[英]How to lock screen orientation in reverse portrait and reverse landscape mode
int currentOrientation = getResources().getConfiguration().orientation;
if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
} else if(currentOrientation == Configuration.ORIENTATION_LANDSCAPE){
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
這是用於以編程方式鎖定屏幕方向的代碼。 但它不適用於反向縱向和反向橫向。 什么可能是解決方案。
這是在ActivityInfo
類的常量中獲取當前方向的代碼
private int getScreenOrientation() {
int rotation = getWindowManager().getDefaultDisplay().getRotation();
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = dm.heightPixels;
int orientation;
// if the device's natural orientation is portrait:
if ((rotation == Surface.ROTATION_0
|| rotation == Surface.ROTATION_180) && height > width ||
(rotation == Surface.ROTATION_90
|| rotation == Surface.ROTATION_270) && width > height) {
switch(rotation) {
case Surface.ROTATION_0:
orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
break;
case Surface.ROTATION_90:
orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
break;
case Surface.ROTATION_180:
orientation =
ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
break;
case Surface.ROTATION_270:
orientation =
ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
break;
default:
Log.e(TAG, "Unknown screen orientation. Defaulting to " +
"portrait.");
orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
break;
}
}
// if the device's natural orientation is landscape or if the device
// is square:
else {
switch(rotation) {
case Surface.ROTATION_0:
orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
break;
case Surface.ROTATION_90:
orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
break;
case Surface.ROTATION_180:
orientation =
ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
break;
case Surface.ROTATION_270:
orientation =
ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
break;
default:
Log.e(TAG, "Unknown screen orientation. Defaulting to " +
"landscape.");
orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
break;
}
}
return orientation;
}
如何在您的情況下使用:
setRequestedOrientation(getScreenOrientation());
如果有用,請參考這個答案
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