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Android

Posted by Dennis Dee
Dennis Dee
1,306 Points

Adding Secondary Data with a SimpleAdapter task 3

I am pretty lost on the Array being specified in this task.Now create a SimpleAdapter variable. It's constructor has 5 parameters. 1. The context (use 'this'). 2. The array to be adapted. 3. The layout for each item (use 'android.R.layout.simple_list_item_2'). 4. An array of keys needed to map values (use the 'keys' array). 5. An array of int IDs where the values are placed (use the 'ids' array). Everything seems pretty straight forward except I cannot seem to be able to find out the array to be adapted. Any help would be appreciated, here are the lines of code in question.

        String[] keys = { KEY_NAME, KEY_URL };
    int[] ids = { android.R.id.text1, android.R.id.text2 };
  SimpleAdapter = new SimpleAdapter(this,websites,android.R.layout.simple_list_item_2,keys,ids);

4 Answers

Dennis Dee
Dennis Dee
1,306 Points
Dennis Dee
Dennis Dee
1,306 Points 
import android.os.Bundle;
import android.widget.SimpleAdapter;

public class WebsiteListActivity extends ListActivity {

  public static final String KEY_NAME = "name";
    public static final String KEY_URL = "url";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_website_list);

        String[] keys = { KEY_NAME, KEY_URL };
        int[] ids = { android.R.id.text1, android.R.id.text2 };
      SimpleAdapter = new SimpleAdapter(this,websites,android.R.layout.simple_list_item_2,keys,ids);


        final HashMap<String, String> mName = new HashMap<String, String>();
        final HashMap<String, String> mUrl = new HashMap<String, String>();

        mName.put(KEY_NAME, "Treehouse");
        mName.put(KEY_URL, "http://teamtreehouse.com");
        mUrl.put(KEY_NAME, "Michael Quiapos");
        mUrl.put(KEY_URL, "http://michaelquiapos.com");

    ArrayList<HashMap<String, String>> websites = new ArrayList<HashMap<String, String>>();
      websites.add(mName); websites.add(mUrl);
       }
}
Brian Chewning
Brian Chewning
7,270 Points
Brian Chewning
Brian Chewning
7,270 Points

import android.os.Bundle; import android.widget.SimpleAdapter;

public class WebsiteListActivity extends ListActivity {

public static final String KEY_NAME = "name";
public static final String KEY_URL = "url";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_website_list);

    String[] keys = { KEY_NAME, KEY_URL };
    int[] ids = { android.R.id.text1, android.R.id.text2 };
SimpleAdapter = new SimpleAdapter(this, websites, android.R.layout.simple_list_item_2, keys, ids);
    // Add code here!
  HashMap<String, String> name = new HashMap<String, String>();
    name.put(KEY_NAME, "one");
    name.put(KEY_URL, "two");
   HashMap<String, String> url = new HashMap<String, String>();
    url.put(KEY_NAME, "three");
    url.put(KEY_URL, "four");
  ArrayList<HashMap<String, String>> websites = new ArrayList<HashMap<String, String>> ();

websites.add(name); websites.add(url); } }

What am I doing wrong?

Peter LABORDE
Peter LABORDE
2,124 Points
Peter LABORDE
Peter LABORDE
2,124 Points

You have not given your SimpleAdapter a name eg, adapter

durul
durul
62,690 Points
durul
durul
62,690 Points

import android.os.Bundle; import android.widget.SimpleAdapter;

public class WebsiteListActivity extends ListActivity {

public static final String KEY_NAME = "name";
public static final String KEY_URL = "url";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_website_list);

    String[] keys = { KEY_NAME, KEY_URL };
    int[] ids = { android.R.id.text1, android.R.id.text2 };

  // Add code here!
  HashMap<String, String> site1 = new HashMap<String, String>();
  HashMap<String, String> site2 = new HashMap<String, String>();

  site1.put(KEY_NAME, "d" );
  site1.put(KEY_URL, "dd" );

  site2.put(KEY_NAME, "e" );
  site2.put(KEY_URL, "ee" ); 


    ArrayList<HashMap<String, String>> websites = new ArrayList<HashMap<String, String>> ();
    websites.add(site1);
    websites.add(site2);

    SimpleAdapter adapter = new SimpleAdapter(this, websites,
                    android.R.layout.simple_list_item_2, 
                    keys, ids);

            setListAdapter(adapter);
}

}