CODEWITHSUNDEEP
androidarraylist
user2843350
user2843350

Reputation:

How to store parseobject data in an arraylist

Here I trying to store all eventLatitude, eventLongitude in arrayLists:

(plz look in to image)

I tried so far:

 `ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
                        "GreenMarkers");
                 query.orderByDescending("_created_at");
                 try {
                        ob = query.find();
                    } catch (ParseException e) {
                        Log.e("Error", e.getMessage());
                        e.printStackTrace();
                    }
                 for (ParseObject greenmarkers : ob) {
                        eventLatitudeList.add((String) greenmarkers.get("eventLatitude"));
                        eventLongitudeList.add((String) greenmarkers.get("eventLongitude"));

                    }`

but it is not working getting error in storing values in arraylist logs

   10-10 17:22:25.021: E/AndroidRuntime(21178): FATAL EXCEPTION: main
10-10 17:22:25.021: E/AndroidRuntime(21178): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tukutane/com.tukutane.StartActivity}: java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.String
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2114)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2139)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread.access$700(ActivityThread.java:143)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.os.Looper.loop(Looper.java:137)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread.main(ActivityThread.java:4960)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at java.lang.reflect.Method.invokeNative(Native Method)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at java.lang.reflect.Method.invoke(Method.java:511)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at dalvik.system.NativeStart.main(Native Method)
10-10 17:22:25.021: E/AndroidRuntime(21178): Caused by: java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.String
10-10 17:22:25.021: E/AndroidRuntime(21178):    at com.tukutane.StartActivity.onCreate(StartActivity.java:131)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.Activity.performCreate(Activity.java:5203)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
10-10 17:22:25.021: E/AndroidRuntime(21178):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2078)

i think the way i am getting all eventLatitude,eventLongitude values and storing is incorrect,help me .

Upvotes: 0

Views: 1666

Answers (2)

user2866940
user2866940

Reputation:

The problem is that ParseObject stores the value as an Object. So you are trying to cast a Double to a String. Normally the IDE warns you for this. Now this happens:

Object sneakyDouble = (Double)0.4d;
String s = (String)sneakyDouble;

How do you solve it? Just use:

eventLatitudeList.add(greenmarkers.get("eventLatitude").toString());
eventLongitudeList.add(greenmarkers.get("eventLongitude").toString());

Upvotes: 1

Sagar Maiyad
Sagar Maiyad

Reputation: 12733

Convert your double value to String and then store into arraylist. Or simply make arraylist of double for storing all double values of latitude and longitude.

example 1:

String lat = String.valueOf(doublevalue);
ArrayList<String> latlist = new ArrayList<String>();
latlist.add(lat);

example 2:

ArrayList<double> latlist = new ArrayList<double>();
latlist.add(doublevalue);

Upvotes: 2

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