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Android Android Lists and Adapters (2015) Standard ListViews Using an ArrayAdapter

Posted by Adlight Sibanda
Adlight Sibanda
5,701 Points

android lists and adapters

Inside the onCreate() method, declare an ArrayAdapter named adapter and initialize it with its constructor. Remember that ArrayAdapter is a generic, meaning that the type of the items in the array needs to be specified in angle brackets. The constructor takes three parameters: 1) the context (use this), 2) the layout (use android.R.layout.simple_list_item_1) and 3) the array to adapt (use mApps).

AppListActivity.java 
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;

public class AppListActivity extends ListActivity {

    String[] mApps = {"Instagram","Pinterest","Pocket","Twitter" }; 
ArrayAdapteradapter=new ArrayAdapter(this android.R.layout.simple_list_item_1, mApps); 
setListAdapter(adapter);

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_app_list);
    }
}
Adlight Sibanda
Adlight Sibanda
5,701 Points

Challenge Task 2 of 2

Set adapter as the default adapter for AppListActivity using the setListAdapter() method, which takes an adapter as a parameter.

2 Answers

Nicolas Hampton
Nicolas Hampton
44,638 Points
Nicolas Hampton
Nicolas Hampton
44,638 Points

Set the name of the ArrayAdapter to 'adapter'. Adapters are just like any other object, each instance needs a name of it's own.

Nicolas Hampton
Nicolas Hampton
44,638 Points

oh, I see. You did that, but there's no space in between.

Nicolas Hampton
Nicolas Hampton
44,638 Points

also, that all goes in the onCreate method.

Nicolas Hampton
Nicolas Hampton
44,638 Points

Leave the array declaration where it's at, but set it to private as well.

Adlight Sibanda
Adlight Sibanda
5,701 Points

it worked, i appreceate ;-)

Nicolas Hampton
Nicolas Hampton
44,638 Points

I do what I can. Take care!

MUZ140663 Question Ngwarati
MUZ140663 Question Ngwarati
11,782 Points
MUZ140663 Question Ngwarati
MUZ140663 Question Ngwarati
11,782 Points

import android.app.ListActivity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter;

public class AppListActivity extends ListActivity {

String[] mApps = {"Instagram","Pinterest","Pocket","Twitter" };

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this android.R.layout.simple_list_item_1, mApps); setListAdapter(adapter); } }

MUZ140663 Question Ngwarati
MUZ140663 Question Ngwarati
11,782 Points

<String> between ArrayAdapter<String> adapter