippet(snippet)
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
} while (c.moveToNext());
}
@Override
public void onDestroy() {
if (db != null) {
db.close();
}
super.onDestroy();
}
private void clearmarkers() {
mMap.clear();
}
private void setupMain() {
clearmarkers();
if (PreferenceManager.getDefaultSharedPreferences(getActivity())
.getInt(PREF_MAP_VIEW, VIEW_LOC) == VIEW_LOC) {
putLocationMarkers();
} else {
putEventMarkers();
}
}
private void setupMsgMap() {
String locname = getActivity().getIntent().getStringExtra(
EXTRA_UPDATE_LOC);
Log.d(TAG, "the location received by map is:" + locname);
/*
* Cursor c = db.getReadableDatabase().query(tableLocationsName, null,
* colNameTableLocations + "=?", new String[] { locname }, null, null,
* null);
*/
Cursor c = db.getReadableDatabase().rawQuery(
"SELECT * FROM " + tableLocationsName + " WHERE "
+ colNameTableLocations + "=? LIMIT 1",
new String[] { locname });
if (c.getCount() != 1) {
Log.e(TAG,
"cursor doesnt contain single location in FragmentMaps it contains:"
+ c.getCount());
return;
}
c.moveToFirst();
double lat = c.getDouble(c.getColumnIndexOrThrow(colLatTableLocations));
double lng = c
.getDouble(c.getColumnIndexOrThrow(colLongTableLocations));
String title = c.getString(c
.getColumnIndexOrThrow(colNameTableLocations));
mMap.addMarker(new MarkerOptions()
.position(new LatLng(lat, lng))
.title(getCorrectTitle(title))
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW)));
}
/**
* Called when the Go To Bondi button is clicked.
*/
void GoToIITBHU() {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.newCameraPosition(IITBHU));
}
private void changeCamera(CameraUpdate update) {
changeCamera(update, null);
}
/**
* Change the camera position by moving or animating the camera depending on
* the state of the animate toggle button.
*/
private void changeCamera(CameraUpdate update, CancelableCallback callback) {
// boolean animated = ((CompoundButton)
// findViewById(R.id.animate)).isChecked();
if (true) {
mMap.animateCamera(update, callback);
} else {
mMap.moveCamera(update);
}
}
private String getCorrectTitle(String title) {
if (title.equalsIgnoreCase(SBGround.NAME)) {
return "Swatantrata Bhavan Ground";
} else if (title.equalsIgnoreCase(SB.NAME)) {
return "Swatantrata Bhavan";
} else {
return title;
}
}
}
答案 0 :(得分：3)
在onOptionsItemSelected方法中，不要在最后调用超类方法
return super.onOptionsItemSelected(item);
而是返回true。
@Override
public boolean onOptionsItemSelected(
com.actionbarsherlock.view.MenuItem item) {
switch (item.getItemId()) {
case VIEW_PLACES_MENU_ITEM:
Toast.makeText(getActivity(), EXTRA_EVENT_CATEGORY, Toast.LENGTH_SHORT).show();//This toast is displayed two times.
// TODO clear markers if any
clearmarkers();
// TODO put place markers
PreferenceManager.getDefaultSharedPreferences(getActivity()).edit()
.putInt(PREF_MAP_VIEW, VIEW_LOC).commit();
putLocationMarkers();
break;
case VIEW_EVENTS_MENU_ITEM:
// TODO clear markers if any
clearmarkers();
// TODO put event markers
PreferenceManager.getDefaultSharedPreferences(getActivity()).edit()
.putInt(PREF_MAP_VIEW, VIEW_EVENT).commit();
putEventMarkers();
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
答案 1 :(得分：0)
替换
return super.onOptionsItemSelected(item);
与
return true;
并且不要在onOptionsItemSelected中进行超级调用。 我希望这对你也有用。