ProgressDialog uses a summary

Article source: blog.csdn.net/caesardadi/…

The use of the ProgressDialog

ProgressDialog inherits from AlertDialog, and AlertDialog inherits from Dialog and implements DialogInterface.

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ProgressDialog is created either as a new Dialog or by calling Dialog’s static method dialog.show ().

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1. // New Dialog
2.     final ProgressDialog dialog = new ProgressDialog(this);  
3.     dialog.show();  

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1. // Mode 2: use static mode to create and display the progress bar, which can only be a circular bar, set the title and Message prompt content
2. ProgressDialog dialog2 = progressdialog. show(this, “”,” “);

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1. // The progress bar can only be a circular bar. Boolean indeterminate is set to an undefined state
2.     ProgressDialog dialog3 = ProgressDialog  
3. .show(this, “prompt “,” logging in “, false);

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1. The last Boolean cancelable parameter sets whether the progress bar can be cancelled
2. ProgressDialog dialog4 = progressdialog. show(this, “新 “,” 新 “,
3.             false, true);  

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1. / / way five using static methods to create and display, this article progress bar can be round, here the last parameter DialogInterface. OnCancelListener
2. CancelListener Is used to listen for the progress bar to be cancelled
3. ProgressDialog dialog5 = progressdialog. show(this, “新 “,” 新 “, true,
4.             true, cancelListener);  

Method 5 requires a cancelListener with the following code; \

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1. private OnCancelListener cancelListener = new OnCancelListener() {  
2.   
3.     @Override  
4.     public void onCancel(DialogInterface dialog) {  
5.         // TODO Auto-generated method stub  
6. Toast.maketext (mainactivity. this, “Progress bar cancelled “, toast.length_long)
7.                 .show();  
8.   
9.     }  
10. };  

The ProgressDialog has two styles, a circular undefined state and a horizontal progress bar state

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The first way: circular progress bar

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1. final ProgressDialog dialog = new ProgressDialog(this);  
2. dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); // Set the progress bar to a circular progress bar
3. dialog.setCancelable(true); // Set whether you can cancel by clicking the Back key
4. dialog.setCanceledOnTouchOutside(false); // Sets whether to cancel the Dialog progress bar after clicking Dialog
5. dialog.setIcon(R.drawable.ic_launcher); //
6. // Set the Icon of the prompt title, default is not set, if the title is not set only Icon will not display the Icon
7. Dialog. SetTitle (” tip “);
8. / / dismiss listening in
9.         dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {  
10.   
11.             @Override  
12.             public void onDismiss(DialogInterface dialog) {  
13.                 // TODO Auto-generated method stub  
14.   
15.             }  
16.         });  
17. // The listener Key event is passed to the dialog
18.         dialog.setOnKeyListener(new DialogInterface.OnKeyListener() {  
19.   
20.             @Override  
21.             public boolean onKey(DialogInterface dialog, int keyCode,  
22.                     KeyEvent event) {  
23.                 // TODO Auto-generated method stub  
24.                 return false;  
25.             }  
26.         });  
27. // Listen for the Cancel event
28.         dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {  
29.   
30.             @Override  
31.             public void onCancel(DialogInterface dialog) {  
32.                 // TODO Auto-generated method stub  
33.   
34.             }  
35.         });  
36. // Set clickable buttons, up to three (default)
37. Dialog. setButton(DialogInterface.BUTTON_POSITIVE, “confirm “,
38.                 new DialogInterface.OnClickListener() {  
39.   
40.                     @Override  
41.                     public void onClick(DialogInterface dialog, int which) {  
42.                         // TODO Auto-generated method stub  
43.   
44.                     }  
45.                 });  
46. Dialog. setButton(DialogInterface.BUTTON_NEGATIVE, “Cancel “,
47.                 new DialogInterface.OnClickListener() {  
48.   
49.                     @Override  
50.                     public void onClick(DialogInterface dialog, int which) {  
51.                         // TODO Auto-generated method stub  
52.   
53.                     }  
54.                 });  
55. Dialog. setButton(DialogInterface.BUTTON_NEUTRAL,
56.                 new DialogInterface.OnClickListener() {  
57.   
58.                     @Override  
59.                     public void onClick(DialogInterface dialog, int which) {  
60.                         // TODO Auto-generated method stub  
61.   
62.                     }  
63.                 });  
64. Dialog.setmessage (” This is a circular progress bar “);
65.         dialog.show();  
66.         new Thread(new Runnable() {  
67.   
68.             @Override  
69.             public void run() {  
70.                 // TODO Auto-generated method stub  
71.                 try {  
72.                     Thread.sleep(5000);  
73. The cancel and dismiss methods are essentially the same, removing the Dialog from the screen, with the only difference
74. / / call the cancel method callback DialogInterface. OnCancelListener if register, dismiss method doesn’t back off
75.                     dialog.cancel();  
76.                     // dialog.dismiss();  
77.                 } catch (InterruptedException e) {  
78.                     // TODO Auto-generated catch block  
79.                     e.printStackTrace();  
80.                 }  
81.   
82.             }  
83.         }).start();  

