radio选中如何判断是哪个radio被选中

radiobutton 怎么获取选中状态

用savedInstanceState，代码如下： protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button = (Button) findViewById(R.id.button); RadioButton radiobutton1 = (RadioButton) findViewById(R.id.radiobutton1); RadioButton radiobutton2 = (RadioButton) findViewById(R.id.radiobutton2); if (savedInstanceState != null) { boolean tmp1 = savedInstanceState.getBoolean("radio1"); if (tmp1) { radiobutton1.setChecked(true); } boolean tmp2 = savedInstanceState.getBoolean("radio2"); if (tmp2) { radiobutton2.setChecked(true); } } if (IsRadioButton1Selected) { radiobutton1.setChecked(true); } if (IsRadioButton2Selected) { radiobutton2.setChecked(true); } button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent it = new Intent(MainActivity.this, SecondActivity.class); startActivity(it); } }); } @Override protected void onSaveInstanceState(Bundle outState) { RadioButton radiobutton1 = (RadioButton) findViewById(R.id.radiobutton1); RadioButton radiobutton2 = (RadioButton) findViewById(R.id.radiobutton2); if (radiobutton1.isChecked()) { IsRadioButton1Selected = true; } else if (radiobutton2.isChecked()) { IsRadioButton2Selected = true; } else Toast.makeText(this, "nothing selected", Toast.LENGTH_SHORT).show(); outState.putBoolean("radio1", IsRadioButton1Selected); outState.putBoolean("radio2", IsRadioButton2Selected); super.onSaveInstanceState(outState); } 　　更多0

javascript中判断radio是否被选中

可以直接用javascript里面radio自带属性checked，去判断radio是否被选中。

<br>下面是代码，仅供参考；<br>&lt;html&gt;<br>&lt;script?type=&quot;text/javascript&quot;&gt;<br>function?selectradio()<br>{<br>????var?arr=document.getElementsByName(&quot;radio1&quot;);<br>????for(var?i=0;i&lt;arr.length;i++)<br>????{<br>????????if(arr[i].checked)<br>????????{<br>????????????alert(arr[i].value)<br>????????}<br>????}<br>}<br>function?selectcheck()<br>{<br>????var?=document.getElementsByName(&quot;checkbox1&quot;);<br>????var?str=&quot;&quot;;<br>????for(var?i=0;i&lt;.length;i++)<br>????{<br>????????if(arr[i].checked)<br>????????{<br>????????????str+=[i].value+&quot;,&quot;;<br>????????}<br>????????alert(str);<br>????}<br>}<br>function?selectselect()<br>{<br>????var?ass=document.getElementById(&quot;select1&quot;);<br>????alert(ass.options[ass.selectedIndex].text+&quot;:&quot;+ass.options[ass.selectedIndex].value);<br>}<br>&lt;/script&gt;<br>&lt;body&gt;<br>&lt;div?align=&quot;center&quot;&gt;<br>&lt;form&gt;<br>????&lt;input?type=&quot;radio&quot;?name=&quot;radio1&quot;?value=&quot;111&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;radio&quot;?name=&quot;radio1&quot;?value=&quot;222&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;radio&quot;?name=&quot;raido1&quot;?value=&quot;333&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;button&quot;?name=&quot;submit2&quot;?value=&quot;&quot;?/&gt;<br>????&lt;br/&gt;<br>????&lt;br/&gt;<br>????&lt;input?type=&quot;checkbox&quot;?name=&quot;checkbox1&quot;?value=&quot;111&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;checkbox&quot;?name=&quot;checkbox1&quot;?value=&quot;222&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;checkbox&quot;?name=&quot;checkbox1&quot;?value=&quot;333&quot;?/&gt;&lt;br/&gt;<br>????&lt;input?type=&quot;button&quot;?name=&quot;submit&quot;?vlaue=&quot;按钮&quot;?/&gt;<br>????&lt;br/&gt;<br>????&lt;br/&gt;<br>????&lt;select?name=&quot;select&quot;?id=&quot;select1&quot;&gt;<br>????????&lt;option?value=&quot;111&quot;&gt;第一项&lt;/option&gt;<br>????????&lt;option?value=&quot;222&quot;&gt;第二项&lt;/option&gt;<br>????????&lt;option?value=&quot;333&quot;&gt;第三项&lt;/option&gt;<br>????&lt;/select&gt;<br>????&lt;input?type=&quot;button:&quot;?name=&quot;submit3&quot;?value=&quot;按钮&quot;?/&gt;<br>????&lt;br/&gt;<br>????&lt;br/&gt;<br>&lt;/form&gt;<br>&lt;/div&gt;<br>&lt;/body&gt;<br>&lt;/html&gt;

jquery radio 是否选中

//?判断id为radioId的radio是否选中 if($("#radioId:checked")[0]){ console.log("选中"); }else{ console.log("未选中"); }希望对你有帮助！

如何判断是哪个radio被选中

$(&quot;:radio&quot;).each(function(){<br>if($(this).attr(&quot;checked&quot;)){<br>alert(&quot;选中&quot;);<br>}else{<br>alert(&quot;未选中&quot;);<br>}<br>})