问题描述
我正在地图片段内创建一个过滤器，因此我需要一个弹出窗口，用户可以在其中设置过滤器。在弹出窗口内，我想添加一个下拉微调器，但每次单击微调器时，应用程序都会崩溃并收到此错误：
2021-02-18 15:13:58.162 31233-31233/com.example.discoverme E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.discoverme,PID: 31233
android.view.WindowManager$BadTokenException: Unable to add window -- token android.view.ViewRootImpl$WEx@6667b18 is not valid; is your activity running?
at android.view.ViewRootImpl.setView(ViewRootImpl.java:702)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:342)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:94)
at android.widget.PopupWindow.invokePopup(PopupWindow.java:1391)
at android.widget.PopupWindow.showAsDropDown(PopupWindow.java:1247)
at androidx.appcompat.widget.AppCompatPopupWindow.showAsDropDown(AppCompatPopupWindow.java:77)
at androidx.core.widget.PopupWindowCompat.showAsDropDown(PopupWindowCompat.java:69)
at androidx.appcompat.widget.ListPopupWindow.show(ListPopupWindow.java:754)
at androidx.appcompat.widget.AppCompatSpinner$DropdownPopup.show(AppCompatSpinner.java:1050)
at androidx.appcompat.widget.AppCompatSpinner.showPopup(AppCompatSpinner.java:608)
at androidx.appcompat.widget.AppCompatSpinner.performClick(AppCompatSpinner.java:452)
at android.view.View$PerformClick.run(View.java:22433)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6247)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
有人知道如何解决这个问题吗？
我在我的地图片段 onCreate 函数中调用 PopUp 类，如下所示：
val popupButton : Button= rootView.findViewById(R.id.filter_button);
popupButton.setonClickListener { v ->
val popUpClass = PopUpClass()
popUpClass.showPopupWindow(v)
}
这是弹出窗口类：
import android.annotation.SuppressLint
import android.content.Context
import android.view.Gravity
import android.view.LayoutInflater
import android.view.View
import android.widget.*
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.internal.ViewUtils.getContentView
import com.google.android.material.slider.RangeSlider
class PopUpClass {
//PopupWindow display method
@SuppressLint("ClickableViewAccessibility","RestrictedApi","InflateParams")
fun showPopupWindow(view: View) {
//Create a View object yourself through inflater
val inflater =
view.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
val popupView: View = inflater.inflate(R.layout.popup_layout,null)
//val slider: RangeSlider = popupView.findViewById(R.id.slider)
//slider.setValues(1.0f,5.0f)
val spinner: Spinner = popupView.findViewById(R.id.filter_spinner)
getContentView(spinner)?.let {
ArrayAdapter.createFromresource(
it.getContext(),R.array.auswahl_filter,android.R.layout.simple_spinner_item
).also { adapter ->
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
// Apply the adapter to the spinner
spinner.adapter = adapter
spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
override fun onItemSelected(
parent: AdapterView<*>?,view: View?,position: Int,id: Long
) {
val selectedItem = parent?.getItemAtPosition(position).toString()
}
override fun onnothingSelected(parent: AdapterView<*>?) {
}
}
}
}
//Specify the length and width through constants
val width = LinearLayout.LayoutParams.MATCH_PARENT
val height = LinearLayout.LayoutParams.MATCH_PARENT
//Make Inactive Items Outside Of PopupWindow
val focusable = true
//Create a window with our parameters
val popupWindow = PopupWindow(popupView,width,height,focusable)
//Set the location of the window on the screen
popupWindow.showAtLocation(view,Gravity.CENTER,0)
//Initialize the elements of our window,install the handler
val test2 = popupView.findViewById<TextView>(R.id.titleText)
//test2.setText(R.string.textTitle)
val buttonEdit = popupView.findViewById<Button>(R.id.messageButton)
buttonEdit.setonClickListener { //As an example,display the message
Toast.makeText(view.context,"Wow,popup action button",Toast.LENGTH_SHORT).show()
}
//Handler for clicking on the inactive zone of the window
popupView.setonTouchListener { v,event -> //Close the window when clicked
popupWindow.dismiss()
true
}
}
}
这是 popUp.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:gravity="center">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="5dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:id="@+id/titleText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="10dp"
android:text="Bearbeite deine Suche"
android:textSize="20sp"
android:textStyle="bold" />
<Spinner
android:id="@+id/filter_spinner"
android:layout_width="match_parent"
android:layout_height="51dp"
android:layout_marginTop="20dp"
android:spinnerMode="dropdown"/>
<Button
android:id="@+id/messageButton"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginTop="80dp"
android:text="Filter anwenden" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
解决方法
因此，我通过将 getContentView(spinner)? 更改为 getConentView(view)? 并将 android:spinnerMode="dialog" 添加到我的 xml 中的微调器来解决此问题。