设置Android活动方向并在onStart期间锁定它

Question

我有一项活动，我希望在活动开始时根据设备的方向锁定它的方向，我似乎无法弄明白。我现在的代码是

protected void onStart() {
    super.onStart();

    int currentOrientation = getResources().getConfiguration().orientation;
    if (currentOrientation == Configuration.ORIENTATION_LANDSCAPE) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
    }
    else {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
    }
    doStuffBasedOnOrientation();

}

它似乎只适用于第一个onStart然后它将停止更改。

Answer 1

试试这个

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);

要再次允许方向，请使用

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

你也可以使用这段代码

private void lockOrientation() {

    int orientation = getResources().getConfiguration().orientation;
    int rotation = getWindowManager().getDefaultDisplay().getRotation();

    switch (rotation) {
        case Surface.ROTATION_0:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }
            break;
        case Surface.ROTATION_90:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }
            break;
        case Surface.ROTATION_180:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            }
            break;
        default:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            }
    }
}