如何在Android中从动态生成的表格中点击时获取列号？

huangapple
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英文:

How to get column number on click from dynamically generated table in Android?

问题

我有一个在应用程序中以编程方式生成的表格。我可以获取所选行的位置并将其分配给一个变量，但我不确定如何执行相当于列的操作，就像这样。我真正需要知道的是如何像我在这里对行进行的那样，在点击时获取列号：

  1. fun createTable(rows: Int, cols: Int) {
  2.         /* 这里，'i'代表行数，由应用程序中活动的位置列表的长度确定。 */
  3.         for (i in 0 until locationList.size) {
  4.             /* 实例化将用于生成每个表格的行。 */
  5.             val row = TableRow(this)
  7.             /* 设置用于包含表格的textView的基本布局参数。 */
  8.             row.layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
  10.             row.setOnClickListener {
  11.                 selectedRow = i.toString().toInt()
  13.                 if (locationList[selectedRow].entranceNoteArray.size == 0) {
  14.                     showAlert("此位置没有关联的过渡。您只能向现有过渡添加注释。")
  15.                 } else {
  16.                     isEnterOrExit()
  17.                 }
  18.             }
  20.             row.gravity = Gravity.CENTER
  22.             for (j in 0 until columns) {
  23.                 var rowIterator = 0
  24.                 val textView = TextView(this)
  26.                 textView.apply {
  27.                     // 美观/UI相关代码
  28.                     textView.setPadding(10, 5, 10, 5)
  29.                     layoutParams = TableRow.LayoutParams(350, TableRow.LayoutParams.WRAP_CONTENT)
  30.                     textView.setTextColor(Color.DKGRAY)
  31.                     textView.gravity = Gravity.CENTER
  32.                     textView.textSize = 12F
  34.                     /* 这个决策结构的目的是根据列单元格'j'表示的内容来正确填充表格的单元格。当j = 0且i = 0时，已选择第一行的第一列 - 因此，应将翻转的locationList中第一个位置的第一个值（消息）放在那里。 */
  35.                     if (j == 0) {
  36.                         text = locationList[i].message
  37.                         textView.setTypeface(null, Typeface.BOLD)
  38.                     } else if (j == 1) {
  39.                         text = locationList[i].entered
  40.                         textView.setTypeface(null, Typeface.NORMAL)
  41.                     } else if (j == 2) {
  42.                         text = locationList[i].exited
  43.                     }
  44.                 }
  45.                 row.addView(textView)
  46.                 rowIterator++
  47.             }
  48.             tableLayout.addView(row)
  49.         }
  50.         logLayout.addView(tableLayout)
  51.     }

有没有一种简单的方法来做到这一点，还是我需要从视图本身获取点击坐标，以便以迂回的方式实现这一点？

英文:

I have a table that is generated programmatically in an application. I'm able to get the position of a selected row and assign it to a variable, but I'm not sure how to perform the equivalent for columns, like, at all. All I really need to know is how to get the column number on tap like I do with rows here:

  1. fun createTable(rows: Int, cols: Int) {
  2.         /* Here, 'i' represents the number of rows, which is determined by
  3.         * the length of the location list active in the application. */
  4.         for (i in 0 until locationList.size) {
  5.             /* Instantiate the row that will be used to generate each table. */
  6.             val row = TableRow(this)
  8.             /* Set the basic layout parameters for the textView, which is being used to contain the table. */
  9.             row.layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
  11.             row.setOnClickListener {
  12.                 selectedRow = i.toString().toInt()
  14.                 if (locationList[selectedRow].entranceNoteArray.size == 0) {
  15.                     showAlert("There are no transitions associated with this location. You may only add a note to an existent transition.")
  16.                 } else {
  17.                     isEnterOrExit()
  18.                 }
  19.             }
  21.             row.gravity = Gravity.CENTER
  23.             for (j in 0 until columns) {
  24.                 var rowIterator = 0
  25.                 val textView = TextView(this)
  27.                 textView.apply {
  28.                     // Cosmetic/UI Related Code
  29.                     textView.setPadding(10, 5, 10, 5)
  30.                     layoutParams = TableRow.LayoutParams(350, TableRow.LayoutParams.WRAP_CONTENT)
  31.                     textView.setTextColor(Color.DKGRAY)
  32.                     textView.gravity = Gravity.CENTER
  33.                     textView.textSize = 12F
  35.                     /* The purpose of this decision structure is to fill the
  36.                     * table's cells properly based upon which column cell 'j'
  37.                     * represents. When j = 0 and i = 0, the first column of
  38.                     * the first row has been selected - therefore, the first
  39.                     * value (message) of the first location in the reversed
  40.                     * locationList should be placed there. */
  41.                     if (j == 0) {
  42.                         text = locationList[i].message
  43.                         textView.setTypeface(null, Typeface.BOLD)
  44.                     } else if (j == 1) {
  45.                         text = locationList[i].entered
  46.                         textView.setTypeface(null, Typeface.NORMAL)
  47.                     } else if (j == 2) {
  48.                         text = locationList[i].exited
  49.                     }
  50.                 }
  51.                 row.addView(textView)
  52.                 rowIterator++
  53.             }
  54.             tableLayout.addView(row)
  55.         }
  56.         logLayout.addView(tableLayout)
  57.     }

Is there a simple way to do this, or do I need to get the on tap coordinates from the view itself in order to achieve this in a roundabout way?

答案1

得分: 1

如果您想知道在表格中点击了哪个TextView，可以按照以下方式进行操作：

  1. 对于每个TextView，您需要添加一个tag：
  1. textView.tag = "$i $j"

其中，i 表示行数，j 表示列数。

  1. 现在，您可以为每个TextView添加一个监听器：
  1. textView.setOnClickListener {
  2.     val tag = it.tag.toString()
  3.     val row = tag.substring(0, tag.indexOf(' ')).toInt()
  4.     val column = tag.substring(tag.indexOf(' ') + 1).toInt()
  5.     
  6.     // 现在，您知道点击了哪个位置
  7. }
英文:

If You want to know which exactly TextView was clicked in Table You can do this in the following way:

  1. Foreach TextView You have to add tag
  1. textView.tag = "$i $j"

i is the row and j is the column.

  1. Now You can add one listener for every TextView
  1. textView.setOnClickListener {
  2.     val tag = it.tag.toString()
  3.     val row = tag.substring(0, tag.indexOf(' ')).toInt()
  4.     val column = tag.substring(tag.indexOf(' ') + 1).toInt()
  5.             
  6.     //now You know which position was clicked
  7. }

huangapple
  • 本文由 发表于 2020年8月5日 04:15:10
  • 转载请务必保留本文链接：https://go.coder-hub.com/63254440.html
  • android
  • java
  • kotlin
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