如何显示在一个TextView滚动条编程 [英] How to show scrollbars on a TextView programmatically

问题描述

我找啊找找到一个答案，如何在垂直（或水平）滚动条添加到一个TextView，而不必使用XML只是为了添加一行：机器人：滚动条=垂直

I have searched and searched to find an answer to how to add a vertical (or horizontal) scrollbar to a TextView without having to use the XML just to add the line: android:scrollbars="vertical".

必须有一个办法做到这一点编程，不需要另一个滚动型中坚持这一点。

There has to be a way to do this programmatically that doesn't require sticking this within another ScrollView.

我刚刚发现了如何和因为我的方式来兴奋这一点，并希望能帮助别人谁被套牢了同样的问题，那就是：

I've just found out how and because I am way to excited about this and want to help anyone else who is stuck with the same question, here it is:

推荐答案

Rusian Yanchyshyn，张贴在<一个在他的回答的关键href=\"http://stackoverflow.com/questions/4869276/android-enable-scrollbars-on-canvas-based-view/8582996\">Android:启用画布基础观滚动条

Rusian Yanchyshyn, posted the key in his answer at Android: Enable Scrollbars on Canvas-Based View

随着anonmous类和放大器的帮助;一个初始化块，我们现在可以做到以下几点：

With the help of an anonmous class & an initializer block we can now do the following:

            TextView textViewWithScrollBars = new TextView(context)
            {
                {
                    setVerticalScrollBarEnabled(true);
                    setMovementMethod(ScrollingMovementMethod.getInstance());
                    setScrollBarStyle(View.SCROLLBARS_INSIDE_INSET);

                    // Force scrollbars to be displayed.
                    TypedArray a = this.getContext().getTheme().obtainStyledAttributes(new int[0]);
                    initializeScrollbars(a);
                    a.recycle();                        
                }
            }

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