How to Use Android RelativeLayout

To set up an Android RelativeLayout, you can follow these steps:

1. Define a RelativeLayout in the XML layout file.

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- 添加子视图 -->
    
</RelativeLayout>

1. To add child views in a RelativeLayout, you can use the following attributes to configure their positions and relationships:

1. android:layout_alignParentTop: aligns the view with the top of the parent layout.
2. Align the view to the bottom of the parent layout.
3. “android:layout_alignParentLeft: Align the view with the left side of the parent layout.”
4. android:layout_alignParentRight: Aligns the view to the right side of the parent layout.
5. Center the view horizontally.
6. Center the view vertically.
7. android:layout_toLeftOf: Position the view to the left of a specified view.
8. android:layout_toRightOf: Position the view to the right of a specified view.
9. android:layout_below: Place the view below the specified view.
10. android:layout_above: position the view above the specified view.

For example, the following is an example of a RelativeLayout that includes two TextView views:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView 1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView 2"
        android:layout_below="@+id/textView1"
        android:layout_alignParentRight="true" />

</RelativeLayout>

In this example, the first TextView is aligned with the top and left of the RelativeLayout, while the second TextView is placed below the first TextView and aligned with the right of the RelativeLayout.

This is just the basic configuration of RelativeLayout, you can further adjust and organize the position relationships of the child views according to your needs.