调用removeAllViews（）;仍然导致IllegalStateException异常：必须首先对孩子的父母打电话removeView（） [英] Calling removeAllViews(); still results in IllegalStateException:You must call removeView() on the child's parent first

问题描述

我不知道为什么发生这种情况，但我得到一个错误，说明：调用 layout.removeAllViews（）; 仍然导致 IllegalStateException异常：该指定的小孩已经有一个父您必须在孩子的父母先调用removeView（）

I'm not sure why this is happening but I'm getting an error stating: Calling layout.removeAllViews(); still results in IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

但奇怪的是我打过电话：removeAllViews（）;添加一个新的人之前：

The strange part is I've called: removeAllViews(); before adding a new one:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.download);

...

    ImageView imageViewz = (ImageView) findViewById(R.id.imageView6); 
            Picasso.with(context).load(background).into(imageViewz);

LinearLayout layout = new LinearLayout(Download.this);
                layout.setId(R.id.download);
                LayoutParams layoutParams 
                 = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
                layout.setLayoutParams(layoutParams);
                layout.setOrientation(LinearLayout.VERTICAL);
                LayoutParams imageViewLayoutParams 
                 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                imageViewz.setLayoutParams(imageViewLayoutParams);
                layout.removeAllViews();
                layout.addView(imageViewz);
                setContentView(layout);

不过，我仍然得到了致命的错误...所以我不知道究竟为什么发生这种情况。

Yet I still get the fatal error...so I'm not sure exactly why this is happening.

任何建议都AP preciated。

Any suggestions are appreciated.

推荐答案

您的问题是不是与布局。你的问题是与 imageViewz 。它已经拥有了父母，这是什么触发你的异常。你需要从当前父删除 imageViewz 将其添加到布局。

Your problem is not with layout. Your problem is with imageViewz. It already has a parent, and that is what is triggering your exception. You need to remove imageViewz from its current parent before you add it to layout.

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