xml布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.example.graidtest.MainActivity" ><GridView android:id="@+id/gridView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:columnWidth="90dp"android:numColumns="auto_fit"android:verticalSpacing="10dp"android:horizontalSpacing="10dp"android:stretchMode="columnWidth"android:gravity="center"/></RelativeLayout>

MainActivity.java:

public class MainActivity extends ActionBarActivity {private GridView gridView;private ImageAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);gridView = (GridView) findViewById(R.id.gridView);adapter = new ImageAdapter();gridView.setAdapter(adapter);gridView.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(MainActivity.this, "--->>" + position, 1).show();}});}private int[] imgs = { R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher, };public class ImageAdapter extends BaseAdapter {@Overridepublic int getCount() {return imgs.length;}@Overridepublic Object getItem(int position) {return imgs[position];}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// 手工创建view对象 或// 加载xmlImageView imageView = null;if (convertView == null) {imageView = new ImageView(MainActivity.this);} else {imageView = (ImageView) convertView;}// 设置gridView显示的间距imageView.setLayoutParams(new GridView.LayoutParams(85, 85));imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);imageView.setPadding(8, 8, 8, 8);imageView.setImageResource(imgs[position]);return imageView;}}}