Android 复选框CheckBox

Android 复选框CheckBox的使用

package com.radiodemo;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;

public class MainActivity extends Activity {

  /*************************************
   * 复选框CheckBox的使用
   * 
   * 1.定义见布局文件 2.事件的添加方法 3.事件的处理步骤
   * 
   ***********************************/

  private TextView textView;
  private CheckBox checkBox1, checkBox2, checkBox3;

  private String TAG = "CheckBoxDemo";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // 关联布局中的控件
    textView = (TextView) findViewById(R.id.textView);// 用来显示选择
    checkBox1 = (CheckBox) findViewById(R.id.checkBox1);
    checkBox2 = (CheckBox) findViewById(R.id.checkBox2);
    checkBox3 = (CheckBox) findViewById(R.id.checkBox3);

    checkBox1.setOnCheckedChangeListener(mCheckBoxChanged);
    checkBox2.setOnCheckedChangeListener(mCheckBoxChanged);
    checkBox3.setOnCheckedChangeListener(mCheckBoxChanged);
  }

  // 响应事件的函数。
  private CheckBox.OnCheckedChangeListener mCheckBoxChanged = new CheckBox.OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton buttonView,
        boolean isChecked) {
      // TODO Auto-generated method stub
      Log.i(TAG, "buttonView:" + buttonView + ",isChecked:" + isChecked
          + "\ntext:" + buttonView.getText());

      String string = new String("你所选的是：");

      if (checkBox1.isChecked())
        string += " " + checkBox1.getText();
      if (checkBox2.isChecked())
        string += " " + checkBox2.getText();
      if (checkBox3.isChecked())
        string += " " + checkBox3.getText();

      textView.setText(string);
    }

  };

  @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;
  }
}

资源文件main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="你所选的是：" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="AA"/>

    <CheckBox
        android:id="@+id/checkBox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="BB" />


    <CheckBox
        android:id="@+id/checkBox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CC" />
   
</LinearLayout>