Android - How to set value of ArrayList to TextView

Question

i have a problem here. I've ArrayList from the result of my parser class. then i wanna put that value (value from ArrayList) to TextView.

here is the work i've done till now. I create TextView on my main.xml

<TextView android:id="@+id/deskripsi" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" />

and here at my onCreate Method, i initialized the Text View

desk = (TextView)findViewById(R.id.deskripsi);

and then i tried to parser the KML document from google map and at the Node Placemark i put its value to ArrayList, here my code

ArrayList<String> pathName = new ArrayList<String>(); Object[] objPlace; //Parser Node Placemark NodeList nlPlace = doc.getElementsByTagName("Placemark"); for(int p = 0; p < nlPlace.getLength(); p++){ Node rootPlace = nlPlace.item(p); NodeList itemPlace = rootPlace.getChildNodes(); for(int y = 0; y < itemPlace.getLength(); y++){ Node placeStringNode = itemPlace.item(y); NodeList place = placeStringNode.getChildNodes(); //valueName = nameList.item(0).getNodeValue().toString() + "+"; pathName.add(place.item(0).getNodeValue()); } } objPlace = pathName.toArray(); desk.setText(""); for (int j = 0; j < objPlace.length; j++){ desk.append("Deskripsi:\n" + objPlace[j].toString() + "\n"); }

but when itried to run its to my emulator and real device, i get an error. here's my LogCat enter image description here

please help me, and sorry for my english >_<

which line in this code is 107

Ron
– Ron

2012-05-19 12:25:35 +00:00
Commented May 19, 2012 at 12:25 — Ron
– Ron, Commented May 19, 2012 at 12:25
Why do u put the arraylist to object[]?

Ron
– Ron

2012-05-19 12:27:12 +00:00
Commented May 19, 2012 at 12:27 — Ron
– Ron, Commented May 19, 2012 at 12:27

Ron · Accepted Answer · 2012-05-19 12:30:23Z

You can do this instead; use pathName directly in the for loop...

desk.setText(""); for (int j = 0; j < pathName.size(); j++){ desk.append("Deskripsi:\n" + pathName.get(j) + "\n"); }

Khan · Accepted Answer · 2012-05-19 12:47:02Z

you can put the line

 objPlace[] = new Object[pathName.size()]

before

objPlace = pathName.toArray();

and check output otherwise do this way

 desk.setText(""); for (int j = 0; j < pathName.size(); j++){ desk.append("Deskripsi:\n" + pathName.get(j) + "\n"); }

Barak · Accepted Answer · 2012-05-19 12:32:58Z

You never initialize your array... objPlace[] is a null array.

You need to do something like:

objPlace[] = new Object[arraysizenumber]

Blackbelt · Accepted Answer · 2012-05-19 12:37:10Z

0

Ii is caused by NullPointerException, that means some needs parameters and you have passed a null value to it. Based on your code it might be around desk.setText("");. Try inserting a space or some value into it and run.

edited May 19, 2012 at 12:37

Blackbelt

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answered May 19, 2012 at 12:32

flameaddict

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2 Comments

V.J. Over a year ago

He got RunTimeException not NullPointerException

Barak Over a year ago

To quote the error posted above "Caused by: java.lang.NullPointerException"

DevYudh · Accepted Answer · 2012-05-19 12:55:20Z

Thanks my fren. im still not really well on using Object[]. then i used this code for solving my problem

String strPlace[] = (String[])pathName.toArray(new String[pathName.size()]); desk.setText(""); for (int j = 0; j < strPlace.length; j++){ desk.append("Deskripsi:\n" + strPlace[j] + "\n"); }

Thanks for userSeven7s, flameaddict and khan for trying to help me. nice to know u all :)

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