单选按钮（RadioButton）与复选框（CheckBox）的功能与用法

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第一步：在Main_xml文件中代码如下：

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent"    android:layout_height="fill_parent" android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context=".MainActivity">    <TableRow>        <TextView android:text="性别："            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="16px"/>        <RadioGroup android:id="@+id/rg"            android:orientation="horizontal"            android:layout_gravity="center_horizontal">            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:id="@+id/male"                android:text="男"                android:checked="true"/>            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:id="@+id/female"                android:text="女"/>        </RadioGroup>    </TableRow>    <TableRow>        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="喜欢的颜色"            android:textSize="16px"/>        <LinearLayout            android:layout_gravity="center_horizontal"            android:orientation="vertical"            android:layout_width="wrap_content"            android:layout_height="wrap_content">            <CheckBox                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="红色"                android:checked="true"/>            <CheckBox                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="蓝色"                />            <CheckBox                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="绿色"                />        </LinearLayout>    </TableRow>    <TextView        android:id="@+id/show"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/></TableLayout>

第二步，在MainActivity中的代码如下:

package com.example.yangjian.checkbuttontest;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.Menu;import android.view.MenuItem;import android.widget.RadioGroup;import android.widget.TextView;public class MainActivity extends ActionBarActivity {    RadioGroup rg;    TextView show;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        rg = (RadioGroup) findViewById(R.id.rg);        show = (TextView) findViewById(R.id.show);        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                String tip = checkedId == R.id.male ? "您的性别是男人":"您的性别是女人";                show.setText(tip);            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        //noinspection SimplifiableIfStatement        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

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