Android Hundred Day Program: Progress bar dialog box implementation

Displays the dialog managed by the activity.

This kind of dialog has a variety of, which is more common is loading time, the display of a loading progress bar.

Android displays such a progress bar is still very convenient, because there are ready-made modules can be called.

First look at the effect of this program:

1 Main interface:

2 Click this button to display:

Progress bar to 100 will automatically shut down, of course, here is the simulation download, the real download algorithm needs to continue to improve, but also very simple algorithm, not a difficult point.

Clicking the Cancel or OK button also invokes the function, making the desired action, which shows a toast (simple short-lived dialog) prompt. No.

Steps:

After you create a new project, use the following code to make the main interface:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    android:o rientation= "vertical" >    <button        android:id= "@+id/dialog_button" android:layout_width= "Wrap_        Content "        android:layout_height=" wrap_content "        android:layout_gravity=" center "        android:onclick=" OnClick "        android:text=" @string/dialog_button "/>  </LinearLayout>

Then the logic code:

Package Su.dialog.dialog;import Android.app.activity;import Android.app.dialog;import android.app.ProgressDialog; Import Android.content.dialoginterface;import Android.os.bundle;import Android.view.view;import Android.widget.toast;public class Mainactivity extends Activity {progressdialog progressdialog; @Overridepublic void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main);} public void OnClick (View v) {showDialog (1);p rogressdialog.setprogress (0), New Thread (new Runnable () {public void run () {  for (int i = 1; i <=; i++) {try {thread.sleep (+);p Rogressdialog.incrementprogressby ((int) (100.F/15.F));} catch (Interruptedexception e) {E.printstacktrace ();}} Progressdialog.dismiss ();}}). Start ();} @Overrideprotected Dialog oncreatedialog (int id) {ProgressDialog = new ProgressDialog (this);p Rogressdialog.seticon ( R.drawable.ic_launcher);p rogressdialog.settitle ("Downloading files ...");p Rogressdialog.setprogressstyle ( Progressdialog.sTyle_horizontal);p Rogressdialog.setbutton (dialoginterface.button_positive, "OK", new Dialoginterface.onclicklistener () {public void OnClick (dialoginterface dialog, int whichbutton) {Toast.maketext ( Getbasecontext (), "OK clicked!", Toast.length_short). Show ();}); Progressdialog.setbutton (Dialoginterface.button_negative, "Cancel", new Dialoginterface.onclicklistener () {public void OnClick (dialoginterface dialog, int whichbutton) {Toast.maketext (Getbasecontext (), "Cancel clicked!", Toast.length_short). Show ();}}); return progressdialog;}}

The ShowDialog () function is already a function of deprecated and can be referenced by: http://stackoverflow.com/questions/10285047/ Showdialog-deprecated-whats-the-alternative

Knowledge Points:

1 Click event is declared in XML, that is: Android:onclick = "onclick", the following "onclick" is a function of its own definition, can be any name, as long as the name of the XML and logic code in the same name can drive the click event.

2 Module ProgressDialog class is a bit complex, in fact, some of the properties of the settings and function calls, it is not difficult to understand, look at the code carefully.

Android Hundred Day Program: Progress bar dialog box implementation