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：
代码
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 );
}
}
});
@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：
代码
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);
}
@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：
代码
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();
}
}
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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