4.GridView

/**
 * 主页面
 * 
 * @author Kevin
 * 
 */
public class HomeActivity extends Activity {
	private GridView gvHome;
	private String[] mItems = new String[] { "手机防盗", "通讯卫士", "软件管理", "进程管理",
			"流量统计", "手机杀毒", "缓存清理", "高级工具", "设置中心" };
	private int[] mPics = new int[] { R.drawable.home_safe,
			R.drawable.home_callmsgsafe, R.drawable.home_apps,
			R.drawable.home_taskmanager, R.drawable.home_netmanager,
			R.drawable.home_trojan, R.drawable.home_sysoptimize,
			R.drawable.home_tools, R.drawable.home_settings };
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_home);
		gvHome = (GridView) findViewById(R.id.gv_home);
		gvHome.setAdapter(new HomeAdapter());
	}
	class HomeAdapter extends BaseAdapter {
		@Override
		public int getCount() {
			return mItems.length;//9个列表
		}
		@Override
		public Object getItem(int position) {
			return mItems[position];//返回null也没事
		}
		@Override
		public long getItemId(int position) {
			return position;
		}
		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View view = View.inflate(HomeActivity.this,
					R.layout.home_list_item, null);//将字布局加载进来
			ImageView ivItem = (ImageView) view.findViewById(R.id.iv_item);
			TextView tvItem = (TextView) view.findViewById(R.id.tv_item);
            //getview会被调用9次
			tvItem.setText(mItems[position]);
			ivItem.setImageResource(mPics[position]);
			return view;
		}
	}
	// 设置监听
		gvHome.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				switch (position) {
				case 0:
					// 手机防盗
					showPasswordDialog();
					break;
				case 8:
					// 设置中心
					startActivity(new Intent(HomeActivity.this,
							SettingActivity.class));
					break;
				default:
					break;
				}
			}
		});

}