Android 开发 Tip 4 -- You must call removeView() on the child's parent first

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转载请注明出处：http://blog.csdn.net/crazy1235/article/details/70188640

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问题描述：

Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.at android.view.ViewGroup.addViewInner(ViewGroup.java:4417)at android.view.ViewGroup.addView(ViewGroup.java:4258)at android.view.ViewGroup.addView(ViewGroup.java:4198)at android.view.ViewGroup.addView(ViewGroup.java:4171)

通常发生在动态添加view的时候，要添加的view有parent view。所以报这个错误。

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还原现场

LayoutInflater inflater = getLayoutInflater();LinearLayout tempLayout = (LinearLayout) inflater.inflate(R.layout.temp_layout, null);TextView textView = (TextView) tempLayout.findViewById(R.id.text_view);rootLayout.addView(textView);

temp_layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <ImageView        android:id="@+id/imageView"        android:layout_width="match_parent"        android:layout_height="wrap_content"        app:srcCompat="@drawable/child" />    <TextView        android:id="@+id/text_view"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hope is a good thing, maybe the best of things" /></LinearLayout>

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解决方案

先将要添加的view从其原先parent viewgroup中移除。

TextView textView = (TextView) tempLayout.findViewById(R.id.text_view);tempLayout.removeView(textView);rootLayout.addView(textView);