Thread. Sleep (5000) is used to simulate the background operation.

Cancel and dismiss the essence is the same, both are removed from the screen Dialog, the only difference is: call the cancel method will callback DialogInterface. OnCancelListener if register, dismiss method doesn’t back off. \

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Second way: horizontal progress bar

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1. // The progress bar has the form of a secondary progress bar, which is not demonstrated here
2.     final ProgressDialog dialog = new ProgressDialog(this);  
3. dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); // Set the horizontal progress bar
4. dialog.setCancelable(true); // Set whether you can cancel by clicking the Back key
5. dialog.setCanceledOnTouchOutside(false); // Sets whether to cancel the Dialog progress bar after clicking Dialog
6. dialog.setIcon(R.drawable.ic_launcher); // Set the icon for the prompt title, which is not available by default
7. Dialog. SetTitle (” tip “);
8.     dialog.setMax(100);  
9. Dialog. setButton(DialogInterface.BUTTON_POSITIVE, “confirm “,
10.             new DialogInterface.OnClickListener() {  
11.   
12.                 @Override  
13.                 public void onClick(DialogInterface dialog, int which) {  
14.                     // TODO Auto-generated method stub  
15.   
16.                 }  
17.             });  
18. Dialog. setButton(DialogInterface.BUTTON_NEGATIVE, “Cancel “,
19.             new DialogInterface.OnClickListener() {  
20.   
21.                 @Override  
22.                 public void onClick(DialogInterface dialog, int which) {  
23.                     // TODO Auto-generated method stub  
24.   
25.                 }  
26.             });  
27. Dialog. setButton(DialogInterface.BUTTON_NEUTRAL,
28.             new DialogInterface.OnClickListener() {  
29.   
30.                 @Override  
31.                 public void onClick(DialogInterface dialog, int which) {  
32.                     // TODO Auto-generated method stub  
33.   
34.                 }  
35.             });  
36. Dialog.setmessage (” This is a horizontal progress bar “);
37.     dialog.show();  
38.     new Thread(new Runnable() {  
39.   
40.         @Override  
41.         public void run() {  
42.             // TODO Auto-generated method stub  
43.             int i = 0;  
44.             while (i < 100) {  
45.                 try {  
46.                     Thread.sleep(200);  
47. // Update the progress bar progress. You can update the progress bar progress in child threads
48.                     dialog.incrementProgressBy(1);  
49. / / / / dialog. IncrementSecondaryProgressBy (10) secondary progress bar update way
50.                     i++;  
51.   
52.                 } catch (Exception e) {  
53.                     // TODO: handle exception  
54.                 }  
55.             }  
56. // Delete Dialog when the progress bar runs out
57.             dialog.dismiss();  
58.   
59.         }  
60.     }).start();  

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More of a custom ProgressDialog is used to meet the needs of different displays.

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