Android控件之——RadioGroup

Android控件之——RadioGroup、CheckBox

在界面程序开发中，常常使用到单选框和多选框，如：性别选择、单选题、多选题等。以下是Android中单选控件和多选控件的一种用法：

xml文件如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <RadioGroup         android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:id="@+id/radioGroup">                <RadioButton             android:id="@+id/male"            android:text="男"/>                <RadioButton             android:id="@+id/female"            android:text="女"/>                <CheckBox             android:id="@+id/checkA"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:text="A.中国"/>        <CheckBox     android:id="@+id/checkB"    android:layout_width="fill_parent"            android:layout_height="wrap_content"    android:text="B.美国"/><CheckBox             android:id="@+id/checkC"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:text="C.德国"/>        <CheckBox     android:id="@+id/checkD"    android:layout_width="fill_parent"            android:layout_height="wrap_content"    android:text="D.法国"/>    </RadioGroup></LinearLayout>

Java代码如下：

package my.check.namespace;import android.app.Activity;import android.os.Bundle;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;import android.widget.Toast;public class MainActivity extends Activity {private RadioButton male = null;private RadioButton female = null;private RadioGroup  group = null;private CheckBox checkA,checkB,checkC,checkD;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                male = (RadioButton)findViewById(R.id.male);        female = (RadioButton)findViewById(R.id.female);        group = (RadioGroup)findViewById(R.id.radioGroup);                checkA = (CheckBox)findViewById(R.id.checkA);        checkB = (CheckBox)findViewById(R.id.checkB);        checkC = (CheckBox)findViewById(R.id.checkC);        checkD = (CheckBox)findViewById(R.id.checkD);                /*单选框监听器*/        group.setOnCheckedChangeListener(new OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stubif(male.getId() == checkedId){dispToast("你选择：男");}else if(female.getId() == checkedId){dispToast("你选择：女");}}        });                /*多选框监听器*/        checkA.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stubif(isChecked){dispToast("你选择A.中国");}else{dispToast("你取消了选择A");}}        });                /*多选框监听器*/        checkB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stubif(isChecked){dispToast("你选择B.美国");}else{dispToast("你取消了选择B");}}        });                /*多选框监听器*/        checkC.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stubif(isChecked){dispToast("你选择C.德国");}else{dispToast("你取消了选择C");}}        });                /*多选框监听器*/        checkD.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stubif(isChecked){dispToast("你选择D.法国");}else{dispToast("你取消了选择D");}}        });    }        public void dispToast(String text){        Toast toast = Toast.makeText(this, text, Toast.LENGTH_LONG);    toast.show();    }}