如何在Android中执行ListView元素的单击按钮

时间:2019-02-17 13:27:30

标签: android listview kotlin

我有listView,每个元素包含1个按钮 enter image description here

当用户按下ListView的某个元素(而不是按钮)时,它可以正常工作,并且android显示Toast:“未单击按钮,$ position可以正常工作”

但是当在特定的listView元素中单击按钮时,我还需要烤面包(并获取按钮的位置)。我尝试在view.imageViewButton.setOnClickListener内使用listV.setOnItemClickListener,但是在这种情况下,只有在我单击按钮左侧的空白后,该按钮才起作用。

listV.setOnItemClickListener { parent, view, position, id ->
  //I tried you use comented line to solwe my problem
  //view.imageViewButton.setOnClickListener { Toast.makeText(this, "button $position is clicked",Toast.LENGTH_SHORT).show() }
  Toast.makeText(this, "not button clicked, works correctly", Toast.LENGTH_SHORT).show()
} 

onCreate(savedInstanceState: Bundle?)开始时我应该如何激活按钮?

我的Kotlin代码:

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    var db = DataBaseHelper(this)
    var cursor = db.returnLines()

    listV.adapter = SimpleCursorAdapter(this,
        R.layout.view_holder,
        cursor,
        arrayOf("imia"),
        intArrayOf(R.id.listNameView),
        0)

    listV.setOnItemClickListener { parent, view, position, id ->

      //I tried you use comented line to solwe my problem
      //view.imageViewButton.setOnClickListener { Toast.makeText(this, "button $position is clicked",Toast.LENGTH_SHORT).show() }
      Toast.makeText(this, "not button clicked, $position works correctly", Toast.LENGTH_SHORT).show()
    }
}

1 个答案:

答案 0 :(得分:3)

您可以扩展SimpleCursorAdapter来将点击侦听器设置为特定视图

class CustomAdapter(context: Context?, layout: Int, c: Cursor?, from: Array<out String>?, to: IntArray?) : SimpleCursorAdapter(context, layout, c, from, to) {

    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        return super.getView(position, convertView, parent).apply {
            if (convertView == null) { // This means newView()
                findViewById<View>(R.id.image_view).setOnClickListener {
                    Toast.makeText(context, "image view clicked pos=$position")
                }
            }
        }
    }
}

但是我建议您使用RecyclerView而不是ListView。

ListView是老式的,不建议使用

希望它会有所帮助:)