Android_单选按钮（第一季重制版）

来源：互联网发布：实体店怎么开淘宝编辑：程序博客网时间：2024/04/30 16:18

1.单选按钮(RadioButton)的基本概念

2.RadioGroup与RadioButton

3.OnClickListener与OnCheckedChangeListener监听器

eg):

<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" >   <RadioGroup        android:id="@+id/radioGroupId"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:orientation="horizontal">          <RadioButton            android:id="@+id/femaleButtonId"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           android:text="female"/>              <RadioButton           android:id="@+id/maleButtonId"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           android:text="male"           />   </RadioGroup></LinearLayout>

package com.marschen.s01_e10_radio;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.widget.CompoundButton;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;public class MainActivity extends Activity {private RadioGroup radioGroup;private RadioButton femaleButton; private RadioButton maleButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);radioGroup = (RadioGroup)findViewById(R.id.radioGroupId);femaleButton = (RadioButton)findViewById(R.id.femaleButtonId);maleButton = (RadioButton)findViewById(R.id.maleButtonId);RadioGroupListener listener = new RadioGroupListener();radioGroup.setOnCheckedChangeListener(listener);RadioButtonListener radioButtonListener = new RadioButtonListener();femaleButton.setOnCheckedChangeListener(radioButtonListener);}class RadioButtonListener implements android.widget.CompoundButton.OnCheckedChangeListener{@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {System.out.println("isChecked--->" + isChecked);}}class RadioGroupListener implements OnCheckedChangeListener{@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {if(checkedId == femaleButton.getId()){System.out.println("选中了female");}else if(checkedId == maleButton.getId()){System.out.println("选中了male");}}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}

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