java - 以编程方式设置 PercentageRelativeLayout 中的宽高比

Question

我想以编程方式设置 PercentRelativeLayout 内的 FrameLayout 的宽高比。

我已经在 xml 中尝试过，它正在工作:

<android.support.percent.PercentRelativeLayout 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="#000"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <FrameLayout
        app:layout_widthPercent="100%"
        app:layout_aspectRatio="178%" //aspect ratio
        android:orientation="vertical"
        android:id="@+id/liveTV_frame"
        android:layout_marginBottom="50dp"
        android:layout_centerInParent="true"
        android:background="@android:color/background_dark"
        android:keepScreenOn="true">
    </FrameLayout>
</android.support.percent.PercentRelativeLayout>

但我需要以编程方式设置它。

我怎样才能做到这一点？

Answer 1

PercentRelativeLayout layout = ...;
PercentRelativeLayout.LayoutParams layoutParams 
           = (PercentRelativeLayout.LayoutParams) layout.getLayoutParams();
layoutParams.getPercentLayoutInfo().aspectRatio = ...; // float value
layout.requestLayout();