单选按钮RadioGroup、复选框CheckBox都有OnCheckedChangeListener事件，我们一起了解一下。
1 package com.genwoxue.oncheckedchanged; 2 3 import android.os.Bundle; 4 import android.app.Activity; 5 import android.widget.RadioGroup; 6 import android.widget.RadioButton; 7 import android.widget.RadioGroup.OnCheckedChangeListener; //引入OnCheckedChangeListener事件相关包 8 import android.widget.CheckBox; 9 import android.widget.CompoundButton; 10 import android.widget.Toast; 11 12 13 public class MainActivity extends Activity { 14 private RadioGroup GenderGroup=null; 15 private RadioButton rbMale=null; 16 private RadioButton rbFemale=null; 17 private CheckBox cbFootBall=null; 18 private CheckBox cbBasketBall=null; 19 20 @Override 21 protected void onCreate(Bundle savedInstanceState) { 22 super.onCreate(savedInstanceState); 23 setContentView(R.layout.activity_main); 24 25 GenderGroup=(RadioGroup)super.findViewById(R.id.gender); 26 rbMale=(RadioButton)super.findViewById(R.id.male); 27 rbFemale=(RadioButton)super.findViewById(R.id.female); 28 cbFootBall=(CheckBox)super.findViewById(R.id.football); 29 cbBasketBall=(CheckBox)super.findViewById(R.id.basketball); 30 //在GenderGroup注册OnCheckedChangeListener事件 31 GenderGroup.setOnCheckedChangeListener(new GenderOnCheckedChangeListener()); 32 //在cbFootBall注册OnCheckedChangeListener事件 33 cbFootBall.setOnCheckedChangeListener(new BootBallOnCheckedChangeListener()); 34 //在cbBasketBall注册OnCheckedChangeListener事件 35 36 cbBasketBall.setOnCheckedChangeListener(new BasketBallOnCheckedChangeListener()); 37 } 38 39 private class GenderOnCheckedChangeListener implements OnCheckedChangeListener{ 40 @Override 41 public void onCheckedChanged(RadioGroup group,int checkedId){ 42 String sGender=""; 43 if(rbFemale.getId()==checkedId){ 44 sGender=rbFemale.getText().toString(); 45 } 46 if(rbMale.getId()==checkedId){ 47 sGender=rbMale.getText().toString(); 48 } 49 Toast.makeText(getApplicationContext(), "您选择的性别是："+sGender, Toast.LENGTH_LONG).show(); 50 } 51 52 } 53 54 private class BootBallOnCheckedChangeListener implements CompoundButton.OnCheckedChangeListener{ 55 @Override 56 public void onCheckedChanged(CompoundButton button, boolean isChecked){ 57 String sFav=""; 58 if(isChecked){ 59 sFav=cbFootBall.getText().toString(); 60 sFav=sFav+"选中！"; 61 } 62 else 63 sFav=sFav+"未迁中"; 64 Toast.makeText(getApplicationContext(), "您选择的爱好是："+sFav, Toast.LENGTH_LONG).show(); 65 } 66 } 67 68 private class BasketBallOnCheckedChangeListener implements CompoundButton.OnCheckedChangeListener{ 69 @Override 70 public void onCheckedChanged(CompoundButton button,boolean isChecked){ 71 String sFav=""; 72 if(cbBasketBall.isChecked()){ 73 sFav=cbBasketBall.getText().toString(); 74 sFav=sFav+"选中！"; 75 } 76 else 77 sFav=sFav+"未迁中"; 78 Toast.makeText(getApplicationContext(), "您选择的爱好是："+sFav, Toast.LENGTH_LONG).show(); 79 } 80 } 81 82 }
管单选按钮和复选框都有OnCheckedChange事件，但注意二者区别。
效果如下：
