用纯代码实现RadioGroup，并且实现滚动条

一.代码如下：

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.ScrollView;
import android.widget.TextView;

/**
 * 用纯代码实现RadioGroup，并且实现滚动条
 * */
public class QuestionActivity extends Activity {
 /**
  * 性别问题标题
  * */
 private TextView mSexQuestionTv;
 /**
  * 冠军问题标题
  * */
 private TextView mChampionQuestionTv;
 /**
  * 城市名称问题标题
  * */
 private TextView mCityQuestionTv;
 /**
  * 城市名称问题答案
  * */
 private TextView mCitySolutionTv;
 
 /**
  * 性别问题选项组
  * */
 private RadioGroup mSexQuestionRG;
 /**
  * 冠军问题选项组
  * */
 private RadioGroup mChampionQuestionRG;
 /**
  * 城市名称选项组
  * */
 private RadioGroup mCityQuestionRG;
 
 /**
  * 帅哥
  * */
 private RadioButton mHandsomeBoyRd;
 /**
  * 美女
  * */
 private RadioButton mBelleRd;
 /**
  * 西班牙
  * */
 private RadioButton mSpainRd;
 /**
  * 荷兰
  * */
 private RadioButton mHollandRd;
 /**
  * 德国
  * */
 private RadioButton mGermanyRd;
 /**
  * 北京
  * */
 private RadioButton mBeijingCityRd;
 /**
  * 上海
  * */
 private RadioButton mShangHaiCityRd;
 /**
  * 广州
  * */
 private RadioButton mGuangZhouRd;
 /**
  * 深圳
  * */
 private RadioButton mShenZhenCityRd;
 private ScrollView mScrollView;
 
 /**
  * 问题根部局
  * */
 private LinearLayout mRootLl;
 /**
  * RadioGroup布局参数
  * */
 RadioGroup.LayoutParams mRadioParams;
 /**
  * 线性布局参数
  * */
 LinearLayout.LayoutParams mLinearParams;
 /**
  * 设置布局的宽高
  * */
 private final int mWidth = LinearLayout.LayoutParams.FILL_PARENT;
 /**
  * 设置布局的宽高
  * */
 private final int mHeight = LinearLayout.LayoutParams.FILL_PARENT;

 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 
  mScrollView = new ScrollView(this);
  /**
   * 设置滚屏布局的宽高布局
   * */
  mScrollView.setLayoutParams(new LayoutParams(mWidth, mHeight));

  mRootLl = new LinearLayout(this);
  // mRootLl.setBackgroundResource(R.drawable.back);
  mRootLl.setBackgroundColor(Color.BLACK);
  /**
   * 设置Root线性布局的宽高
   * */
  mRootLl.setLayoutParams(new LayoutParams(mWidth, mHeight));
  mRootLl.setOrientation(LinearLayout.VERTICAL);
  mLinearParams = new LinearLayout.LayoutParams(mWidth, mHeight);
  mScrollView.addView(mRootLl);

  mSexQuestionTv = new TextView(this);
  mSexQuestionTv.setText("请问你是");
  mRootLl.addView(mSexQuestionTv, mLinearParams);
  mSexQuestionRG = new RadioGroup(this);
  mSexQuestionRG.setOrientation(RadioGroup.VERTICAL);
  // mParams = new RadioGroup.LayoutParams(137,216);
  mLinearParams = new LinearLayout.LayoutParams(mWidth, mHeight);
  mRootLl.addView(mSexQuestionRG, mLinearParams);
  
  mHandsomeBoyRd = new RadioButton(this);
  mHandsomeBoyRd.setText("帅哥");
  /**
   * 设置ID
   * */
  mHandsomeBoyRd.setId(1001);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mSexQuestionRG.addView(mHandsomeBoyRd, mRadioParams);
  mBelleRd = new RadioButton(this);
  mBelleRd.setText("美女");
  /**
   * 设置ID
   * */
  mBelleRd.setId(1002);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mSexQuestionRG.addView(mBelleRd, mRadioParams);

  mChampionQuestionTv = new TextView(this);
  mChampionQuestionTv.setText("2010南非世界杯季军是");
  mRootLl.addView(mChampionQuestionTv, mLinearParams);
  
  mChampionQuestionRG = new RadioGroup(this);
  mChampionQuestionRG.setOrientation(RadioGroup.VERTICAL);
  // mParams = new RadioGroup.LayoutParams(137,216);
  mLinearParams = new LinearLayout.LayoutParams(mWidth, mHeight);
  mRootLl.addView(mChampionQuestionRG, mLinearParams);
  
