Android开发中CheckBox的简单用法示例

2019-12-12 06:05:55

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本文实例讲述了Android开发中CheckBox的简单用法。分享给大家供大家参考，具体如下：

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: