) Progressbar in Android

How do I display the progress bar and disable it when the task is not finished? Article The following is a simple example of displaying the entire progress bar after the experiment in other articles:

You can skip the steps for creating an android project and Google it.

The following describes the main activities.
Progressbardemo. JavaCode

2. PackageCom. lveyo. Android. Demo. progressbar;
6. ImportAndroid. App. activity;
8. ImportAndroid. App. progressdialog;
10. ImportAndroid. OS. Bundle;
12. ImportAndroid. OS. Handler;
14. ImportAndroid. OS. message;
16. ImportAndroid. View. view;
18. ImportAndroid. widget. Button;
20. ImportAndroid. widget. textview;
24. Public ClassProgressbardemoExtendsActivity {
28. PrivateTextview statustextview;
30. PrivateButton beginbtn;
32. PrivateProgressdialog;
36. @ Override
38. Public VoidOncreate (bundle savedinstancestate ){
40. Super. Oncreate (savedinstancestate );
42. Setcontentview (R. layout. Main );
44. Statustextview = (textview) findviewbyid (R. Id. status );
46. Beginbtn = (button) findviewbyid (R. Id. beginbtn );
48. Setlistener ();
50. }
54. /** 
56. * Use handler to update the UI 
58. */
60. PrivateHandler handler =NewHandler (){
64. @ Override
66. Public VoidHandlemessage (Message MSG ){
70. // Close progressdialog
72. Progressdialog. Dismiss ();
76. // Update the UI
78. Statustextview. settext ("Completed! ");
80. }};
86. /** 
88. * Click the button event listener. 
90. */
92. Private VoidSetlistener (){
94. Beginbtn. setonclicklistener (NewView. onclicklistener (){
98. @ Override
100. Public VoidOnclick (view v ){
104. // Display progressdialog
106. Progressdialog = progressdialog. Show (progressbardemo.This,"Loading ...","Please wait ...",True,False);
110. // Create a thread
112. NewThread (){
116. @ Override
118. Public VoidRun (){
120. // Method that requires time Computing
122. Calculation. Calculate (4);
126. // Send a message to handler
128. Handler. sendemptymessage (0);
130. }. Start ();
132. }
134. });
136. }
140. }

Package COM. lveyo. android. demo. progressbar; import android. app. activity; import android. app. progressdialog; import android. OS. bundle; import android. OS. handler; import android. OS. message; import android. view. view; import android. widget. button; import android. widget. textview; public class progressbardemo extends activity {private textview statustextview; private button beginbtn; private progressdialog progres Sdialog; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); statustextview = (textview) findviewbyid (R. id. status); beginbtn = (button) findviewbyid (R. id. beginbtn); setlistener ();}/*** use handler to update UI */private handler = new handler () {@ overridepublic void handlemessage (Message MSG) {// disable progressdialogprogressdialog. Dismiss (); // update uistatustextview. settext ("completed! ") ;}};/*** Click the button event listener */private void setlistener () {beginbtn. setonclicklistener (new view. onclicklistener () {@ overridepublic void onclick (view v) {// display progressdialogprogressdialog = progressdialog. show (progressbardemo. this, "loading... "," Please wait... ", true, false); // new thread () {@ overridepublic void run () {// The calculation method that takes time to calculate. calculate (4); // send a message to handler. sendemptymessage (0 );}}. start ();}});}}