关于简单的gridview学习笔记

 1  1 <GridView
 2  2         android:id="@+id/gridview"  
 3  3         android:layout_width="fill_parent"
 4  4         android:layout_height="wrap_content"
 5  5         android:layout_below="@+id/askl"
 6  6         android:layout_marginTop="5dp"
 7  7         android:gravity="center"
 8  8         android:horizontalSpacing="10dp"   <!--水平间隔  -->
 9  9         android:numColumns="auto_fit"   <!--列数-->
10 10         android:columnWidth="70dp" <!--列宽-->
11 11         android:stretchMode="columnWidth"    <!--如何填满空余的位置，模拟器采用WVGA800*480，每排4列，有4＊100＋5＊3＝415，还余65px的空间，如果是columnWidth，则这剩余的65将分摊给4列，每列增加16/17px。如果采用SpacingWidth，则分摊给3个间隔空隙 -->  
12 12         android:verticalSpacing="10dp" >
13 13  </GridView>

public class heroActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.hero);

        GridView gridview = (GridView) findViewById(R.id.gridview);
        ArrayList<HashMap<String, Object>> lstimage = new ArrayList<HashMap<String, Object>>();
        for (int i = 0; i < arr.nums(); i++) {
            HashMap<String, Object> map = new HashMap<String, Object>();
            map.put("image", arr.getimage(i));
            map.put("text", arr.getname(i));
            lstimage.add(map);
        }  //将英雄头像和名称添加到动态数组 lstimage 中
        SimpleAdapter saImageItems = new SimpleAdapter(this, lstimage,
                R.layout.gv, new String[] { "image", "text" }, new int[] {
                        R.id.image, R.id.text });
        gridview.setAdapter(saImageItems); //设置gridview的适配器
        gridview.setOnItemClickListener(new ItemClickListener()); 
        
        Button bask = (Button) findViewById(R.id.bask);
        bask.getBackground().setAlpha(100);
        bask.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View v) {
                Toast.makeText(heroActivity.this, "付费后开通查询功能 >.<", Toast.LENGTH_LONG)
                .show();
            }
        });
    }

    class ItemClickListener implements OnItemClickListener {

        public void onItemClick(AdapterView<?> parent, View view, int position,
                long rowid) {
            HashMap<String, Object> item = (HashMap<String, Object>) parent
                    .getItemAtPosition(position);
            // 获取数据源的属性值
            String itemText = (String) item.get("text");
            Object object = item.get("image");  //获取所点击的英雄头像(image)和名称（text)
            Toast.makeText(heroActivity.this, itemText, Toast.LENGTH_LONG)
                    .show();
            Intent intent = new Intent(heroActivity.this, herodata.class);
            intent.putExtra("position", position);
            startActivity(intent);

        }
    }

}