设置一个变量值，选择收音机组中的单选按钮

当用户从收音机组中选择男性，女性或未分类时，我想将字符串变量值设置为1,2,3。设置一个变量值，选择收音机组中的单选按钮

现在我做这种方式，但即使我选择一个单选按钮，将其设置变量值null

代码：

RadioGroup genderGroup; 
RadioButton male, female, unclassified; 
String strGender; 
genderGroup = findViewById(R.id.genderGroup); 
male = findViewById(R.id.genderMale); 
female = findViewById(R.id.genderFemale); 
unclassified = findViewById(R.id.genderUnclassified); 

if (genderGroup.getCheckedRadioButtonId() == -1) { 
     strGender = null;   //no buttons selected 
    } else { 
     if (male.isChecked()) {  //>genderGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { 
    @Override 
    public void>
                                
                            

                            

                                    
    KhanStan99
                                    
                            
                            

                            

                    



                
            
        

        
            
            
回答
        

        

        
            
                
                    
            
            
                
                
你需要使用RadioGroup.OnCheckedChangeListener
 
 
 
接口定义为回调时，检查单选按钮该组中的改变被调用。
 
 
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { 
    @Override 
    public void>
                                
                        

                        

                                
                        
                        

                        

                

    
    
        
            
                
                
                    
真棒！现在工作..谢谢@Nilesh –
                        
                                
                            
                        
                    
                
            
        
        
            
                
                
                    
谢谢@ KhanStan99高兴地帮助你 –
                        
                            
                        
                    
                
            
        
    
            
        

        
        
        

        
            
                
            
            
                
                
genderGroup.setOnCheckedChangeListener(new>
                                
                        

                        

                                
                        
                        

                        

                

            
        
        
            
                
            
            
                
                
你应该处理这个如下图所示：
 
// Is the button now checked? 
boolean checked = ((RadioButton) view).isChecked(); 

// Check which radio button was clicked 
switch(view.getId()) { 
    case R.id.genderMale: 
     if (checked) 
      strGender = 1; 
     break; 
    case R.id.genderFemale: 
     if (checked) 
      strGender = 2; 
     break; 
    case R.id.genderUnclassified: 
     if (checked) 
      strGender = 3; 
     break; 
} 

                
                
                    
                        

                                
                        
                        

                                
                        
                        

                        

                

            
        
        
            
                
            
            
                
                
public class MainActivity extends Activity { 
    RadioGroup genderGroup; 
    @Override 
    protected void>
                                
                        
设置一个变量值，选择收音机组中的单选按钮