MainActivity如下:
- package cc.testradiogroup;
- import android.os.Bundle;
- import android.widget.RadioButton;
- import android.widget.RadioGroup;
- import android.widget.RadioGroup.OnCheckedChangeListener;
- import android.app.Activity;
- /**
- * Demo描述:
- * 利用自定义RadioGroup实现单选
- *
- * 参考资料:
- * 1 http://blog.csdn.net/xiaanming
- * 2 http://bbs.51cto.com/thread-954128-1.html
- *
- * Thank you very much
- */
- public class MainActivity extends Activity {
- private RadioGroup mRadioGroup;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- init();
- }
- private void init(){
- mRadioGroup=(RadioGroup) findViewById(R.id.radioGroup);
- mRadioGroup.setOnCheckedChangeListener(new RadioButtonOnCheckedChangeListenerImpl());
- }
- // 监听单选的变化
- private class RadioButtonOnCheckedChangeListenerImpl implements OnCheckedChangeListener {
- @Override
- public void onCheckedChanged(RadioGroup group, int checkedId) {
- RadioButton rb = (RadioButton) findViewById(group.getCheckedRadioButtonId());
- String currentSelected = rb.getText().toString();
- System.out.println("现在选中是:" + currentSelected);
- }
- }
- }
main.xml如下:
- <?xml version="1.0" encoding="utf-8"?>
- <!-- 步骤如下: -->
- <!--1: android:button="@null" 去掉自带的图标 -->
- <!--2:android:drawableRight="@drawable/line" 在文字的右边设置图片-->
- <!--3: android:drawablePadding="10dip" 图片与文字间的距离-->
- <!--4:android:layout_marginLeft="-17dip" 每个RadioButton距离左边缘或者距其左RadioButton的距离-->
- <LinearLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical"
- android:gravity="center_horizontal" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textSize="15sp"
- android:text="测试自定义的RadioGroup来实现单选功能" >
- </TextView>
- <RadioGroup
- android:id="@+id/radioGroup"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:orientation="horizontal"
- android:background="@drawable/bg" >
- <RadioButton
- android:id="@+id/cai"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="-17dip"
- android:checked="true"
- android:button="@null"
- android:drawableRight="@drawable/line"
- android:drawablePadding="10dip"
- android:text="菜"
- android:textColor="@drawable/text_selector" >
- </RadioButton>
- <RadioButton
- android:id="@+id/tang"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="-15dip"
- android:button="@null"
- android:drawableRight="@drawable/line"
- android:drawablePadding="10dip"
- android:text="汤"
- android:textColor="@drawable/text_selector">
- </RadioButton>
- <RadioButton
- android:id="@+id/zhushi"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="-15dip"
- android:button="@null"
- android:drawableRight="@drawable/line"
- android:drawablePadding="10dip"
- android:text="主 食"
- android:textColor="@drawable/text_selector" >
- </RadioButton>
- <RadioButton
- android:id="@+id/zhou"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="-15dip"
- android:button="@null"
- android:drawableRight="@drawable/line"
- android:drawablePadding="15dip"
- android:text="粥"
- android:textColor="@drawable/text_selector" >
- </RadioButton>
- </RadioGroup>
- </LinearLayout>
text_selector.xml如下:
- <?xml version="1.0" encoding="utf-8"?>
- <selector xmlns:android="http://schemas.android.com/apk/res/android" >
- <item android:color="#ffffff" android:state_checked="true"/>
- <item android:color="#000000"/>
- </selector>