我希望将数组对象添加到我创建的ParseObject中，但是在我的应用程序上执行操作时，logCat会收到以下错误：
08-04 15:06:26.466 18982-18982/com.khackett.runmate E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.khackett.runmate, PID: 18982
java.lang.IllegalArgumentException: invalid type for ParseObject: class com.google.android.gms.maps.model.LatLng
at com.parse.ParseEncoder.encode(ParseEncoder.java:141)
at com.parse.ParseEncoder.encode(ParseEncoder.java:101)
at com.parse.ParseJSONCacheItem.<init>(ParseJSONCacheItem.java:15)
at com.parse.ParseObject.addToHashedObjects(ParseObject.java:647)
at com.parse.ParseObject.checkpointMutableContainer(ParseObject.java:1348)
at com.parse.ParseObject.performOperation(ParseObject.java:3121)
at com.parse.ParseObject.addAll(ParseObject.java:3215)
at com.khackett.runmate.RouteRecipientsActivity.createRoute(RouteRecipientsActivity.java:219)
at com.khackett.runmate.RouteRecipientsActivity.onOptionsItemSelected(RouteRecipientsActivity.java:166)
at android.app.Activity.onMenuItemSelected(Activity.java:2885)
at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1133)
at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:761)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:904)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:894)
at android.widget.ActionMenuView.invokeItem(ActionMenuView.java:587)
at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:141)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
RouteRecipientsActivity的类是：
package com.khackett.runmate;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.google.android.gms.maps.model.LatLng;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;
import com.parse.ParseRelation;
import com.parse.ParseUser;
import com.parse.SaveCallback;
import java.util.ArrayList;
import java.util.List;
public class RouteRecipientsActivity extends ListActivity {
public static final String TAG = RouteRecipientsActivity.class.getSimpleName();
// set up a reference to the current user
protected ParseUser mCurrentUser;
// set up a member variable to store a list of friends for the current user returned from the parse user query
protected List<ParseUser> mFriends;
// set up a ParseRelation member to hold ParseUsers
protected ParseRelation<ParseUser> mFriendsRelation;
// create a menu item member variable so that it can be referenced below (it is a send button to be set on and off depending on if a user is selected)
// set this variable in the onCreateOptionsMenu
protected MenuItem mSendMenuItem;
// member variable to represent the array of LatLng values passed into this activity via the intent that started it
protected ArrayList<LatLng> markerPoints;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.activity_route_recipients);
// line to ensure the action bar displays in the layout
// ((AppCompatActivity) getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
getActionBar().setDisplayHomeAsUpEnabled(true);
// the list view keeps track of items that are selected (this is the check property on each item)
// loop through the list to see who is checked - do this when we are ready to send
// get the default list view associated with this activity
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); // we can now check and uncheck multiple friends
// get the array of LatLng points passed in from the map intent
markerPoints = getIntent().getParcelableArrayListExtra("markerPoints");
}
// get a list of all your friends - this code is copied from the onResume() method in the FriendsFragment with some additions
@Override
public void onResume() {
super.onResume();
// get the current user using the getCurrentUser() method
mCurrentUser = ParseUser.getCurrentUser();
// for the relation, from this user we want to call a method called getRelation()
mFriendsRelation = mCurrentUser.getRelation(ParseConstants.KEY_FRIENDS_RELATION);
// start the progress indicator before we run our query
// use the getActivity() to get a reference to the activity in which the fragment is running (as setProgressBarIndeterminateVisibility() is an Activity method)
// note: Window provided Progress Bars are now deprecated with Toolbar.
// see: http://stackoverflow.com/questions/27788195/setprogressbarindeterminatevisibilitytrue-not-working
// getActivity().setProgressBarIndeterminateVisibility(true);
// the first thing we need is a list of the users friends...
// we have the friend relation, but this doesn't give us a list of users to work with
// the list itself is still on the back end, we need to use the ParseRelation to retrieve it
// use the build in query to retrieve it - this gets us the query associated with this ParseRelation
ParseQuery<ParseUser> query = mFriendsRelation.getQuery();
// sort the list by username before calling it
query.addAscendingOrder(ParseConstants.KEY_USERNAME);
query.findInBackground(new FindCallback<ParseUser>() {
@Override
public void done(List<ParseUser> friends, ParseException e) {
// getActivity().setProgressBarIndeterminateVisibility(false);
// include an if statement to check the exception
if (e == null) {
// set the mFriends variable based on the list of friends that is returned
mFriends = friends;
// now we need to use mFriends as the data source for the list view in our fragments
// we need to create an adapter and set it as the list adapter, just like we do for lost activities
// this is very similar to what we are ding for all users in the EditFriends activity, so copy and paste that code
// create an array of strings to store the usernames and set the size equal to that of the list returned
String[] usernames = new String[mFriends.size()];
// enhanced for loop to go through the list of parse users and create an array of usernames
int i = 0;
for (ParseUser user : mFriends) {
usernames[i] = user.getUsername();
i++;
}
// create an array adapter and set it as the adapter for this activity
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
// for the first parameter here, need to get the context of a fragment through the list view itself
// the list view knows which context it is in because of its layout in the fragment and in the activity that contains the fragment, so use...
