对话没有显示 [英] Dialog didn't show

问题描述

我试图弹出一个对话框，当用户在备份数据库的覆盖，所以我写了这篇code，但它没有工作：

I am trying to pop up a dialog when the user overwrite on a backup database so I wrote this code but it didn't work:

$if(backupDB.exists()){
    AlertDialog.Builder builder = new AlertDialog.Builder(getBaseContext());
    builder.setTitle("Backup database...");
    builder.setMessage("You have already backup the database, do you want to overwrite?");

    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {
           Intent i=new Intent(getBaseContext(),FinancialSecretary.class);
           finish();
           startActivity(i);
        }
    });
    AlertDialog dialog = builder.create();
}

是什么wronge？

what is wronge?

推荐答案

用于此code只是尝试了这一点：

Used for this code just try this out:

AlertDialog.Builder builder = new AlertDialog.Builder(ActivityName.this);

和U无论需要实施的方法和最后一组显示对话框，

And u whatever require for method implement and last one set to show dialog,

builder.show();

这篇关于对话没有显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！