Android學習筆記之CheckBox

CheckBox複選按鈕是一種有雙狀態按鈕的特殊類型，可以選中或者不選中。可以現在布局檔案中定義多選按鈕，然後對每一個多選按鈕進行事件監setOnCheckedChangeListener，通過isChecked來判斷選項是否被選中


 
main.xml
 
<?xml version="1.0" encoding="utf-8"?> 
<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:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="@string/theme" /> 
    <CheckBox  
        android:id="@+id/apple" 
        android:text="@string/apple" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/> 
    <CheckBox 
        android:id="@+id/banana" 
        android:text="@string/banana" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/> 
         
 
</LinearLayout> 
 
RadioGroupActivity.java
 
package Android.Activity; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.CheckBox; 
import android.widget.CompoundButton; 
import android.widget.Toast; 
 
 
public class RadioGroupActivity extends Activity { 
    /** Called when the activity is first created. */ 
    private CheckBox appleCheck = null; 
    private CheckBox bananaCheck = null; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        //通過控制項的ID來得到代表控制項的對象 
        appleCheck = (CheckBox)findViewById(R.id.apple); 
        bananaCheck = (CheckBox)findViewById(R.id.banana); 
        //為RadioGroup設定監聽器，需要注意的是，這裡的監聽器和Button控制項的監聽器有所不同 
        appleCheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 
             
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
                // TODO Auto-generated method stub 
                if(isChecked){ 
                    Toast.makeText(RadioGroupActivity.this,"恭喜你，還剩很多蘋果", Toast.LENGTH_LONG).show(); 
                } 
            } 
        });  www.2cto.com
         
        bananaCheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 
             
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
                // TODO Auto-generated method stub 
                if(isChecked){ 
                    Toast.makeText(RadioGroupActivity.this,"恭喜你，還剩很多香蕉", Toast.LENGTH_LONG).show(); 
                } 
            } 
        }); 
    } 
}   

摘自 落日小屋