使activitys之间的过渡 [英] Make a transition between activitys

问题描述

我需要做一个过渡画面，OU只放一个对话框，因为应用程序给黑屏时创建数据库。

我有谷歌，并找到一些这方面的解决方案。其中的话，是只放一个进度对话框创建数据库时。

我的问题，新手的问题是，我在哪里可以把进度对话框。

A - > BlackScreen - > B，其中A是inicial菜单，和B等画面。我试图把对话框上的和/或B和不工作。所以，我在哪里可以把进度对话框的code，所以它显示了BlackScreen？

解决方案

 对于您必须使用异步任务：类DownloadAsyncTask扩展的AsyncTask＆LT;字符串，字符串，太虚＆GT;
    {        ProgressDialog progressDialog;
        @覆盖
        在preExecute保护无效（）{
            super.on preExecute（）;
            progressDialog = ProgressDialog.show（Login.this，，请稍候...）;
        }        @覆盖
        保护无效doInBackground（字符串...为arg0）{            //做你的工作
        }        @覆盖
        保护无效onProgressUpdate（字符串值...）{
            super.onProgressUpdate（值）;
        }        @覆盖
        保护无效onPostExecute（虚空结果）{
            super.onPostExecute（结果）;
            progressDialog.dismiss（）;
        }    }
 

//创建对象

DownloadAsyncTask downloadAsyncTask =新DownloadAsyncTask（）;
downloadAsyncTask.execute（）;

现在到你的工作的完成它显示进度对话框内doInbackground写你的逻辑和onPostExecute关闭该对话框并调用其他活动的意图。

I need to make a transition screen, ou just put a dialog, because the app give a black screen when is creating the database.

I have google, and find some solutions for this. One of then, is just put a progress dialog when the database is been created.

My problem, and newbie question is, where do i put the progress dialog.

A -> BlackScreen -> B where A is the inicial menu, and B the other screen. I have tried to put the dialog on A and/or in B and dont work. So where can i put the code of the progress dialog, so it shows in the BlackScreen ?

解决方案

For that You have to use Async task : 

class DownloadAsyncTask extends AsyncTask<String, String, Void>
    {

        ProgressDialog progressDialog;


        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDialog = ProgressDialog.show(Login.this, "", "Please Wait ...");
        }



        @Override
        protected Void doInBackground(String... arg0) {

            //Do your Task
        }

        @Override
        protected void onProgressUpdate(String...values){
            super.onProgressUpdate(values);




        }

        @Override
        protected void onPostExecute(Void result){
            super.onPostExecute(result);
            progressDialog.dismiss();
        }

    }

//Create the Object

DownloadAsyncTask downloadAsyncTask = new DownloadAsyncTask(); downloadAsyncTask.execute();

now till your work get's completed it shows progress dialog inside the doInbackground write your logic and onPostExecute dismiss the dialog and call Intent of other Activity.

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