Android Click a button to pop up a dialog box

The interface is very simple, is a button, click on this button, will pop up a dialog box

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"     xmlns:tools= "http// Schemas.android.com/tools "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    android:orientation=" vertical "    tools:context=". Mainactivity ">    <Button        android:onclick=" Onclick1 "      & nbsp Android:layout_width= "Wrap_content"         android:layout_height= "wrap_content"         android:text= "@string/bt_1"  />   <Button        Android:o nclick= "Onclick2"         android:layout_width= "wrap_content"         Android: layout_height= "Wrap_content"         android:text= "@string/bt_2"  />   < button        android:onclick= "Onclick3"         android:layout_width= "wrap_content "        android:layout_height=" wrap_content "        android:text=" @ String/bt_3 " />   </LinearLayout>

Next is the Main method

</pre><pre name= "code" class= "java" >package com.neusoft.dialog;import Junit.framework.assert;import Android.net.wifi.wifimanager.multicastlock;import Android.os.bundle;import Android.app.activity;import Android.app.alertdialog;import Android.app.alertdialog.builder;import Android.content.dialoginterface;import Android.content.dialoginterface.onclicklistener;import Android.content.dialoginterface.onmultichoiceclicklistener;import Android.view.menu;import Android.view.menuitem.onmenuitemclicklistener;import Android.view.view;import Android.widget.abslistview.multichoicemodelistener;import Android.widget.toast;public class MainActivity extends Activity {@Overrideprotected void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main);} public void Onclick1 (view view)//This method pops up a dialog box {alertdialog.builder builder=new Builder (this); Builder.seticon ( R.drawable.ic_launcher)///Set icon Builder.settitle ("If you want to succeed must be self-palace");//Set the title of the dialog builder.setmesSage ("Are you sure you want to go from the palace?" Builder.setpositivebutton ("OK", new Onclicklistener () {//This is the set OK button @overridepublic void OnClick ( Dialoginterface arg0, int arg1) {toast.maketext (Mainactivity.this, "self-palace Success", Toast.length_short). Show ();}); Builder.setnegativebutton ("Cancel", new Onclicklistener () {//Cancel button @overridepublic void OnClick (dialoginterface arg0, int ARG1) {Toast.maketext (Mainactivity.this, "cancellation from Palace", Toast.length_short). Show ();});  Alertdialog b=builder.create ();  B.show (); You must show it to see the dialog box, like toast}public void Onclick2 (view view)//Here is a single-selection dialog box {Alertdialog.builder builder=new Builder (this); Builder.seticon (Android. R.drawable.ic_dialog_info) Builder.settitle ("Please select Gender"), Final String []items=new string[]{"male", "female"}; Builder.setsinglechoiceitems (items,-1, New Onclicklistener () {//which refers to the subscript//dialog of the entry selected by the User: The dialog box triggering this method @overridepublic void OnClick (dialoginterface dialog, int which) {Toast.maketext (Mainactivity.this, "you selected:" +items[which], Toast.length_short). Show ();d Ialog.dismiss (); When a user selects a value, the dialog box}); Builder.show ();//This is also a show dialog box, the above can also}public void Onclick3 (view view)//This is a multi-select dialog box {Alertdialog.builder Builder=new Builder (mainactivity.this); Builder.seticon (Android. R.drawable.ic_dialog_info); Builder.settitle ("Please select the person you think is handsome"); final String []itemsid=new string[]{"Xiao Ming", "Xiao Zhi", "Little Dragon", "Xiao Zhao"} ; Final Boolean []checkeditems=new boolean[]{true,true,false,false};// Here's true is the default number of people who have been selected Builder.setmultichoiceitems (Itemsid, Checkeditems,new Onmultichoiceclicklistener () {@ overridepublic void OnClick (dialoginterface dialog, int which, Boolean ischeck) {Checkeditems[which]=ischeck;}}); /Set a OK button Builder.setpositivebutton ("OK", new Onclicklistener () {@Overridepublic void OnClick (Dialoginterface dialog, int whick) {String text= ""; for (int i=0;i<itemsid.length;i++) {text+=checkeditems[i]?itemsid[i]+ ",": "";} Toast.maketext (mainactivity.this, Text, Toast.length_short). Show ();d Ialog.dismiss ();}); Builder.show ();}}

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Android Click a button to pop up a dialog box