09_RadioGroup

package com.example.uiconrrol;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends ListActivity{

    private ArrayAdapter<ListCellData> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        adapter = new ArrayAdapter<ListCellData>(this, android.R.layout.simple_list_item_1);
        setListAdapter(adapter);

        adapter.add(new ListCellData(this, "RadioGroup", new Intent(this, AtyUsingRadioGroup.class)));
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {

        ListCellData data = adapter.getItem(position);
        data.startActivity();

        super.onListItemClick(l, v, position, id);
    }

}

package com.example.uiconrrol;

import android.content.Context;
import android.content.Intent;

public class ListCellData {

    public ListCellData(Context context, String controlName, Intent relatedIntent){
        this.controlName = controlName;
        this.context = context;
        this.relatedIntent = relatedIntent;
    }

    private String controlName = "";

    public String getControlName() {
        return controlName;
    }

    private Context context = null;

    public Context getContext() {
        return context;
    }

    private Intent relatedIntent = null;

    public Intent getRelatedIntent() {
        return relatedIntent;
    }

    public void startActivity(){
        getContext().startActivity(getRelatedIntent());
    }

    //重写toString方法，只显示Name
    @Override
    public String toString() {
        return getControlName();
    }

}

package com.example.uiconrrol;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;

public class AtyUsingRadioGroup extends Activity {

    private RadioButton radioRight;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.aty_using_radiogroup);

        radioRight = (RadioButton) findViewById(R.id.radioRight);

        findViewById(R.id.btnSubmit).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if(radioRight.isChecked()){
                    new AlertDialog.Builder(AtyUsingRadioGroup.this).setTitle("判断").setMessage("回答正确").setPositiveButton("Cancel", null).show();
                }else{
                    new AlertDialog.Builder(AtyUsingRadioGroup.this).setTitle("判断").setMessage("回答错误").setPositiveButton("Cancel", null).show();
                }
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="老师是个帅哥吗？" />

    <RadioGroup
        android:id="@+id/radioGroup1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <RadioButton
            android:id="@+id/radioRight"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="是" />

        <RadioButton
            android:id="@+id/radioNo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="不是" />

        <RadioButton
            android:id="@+id/radio2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="不知道" />
    </RadioGroup>

    <Button
        android:id="@+id/btnSubmit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提交" />

</LinearLayout>