[android-developers] Hello Grid View Tutorial

[Hopette]

Hi!

I've been trying to use the hello grid world tutorial from
developer.android.com at this site
http://developer.android.com/resources/tutorials/views/hello-gridview.html

For some reason, my code debugs, but I get this error at runtime: "The
application HelloGridView (process com.example.hellogridview) has
stopped unexpectedly. Please try again.

The code for the HelloGridView.java is

package com.example.hellogridview;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;


public class HelloGridView extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

            GridView gridview = (GridView)
findViewById(R.id.gridview);
            gridview.setAdapter(new ImageAdapter(this));

            gridview.setOnItemClickListener(new OnItemClickListener()
{
                public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
                    Toast.makeText(HelloGridView.this, "" + position,
Toast.LENGTH_SHORT).show();
                }
            });
        }
    }
class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(HelloGridView c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup
parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled,
initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85,
85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
                R.drawable.pic3, R.drawable.pic4,
                R.drawable.pic5, R.drawable.pic5,
                R.drawable.pic6, R.drawable.pic8,
                R.drawable.pic1, R.drawable.pic2,
                R.drawable.pic3, R.drawable.pic4,
                R.drawable.pic5, R.drawable.pic6,
                R.drawable.pic7, R.drawable.pic8,
                R.drawable.pic1, R.drawable.pic2,
                R.drawable.pic3, R.drawable.pic4,
                R.drawable.pic5, R.drawable.pic5,
                R.drawable.pic6, R.drawable.pic8,
    };
}

and my code for the main.xml is

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android";
    android:id="@+id/gridview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:columnWidth="90dp"
    android:numColumns="auto_fit"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:stretchMode="columnWidth"
    android:gravity="center"
/>

Thanks so much for your help!

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