Android控件RadioButton實現多選一功能

2019-10-22 18:30:30

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來源：轉載

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RadioButton實現多選一功能的方法，具體內容如下

一、簡介

二、RadioButton實現多選一方法

1、將多個RadioButton放在一個RadioGroup里面

<RadioGroup  android:id="@+id/radioGroup1"  android:layout_width="match_parent"  android:layout_height="wrap_content" >  <RadioButton   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="男"   android:textColor="#FFFFFF" />  <RadioButton   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="女"   android:textColor="#FFFFFF" /> </RadioGroup>

2、在RadioGroup里面取出每個RadioButton

public void onClick(View v) {    // TODO Auto-generated method stub    int len = radioGroup1.getChildCount();    for (int i = 0; i < len; i++) {     RadioButton radio = (RadioButton) radioGroup1.getChildAt(i);11     }   }

3、檢查每個RadioButton是否被選取

 if (radio.isChecked()) {      break;     }

4、取出被選取的那個RadioButton里面的值

Toast.makeText(Activity01.this, radio.getText(),        Toast.LENGTH_LONG).show();

三、代碼實例

效果圖：

代碼：

fry.Activity01

package fry;import com.example.RadioButtonDemo1.R;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.TextView;import android.widget.Toast;public class Activity01 extends Activity { private Button btn_chooseGender; private RadioGroup radioGroup1; private TextView tv_answer; @Override protected void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.activity01);  btn_chooseGender = (Button) findViewById(R.id.btn_chooseGender);  radioGroup1 = (RadioGroup) findViewById(R.id.radioGroup1);  tv_answer = (TextView) findViewById(R.id.tv_answer);  /*   * RadioButton實現多選一方法   * 1、將多個RadioButton放在一個RadioGroup里面   * 2、在RadioGroup里面取出每個RadioButton    * 3、檢查每個RadioButton是否被選取   * 4、取出被選取的那個RadioButton里面的值   */  btn_chooseGender.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    int len = radioGroup1.getChildCount();    for (int i = 0; i < len; i++) {     RadioButton radio = (RadioButton) radioGroup1.getChildAt(i);     if (radio.isChecked()) {      Toast.makeText(Activity01.this, radio.getText(),        Toast.LENGTH_LONG).show();      break;     }    }   }  }); }}

/RadioButtonDemo1/res/layout/activity01.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/black" android:orientation="vertical" > <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:text="性別"  android:textAppearance="?android:attr/textAppearanceLarge"  android:layout_gravity="center_horizontal"  android:textColor="#FFFFFF" /> <RadioGroup  android:id="@+id/radioGroup1"  android:layout_width="match_parent"  android:layout_height="wrap_content" >  <RadioButton   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="男"   android:textColor="#FFFFFF" />  <RadioButton   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="女"   android:textColor="#FFFFFF" /> </RadioGroup> <Button   android:id="@+id/btn_chooseGender"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:text="選擇性別"  android:textColor="#FFFFFF" />  />   <TextView  android:id="@+id/tv_answer"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:text=""  android:textAppearance="?android:attr/textAppearanceLarge"  android:layout_gravity="center_horizontal"  android:textColor="#FFFFFF" /></LinearLayout>

四、收獲

1、

android:textColor="#FFFFFF"

設置顏色，直接用#FFFFFF

2、

android:layout_gravity="center_horizontal"

文字居中顯示

3、

RadioButton在RadioGroup里面實現多選一

4、

android:background="@android:color/black"

設置黑色，系統自帶顏色