满足某些条件时如何防止出现警报对话框？答案

【问题标题】：How to prevent alert dialog from appearing when some condition is fulfilled?满足某些条件时如何防止出现警报对话框？
【发布时间】：2021-06-17 14:13:07
【问题描述】：

 //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();
}

我创建了一个对话框，在打开片段时出现，如果我点击否，它的值会保存在共享首选项中以防止它再次出现，但是当我在同一活动中替换我的片段时，对话框会一次又一次地出现.请任何人都可以指导我完成它。提前致谢。

【问题讨论】：

标签： android-studio android-fragments android-activity sharedpreferences android-alertdialog

【解决方案1】：

所以你可以做下面的事情

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。

【讨论】：