Android implementation of single, multiple choice operation _android

The example of this article for everyone to share the Android implementation of a single, multiple options for the operation of the code, for your reference, the specific contents are as follows

1. Single Choice
1.1. Layout

<?xml version= "1.0" encoding= "Utf-8"?> <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= "com.rj141.sb.kongjian.DateActivity" > <textvi EW android:layout_marginleft= "10DP" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" a ndroid:text= "2+3=" android:textsize= "22DP"/> <radiogroup android:layout_marginleft= "20DP" android:l Ayout_width= "Wrap_content" android:layout_height= "wrap_content" > <radiobutton android:layout_width= "Wrap_c" Ontent "android:layout_height=" wrap_content "android:text=" A.2 "android:id=" @+id/rb1 "/> <RadioBu Tton android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "B.3" android:i d= "@+id/rb2"/> <radioButton android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "C.4" Android : id= "@+id/rb3"/> <radiobutton android:layout_width= "Wrap_content" android:layout_height= T "android:text=" D.5 "android:id=" @+id/rb4 "/> </RadioGroup> <button android:id=" @+id/sub MIT "android:layout_width=" Match_parent "android:layout_height=" Wrap_content "android:text=" Submit "/> </Linear Layout>

1.2.Java file

public class Singchoose extends Appcompatactivity { 
 private Button btn; 
 Private RadioButton RbD; 
 @Override 
 protected void onCreate (Bundle savedinstancestate) { 
  super.oncreate (savedinstancestate); 
  Setcontentview (r.layout.sing_choose); 
 
  Rbd= (RadioButton) This.findviewbyid (R.ID.RB4); 
  Btn= (Button) This.findviewbyid (r.id.submit); 
  Btn.setonclicklistener (New View.onclicklistener () { 
   @Override public 
   void OnClick (View v) { 
    if ( Rbd.ischecked ()) { 
     Toast.maketext (singchoose.this, "correct, please add five Points", Toast.length_short). Show (); 
    else { 
     Toast.maketext (singchoose.this, "error, please subtract five Points", Toast.length_short). Show ();}}} 
  

Effect Chart:

2. Multi-item selection
2.1. Layout

<?xml version= "1.0" encoding= "Utf-8"?> <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= "com.rj141.sb.kongjian.CheckChoose" > <textview Android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:textsize= "20DP" Android:text = "Which of the following items do you like?" "/> <checkbox android:layout_width=" wrap_content "android:layout_height=" Wrap_content "Android:text" = "Chocolate" android:id= "@+id/cb1"/> <checkbox android:layout_width= "wrap_content" android:layout_height= "WR" 
  Ap_content "android:text=" Ice cream android:id= "@+id/cb2"/> <checkbox android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "Cake" android:id= "@+id/cb3"/> <checkbox Out_width= "Wrap_content" 
  android:layout_height= "wrap_content" android:text= "Beer" android:id= "@+id/cb4"/> <checkbox, Android:l 
 
 Ayout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "Meat" android:id= "@+id/cb5"/> 
  <textview android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:textSize= "18DP" 
 Android:id= "@+id/tv"/> </LinearLayout>

2.2.Java file

public class Checkchoose extends Appcompatactivity implements Compoundbutton.oncheckedchangelistener {private checkb 
 Ox cb1,cb2,cb3,cb4,cb5; 
 Private TextView TV; 
  @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
 
  Setcontentview (R.layout.check_choose); 
  tv= (TextView) This.findviewbyid (r.id.tv); 
  cb1= (CheckBox) This.findviewbyid (R.ID.CB1); 
  Cb2= (CheckBox) This.findviewbyid (R.ID.CB2); 
  cb3= (CheckBox) This.findviewbyid (R.ID.CB3); 
  cb4= (CheckBox) This.findviewbyid (R.ID.CB4); 
  cb5= (CheckBox) This.findviewbyid (R.ID.CB5); 
  Cb1.setoncheckedchangelistener (this); 
  Cb2.setoncheckedchangelistener (this); 
  Cb3.setoncheckedchangelistener (this); 
  Cb4.setoncheckedchangelistener (this); 
 Cb5.setoncheckedchangelistener (this); 
  @Override public void OnCheckedChanged (Compoundbutton buttonview, Boolean ischecked) {String str= "you like:"; 
  if (cb1.ischecked ()) {Str+=cb1.gettext () + ","; } if (Cb2.ischEcked ()) {Str+=cb2.gettext () + ","; 
  } if (cb3.ischecked ()) {Str+=cb3.gettext () + ","; 
  } if (cb4.ischecked ()) {Str+=cb4.gettext () + ","; 
  } if (cb5.ischecked ()) {Str+=cb5.gettext () + ","; 
 } tv.settext (str);  } 
}

Effect Chart:

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