Question

我试图添加一个布局片段，但我一直收到错误：

Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

这是片段包含在 rev_lay_drawer_nav.xml 中的方式：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <LinearLayout
        android:id="@+id/helpAboutLL"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <Button
            android:id="@+id/about_bags_bttn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="About BAGS" />

        <Button
            android:id="@+id/help_bttn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/rev_dr_thinner_help_top"
            android:text="Help" />

    </LinearLayout>

</LinearLayout>

这就是我所说的：

mContext = context;

revLayDrawerLayoutInflater = LayoutInflater.from( mContext );
revLayDrawerView = revLayDrawerLayoutInflater.inflate( R.layout.rev_lay_drawer_nav, null, false );

LinearLayout helpAboutLL = (LinearLayout) revLayDrawerView.findViewById(R.id.helpAboutLL);

LinearLayout revDrawerNavViewContainer = new LinearLayout(mContext);
revDrawerNavViewContainer.setOrientation(LinearLayout.VERTICAL);

revDrawerNavViewContainer.addView( helpAboutLL );

正确的方法是什么？

Answer 1

您使用findViewById意味着您已经拥有一个父布局的视图。

在具有其他父视图的情况下，您无法将视图添加到另一个布局。

目前尚不清楚为什么需要嵌套的LinearLayouts以便更改XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/helpAboutLL"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/about_bags_bttn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="About BAGS" />

    <Button
        android:id="@+id/help_bttn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/rev_dr_thinner_help_top"
        android:text="Help" />

</LinearLayout>

并充气并添加

LinearLayout revDrawerNavViewContainer = new LinearLayout(mContext);
revDrawerNavViewContainer.setOrientation(LinearLayout.VERTICAL);

View helpAboutLL = revLayDrawerLayoutInflater.inflate( R.layout.rev_lay_drawer_nav, null, false );
revDrawerNavViewContainer.addView( helpAboutLL );

如何在Android中包含布局片段

1 个答案: