The specified child already has a parent. You must call removeView() on the child's parent first.

<pre name="code" class="java"><span style="font-size:24px;">java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.</span>

今天写代码要给AlertDialog加一个自定义的View 然后就报错了，报错是因为再一次触发加载布局view的时候由于在viewgroup里已经有了这个布局所以不能再一次加载，必须先要移除，经过分析发现了解决办法

一开始是这样写的

<span style="font-size:24px;">view = getLayoutInflater().from(MainActivity2.this).inflate(R.layout.numberpicker,null);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity2.this);
</span>

<span style="font-size:24px;">builder.setView(view);</span>

后来这样写 就可以了

<span style="font-size:24px;">view = getLayoutInflater().from(MainActivity2.this).inflate(R.layout.numberpicker,null);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity2.this);
<span style="color:#ff6666;">ViewGroup vg=(ViewGroup)view.getParent();
if(vg!=null)
   {   vg.removeView(view);</span></span>

<span style="font-size:24px;color:#ff6666;">   }</span>

<span style="font-size:24px;">builder.setView(view);</span>

The specified child already has a parent. You must call removeView() on the child's parent first.