Android：如何在删除行后刷新tablelayout？

Question

I have a tablelayout that retrieves data from a *.txt file. For every line of data in the txt file, there will be one row of data.

Let's say I have two rows of data in the txt file right now, it makes sense that two tablerows will be generated.

Then, I added a OnLongPressListener which, when called, will delete one row of data from the txt file.

Now's the first question: After deleting data in the txt file, how do I refresh my tablelayout to reflect that change?

Second question is: After I get my first question solved, is it possible to have some kind of animation where one row will fade out or slide out instead of just disappearing outright?

Thanks!

Answer 1

Not sure if you are still looking for answer. But I came across this post facing kinda the same problem. Plus the fact that I was forced to use TableLayout (the amount of code written using TableLayout is huge and it wasn't my call to switch to ListView ). What I ended up doing was to remove all the views from TableLayout using:

`tableLayout.removeAllViews();`

But that's not gonna work if the number of rows after removal changes drastically. I needed to invalidate my view too, using a handler. Here is the rest of my code.

protected static final int REFRESH = 0;

private Handler _hRedraw;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tree_view_activity);

    _hRedraw=new Handler(){
        @Override
        public void handleMessage(Message msg)
        {
            switch (msg.what) {
            case REFRESH:
                redrawEverything();
                break;
            }
        }
    };
    ...
}
private void redrawEverything()
{
    tableLayout.invalidate();
    tableLayout.refreshDrawableState();
}

There is only one part left and that's the part where you send a message to your handler to refresh your view. Here is the code for it:

_hRedraw.sendEmptyMessage(REFRESH);

Answer 2

Why not use a ListView instead? It gives you better control when using an MVC model where there's a dataset tied to a View . So you could have a class that extends BaseAdapter . This class binds your data to the View and this class also has a method: notifyDataSetChanged() which is what should solve your problem.

You may find notifyDataSetChanged example and customListView helpful.

Let me know if you need any help further.

Answer 3

Generally in onCreate() we do all the stuff that shows the ui with text, try to put the code that makes up UI in a private method say setUpTabView() and try to call this from onCreate and even try calling this setUpTabView() when ever the text changed. This kind of approach i did in grid view. worked very well...!