Android開發(fā)中CheckBox的簡(jiǎn)單用法示例

2019-12-12 06:05:55

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本文實(shí)例講述了Android開發(fā)中CheckBox的簡(jiǎn)單用法。分享給大家供大家參考，具體如下：

CheckBox是一種在界面開發(fā)中比較常見的控件，Android中UI開發(fā)也有CheckBox，簡(jiǎn)單的說(shuō)下它的使用，每個(gè)CheckBox都要設(shè)置監(jiān)聽，設(shè)置的監(jiān)聽為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);    //通過(guò)ID找到TextView    myTextView = (TextView) findViewById(R.id.myTextView);    //通過(guò)ID找到這幾個(gè)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("蘋果")){            myTextView.setText(myTextView.getText().toString().replace("蘋果", ""));          }        }      }    });    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文件內(nèi)容為：

<?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="請(qǐng)選擇你一下你喜歡吃的水果："  />  <CheckBox    android:id="@+id/Apple"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="蘋果"  />  <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>

運(yùn)行結(jié)果為: