Android的RadioGroup简单使用例子

今天给大家简单介绍一下RadioGroup的使用

我这边做的是一个根据点击按钮出现相应图片的例子

RadioGroup最重要的就是在xml文件中：

首先我用的是线性布局,在布局的上面是一张图片，下面则是一些按钮

<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" >

<ImageView
android:id="@+id/iv_main_iv1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:scaleType="fitXY"
android:src="@drawable/s1"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<RadioGroup
android:id="@+id/rg_main_rg1"
android:layout_width="0dp"
android:layout_weight="3"
android:layout_height="wrap_content"
android:orientation="vertical"
>

<RadioButton
android:id="@+id/rb_main_rb1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="杨幂"

/>
<RadioButton
android:id="@+id/rb_main_rb2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="雪泫"
/>
<RadioButton
android:id="@+id/rb_main_rb3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="雪莉"

/>
<RadioButton
android:id="@+id/rb_main_rb4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="四号佳丽"
/>
<RadioButton
android:id="@+id/rb_main_rb5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="五号佳丽"

/>
<RadioButton
android:id="@+id/rb_main_rb6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="六号佳丽"
/>
</RadioGroup>

</LinearLayout>

</LinearLayout>

定义一个图片的数组，把图片存放进去

在点击的时候给按钮加一个selectIndex,这个selectIndex就是数组图片所在的下标

package com.example.a07_h01;

import android.os.Bundle;

import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends Activity implements View.OnClickListener{

private ImageView iv_main_iv1;

private RadioGroup rg_main_rg1;

private RadioButton rb_main_rb1;
private RadioButton rb_main_rb2;
private RadioButton rb_main_rb3;
private RadioButton rb_main_rb4;
private RadioButton rb_main_rb5;
private RadioButton rb_main_rb6;

private int imagIds[]={R.drawable.ym,R.drawable.xx,R.drawable.xl,
R.drawable.s4,R.drawable.s5,R.drawable.s6,};

private int selectIndex=0;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViews();
iv_main_iv1.setImageResource(imagIds[selectIndex]);

rb_main_rb1.setOnClickListener(this);
rb_main_rb2.setOnClickListener(this);
rb_main_rb3.setOnClickListener(this);
rb_main_rb4.setOnClickListener(this);
rb_main_rb5.setOnClickListener(this);
rb_main_rb6.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.rb_main_rb1:
selectIndex=0;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;
case R.id.rb_main_rb2:
selectIndex=1;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;
case R.id.rb_main_rb3:
selectIndex=2;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;
case R.id.rb_main_rb4:
selectIndex=3;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;
case R.id.rb_main_rb5:
selectIndex=4;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;
case R.id.rb_main_rb6:
selectIndex=5;
iv_main_iv1.setImageResource(imagIds[selectIndex]);
break;

}
}

private void findViews(){
iv_main_iv1=(ImageView)findViewById(R.id.iv_main_iv1);
rg_main_rg1=(RadioGroup)findViewById(R.id.rg_main_rg1);
rb_main_rb1=(RadioButton)findViewById(R.id.rb_main_rb1);
rb_main_rb2=(RadioButton)findViewById(R.id.rb_main_rb2);
rb_main_rb3=(RadioButton)findViewById(R.id.rb_main_rb3);
rb_main_rb4=(RadioButton)findViewById(R.id.rb_main_rb4);
rb_main_rb5=(RadioButton)findViewById(R.id.rb_main_rb5);
rb_main_rb6=(RadioButton)findViewById(R.id.rb_main_rb6);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}