GridView基本构建Demo

public class Main extends Activity implements OnItemSelectedListener,
		OnItemClickListener {
	private ImageView imageView;
	private int[] resIds = new int[] { R.drawable.item1, R.drawable.item2,
			R.drawable.item3, R.drawable.item4, R.drawable.item5,
			R.drawable.item6, R.drawable.item7, R.drawable.item8,
			R.drawable.item9, R.drawable.item10, R.drawable.item11,
			R.drawable.item12, R.drawable.item13, R.drawable.item14,
			R.drawable.item15 };

	@Override
	public void onItemSelected(AdapterView<?> parent, View view, int position,
			long id) {
		imageView.setImageResource(resIds[position]);
	}

	@Override
	public void onNothingSelected(AdapterView<?> parent) {
		// TODO Auto-generated method stub

	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		imageView.setImageResource(resIds[position]);

	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		GridView gridView = (GridView) findViewById(R.id.gridview);

		List<Map<String, Object>> cells = new ArrayList<Map<String, Object>>();
		for (int i = 0; i < resIds.length; i++) {
			Map<String, Object> cell = new HashMap<String, Object>();
			cell.put("imageview", resIds[i]);
			cells.add(cell);
		}
		SimpleAdapter simpleAdapter = new SimpleAdapter(this, cells,
				R.layout.cell, new String[] { "imageview" },
				new int[] { R.id.imageview });
		gridView.setAdapter(simpleAdapter);
		imageView = (ImageView) findViewById(R.id.imageview);
		gridView.setOnItemSelectedListener(this);
		gridView.setOnItemClickListener(this);
		imageView.setImageResource(resIds[0]);

	}
}

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent" android:gravity="center_horizontal">
	<GridView android:id="@+id/gridview" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:numColumns="5"
		android:padding="20dp" android:horizontalSpacing="6dp"
		android:verticalSpacing="6dp" />
	<ImageView android:id="@+id/imageview" android:layout_width="fill_parent"
		android:layout_height="200dp" />
</LinearLayout>

cell.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<ImageView android:id="@+id/imageview" android:layout_width="48dp"
		android:layout_height="48dp"  />
</LinearLayout>