如何以编程方式视图添加到RelativeLayout的？如何以编程方式视图添加到RelativeLa

你能给我加子视图以编程方式的一个非常简单的例子RelativeLayout在给定的位置？

例如，要体现以下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" />

我不知道如何创建一个合适的RelativeLayout.LayoutParams实例。

Answer 1:

这里有一个例子，让你开始，填写其他适用：

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);

对于RelativeLayout.LayoutParams的文档和构造函数是在这里

Answer 2:

首先，你的RelativeLayout让说relativeLayout1你应该给一个ID。

RelativeLayout mainLayout = (RelativeLayout) findViewById(R.id.relativeLayout1);
TextView mTextView = new TextView(context);
mTextView.setText("Dynamic TextView");
mTextView.setId(111);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
mainLayout.addView(mTextView, params);

文章来源: How to add a view programmatically to RelativeLayout?