C說話的遞歸思惟實例剖析

C說話的遞歸思惟實例剖析。本站提示廣大學習愛好者：（C說話的遞歸思惟實例剖析）文章只能為提供參考，不一定能成為您想要的結果。以下是C說話的遞歸思惟實例剖析正文

本文實例講述了Android RadioGroup和RadioButton控件簡略用法。分享給年夜家供年夜家參考，詳細以下：

RadioGroup和RadioButton代表的是Android中單選按鈕的一種控件，寫個簡略的代碼熟習一下：

import android.app.Activity;
import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;
public class Radio extends Activity {
  private TextView myTextView;
  private RadioButton chinaBtn;
  private RadioButton ukBtn;
  private RadioButton usaBtn;
  private RadioGroup rg;
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    //經由過程ID找到TextView
    myTextView = (TextView) findViewById(R.id.myTextView);
    //經由過程ID找到RadioButton
    chinaBtn = (RadioButton) findViewById(R.id.china_Button);
    ukBtn = (RadioButton) findViewById(R.id.uk_Button);
    usaBtn = (RadioButton) findViewById(R.id.usa_Button);
    //經由過程ID找到RadioGroup
    rg = (RadioGroup) findViewById(R.id.rBtnGroup);
    //只需對RadioGroup停止監聽
    rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(RadioGroup group, int checkedId) {
        // TODO Auto-generated method stub
        if(R.id.china_Button == checkedId){
          myTextView.setText("您選擇的國度是：" + chinaBtn.getText().toString());
        }
        else if(R.id.uk_Button == checkedId){
          myTextView.setText("您選擇的國度是：" + ukBtn.getText().toString());
        }
        else if(R.id.usa_Button == checkedId){
          myTextView.setText("您選擇的國度是：" + usaBtn.getText().toString());
        }
      }
    });
  }
}

main.xml文件以下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello"
  />
  <RadioGroup android:id="@+id/rBtnGroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        >
    <RadioButton
      android:id="@+id/china_Button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="中國"
    />
    <RadioButton
      android:id="@+id/uk_Button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="英國"
    />
    <RadioButton
      android:id="@+id/usa_Button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="美國"
    />
  </RadioGroup>
</LinearLayout>

後果以下：

願望本文所述對年夜家Android法式設計有所贊助。