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：