安卓单选按钮值获取的两种方法

package com.cnhct.hechen.activity;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;

import com.cnhct.hechen.R;
import com.cnhct.hechen.utils.ToastUtil;

import java.util.ArrayList;
import java.util.List;

public class person_regist03_activity extends AppCompatActivity {

private Button bt_next3;
    private Button bt_back3;
    private Spinner sp_diploma;
    private List<String> list;
    private ArrayAdapter<String> sp_adapter;
    private RadioGroup rg_sex;
    private RadioButton female;
    private RadioButton male;
    String sex="男";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_person_regist03_activity);
        //获取下拉框控件
        sp_diploma = (Spinner) findViewById(R.id.sp_diploma);
        //下拉框数据
        list = new ArrayList<String>();

        //下拉框适配器list.add("初中及以下");
        list.add("高中");
        list.add("大专");
        list.add("本科");
        list.add("硕士及以上");
        sp_adapter = new ArrayAdapter<String>(person_regist03_activity.this,
                                              android.R.layout.simple_spinner_item,
                                              list);
        sp_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        //设置适配器
        sp_diploma.setAdapter(sp_adapter);
        bt_next3 = (Button) findViewById(R.id.bt_next3);
        bt_next3.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
//获得单选按钮和选择组
                rg_sex = (RadioGroup) findViewById(R.id.rg_sex);
                female = (RadioButton) findViewById(R.id.female);
                male = (RadioButton) findViewById(R.id.male);
//按钮组件设置事件，获得选择的单选按钮内容
//                rg_sex.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
//                    @Override
//                    public void onCheckedChanged(RadioGroup group, int checkedId) {
//                        if(checkedId==person_regist03_activity.this.female.getId()){
//                            sex=female.getText().toString();
//                            ToastUtil.ToastDemo(person_regist03_activity.this,sex);
//                        }else {
//                            sex=male.getText().toString();
//                            ToastUtil.ToastDemo(person_regist03_activity.this,sex);
//                        }
//                    }
//                });
                  for (int i = 0;i<rg_sex.getChildCount();i++){
                      RadioButton radioButton = (RadioButton)rg_sex.getChildAt(i);
                      if(radioButton.isChecked()){
sex=radioButton.getText().toString();
                      }
                  }
                    Intent intent = new Intent(person_regist03_activity.this,person_regist04_activity.class);
                    startActivity(intent);
                    ToastUtil.ToastDemo(person_regist03_activity.this,sex);

            }
        });
        //获取上一步按钮，设置点击事件
        bt_back3 = (Button) findViewById(R.id.back3);
        bt_back3.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
                Intent intent = new Intent(person_regist03_activity.this,person_regist02_activity.class);
                startActivity(intent);
            }
        });
    }

}