当尝试读取editText内容时,AlertDialog(Material)崩溃。
AlertDialog:
MaterialAlertDialogBuilder(activity)
.setTitle(title)
.setMessage(message)
.setView(R.layout.dialog_settings_entry)
.setPositiveButton(getString(R.string.text_change)) { dialog, which ->
etUserInput.hint = message
sgr = etUserInput.text.toString() // << crashes here
dialog.dismiss()
}
.setNegativeButton(getString(android.R.string.cancel)) { dialog, _ ->
dialog.dismiss()
}
.show()
单击肯定按钮时,结果如下:
java.lang.IllegalStateException: etUserInput must not be null
at com.home.profile.SettingsFragment$buildAlertDialog$1.onClick(SettingsFragment.kt:332)
at androidx.appcompat.app.AlertController$ButtonHandler.handleMessage(AlertController.java:167)
etUserInput 是位于单独布局中的简单editText。 不确定崩溃原因。希望对它有任何见识或任何有用的材料示例。
答案 0 :(得分:4)
将DialogInterface
投射到AlertDialog
,然后使用findViewById
。
科特琳:
val et = (dialog as? AlertDialog)?.findViewById<EditText>(R.id.etUserInput)
val text = et?.text.toString()
-
Java:
EditText et = ((AlertDialog)dialog).findViewById(R.id.etUserInput);
String text = et.getText().toString();
-
MaterialAlertDialogBuilder(activity)
.setTitle(title)
.setMessage(message)
.setView(R.layout.dialog_settings_entry)
.setPositiveButton(getString(R.string.text_change)) { dialog, which ->
val text = (dialog as? AlertDialog)?.findViewById<EditText>(R.id.etUserInput)?.text?.toString()
dialog.dismiss()
}
.setNegativeButton(getString(android.R.string.cancel)) { dialog, _ ->
dialog.dismiss()
}
.show()