android TAB键左右键处理与Activity焦点的处理

boolean mFirstDown;

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) { mFirstDown = true; }
if(event.getKeyCode() == KeyEvent.KEYCODE_DPAD_LEFT) { if(parent != null) { DialtactsActivity da = (DialtactsActivity)parent;
if(da.mTabHost.getCurrentTab() == da.TAB_INDEX_CONTACTS && mFirstDown){ mFirstDown = false; da.mTabHost.setCurrentTab(da.TAB_INDEX_CALL_LOG);
}else{
da.mTabHost.setCurrentTab(da.TAB_INDEX_CONTACTS);
}
return true;
}
} else if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_RIGHT) { if(parent != null) { DialtactsActivity da = (DialtactsActivity)parent;
if(da.mTabHost.getCurrentTab() == da.TAB_INDEX_CONTACTS && mFirstDown){ mFirstDown = false; da.mTabHost.setCurrentTab(da.TAB_INDEX_FAVORITES);
}
return true;
}
}
return super.dispatchKeyEvent(event);
}