RadioButton

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RadioButton结合RadioGroup实现单项选择

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="性别" />        <RadioGroup            android:id="@+id/sex"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="10sp"            android:orientation="vertical" >            <RadioButton                android:id="@+id/nan"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="男" />            <RadioButton                android:id="@+id/nv"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="女" />        </RadioGroup>    </LinearLayout>    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="选择性别" /></LinearLayout>

package com.example.android_radiobutton;import android.os.Bundle;import android.app.Activity;import android.util.Log;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 RadioGroup radioGroup;private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);radioGroup = (RadioGroup) findViewById(R.id.sex);button = (Button) findViewById(R.id.button1);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubint radioButtonCount=radioGroup.getChildCount();/*for(int i=0;i<radioButtonCount;i++){RadioButton radioButton=(RadioButton) radioGroup.getChildAt(i);String text=radioButton.getText().toString();Toast.makeText(MainActivity.this,text, 1).show();}*/RadioButton radioButton1 = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());String text=radioButton1.getText().toString();Toast.makeText(MainActivity.this,text, 1).show();}});return true;}}

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