android常用控件总结(10)

android 常用控件总结

public class Activity01 extends Activity{

public void onCreate(Bundle savedInstanceState){

super.onCreate(savedInstanceState);

setContentView(yout.main);

//获得Button对象

Button button_ok = (Button) findViewById(R.id.ok);

button_ok.setOnClickListener(new Button.OnClickListener()

{-------------------------------------------------------//设置Button控件监听器 public void onClick(View v){

//这里处理事件

DisplayToast("点击了OK按钮");

}

});

}

/* 按键按下所触发的事件*/

public boolean onKeyDown(int keyCode, KeyEvent event){

switch (keyCode){

case KeyEvent.KEYCODE_DPAD_CENTER:

DisplayToast("按下：中键");

break;

case KeyEvent.KEYCODE_DPAD_UP:

DisplayToast("按下：上方向键");

break;

case KeyEvent.KEYCODE_DPAD_DOWN:

DisplayToast("按下：下方向键");

break;

case KeyEvent.KEYCODE_DPAD_LEFT:

DisplayToast("按下：左方向键");

break;

case KeyEvent.KEYCODE_DPAD_RIGHT: