如何以编程方式向RelativeLayout 添加视图? [英] How to add a view programmatically to RelativeLayout?

问题描述

你能给我一个非常简单的例子，在给定位置以编程方式将子视图添加到 RelativeLayout 吗?

Can you give me a very simple example of adding child view programmatically to RelativeLayout at a given position?

例如，要反映以下 XML:

For example, to reflect the following XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="107dp"
    android:layout_marginTop="103dp"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

我不明白如何创建一个合适的 RelativeLayout.LayoutParams 实例.

I don't understand how to create an appropriate RelativeLayout.LayoutParams instance.

推荐答案

这是一个帮助您入门的示例，请根据需要填写其余部分:

Heres an example to get you started, fill in the rest as applicable:

TextView tv = new TextView(mContext);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
params.leftMargin = 107
...
mRelativeLayout.addView(tv, params);

RelativeLayout.LayoutParams 和构造函数的文档是 这里

The docs for RelativeLayout.LayoutParams and the constructors are here

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