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Android

Posted by Lon Sanders
Lon Sanders
9,931 Points

Build a Blog Reader Android App Adapting Data for Display in a List Adding Secondary Data with a SimpleAdapter question #2.

Create an ArrayList named 'websites' and add your two HashMap variables to it. Syntax hint: ArrayList<HashMap<String, String>>

I keep getting the same error whatever I try.

"Bummer! Compilation Error! Check your syntax and remember that the ArrayList is declared as 'ArrayList<HashMap<String, String>>' and the constructor looks the same."

I am not sure if this is the correct error code or if the system is stuck. My code is below. Any Ideas?

import java.util.ArrayList;
import java.util.HashMap;

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 };

    HashMap<String, String> webSite1 = new HashMap<String, String>();
    HashMap<String, String> webSite2 = new HashMap<String, String>();

  webSite1.put(KEY_NAME, "Treehouse");
  webSite1.put(KEY_URL, "http://teamtreehouse.com");
  webSite2.put(KEY_NAME, "Tyranski");
  webSite2.put(KEY_URL, "http://tyranski.com"); 

       ArrayList<HashMap<String, String>> websites = new ArrayList<HashMap<String, String>>();
     String name = website.getString(KEY_NAME);
     name = Html.fromHtml(name).toString();      
      String url = website.getString(KEY_URL);
     url = Html.fromHtml(url).toString();

    }
}
Sanat Tripathi
Sanat Tripathi
8,109 Points

You didn't add the hashMap variables inside the ArrayList. For adding use the "add" method of ArrayList.

For e.g.

websites.add(webSite1);

websites.add(webSite2);

Lon Sanders
Lon Sanders
9,931 Points

OK, I tried that and still get the exact same error message. Are there any other error messages available that would lead me to the error of my ways?

I keep getting: "Bummer! Compilation Error! Check your syntax and remember that the ArrayList is declared as 'ArrayList<HashMap<String, String>>' and the constructor looks the same."

And why is the flow of the code not more like the flow we went over in class like this?

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

        ArrayList<HashMap<String, String>> websites = 
       new ArrayList<HashMap<String, String>>(); {
       String name = website.getString(KEY_NAME);
       name = Html.fromHtml(name).toString();      
       String url = website.getString(KEY_URL);
       url = Html.fromHtml(url).toString();

       HashMap<String, String> webSite1 = new HashMap<String, String>();
       HashMap<String, String> webSite2 = new HashMap<String, String>();
          webSite1.put(KEY_NAME, "ABC"); 
          webSite1.put(KEY_URL, "http://abc.com"); 
          webSite2.put(KEY_NAME, "CBS");
          webSite2.put(KEY_URL, "http://cbs.com"); 

        websites.add(webSite1);
            websites.add(webSite2);          
    }

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

}

}

Sanat Tripathi
Sanat Tripathi
8,109 Points

The following is my code for second question , which perfectly passes the test, take a look...

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 };

            HashMap<String, String> hash1 = new HashMap<String, String> ();
            HashMap<String, String> hash2 = new HashMap<String, String> ();      
    hash1.put(KEY_NAME , "someName");
    hash1.put(KEY_URL , "www.someName.com");
    hash2.put(KEY_NAME , "someOtherName");
    hash2.put(KEY_URL , "www.someOtherName.com");

  ArrayList<HashMap<String, String>> websites = new ArrayList<HashMap<String, String>> ();
  websites.add(hash1);
  websites.add(hash2);
}

}

Sanat Tripathi
Sanat Tripathi
8,109 Points

@Lon : why do you have that curly brace after your ArrayList declaration ??

Lon Sanders
Lon Sanders
9,931 Points

Sanatkumar,

Thank you for helping pull my head out of my butt. I guess I was getting ahead of myself again.

Thanks again.

Sanat Tripathi
Sanat Tripathi
8,109 Points

No problem, however if you don't mind please select my answer as the best answer I will gain some points :)

Ben Jakuben
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

These types of errors are easier to see in a real IDE like Eclipse or Android Studio! Hopefully we can enhance our code challenge engine with that type of feedback down the road.

1 Answer

John Paul Ashenfelter
John Paul Ashenfelter
1,118 Points
John Paul Ashenfelter
John Paul Ashenfelter
1,118 Points

Glad this was solved successfully. Way to go everyone!