如何在父视图变得可滚动之前停止绘制 GridView 项目?
我正在尝试使用 GridView 填充 ViewFlipper,但具有分页功能而不是滚动功能。 GridView
将填充单个“页面”(无需滚动的完整页面),并开始使用数据集的下一位填充 ViewFlipper
中的下一个视图。
我需要动态填充页面,因为屏幕尺寸会有所不同。这个 GridView 带有一个带有 getView() 重写的自定义适配器类,所以我认为最优雅的解决方案是在 GridView 中正常绘制视图,但这就是我遇到一些困惑的地方:
有两件事:
我如何告诉 getView()
函数将 GridView
项写入下一个 <代码>查看 ViewFlipper
?由此看来,我如何知道屏幕何时填充到滚动条弹出之前(我不需要可滚动列表,这是使用 ViewFlipper 的全部要点)。
还是有我还没有找到的更好的解决方案?我在 API 演示中找不到示例,除了这个之外,在 stackoverflow 上几乎没有找到任何信息,但我仍然需要上述两个建议来使该解决方案发挥作用(除非有更好的东西): Android ViewFlipper 不翻转
GridView 适配器:
// custom adapter made for the GridView
public class ButtonAdapter extends BaseAdapter {
private Context mContext;
private List<Map<String, String>> mData;
private int mLayout;
public ButtonAdapter(Context c, int layout, List<Map<String, String>> list) {
this.mContext = c;
this.mData = list;
this.mLayout=layout;
}
public int getCount() {
return mData.size();
}
public Object getItem(int position) {
return mData.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
Button btn = null;
if(convertView==null) {
convertView = inflater.inflate(this.mLayout, null);
}
btn = (Button)convertView.findViewById(R.id.grid_btn);
if(btn != null) {
//btn.setPadding(8,8,8,8);
btn.setText(mData.get(position).get("label"));
btn.setId(position);
}
return convertView;
}
}
I'm trying to populate a ViewFlipper
with a GridView
, but with a paging capability rather than scrolling. The GridView
will fill out a single "page" (one complete page without scrolling), and start filling out the next View in the ViewFlipper
with the next bit of the data set.
I need to dynamically fill the pages, as the screen sizes will vary. This GridView
sports a custom adapter class with a getView()
override, so I was thinking the most elegant solution would be to draw the view as normal in the GridView
, but this is where I run into some confusion:
Two things:
How can i tell the getView()
function to write the GridView
items to the next View
in the ViewFlipper
? And by that token, how can I know when the screen fills to just before the scroll bar pops up (I don't want scrollable lists, which was the whole point in using a ViewFlipper
).
Or is there a better solution that i just haven't found yet? I couldn't find an example in the API demos and little info here on stackoverflow except this, which got me started, but I still need the above two suggestions to make this solution work (unless there's something better): Android ViewFlipper not flipping
The GridView adapter:
// custom adapter made for the GridView
public class ButtonAdapter extends BaseAdapter {
private Context mContext;
private List<Map<String, String>> mData;
private int mLayout;
public ButtonAdapter(Context c, int layout, List<Map<String, String>> list) {
this.mContext = c;
this.mData = list;
this.mLayout=layout;
}
public int getCount() {
return mData.size();
}
public Object getItem(int position) {
return mData.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
Button btn = null;
if(convertView==null) {
convertView = inflater.inflate(this.mLayout, null);
}
btn = (Button)convertView.findViewById(R.id.grid_btn);
if(btn != null) {
//btn.setPadding(8,8,8,8);
btn.setText(mData.get(position).get("label"));
btn.setId(position);
}
return convertView;
}
}
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