Android 中CheckBox的isChecked的使用实例详解

/* import程序略 */

 

public class EX04_04 extends Activity

{

 /** Called when the activity is first created. */

 

 /*声明 TextView、CheckBox、Button对象*/

 public TextView myTextView1;

 public TextView myTextView2;

 public CheckBox myCheckBox;

 public Button myButton;

 

 @Override

 public void onCreate(Bundle savedInstanceState)

 {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.main);

 

 /*取得TextView、CheckBox、Button*/

 myTextView1 = (TextView) findViewById(R.id.myTextView1);

 myTextView2 = (TextView) findViewById(R.id.myTextView2);

 myCheckBox = (CheckBox) findViewById(R.id.myCheckBox);

 myButton = (Button) findViewById(R.id.myButton);

 

 /*将CheckBox、Button默认为未选择状态*/

 myCheckBox.setChecked(false);

 myButton.setEnabled(false);

 

 myCheckBox.setOnClickListener(new CheckBox.OnClickListener()

 {

  @Override

  public void onClick(View v)

  {

  // TODO Auto-generated method stub

  if(myCheckBox.isChecked())

  {

   /*设置Button为不能选择对象*/

   myButton.setEnabled(true);

   myTextView2.setText("");

  }

  else

  {

   /*设置Button为可以选择对象*/

   myButton.setEnabled(false);

   myTextView1.setText(R.string.text1);

   /*在TextView2里显示出"请勾选我同意"*/

   myTextView2.setText(R.string.no);   

  }

  }

 });

  

 myButton.setOnClickListener(new Button.OnClickListener()

 {

  // 程序略

  });

 

 }

}

 

myTextView1 = (TextView) findViewById(R.id.myTextView1);

myTextView2 = (TextView) findViewById(R.id.myTextView2);

myCheckBox = (CheckBox) findViewById(R.id.myCheckBox);

myButton = (Button) findViewById(R.id.myButton);

myCheckBox.setChecked(false);

 

/*利用setHIT抓取strings里面的值*/

CharSequence hint = getString(R.string.hello);

myCheckBox.setHint(hint);

 

/*设置文字颜色*/

myCheckBox.setHintTextColor(Color.RED);