调用emoveAllViews()；仍会导致IlLegalStateException：您必须首先对子对象的父级调用emoveView()

Calling removeAllViews(); still results in IllegalStateException:You must call removeView() on the childamp;#39;s parent first(调用emoveAllViews()；仍会导致IlLegalStateException：您必须首先对子对象的父级调用emoveView())

问题描述

我不确定为什么会发生这种情况，但我收到错误消息：调用layout.removeAllViews();仍然会导致IllegalStateException: The specified child already has a parent.您必须首先在子级的父级上调用emoveView()。

奇怪的是，我在添加新的之前调用了：emoveAllViews()：

@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);

如有任何建议，我们不胜感激。

推荐答案

您的问题与layout无关。您的问题是imageViewz。它已经有了父级，这就是触发您的异常的原因。在将layout添加到layout之前，您需要从其当前父级中删除imageViewz。

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