安卓课程十八 RadioButton单选按钮的使用

安卓课程十八 RadioButton单选按钮的使用：

具体内容实现查看网页：http://sarin.iteye.com/blog/1636484

activity_main.xml

RadioGroup android:id="@+id/idGroup"         android:layout_width="wrap_content"         android:layout_height="wrap_content"                android:orientation="horizontal">                <RadioButton android:layout_width="wrap_content"             android:id="@+id/radio_boy"            android:layout_height="wrap_content"             android:text="@string/sex_boy"            android:checked="true"                      />        <RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content"             android:id="@+id/radio_girl"            android:text="@string/sex_girl"            />    </RadioGroup>    <Button        android:layout_width="fill_parent" android:layout_height="wrap_content"        android:text="@string/selectBtn"       android:id="@+id/selectBtn"         />

MainActivity.java

import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.Toast;public class MainActivity extends Activity {private Button btn;private RadioGroup radioGroup;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);radioGroup = (RadioGroup) this.findViewById(R.id.idGroup);btn = (Button) this.findViewById(R.id.selectBtn);btn.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {int radioCount = radioGroup.getChildCount();RadioButton radioButton;String msg = "";for (int i = 0; i < radioCount; i++) {radioButton =(RadioButton) radioGroup.getChildAt(i) ;if(radioButton.isChecked()){msg = radioButton.getText().toString();break;}}Toast.makeText(MainActivity.this,msg,Toast.LENGTH_SHORT).show();}});} }

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