更改视图编程一个合适的保证金？ [英] Change the Right Margin of a View Programmatically?

问题描述

可这个属性被动态Java中code变化？

Can this attribute be changed dynamically in Java code?

android:layout_marginRight

我有一个的TextView ，有改变立场的一些像素的动态就走了。

I have a TextView, that has to change its position some pixels to the left dynamically.

如何以编程方式做到这一点？

How to do it programmatically?

推荐答案

编辑：这样做的一个更通用的方法，不依赖于布局类型（比，这是它支持的利润率布局除外）：

A more generic way of doing this that doesn't rely on the layout type (other than that it is a layout type which supports margins):

public static void setMargins (View v, int l, int t, int r, int b) {
    if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
        ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
        p.setMargins(l, t, r, b);
        v.requestLayout();
    }
}

您应该检查文档的的TextView 。基本上，你要得到的TextView的的LayoutParams对象，并修改边缘，然后将其设置回TextView的。假设它在一个LinearLayout中，尝试这样的事：

You should check the docs for TextView. Basically, you'll want to get the TextView's LayoutParams object, and modify the margins, then set it back to the TextView. Assuming it's in a LinearLayout, try something like this:

TextView tv = (TextView)findViewById(R.id.my_text_view);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)tv.getLayoutParams();
params.setMargins(0, 0, 10, 0); //substitute parameters for left, top, right, bottom
tv.setLayoutParams(params);

我不能马上进行测试，所以我的铸造可由位被关闭，但被的LayoutParams需要的东西进行修改，以改变保证金。

I can't test it right now, so my casting may be off by a bit, but the LayoutParams are what need to be modified to change the margin.

不要忘记，如果你的TextView里面，例如，    RelativeLayout的的，应该使用 RelativeLayout.LayoutParams 的而不是   LinearLayout.LayoutParams

Don't forget that if your TextView is inside, for example, a RelativeLayout, one should use RelativeLayout.LayoutParams instead of LinearLayout.LayoutParams

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