Android Studio Kotlin editText不起作用

时间:2018-07-08 11:04:17

标签: android kotlin android-edittext

在我的Kotlin android项目(完成后应该是ToDo List应用程序)中,我在弹出的窗口中添加了editText。起初,键盘甚至没有打开。然后我将这段代码添加到Main Activity(称为ToDo)中:

val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as 
InputMethodManager
imm!!.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0)

现在,软键盘打开,但是当我键入内容时,没有文本输入到editText中。我尝试添加requestFocus  到弹出式xml中的editText,这没用。

我在模拟器和真实电话上都尝试过。此处针对类似问题的其他解决方案均无效。回复时,请记住,我需要Kotlin中的解决方案。请帮助我使editText起作用。谢谢。这是我的活动代码:

 override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_to_do)
    setSupportActionBar(toolbar)



    fab.setOnClickListener {

        val inflater: LayoutInflater = getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

        val view = inflater.inflate(R.layout.todopopup, null)

        val popupWindow = PopupWindow(
                view, 
                ConstraintLayout.LayoutParams.WRAP_CONTENT, 
                ConstraintLayout.LayoutParams.WRAP_CONTENT) 




        TransitionManager.beginDelayedTransition(coordinatorLayout)
        popupWindow.showAtLocation(
                coordinatorLayout, 
                Gravity.CENTER, 
                0, 
                0 
        )

        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm!!.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0)



        val cancelbutton = view.findViewById<Button>(R.id.cancelbutton)
        cancelbutton.setOnClickListener {
            popupWindow.dismiss()
        }
    }
}

这是我的活动布局文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ToDo">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appBarLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:visibility="visible"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include
    android:id="@+id/include"
    layout="@layout/content_to_do"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:srcCompat="@drawable/fab"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    android:layout_marginEnd="16dp"
    android:layout_marginBottom="16dp"
    app:elevation="4dp"/>

<EditText
    android:id="@+id/editText2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="textPersonName"
    android:text="Name"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"/>

</android.support.constraint.ConstraintLayout>

这是我的弹出窗口xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#FFFFFF"
android:elevation="16dp"
>


<EditText
    android:id="@+id/editText"
    android:layout_width="384dp"
    android:layout_height="46dp"
    android:inputType="text"
    android:textColor="#000000"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:layout_marginTop="8dp"
    android:paddingEnd="8dp"
    android:paddingStart="8dp"
    android:layout_marginBottom="8dp"
    app:layout_constraintTop_toBottomOf="@+id/textView"


/>

<Button
    android:id="@+id/addtodobutton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Add ToDo"
    android:layout_marginEnd="8dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/editText"
    android:background="#FFFFFF"/>
<Button
    android:id="@+id/cancelbutton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="cancel"
    app:layout_constraintTop_toBottomOf="@+id/editText"
    app:layout_constraintEnd_toStartOf="@id/addtodobutton"

    android:background="#FFFFFF"

/>

<TextView
    android:id="@+id/textView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginBottom="8dp"
    android:text=" Add a ToDo"
    android:textColor="#000000"
    android:textSize="24sp"
    app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

我是android开发的新手,所以请以一种易于理解的方式解释您的答案。我只希望editText工作。问题可能与editText在弹出窗口中有关吗?我希望代码在这里正确显示。感谢您提前答复!

1 个答案:

答案 0 :(得分:0)

在FAB的click listener块的末尾添加这两行。

popupWindow.isFocusable = true
popupWindow.update() // This line updates the state of the popup window.