当满足某些条件时，如何防止出现警报对话框

Question

//NotificationPermission Dialog
private void notificationPermissionDialog(){
AlertDialog dialog = new AlertDialog.Builder(getActivity())
.setCancelable(false)
.setMessage("Do you want to Enable Notifications?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
savePermissionInPreferences("Yes");
dialogInterface.dismiss();
}
}).setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
savePermissionInPreferences("No");
dialogInterface.dismiss();
}
}).show();
}
//Save Notification Permission in Preferences
private void savePermissionInPreferences(String isNotificationAllowed){
SharedPreferences sharedPreferences;
sharedPreferences = getContext().getSharedPreferences("PermissionPref", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("isNotificationAllowed", isNotificationAllowed);
editor.apply();
}

我创建了一个对话，当片段打开时会出现，如果我点击"否"，则请求许可，其值将保存在共享的首选项中，以防止其再次出现，但当我在同一活动中替换我的片段时，对话会一次又一次出现。请任何人都能引导我通过它。提前谢谢。

Answer 1

所以你可以在下面做一些类似的事情

private void notificationPermissionDialog(){
SharedPreferences sharedPreferences = getSharedPreferences("PermissionPref", Context.MODE_PRIVATE);//Add these
String permission = sharedPreferences.getString("isNotificationAllowed", "");
//Add this line
if(!permission == "No"){ 
AlertDialog dialog = new AlertDialog.Builder(getActivity())
.setCancelable(false)
.setMessage("Do you want to Enable Notifications?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
savePermissionInPreferences("Yes");
dialogInterface.dismiss();
}
}).setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
savePermissionInPreferences("No");
dialogInterface.dismiss();
}
}).show();
}
}
//Save Notification Permission in Preferences
private void savePermissionInPreferences(String isNotificationAllowed){
SharedPreferences sharedPreferences;
sharedPreferences = getContext().getSharedPreferences("PermissionPref", 
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("isNotificationAllowed", isNotificationAllowed);
editor.apply();
}

如果用户对"警报"对话框选择"否"，它将不会再次出现。