android RadioGroup实现单选以及默认选中

谁借莪１个温暖的怀抱￠ 2022-08-23 14:58 667阅读 0赞

代码下载链接：[http://download.csdn.net/detail/a123demi/7511835][http_download.csdn.net_detail_a123demi_7511835]

本文将通过radiogroup和radiobutton实现组内信息的单选,

其中radiogroup就是将radiobutton进行分组,同一管理和控制

同时实现默认选中情况,获取默认值.效果图

![Center][]

具体实例如下：

1.activity\_main.xml

2.strings.xml

<?xml version="1.0" encoding="utf-8"?>
    <resources>
    
        <string name="app_name">RadioGroupDemo</string>
        <string name="please_selected">请选择你的性别：</string>
        <string name="action_settings">Settings</string>
        <string name="man">男</string>
        <string name="woman">女</string>
    
    </resources>

3.MainActivity.java

protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            
            defaultStr = this.getResources().getString(R.string.please_selected);
            seletedTv = (TextView) this.findViewById(R.id.diplay_seleted_item_tv);
            sexRg = (RadioGroup) this.findViewById(R.id.sex_rg);
            manRb = (RadioButton) this.findViewById(R.id.man_rb);
            womanRb = (RadioButton) this.findViewById(R.id.woman_rb);
            
            manRb.setChecked(true);
            seletedTv.setText(defaultStr + manRb.getText().toString());
            
            sexRg.setOnCheckedChangeListener(new OnCheckedChangeListener(){
    
    			@Override
    			public void onCheckedChanged(RadioGroup rg, int checkedId) {
    				// TODO Auto-generated method stub
    				if(checkedId == manRb.getId()){
    					seletedTv.setText(defaultStr + manRb.getText().toString());
    				}else if(checkedId == womanRb.getId()){
    					seletedTv.setText(defaultStr + womanRb.getText().toString());
    				}else{
    					seletedTv.setText(defaultStr);
    				}
    			}
            });
        }

[http_download.csdn.net_detail_a123demi_7511835]: http://download.csdn.net/detail/a123demi/7511835
[Center]: /images/20220823/73ba2ddc08ba45bfad050f2197b1c5d1.png