public View getView(int position, View convertView, final ViewGroup parent)三个参数的意思

最新推荐文章于 2022-11-02 15:13:45 发布

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最新推荐文章于 2022-11-02 15:13:45 发布

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文章标签：移动开发

本文详细解析了Adapter模式中三个关键参数的作用：position用于指定数据集中的位置；convertView为可复用视图，有助于提高性能；parent则定义了视图的父容器，确保视图能够正确加载及显示。

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最近看到有人在问这三个参数的含义，其实帮助已经很详细的介绍了这三个参数，看来还是要好好学学英语了，不然连解释都看不懂。

/**
   * Get a View that displays the data at the specified position in the data set. You can either
   * create a View manually or inflate it from an XML layout file. When the View is inflated, the
   * parent View (GridView, ListView...) will apply default layout parameters unless you use
   * {@link android.view.LayoutInflater#inflate(int, android.view.ViewGroup, boolean)}
   * to specify a root view and to prevent attachment to the root.
   *
   * @param position The position of the item within the adapter's data set of the item whose view
   *       we want.
   * @param convertView The old view to reuse, if possible. Note: You should check that this view
   *       is non-null and of an appropriate type before using. If it is not possible to convert
   *       this view to display the correct data, this method can create a new view.
   * @param parent The parent that this view will eventually be attached to
   * @return A View corresponding to the data at the specified position.
   */