GridView 加监听器

//监听器
gv_1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        Toast.makeText(GridViewActivity.this, "点击的图片索引=" + position, Toast.LENGTH_SHORT).show();
    }
});

//长安删除
gv_1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {

        //1-删除数据
        //从集合里删除长按的数据
        liv.remove(position);

        //2-刷新GridView视图,看到效果
        //通知适配器，数据源改变
        im.notifyDataSetChanged();

        Toast.makeText(GridViewActivity.this, "删除记录索引="+position, Toast.LENGTH_SHORT).show();
        return true;//事件已经被消费，不需要再处理
    }
});