The constructor ArrayAdapter<String>(AddNewUnit, int, String) is undefined

Question

I'm new to android and Java and I faced this problem and I search for answer but I don't find any thing.

I'm trying to get some data from database and put it in spinner but I faced this problem:

The constructor ArrayAdapter(AddNewUnit, int, String) is undefined

this is my code:

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;

public class AddNewUnit extends Activity implements OnItemSelectedListener {

EditText UnitName;
Spinner BookName;
DataBase dataBase;
String[][] Books;
String BookId;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.add_new_unit);
    UnitName = (EditText) findViewById(R.id.ANU_EtUnitName);
    BookName = (Spinner) findViewById(R.id.ANU_SBookName);
    dataBase.open();
    Books = dataBase.Get_Books();
    dataBase.close();
    ArrayAdapter<String> adapter =new ArrayAdapter<String>(AddNewUnit.this, android.R.layout.simple_spinner_item, Books[1][]);
    BookName.setAdapter(adapter);
    BookName.setOnItemSelectedListener(this);
}
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
        long arg3) {
    // TODO Auto-generated method stub
    BookId=Books[0][BookName.getSelectedItemPosition()];
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub

}


}

My problem is with this line

ArrayAdapter<String> adapter =new ArrayAdapter<String>(AddNewUnit.this, android.R.layout.simple_spinner_item, Books[1][]);

I searched and found that most mistakes is with context when they write this but I write AddNewUnit.this which is my activity.

what's the mistake I do it?

More details:

I'm sorry this is the first time to use java I used c++ before and in c++ I use Books[1][] to transform array from multidimensional to single-dimension it just get the row number 1 from the array.

This string it has two rows one for Book ID and one for Book name I want to pass just the Book name which is the row 1.

Is there any way to do that or I must use custom ArrayAdapter?

Will you please try with just passing String[]. I mean your problem can be at Books[1][]; Will you just create an array constant and pass and see it works or not — Brijesh Thakur
– Brijesh Thakur, Commented Jul 15, 2013 at 4:25

Community · Accepted Answer · 2017-05-23 11:58:32Z

1

The constructor used is undefined.

public ArrayAdapter (Context context, int resource, int textViewResourceId, T[] objects)

Added in API level 1

Constructor

Parameters

context The current context.

resource    The resource ID for a layout file containing a layout to use when instantiating views.

textViewResourceId  The id of the TextView within the layout resource to be populated

objects The objects to represent in the ListView.

http://developer.android.com/reference/android/widget/ArrayAdapter.html#ArrayAdapter(android.content.Context, int, T[])

You have this

 ArrayAdapter<String> adapter =new ArrayAdapter<String>(AddNewUnit.this, android.R.layout.simple_spinner_item, Books[1][]);  // params wrong

Use a Custom Listview with custom adapter along with a view holder.

Override getCount and getView

How to Display two dimensional Array in ListView?

edited May 23, 2017 at 11:58

CommunityBot

11 silver badge

answered Jul 15, 2013 at 4:40

Raghunandan

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Comments

Tarsem Singh · Accepted Answer · 2013-07-15 04:27:58Z

0

i think you will have to use custom adapter for Books[1][] because its multi dimensional ! so use custom Adapter and override getView()

answered Jul 15, 2013 at 4:27

Tarsem Singh

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Comments

IronBlossom · Accepted Answer · 2013-07-15 05:00:57Z

0

ArrayAdapter<String> adapter =new ArrayAdapter<String>(AddNewUnit.this, android.R.layout.simple_spinner_item, Books[1][]);

ArrayAdapter doesn't have any constructor that receives 2D array. Try extending BaseAdapter and create your own custom adapter.

public class YourCustomAdapter extends BaseAdapter{

String[][] your2Darray;

//Here's your constructor
public YourCustomAdapter(Context c,int layoutId,int resourceId, String[][] you2Darray){
        this.your2Darray=your2Darray;
....
      }
}....

Override getCount() and getView().

answered Jul 15, 2013 at 5:00

IronBlossom

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Comments

Pulkit Sethi · Accepted Answer · 2015-06-16 12:38:11Z

-1

You have Set the T type to be string and then you pass set of Book type objects, you need to change the String to "your data class"

edited Jun 16, 2015 at 12:38

answered Jul 15, 2013 at 4:26

Pulkit Sethi

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2 Comments

M D Over a year ago

This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.

Pulkit Sethi Over a year ago

Sorry boss rich formatting removed the text between "<>"

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