getListView().getContext(),
android.R.layout.simple_list_item_checked,
usernames);
// need to call setListAdapter for this activity. This method is specifically from the ListActivity class
setListAdapter(adapter);
} else {
// display a message to the user (copied from EditFriendsActivity)
// there was an error - log the message
Log.e(TAG, e.getMessage());
// display an alert to the user
// if there is a parse exception then...
AlertDialog.Builder builder = new AlertDialog.Builder(RouteRecipientsActivity.this);
// set the message from the exception
builder.setMessage(e.getMessage())
.setTitle(R.string.error_title)
.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_route_recipients, menu);
// once the menu is inflated, we can can get a menu item object using the getItem() method of the menu that is passed in
// use the int parameter to specify its position in the menu - since we only have 1 item, it will be at position 0
mSendMenuItem = menu.getItem(0);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} else if (id == R.id.action_send) {
// create a parse object for our message
ParseObject route = createRoute();
// the message variable will be null if something goes wrong
// so we only want to call the send() method if it is not null
if (route == null) {
// display error message
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(R.string.error_selecting_file)
.setTitle(R.string.error_selecting_file_title)
.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
} else {
// create a send message that will accept the message as a parameter
send(route);
// In either case, we want to send the user back to the main activity right after the message is sent.
// Use the activity method finish() to close the activity - this finishes the current activity and the
// the previous activity (main activity) will be displayed in the message once again
finish();
}
return true;
}
return super.onOptionsItemSelected(item);
}
// change the visibility of the send button (set in menu_recipients.xml) whenever a a friend is selected
// we create the menu in onCreateOptionsMenu
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
// check the number of items that are checked on the list
if (l.getCheckedItemCount() > 0) {
// set the menuItem to visible if an item is clicked
mSendMenuItem.setVisible(true);
} else {
// otherwise, if it is 0, then hide the menu item
mSendMenuItem.setVisible(false);
}
// add a listener for the send button
// menu items fire the onOptionsItemSelected() method (such as the home button)
}
protected ParseObject createRoute() {
// create a new parse object called route
// (we can create a whole new class of parse objects in the back end by simply using a new name)
ParseObject route = new ParseObject(ParseConstants.CLASS_ROUTES);
route.addAll(ParseConstants.KEY_LATLNGPOINTS, markerPoints);
// now that we have an object, we can start adding data, using the key-value pairs...
// first, get a String representation of the ID
route.put(ParseConstants.KEY_SENDER_IDS, ParseUser.getCurrentUser().getObjectId());
// put the senders name
route.put(ParseConstants.KEY_SENDER_NAME, ParseUser.getCurrentUser().getUsername());
// put the recipient ID's
// get the selected friends from the list through the helper method getRecipientIds()
route.put(ParseConstants.KEY_RECIPIENT_IDS, getRecipientIds());
// return a successful route
return route;
}
/**
* method to return a collection of ID's
*
* @return
*/
protected ArrayList<String> getRecipientIds() {
ArrayList<String> recipientIds = new ArrayList<String>();
// iterate though each user in the list
for (int i = 0; i < getListView().getCount(); i++) {
// if the user is checked on the recipients list
if (getListView().isItemChecked(i)) {
// add their ID to the array list
recipientIds.add(mFriends.get(i).getObjectId());
}
}
return recipientIds;
}
// method that uploads a file to the backend where recipients will be able to check for it
protected void send(ParseObject route) {
route.saveInBackground(new SaveCallback() {
@Override
public void done(ParseException e) {
if (e == null) {
// successful
Toast.makeText(RouteRecipientsActivity.this, R.string.success_message, Toast.LENGTH_LONG).show();
} else {
// there is an error - notify the user so they don't miss it
AlertDialog.Builder builder = new AlertDialog.Builder(RouteRecipientsActivity.this);
builder.setMessage(R.string.error_sending_message)
.setTitle(R.string.error_selecting_file_title)
.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
}
}
});
}
}
包含LatLng值的数组排列如下： [lat / lng：（54.58534930540805，-5.933924429118633），lat / lng：（54.587550929128106，-5.9355418011546135），lat / lng：（54.58754451793631，-5.93791488558054）]
有人能看到我在哪里错了吗？
答案 0 :(得分：1)
Parse不知道LatLng是什么，您需要在ArrayList中使用名为ParseGeoPoint的特定于解析的对象，或者在保存时将所有LatLng转换为它们