我在AlertDialog中添加了一个AlertDialog.OnDismissListener
。当调用dialog.cancel()
时,将调用onCancelListener
和onDismissListener
。
这是预期的行为吗?当调用onDismissListener
而不是dialog.cancel()
时,我能防止调用dialog.dismiss()
吗?
有一些代码:
AlertDialog.Builder builder = new AlertDialog.Builder(activity)
.setView(view)
.setTitle(title)
.setIcon(icon)
.setCancelable(true)
.setNegativeButton(R.string.cancel, (d, i) -> {
d.cancel();
Log.d(TAG, "Cancel pressed!");
})
.setPositiveButton(positiveBtnText, (d, i) -> {
d.dismiss();
Log.d(TAG, "Dismiss pressed!");
});
AlertDialog dialog = builder.create();
dialog.setOnCancelListener(dialogInterface -> {
Log.d(TAG, "Dialog canceled!");
});
dialog.setOnDismissListener(dialogInterface -> {
Log.d(TAG, "Dialog dismissed!");
});
意外行为也会出现在日志中:
03-25 05:15:31.895 25985-25985/io.l.l D/io.l.l.u.ArrayAdapter: Cancel pressed!
03-25 05:15:31.895 25985-25985/io.l.l D/io.l.l.u.ArrayAdapter: Operation canceled!
03-25 05:15:31.896 25985-25985/io.l.l D/io.l.l.u.ArrayAdapter: Dismiss called!
最佳答案
没有理由同时使用setNegativeButton
/setPositiveButton
和设置OnCancelListener
/OnDismissListener
。
删除:
dialog.setOnCancelListener(dialogInterface -> {
Log.d(TAG, "Dialog canceled!");
});
dialog.setOnDismissListener(dialogInterface -> {
Log.d(TAG, "Dialog dismissed!");
});
并添加当用户在提供给
setPositiveButton
的侦听器中按ok时要运行的代码:// ...
.setPositiveButton(positiveBtnText, (d, i) -> {
// Your code that reacts to the user pressing "OK" goes here!
Log.d(TAG, "Dismiss pressed!");
});
类似地,添加当用户在提供给
setNegativeButton
的侦听器中按cancel时要运行的代码:.setNegativeButton(R.string.cancel, (d, i) -> {
// Your code that reacts to the user pressing "Cancel" goes here!
Log.d(TAG, "Cancel pressed!");
})