Android Program Development: (1) detailed activity-1.6 display complex dialog box

In addition to the "dialog box" progress bar, you can also create a dialog box that displays the "Operation progress", for example, displaying the download status.

1. Create a project: dialog.

2. Code in Main. xml.

[Java]View plaincopy

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
3. Android: layout_width = "fill_parent"
4. Android: layout_height = "fill_parent"
5. Android: Orientation = "vertical">
7. <Button
8. Android: Id = "@ + ID/btn_dialog3"
9. Android: layout_width = "fill_parent"
10. Android: layout_height = "wrap_content"
11. Android: onclick = "onclick3"
12. Android: text = "click to display a detailed progress dialog"/>
14. </Linearlayout>

3. Code in dialogactivity. java.[Java]View plaincopy

1. Public class dialogactivity extends activity {
2. Progressdialog;
4. /** Called when the activity is first created .*/
5. @ Override
6. Public void oncreate (bundle savedinstancestate ){
7. Super. oncreate (savedinstancestate );
8. Setcontentview (R. layout. Main );
9. }
11. Public void onclick3 (view v ){
12. Showdialog (1 );
13. Progressdialog. setprogress (0 );
15. New thread (New runnable (){
16. Public void run (){
17. For (INT I = 1; I <= 15; I ++ ){
18. Try {
19. // --- Simulate doing something lengthy ---
20. Thread. Sleep (1000 );
21. // --- Update the dialog ---
22. Progressdialog. incrementprogressby (INT) (100/15 ));
23. } Catch (interruptedexception e ){
24. E. printstacktrace ();
25. }
26. }
27. Progressdialog. Dismiss ();
28. }
29. }). Start ();
30. }
32. @ Override
33. Protected dialog oncreatedialog (int id ){
34. Switch (ID ){
35. Case 1:
36. Progressdialog = new progressdialog (this );
37. Progressdialog. seticon (R. drawable. ic_launcher );
38. Progressdialog. settitle ("downloading files ...");
39. Progressdialog. setprogressstyle (progressdialog. style_horizontal );
40. Progressdialog. setbutton (dialoginterface. button_positive, "OK ",
41. New dialoginterface. onclicklistener (){
42. Public void onclick (dialoginterface dialog,
43. Int whichbutton ){
44. Toast. maketext (getbasecontext (), "OK clicked! ",
45. Toast. length_short). Show ();
46. }
47. });
48. Progressdialog. setbutton (dialoginterface. button_negative, "cancel ",
49. New dialoginterface. onclicklistener (){
50. Public void onclick (dialoginterface dialog,
51. Int whichbutton ){
52. Toast. maketext (getbasecontext (), "cancel clicked! ",
53. Toast. length_short). Show ();
54. }
55. });
56. Return progressdialog;
57. }
58. Return NULL;
59. }
60. }

4. debug by F11.

To create a dialog box that shows the progress, you must first create an instance of the progressdialog class, and then set various statuses, icons, titles, styles, and so on:

[Java]View plaincopy

1. Progressdialog = new progressdialog (this );
2. Progressdialog. seticon (R. drawable. ic_launcher );
3. Progressdialog. settitle ("downloading files ...");
4. Progressdialog. setprogressstyle (progressdialog. style_horizontal );

Then, set two buttons:[Java]View plaincopy

1. Progressdialog. setbutton (dialoginterface. button_positive, "OK ",
2. New dialoginterface. onclicklistener (){
3. Public void onclick (dialoginterface dialog,
4. Int whichbutton ){
5. Toast. maketext (getbasecontext (), "OK clicked! ",
6. Toast. length_short). Show ();
7. }
8. });
9. Progressdialog. setbutton (dialoginterface. button_negative, "cancel ",
10. New dialoginterface. onclicklistener (){
11. Public void onclick (dialoginterface dialog,
12. Int whichbutton ){
13. Toast. maketext (getbasecontext (), "cancel clicked! ",
14. Toast. length_short). Show ();
15. }
16. });

Use a thread to display the progress bar status:[Java]View plaincopy

1. Progressdialog. setprogress (0 );
3. New thread (New runnable (){
4. Public void run (){
5. For (INT I = 1; I <= 15; I ++ ){
6. Try {
7. // --- Simulate doing something lengthy ---
8. Thread. Sleep (1000 );
9. // --- Update the dialog ---
10. Progressdialog. incrementprogressby (INT) (100/15 ));
11. } Catch (interruptedexception e ){
12. E. printstacktrace ();
13. }
14. }
15. Progressdialog. Dismiss ();
16. }
17. }). Start ();

When the progress bar reaches 100%, it is removed.