  mSpainRd = new RadioButton(this);
  mSpainRd.setText("西班牙");
  /**
   * 设置ID
   * */
  mSpainRd.setId(1003);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mChampionQuestionRG.addView(mSpainRd, mRadioParams);
  mHollandRd = new RadioButton(this);
  mHollandRd.setText("荷兰");
  /**
   * 设置ID
   * */
  mHollandRd.setId(1004);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mChampionQuestionRG.addView(mHollandRd, mRadioParams);
  mGermanyRd = new RadioButton(this);
  mGermanyRd.setText("德国");
  /**
   * 设置ID
   * */
  mGermanyRd.setId(1005);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mChampionQuestionRG.addView(mGermanyRd, mRadioParams);

  mCityQuestionTv = new TextView(this);
  mCityQuestionTv.setText("2010亚运会在哪个城市举行: ");
  mRootLl.addView(mCityQuestionTv, mLinearParams);
  
  mCityQuestionRG = new RadioGroup(this);
  mCityQuestionRG.setOrientation(RadioGroup.VERTICAL);
  // mParams = new RadioGroup.LayoutParams(137,216);
  mLinearParams = new LinearLayout.LayoutParams(mWidth, mHeight);
  mRootLl.addView(mCityQuestionRG, mLinearParams);
  
  mBeijingCityRd = new RadioButton(this);
  mBeijingCityRd.setText("北京");
  /**
   * 设置ID
   * */
  mBeijingCityRd.setId(1006);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mCityQuestionRG.addView(mBeijingCityRd, mRadioParams);
  mShangHaiCityRd = new RadioButton(this);
  mShangHaiCityRd.setText("上海");
  /**
   * 设置ID
   * */
  mShangHaiCityRd.setId(1007);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mCityQuestionRG.addView(mShangHaiCityRd, mRadioParams);
  mGuangZhouRd = new RadioButton(this);
  mGuangZhouRd.setText("广州");
  /**
   * 设置ID
   * */
  mGuangZhouRd.setId(1008);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mCityQuestionRG.addView(mGuangZhouRd, mRadioParams);
  mShenZhenCityRd = new RadioButton(this);
  mShenZhenCityRd.setText("深圳");
  /**
   * 设置ID
   * */
  mShenZhenCityRd.setId(1009);
  mRadioParams = new RadioGroup.LayoutParams(mWidth, mHeight);
  mCityQuestionRG.addView(mShenZhenCityRd, mRadioParams);
  
  mCitySolutionTv = new TextView(this);
  mCitySolutionTv.setText("答案: ");
  mRootLl.addView(mCitySolutionTv, mLinearParams);
  
  /**
   * 设置当前的布局
   * */
  setContentView(mScrollView);

  mSexQuestionRG.setOnCheckedChangeListener(mRadioChangeListener);
  mChampionQuestionRG.setOnCheckedChangeListener(mRadioChangeListener);
  mCityQuestionRG.setOnCheckedChangeListener(mRadioChangeListener);
 }

 /**
  * 选项选择改变的事件
  * */
 private RadioGroup.OnCheckedChangeListener mRadioChangeListener = new RadioGroup.OnCheckedChangeListener() {
  public void onCheckedChanged(RadioGroup group, int checkedId) {
   if (checkedId == mHandsomeBoyRd.getId()) {
    mSexQuestionTv.setText(mBelleRd.getText());
   } else if (checkedId == mBelleRd.getId()) {
    mSexQuestionTv.setText(mBelleRd.getText());
   } else if (checkedId == mSpainRd.getId()) {
    mChampionQuestionTv.setText(mSpainRd.getText());
   } else if (checkedId == mHollandRd.getId()) {
    mChampionQuestionTv.setText(mHollandRd.getText());
   } else if (checkedId == mGermanyRd.getId()) {
    mChampionQuestionTv.setText(mGermanyRd.getText());
   } else if (checkedId == mBeijingCityRd.getId()) {
    mCitySolutionTv.setText("答案: " + mBeijingCityRd.getText());
   } else if (checkedId == mShangHaiCityRd.getId()) {
    mCitySolutionTv.setText("答案: " + mShangHaiCityRd.getText());
   } else if (checkedId == mGuangZhouRd.getId()) {
    mCitySolutionTv.setText("答案: " + mGuangZhouRd.getText());
   } else if (checkedId == mShenZhenCityRd.getId()) {
    mCitySolutionTv.setText("答案: " + mShenZhenCityRd.getText());
   }
  }
 };
}

 

二.实际效果图：