Question

我有一个FragmentActivity，里面有一些片段。当我从片段（片段A）开始，我将手机的纵向位置移动到下一个片段（片段B），我在代码中设置了setOrientation（）to Landscape我拿到黑色屏幕时在我将手机转为横向之前，手机的纵向和布局将不会显示在第二个片段上。我的印象是，无论你怎么拿着手机，当你做setRequestedOrientation（）时，它应该强制显示你提供的布局

视觉：

-----------         -----------         
|         |         |         |                         ---------------
|         |         |         |                         |             |
| Frag A  |   ->    | Frag B  |   -> Until I turn  ->   |   Frag B    | 
|         |(then to)| (black) |     it to Landscape     | (not black  | 
|         |         |         |                         |   anymore)  |
|         |         |         |                         ---------------
-----------         -----------

代码：

保持方向变化的MainActivity：

    // Set Orientation of the Activity.
public void setOrientation(int sensor) {
    if (sensor == 1) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
    } else if (sensor == 2) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
    } else if (sensor == 3) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
    } else if (sensor == 4) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    } else if (sensor == 5) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }
}

弗拉加：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    // Set the orientation to be in portrait and landscape.
    ((MainActivity) getActivity()).setOrientation(1);
    ...
}

FragB：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    // Set the orientation to be in landscape.
    ((MainActivity) getActivity()).setOrientation(5);
    ...
}

Answer 1

您必须在onActivityCreated中调用getActivity()

使用setRequestedOrientation（）时获得黑屏

1 个答案: