Android ProgressDialog. show (), unable to display the waiting box, Android progressdialog

Android ProgressDialog. show (), unable to display the waiting box, Android progressdialog

First, I will post out my solution code:

Package com. park;

Import java. io. IOException;
Import java. io. InputStream;
Import java. lang. reflect. InvocationTargetException;
Import java. lang. reflect. Method;
Import java. util. Objects;
Import java. util. Timer;
Import java. util. TimerTask;
Import java. util. UUID;

Import android. app. Activity;
Import android. app. ProgressDialog;
Import android. content. Intent;
Import android. OS. AsyncTask;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. OS. Message;
Import android. OS. ParcelUuid;
Import android. text. format. Time;
Import android. util. Log;
Import android. view. View;
Import android. view. View. OnClickListener;
Import android. view. Window;
Import android. webkit. lelemessage. MessageLevel;
Import android. widget. ImageView;
Import android. widget. TextView;
Import android. bluetooth .*;

Import android. widget. Toast;

/**

* Created by lenovo on 2015/5/25.
*/
Public class CommunityParking extends Activity implements View. OnClickListener {

Private ProgressDialog progressDialog, progressDialog2, progressDialog3;
Private int parkNum = 50;
Private ImageView back, around_parking, zero, ten, oneHour, threeHour;
Private Intent intent;
Private TextView num;
Private Handler handler;

@ Override
Protected void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

RequestWindowFeature (Window. FEATURE_NO_TITLE );

SetContentView (R. layout. community_parking );

Num = (TextView) findViewById (R. id. num );

Int a = 10;

Back = (ImageView) findViewById (R. id. back );

Around_parking = (ImageView) findViewById (R. id. around_parking );

Back. setOnClickListener (this );

Around_parking.setOnClickListener (this );

Timer timer = new Timer ();

TimerTask timerTask = new TimerTask (){

@ Override

Public void run (){

// TODO Auto-generated method stub

RunOnUiThread (new Runnable (){

Public void run (){

ParkNum ++;

Num. setText ("" + parkNum );

ProgressDialog. dismiss ();

}

});

}

};

ProgressDialog = ProgressDialog. show (this, "", "loading data. Please wait ...");

Timer. schedule (timerTask, 4000,400 0 );

Zero = (ImageView) findViewById (R. id. zero );

Ten = (ImageView) findViewById (R. id. ten );

OneHour = (ImageView) findViewById (R. id. oneHour );

OneHour. setOnClickListener (new test ());

ThreeHour = (ImageView) findViewById (R. id. threeHour );

ThreeHour. setOnClickListener (new test2 ());

}

@ Override
Public void onClick (View v ){

Switch (v. getId ()){

Case R. id. back:

Intent = new Intent (this, MainActivity. class );

StartActivity (intent );

Break;

Case R. id. around_parking:

Intent = new Intent ();

Intent. setAction ("android. intent. action. AROUPARK ");

StartActivity (intent );

Break;

}

}

Class test implements OnClickListener {

@ Override

Public void onClick (View v ){

// TODO Auto-generated method stub

ProgressDialog2 = ProgressDialog. show (CommunityParking. this, "", "estimated parking space. Please wait ...");

Handler handler = new Handler ();

Handler. postDelayed (new Runnable (){

Public void run (){

ProgressDialog2.dismiss ();

Ten. setVisibility (View. VISIBLE );

}

},1000 );

}

}

Class test2 implements OnClickListener {

@ Override

Public void onClick (View v ){

// TODO Auto-generated method stub

ProgressDialog3 = ProgressDialog. show (CommunityParking. this, "", "estimated parking space. Please wait ...");

Handler handler = new Handler ();

Handler. postDelayed (new Runnable (){

Public void run (){

ProgressDialog3.dismiss ();

Zero. setVisibility (View. VISIBLE );

}

},1000 );

}

}

}

Yes. The progressdialog is executed in oncreate. show (); can display the progress box normally, but when I set a click event for an imageview in the xml page, call progressdialog. show () cannot display the progress box. At the beginning, I defined click events as follows. I asked CommunityParking implements Onclicklistner to process click monitoring events in a unified manner, but I found that this method could not display the waiting dialog box, then I use new test () to create a listener class for click events, and then the wait dialog box is displayed. I still don't know why, but the problem has been solved.

Another point is the thread I used at the beginning. sleep (). pause the thread for two seconds, but this will always lead to errors, and the waiting box cannot be displayed. Later I searched stackoverflow, which said to use handler to process the program waiting for the problem and finally solve the problem. For details, refer to my code and leave a message if you have any questions.