Android的动态表格布局 - 添加视图抛出异常IllegalStateException异常（孩子已经有父） [英] Android dynamic table layout - adding views throws exception IllegalStateException (child already has a parent)

问题描述

创建Java中的布局的要求是不知道作为designtime TableLayouts的数目

我得到一个 IllegalStateException异常告诉我删除其分配给另一个查看（从它的当前父）前父母，当我打电话 createPlayerTables（）

该异常被抛出在这个循环中的第一行，当我尝试从ImageViews的列表中添加的ImageView到第一的TableRow：

 的for（int i = 0;我3;;我++）{
    tableRowsLst.get（0）.addView（（ImageView的）imageViewsLst.get（ⅰ））;
    tableRowsLst.get（1）.addView（（ImageView的）imageViewsLst.get第（i + 3））;
}
 

该错误表明ImageView的有已经被添加到一个ViewGroup中，但看到code以下，我创造新的ImageViews，我只把它们添加到一个ViewGroup中的行它的错误时，所以我不知道为什么它的失败。

  //名单，其中，ImageView的＆GT; imageViewsLst =新...
//名单，其中，的TableRow＆GT; tableRowsLst =新...

/ **
*初始化的TableLayouts，每球员
* /
私人TableLayout createPlayerTables（INT playerNum）{
    ...

    的for（int i = 0; I＆LT; 6，我++）{
        imageViewsLst.add（新ImageView的（这个））;
        ...
    }

    的for（int i = 0;我3;;我++）{
        tableRowsLst.add（新的TableRow（本））;
        ...
    }

    的for（int i = 0;我3;;我++）{
        tableRowsLst.get（0）.addView（（ImageView的）imageViewsLst.get（ⅰ））;
        tableRowsLst.get（1）.addView（（ImageView的）imageViewsLst.get第（i + 3））;
    }

    ...
}
 

解决方案

在这个循环：

 的for（int i = 0;我3;;我++）{
   tableRowsLst.add（新的TableRow（本））;
   tableRowsLst.get（我）.setLayoutParams（
       新TableLayout.LayoutParams（LayoutParams.FILL_PARENT，dipToPixels（55）））;
   tableRowsLst.get（ⅰ）.setOrientation（LinearLayout.HORIZONTAL）;
}
 

你只是不断添加新的 TableRows 到 tableRowsLst ，但你总是只用前三个元素。

清除列表循环之前：

  tableRowsLst.clear（）;
 

Creating a layout in Java as the number of TableLayouts required is not known as designtime.

I get an IllegalStateException telling me to remove the View (from it's current parent) before assigning it to another parent, when I call createPlayerTables()

The exception is thrown at the first line in this loop, when I try to add an ImageView from the List of ImageViews to the first TableRow:

for (int i = 0; i < 3; i++) {
    tableRowsLst.get(0).addView((ImageView) imageViewsLst.get(i));
    tableRowsLst.get(1).addView((ImageView) imageViewsLst.get(i+3));
}

The error suggests that the ImageView has already been added to a ViewGroup, but seeing the code below, I create new ImageViews, and I only add them to an ViewGroup at the line that it errors at, so I'm not sure why it's failing.

// List<ImageView> imageViewsLst = new ...
// List<TableRow> tableRowsLst = new ...

/**
* Initialises the TableLayouts, one per player
*/ 
private TableLayout createPlayerTables(int playerNum) {
    ...

    for (int i = 0; i < 6; i++) {
        imageViewsLst.add(new ImageView(this));
        ...
    }

    for (int i = 0; i < 3; i++) {
        tableRowsLst.add(new TableRow(this));
        ...
    }

    for (int i = 0; i < 3; i++) {
        tableRowsLst.get(0).addView((ImageView) imageViewsLst.get(i));
        tableRowsLst.get(1).addView((ImageView) imageViewsLst.get(i+3));
    }

    ...
}

解决方案

In this loop:

for (int i = 0; i < 3; i++){
   tableRowsLst.add(new TableRow(this));
   tableRowsLst.get(i).setLayoutParams(
       new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, dipToPixels(55)));
   tableRowsLst.get(i).setOrientation(LinearLayout.HORIZONTAL);
}

you just keep adding new TableRows to tableRowsLst, but you always only use the first three elements.

Clear the list before the loop:

tableRowsLst.clear();

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