Android 如何以编程方式将视图添加到 RelativeLayout？
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How to add a view programmatically to RelativeLayout?
提问by Suzan Cioc
Can you give me a very simple example of adding child view programmatically to RelativeLayoutat a given position?
你能给我一个非常简单的例子，以编程方式将子视图添加到RelativeLayout给定位置吗？
For example, to reflect the following XML:
例如，要反映以下 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" />
I don't understand how to create an appropriate RelativeLayout.LayoutParamsinstance.
我不明白如何创建一个合适的RelativeLayout.LayoutParams实例。
回答by JRaymond
Heres an example to get you started, fill in the rest as applicable:
这是一个让您入门的示例，请根据需要填写其余部分：
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);
The docs for RelativeLayout.LayoutParams and the constructors are here
RelativeLayout.LayoutParams 和构造函数的文档在这里
回答by Onuray ?ahin
Firstly, you should give an id to your RelativeLayout let say relativeLayout1.
首先，你应该给你的RelativeLayout 一个id，比如relativeLayout1。
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);
