九宫格

布局：
main_activity

TextView        android:layout_gravity="center"        android:layout_width="wrap_content" android:layout_height="wrap_content" style="@style/hello" />  <LinearLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content">  <fragment  android:id="@+id/fragment" android:name="com.example.administrator.ninephoto.GridFragment" android:layout_width="match_parent" android:layout_height="match_parent" tools:layout="@layout/fragment_grid"/>  LinearLayout>

fragment_grid

   :id="@+id/grid_photo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:numColumns="3"/>  <LinearLayout  android:layout_gravity="center"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:orientation="vertical">  <ImageView  android:id="@+id/img1" android:layout_width="180dp" android:layout_height="180dp" />  LinearLayout>

grid_item

:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" />

java代码：
GridFragment：

public class GridFragment extends Fragment { private GridView grid_photo; private SimpleAdapter simpleAdapter; private ArrayList< HashMap<String, Object>> photo; private ImageView img1; //将图片资源打包到集合中 private int []icon = { R.drawable.a1,R.drawable.a2,R.drawable.a3,R.drawable.a4,R.drawable.a5, R.drawable.a6,R.drawable.a7,R.drawable.a8,R.drawable.a9}; public GridFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_grid, container, false); //加载相关控件 grid_photo = (GridView)view.findViewById(R.id.grid_photo); img1 = (ImageView)view.findViewById(R.id.img1); //创建适配器并绑定 simpleAdapter = new SimpleAdapter(getActivity(),getData(), R.layout.grid_item,new String[]{"cat"},new int[]{R.id.img}); grid_photo.setAdapter(simpleAdapter); //为九宫格图片添加监听器 grid_photo.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { img1.setImageResource(icon[position]); } }); return view; } //相关数据源的获取 public ArrayList<String, Object>> getData() { photo = new ArrayList<String, Object>>(); for (int i=0;i<icon.length;i++){ HashMap<String, Object> map = new HashMap<String, Object>(); map.put("cat", icon[i]); photo.add(map); } return (ArrayList<String, Object>>) photo; } }

在相关数据源的获取这里原本的添加数据的方法是一个个put，后面找到个是代码简洁的方法是利用一个for循环这样只用写一个put方法就可以获取9个数据源

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