Android 小項目之--猜名字有獎！RadionButton 和RadionGroup應用（附源碼）

　　有想過友Android的小屏幕上把asp.net 的RadionButtonList搬進來用嗎？答案是肯定的，Android 的Tool工具提供了一個RadioGroup控件，可將各大自不同的RadioButton設限于同一個Radio按鈕組，這樣子就可以做到單選的效果了，那要怎么樣用呢？先看截圖：

我們要做的事是：當用戶猜題或者選擇一個特定某個選項時，我們將在後臺判斷用戶是否選中，如果選中者相應的做出處理，具體處理看各自項目的需求，代碼片段一：

 

mButton.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(mRadioButton1.isChecked())
                {
                    mRadioButton1.setChecked(false);
                }
                if(mRadioButton2.isChecked())
                {
                    mRadioButton2.setChecked(false);
                }
                if(mRadioButton3.isChecked())
                {
                    mRadioButton3.setChecked(false);
                }
                if(mRadioButton4.isChecked())
                {
                    mRadioButton4.setChecked(false);
                }
                
            }
        });

 

 

按鈕事件，重置選中按鈕為未選中狀態。

代碼片段二：

 

 list=new OnCheckedChangeListener() {
            
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                RadioButton btn=(RadioButton)findViewById(checkedId);
                if(btn.isChecked())
                {
                     switch (checkedId) {
                        case R.id.RadioButton01:
                            
                        
                                Show("回答錯誤！");
                            
                            break;
                        case R.id.RadioButton02:
                            
                                Show("回答錯誤！");
                            
                            break;
                        case R.id.RadioButton03:
                            
                                Show("回答正確,獎勵你100分");
                            
                            break;
                        case R.id.RadioButton04:
                             
                                Show("回答錯誤！");
                             
                            break;
                             
                        }           
                }
            
            }
        };
        
         mGroup.setOnCheckedChangeListener(list);
    }

 

 

步驟分析：一，通過checkid判斷用戶選中哪一個按鈕再判斷，如果狀態為ischeck()則做出相應處理

二，通過checkid做出彈出處理效果

完整代碼如下：

 

package cn.terry;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*; 
import android.widget.RadioGroup.OnCheckedChangeListener;
public class TestRadioButton extends Activity {
    private RadioGroup mGroup;
    private Button mButton;
    private RadioButton mRadioButton1;
    private RadioButton mRadioButton2;
    private RadioButton mRadioButton3;
    private RadioButton mRadioButton4; 
    private OnCheckedChangeListener list;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mGroup=(RadioGroup)findViewById(R.id.group);
        mButton=(Button)findViewById(R.id.Button1);
        mRadioButton1=(RadioButton)findViewById(R.id.RadioButton01);
        mRadioButton2=(RadioButton)findViewById(R.id.RadioButton02);
        mRadioButton3=(RadioButton)findViewById(R.id.RadioButton03);
        mRadioButton4=(RadioButton)findViewById(R.id.RadioButton04);
       
        mButton.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(mRadioButton1.isChecked())
                {
                    mRadioButton1.setChecked(false);
                }
                if(mRadioButton2.isChecked())
                {
                    mRadioButton2.setChecked(false);
                }
                if(mRadioButton3.isChecked())
                {
                    mRadioButton3.setChecked(false);
                }
                if(mRadioButton4.isChecked())
                {
                    mRadioButton4.setChecked(false);
                }
                
            }
        });
       
        list=new OnCheckedChangeListener() {
            
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                RadioButton btn=(RadioButton)findViewById(checkedId);
                if(btn.isChecked())
                {
                     switch (checkedId) {
                        case R.id.RadioButton01:
                            
                        
                                Show("回答錯誤！");
                            
                            break;
                        case R.id.RadioButton02:
                            
                                Show("回答錯誤！");
                            
                            break;
                        case R.id.RadioButton03:
                            
                                Show("回答正確,獎勵你100分");
                            
                            break;
                        case R.id.RadioButton04:
                             
                                Show("回答錯誤！");
                             
                            break;
                             
                        }           
                }
            
            }
        };
        
         mGroup.setOnCheckedChangeListener(list);
    }
    
    public void Show(String msg)
    {
        new AlertDialog.Builder(TestRadioButton.this)
        .setTitle("提示")
        .setMessage(msg)
        .setPositiveButton("確定", null).create().show();
    }
    
    
    
    
    
    
}

 

源碼下載：/Files/TerryBlog/TestRadioButton.rar

 

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