如何在Android中显示进度对话框？

How to show progress dialog in Android?

提问by Jave

I want to show ProgressDialogwhen I click on Login button and it takes time to move to another page. How can I do this?

我想ProgressDialog在我点击登录按钮时显示，移动到另一个页面需要时间。我怎样才能做到这一点？

采纳答案by Praveenkumar

You better try with AsyncTask

你最好试试AsyncTask

Sample code -

示例代码 -

private class YourAsyncTask extends AsyncTask<Void, Void, Void> {
    private ProgressDialog dialog;

    public YourAsyncTask(MyMainActivity activity) {
        dialog = new ProgressDialog(activity);
    }

    @Override
    protected void onPreExecute() {
        dialog.setMessage("Doing something, please wait.");
        dialog.show();
    }
    @Override
    protected Void doInBackground(Void... args) {
        // do background work here
        return null;
    }
    @Override
    protected void onPostExecute(Void result) {
         // do UI work here
        if (dialog.isShowing()) {
            dialog.dismiss();
        }
    }
}

Use the above code in your Login Button Activity. And, do the stuff in doInBackgroundand onPostExecute

在您的登录按钮活动中使用上述代码。并且，在doInBackground和做这些事情onPostExecute

Update:

更新：

ProgressDialogis integrated with AsyncTaskas you said your task takes time for processing.

ProgressDialog集成了AsyncTask如你所说你的任务需要时间进行处理。

Update:

更新：

ProgressDialogclass was deprecated as of API 26

ProgressDialog自 API 26 起不推荐使用类

回答by Jave

ProgressDialog pd = new ProgressDialog(yourActivity.this);
pd.setMessage("loading");
pd.show();

And that's all you need.

这就是你所需要的。

回答by Abhishek Punia

To use ProgressDialoguse the below code

要使用ProgressDialog使用下面的代码

ProgressDialog progressdialog = new ProgressDialog(getApplicationContext());
progressdialog.setMessage("Please Wait....");

To start the ProgressDialoguse

开始ProgressDialog使用

progressdialog.show();

progressdialog.setCancelable(false);is used so that ProgressDialogcannot be cancelled until the work is done.

progressdialog.setCancelable(false);使用，以便ProgressDialog在工作完成之前无法取消。

To stop the ProgressDialoguse this code (when your work is finished):

要停止ProgressDialog使用此代码（当您的工作完成时）：

progressdialog.dismiss();`

回答by Jay Mayu

Point one you should remember when it comes to Progress dialogis that you should run it in a separate thread. If you run it in your UI thread you'll see no dialog.

当谈到“进度”对话框时，您应该记住的第一点是您应该在单独的线程中运行它。如果您在 UI 线程中运行它，您将看不到对话框。

If you are new to Android Threadingthen you should learn about AsyncTask. Which helps you to implement a painless Threads.

如果您不熟悉Android 线程，那么您应该了解AsyncTask。这可以帮助您实现无痛 Threads。

sample code

示例代码

private class CheckTypesTask extends AsyncTask<Void, Void, Void>{
        ProgressDialog asyncDialog = new ProgressDialog(IncidentFormActivity.this);
        String typeStatus;


        @Override
        protected void onPreExecute() {
            //set message of the dialog
            asyncDialog.setMessage(getString(R.string.loadingtype));
            //show dialog
            asyncDialog.show();
            super.onPreExecute();
        }

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

            //don't touch dialog here it'll break the application
            //do some lengthy stuff like calling login webservice

            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            //hide the dialog
            asyncDialog.dismiss();

            super.onPostExecute(result);
        }

}

Good luck.

祝你好运。

回答by Chirag Patel

Simple coding in your activitylike below:

activity像下面这样的简单编码：

private ProgressDialog dialog = new ProgressDialog(YourActivity.this);    
dialog.setMessage("please wait...");
dialog.show();
dialog.dismiss();

回答by Md. Ilyas Hasan Mamun

Declare your progress dialog:

声明您的进度对话框：

ProgressDialog progressDialog;  

To start the progress dialog:

要启动进度对话框：

progressDialog = ProgressDialog.show(this, "","Please Wait...", true);  

To dismiss the Progress Dialog :

要关闭进度对话框：

 progressDialog.dismiss();

回答by Aristo Michael

This is the good way to use dialog

这是使用对话框的好方法

private class YourAsyncTask extends AsyncTask<Void, Void, Void> {

   ProgressDialog dialog = new ProgressDialog(IncidentFormActivity.this);

   @Override
    protected void onPreExecute() {
        //set message of the dialog
        dialog.setMessage("Loading...");
        //show dialog
        dialog.show();
        super.onPreExecute();
    }

   protected Void doInBackground(Void... args) {
    // do background work here
    return null;
   }

   protected void onPostExecute(Void result) {
     // do UI work here
     if(dialog != null && dialog.isShowing()){
       dialog.dismiss()
     }

  }
}

回答by Kush

when you call in oncreate()

当你调用 oncreate()

new LoginAsyncTask ().execute();

Here how to use in flow..

这里如何在流中使用..

ProgressDialog progressDialog;

  private class LoginAsyncTask extends AsyncTask<Void, Void, Void> {
  @Override
    protected void onPreExecute() {
        progressDialog= new ProgressDialog(MainActivity.this);
        progressDialog.setMessage("Please wait...");
        progressDialog.show();
        super.onPreExecute();
    }

     protected Void doInBackground(Void... args) {
        // Parsse response data
        return null;
     }

     protected void onPostExecute(Void result) {
        if (progressDialog.isShowing())
                        progressDialog.dismiss();
        //move activity
        super.onPostExecute(result);
     }
 }

回答by NinjaCowgirl

ProgressDialog is now officially deprecated in Android O. I use DelayedProgressDialog from https://github.com/Q115/DelayedProgressDialogto get the job done.

ProgressDialog 现在在 Android O 中正式弃用。我使用来自https://github.com/Q115/DelayedProgressDialog 的DelayedProgressDialog来完成工作。

Usage:

用法：

DelayedProgressDialog progressDialog = new DelayedProgressDialog();
progressDialog.show(getSupportFragmentManager(), "tag");

回答by Anish Arya

ProgressDialog is deprecated since API 26

自 API 26 起不推荐使用 ProgressDialog

still you can use this:

你仍然可以使用这个：

public void button_click(View view)
{
    final ProgressDialog progressDialog = ProgressDialog.show(Login.this,"Please Wait","Processing...",true);
}