1. 屏蔽返回键的代码:

public boolean onKeyDown(int keyCode,KeyEvent event){
 switch(keyCode){
 case KeyEvent.KEYCODE_HOME:return true;
 case KeyEvent.KEYCODE_BACK:return true;
 case KeyEvent.KEYCODE_CALL:return true;
 case KeyEvent.KEYCODE_SYM: return true;
 case KeyEvent.KEYCODE_VOLUME_DOWN: return true;
 case KeyEvent.KEYCODE_VOLUME_UP: return true;
 case KeyEvent.KEYCODE_STAR: return true;
 }
 return super.onKeyDown(keyCode, event);
 }

屏蔽home键的代码:

1.  public void onAttachedToWindow() {
 this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
 super.onAttachedToWindow();
 }