android Home键的截获

 @Override
  public boolean onKeyDown(int keyCode, KeyEvent event)
  {
    // TODO Auto-generated method stub
    if(KeyEvent.KEYCODE_HOME==keyCode)
      android.os.Process.killProcess(android.os.Process.myPid());
    return super.onKeyDown(keyCode, event);
  }

  @Override
  public void onAttachedToWindow()
  {
    // TODO Auto-generated method stub
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);   
    super.onAttachedToWindow();
  }

  加权限禁止Home键
  <uses-permission android:name="android.permission.DISABLE_KEYGUARD"></uses-permission>