Android中CheckBox的简单实用

CheckBox是一种在界面开发中比较常见的控件，Android中UI开发也有CheckBox，简单的说下它的使用，每个CheckBox都要设置监听，设置的监听为CompouButton.OnCheckedChangedListener（）。

 

package com.zhuguangwei;

import android.app.Activity;
import android.os.Bundle;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

public class ChkBoxActivity extends Activity {
    private TextView myTextView;
    private CheckBox myApple;
    private CheckBox myOrange;
    private CheckBox myBanana;
    private CheckBox myWaterMelon;
    private CheckBox myStrawBerry;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //通过ID找到TextView
        myTextView = (TextView) findViewById(R.id.myTextView);
        
        //通过ID找到这几个CheckBox
        myApple = (CheckBox) findViewById(R.id.Apple);
        myOrange = (CheckBox) findViewById(R.id.Orange);
        myBanana = (CheckBox) findViewById(R.id.banana);
        myWaterMelon = (CheckBox) findViewById(R.id.watermelon);
        myStrawBerry = (CheckBox) findViewById(R.id.strawberry);
        
        myApple.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    myTextView.append(myApple.getText().toString());
                }
                else{
                    if(myTextView.getText().toString().contains("苹果")){
                        myTextView.setText(myTextView.getText().toString().replace("苹果", ""));
                    }
                }
            }
        });
        
        myOrange.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    myTextView.append(myOrange.getText().toString());
                }
                else{
                    if(myTextView.getText().toString().contains("橘子")){
                        myTextView.setText(myTextView.getText().toString().replace("橘子", ""));
                    }
                }
            }
        });
        
        myBanana.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    myTextView.append(myBanana.getText().toString());
                }
                else{
                    if(myTextView.getText().toString().contains("香蕉")){
                        myTextView.setText(myTextView.getText().toString().replace("香蕉", ""));
                    }
                }
            }
        });
        
       myWaterMelon.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    myTextView.append(myWaterMelon.getText().toString());
                }
                else{
                    if(myTextView.getText().toString().contains("西瓜")){
                        myTextView.setText(myTextView.getText().toString().replace("西瓜", ""));
                    }
                }
            }
        });
       
       myStrawBerry.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    myTextView.append(myStrawBerry.getText().toString());
                }
                else{
                    if(myTextView.getText().toString().contains("草莓")){
                        myTextView.setText(myTextView.getText().toString().replace("草莓", ""));
                    }
                }
            }
        });
    }
}

 

main.xml文件内容为：

 

<?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="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="请选择你一下你喜欢吃的水果："
    />
    <CheckBox
        android:id="@+id/Apple"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="苹果"
    />
    <CheckBox
        android:id="@+id/Orange"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="橘子"
    />
    <CheckBox
        android:id="@+id/banana"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="香蕉"
    />
    <CheckBox
        android:id="@+id/watermelon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="西瓜"
    />
    <CheckBox
        android:id="@+id/strawberry"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="草莓"
    />
</LinearLayout>

 

运行结果为: