更改网格布局行/列在Android的运行时数 [英] Changing GridLayout row/column count at runtime in android

问题描述

我在android开发新的。我试图用一个网格布局，以实现自己的UI设计。

I am new in android development. I am trying to use a GridLayout to fulfill my UI design.

这是该方案：

我的XML文件中定义的网格布局如下

I defined a GridLayout in xml file as following

<GridLayout
    android:id="@+id/gridLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_above="@id/linearLayoutBottomLeft"
    android:layout_alignParentLeft="true"
    android:layout_below="@id/linearLayoutTopLeft"
    android:layout_toLeftOf="@id/textView" >
</GridLayout>

然后，我把它在我的活动的onCreate（）方法类似以下内容：

Then, I set it in my activity's onCreate() method like following:

GridLayout gridLayout = (GridLayout) findViewById(R.id.gridLayout);
gridLayout.invalidate();
int rowNumber = 4;
int colNumber = 4;
gridLayout.setRowCount(rowNumber);
gridLayout.setColumnCount(colNumber);

到目前为止好，一切运作良好。
不过，我也有一些按钮那里。在按钮的单击事件，我改变了ROWNUMBER和colNumber，设置它们在运行时。这会导致一些错误，我认为......

so far so good, everything is working well. However, I also have some buttons there. In button's click event, I changed the rowNumber and colNumber, set them at runtime. It cause some error I think...

所以我的问题是，是否行号和列号可以在运行时为网格布局进行设置。

So my question is whether the row number and column number can be set at runtime for gridLayout.

如果这不是在android系统允许的，哪些是要实现像什么上述我的GUI一个很好的做法。

If this is not allowed in android, what is a good practice to realize a GUI like what I described above.

任何帮助将是AP preciated。

Any help would be appreciated.

推荐答案

您需要做gridLayout.removeAllChildren（）。

You'll need to do a gridLayout.removeAllChildren().

的Invalidate是让查看系统的方式知道查看的内容发生了变化，它需要重新绘制。

Invalidate is a way of letting the View system know that the content of the View has changed and that it needs to be redrawn.

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