Question

一切正常，但我无法添加Scrollview，因为我在scrollView.addView（mainlinearLayout）中收到错误;

有类似的问题，但我没有找到答案。如果你帮助我，我会很高兴的。感谢

这是错误

java.lang.IllegalStateException：指定的子节点已经有了家长。您必须先在孩子的父母身上调用removeView（）。

这是activity_main.xml的代码

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

    </LinearLayout>

这是MainActivity的代码

public void drawer() {
        String[] word=s.split(" ");
        scrollView=new ScrollView(this);
        mainlinearLayout = (LinearLayout) findViewById(R.id.LinLay);
        mainlinearLayout.setVerticalScrollBarEnabled(true);
        scrollView.addView(mainlinearLayout);
        childLinearLayout = getLinearLayout();


        for (int i = 1; i < word.length; i++) {
            final TextView textView = new TextView(this);
            textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            textView.setTextSize(17);
            textView.setPadding(5, 5, 5, 5);
            textView.setText(word[i-1].toString());
            childLinearLayout.addView(textView);

            if (i % separatorNum == 0 && i != 0) {
                mainlinearLayout.addView(childLinearLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
                setContentView(mainlinearLayout);
                childLinearLayout=getLinearLayout();
            }

            textView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Toast.makeText(getApplicationContext(), textView.getText().toString(), Toast.LENGTH_LONG).show();
                }
            });
        }
     }

Answer 1

如果您将activity_main.xml作为活动的内容视图：

setContentView(R.layout.activity_main)

然后您将视图附加到活动，因此将它（以及具有id = LinLay的LinearLayout）作为父级。

如果您想让ScrollView成为Activity中的主要UI元素，那么您应该

setContentView(scrollView)

或者更好的是用XML做到这一点。 ScrollView是父级后，您可以添加LinearLayout。

Answer 2

您正在布局中添加滚动视图。

如果要在滚动视图中添加布局，则始终记住您只能在滚动视图中添加一个布局。您也可以在滚动视图中添加线性布局，然后可以添加相同的布局数。

Answer 3

尝试下面的代码，它将检查孩子是否有父，如果有，然后删除视图，这将帮助您。

 public void drawer() {
                String[] word=s.split(" ");
                scrollView=new ScrollView(this);
                mainlinearLayout = (LinearLayout) findViewById(R.id.LinLay);
                mainlinearLayout.setVerticalScrollBarEnabled(true);
                scrollView.addView(mainlinearLayout);
                childLinearLayout = getLinearLayout();


                for (int i = 1; i < word.length; i++) {
                    final TextView textView = new TextView(this);
                    textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
                    textView.setTextSize(17);
                    textView.setPadding(5, 5, 5, 5);
                    textView.setText(word[i-1].toString());
    if (textView.getParent() != null) {
                            ((ViewGroup) textView.getParent()).removeView(textView);
                        }
                    childLinearLayout.addView(textView);

                    if (i % separatorNum == 0 && i != 0) {
                        mainlinearLayout.addView(childLinearLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
                        setContentView(mainlinearLayout);
                        childLinearLayout=getLinearLayout();
                    }

                    textView.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            Toast.makeText(getApplicationContext(), textView.getText().toString(), Toast.LENGTH_LONG).show();
                        }
                    });
                }

            }

Answer 4

你可以试试这个，并在调用之前尝试设置setContentView(R.layout.activity_main)。

问题是您的LinearLayout已经附加到活动视图，您尝试添加到scrollview的同一个布局，因此它给出了错误。

public void drawer() {
    //String s = "sdfsdfsdf sdfsdfsd sdfsdf sdfs sdf sdf sdf sdfdsfsdf sfsdf ssdfdsf sdfsd";
    int separatorNum = 5;
    String[] word = s.split(" ");
    scrollView = new ScrollView(this);
    mainlinearLayout = (LinearLayout) findViewById(R.id.LinLay);
    mainlinearLayout.setVerticalScrollBarEnabled(true);

    mainlinearLayout.addView(scrollView);

    LinearLayout linearLayout = new LinearLayout(this);
    linearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    linearLayout.setOrientation(LinearLayout.VERTICAL);
    scrollView.addView(linearLayout);

    LinearLayout childLinearLayout = getLinearLayout();


    for (int i = 1; i < word.length; i++) {
        final TextView textView = new TextView(this);
        textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        textView.setTextSize(17);
        textView.setPadding(5, 5, 5, 5);
        textView.setText(word[i - 1].toString());
        childLinearLayout.addView(textView);

        if (i % separatorNum == 0 && i != 0) {
            linearLayout.addView(childLinearLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
           // setContentView(mainlinearLayout);
            childLinearLayout = getLinearLayout();
        }

        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getApplicationContext(), textView.getText().toString(), Toast.LENGTH_LONG).show();
            }
        });
    }

}

private LinearLayout getLinearLayout() {
    LinearLayout childLinearLayout = new LinearLayout(this);
    childLinearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    childLinearLayout.setOrientation(LinearLayout.HORIZONTAL);

    return childLinearLayout;
}

Answer 5

您尝试添加退出布局以滚动查看其给定错误，因此请尝试将滚动视图添加到现有布局

不知道它是否符合您的要求。

试试这个方法

public void drawer() {
        String[] word=s.split(" ");
        ScrollView  scrollView = new ScrollView(this);
        mainlinearLayout_ = (LinearLayout) findViewById(R.id.LinLay);
        mainlinearLayout_.removeAllViews();
        scrollView.removeAllViews();
        mainlinearLayout_.addView(scrollView);
        LinearLayout  verticalLinearLayout = new  LinearLayout(this);
        verticalLinearLayout.setOrientation(LinearLayout.VERTICAL);
        for (int j = 0; j < 3; j++) {
            LinearLayout horizontalChildLinearLayout = new LinearLayout(this);
            horizontalChildLinearLayout.setOrientation(LinearLayout.HORIZONTAL);

            for (int i = 1; i < word.length; i++) {
                final TextView textView = new TextView(this);
                textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
                textView.setTextSize(17);
                textView.setPadding(5, 5, 5, 5);
                textView.setText(word[i - 1].toString());


                textView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        Toast.makeText(getApplicationContext(), textView.getText().toString(), Toast.LENGTH_LONG).show();
                    }
                });
                horizontalChildLinearLayout.addView(textView);
            }
            verticalLinearLayout.addView(horizontalChildLinearLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        }
        scrollView.addView(verticalLinearLayout);
    }

谢谢。

线性布局以编程方式添加scrollView

5 个答案: