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Android Implementing Designs for Android Customizing a GridView for Friends Converting a ListView to a GridView

Milan Tailor
Milan Tailor
5,132 Points
Posted by Milan Tailor
Milan Tailor
5,132 Points

ListView to GridView Code Challenge (Self destructing messaging app) help

Hey,

What's the problem with my code here? I've changed it to extend activity rather than list activity. Declared the variable, however there seems to be a problem setting the GridView. I'm sure this is simple and I'm being thick.

This relates to part 2 of one of the code challenges.

activity_products.xml 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" />

</RelativeLayout>
ProductsActivity.java 
import android.os.Bundle;
import android.widget.GridView;

// This parent class no longer applies. Switch it to Activity
public class ProductsActivity extends Activity {

    /*
     * Some code has been omitted for brevity!
     */

    // Declare mGridView here!
  protected GridView mGridView;

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

        // Set mGridView here!
      mGridView = (GridView).findViewById(R.id.gridView);
    }
}

1 Answer

James Pamplona
James Pamplona
10,015 Points

Maybe this was just a typo in posting to the forum, but you have a period in between the cast to (GridView) and findViewById(R.id.gridView), which would result in trying to call a static method on the GridView class rather than casting the result of the activity's findViewById(R.id.gridView) method. Should be

mGridView = (GridView) findViewById(R.id.gridView);
Milan Tailor
Milan Tailor
5,132 Points
Milan Tailor
Milan Tailor
5,132 Points

What a numpty. Cheers!