Sorry i am not a kotlin developer, but this solution fixed mine. But before i post the codes, let me explain it to you, although it's not the most reliable but a better option.
Note: If you add these lines to your manifest, there are a lot of android configuration changes that will not be handled by below lines.
Take for instance you added this line to your manifest file.
android:configChanges="orientation|screenSize|keyboardHidden|smallestScreenSize|screenLayout">
Now, i'll prove to you that adding above line is not an option at all:
Firstly, assuming this line is still in your manifest file, then if your app targets Api level 29 and above, toggle the android system ui dark mode which is located in Settings > Display & Brightness > Dark theme then return back to your app and you'll notice that your activity has been recreated and the video restarts.
Now, to avoid that, then you'll need to add Uimode to the above line of code.
android:configChanges="uimode|orientation|screenSize|keyboardHidden|smallestScreenSize|screenLayout" >
(Notice the difference between it and the first code)
Now that you've added uimode to configChanges, the particular activity won't be able to detect changes when the android system ui dark mode switch is toggled. But it's still not the best because it will cause the following:
- A bad user experience whereby if a user switches theme but theme changes doesn't reflect in your app.
- Let's assume that you have an Alert dialog that's still showing and you rotate your screen, the width tends to overlap the screen due to the smallestScreenSize | screenLayout attribute.
- Let's assume that you're onMultiWindowChanged, it'll cause bad user experience too wherby the activity will want to resize and recreate the screen ui layout in order to adjust to the multi window mode but you'll end up seeing overlaps.
Anyways, there are so many configuration changes that will cause activity to restart and instead of adding this line and changing the configChanges attribute everytime just make use of the:
- onSavedInsatnceState and onRestoreInstanceState attributes or
- Make use of android new method of saving ui state which is viewModel and savedStateHandle
Now, if you want use method 1, you need to understand Android lifecycle architecture component first then use the onSavedInsatnceState to save and use the onRestoreInsatnceState to restore the ui states. But according to https://developer.android.com/reference/android/app/Activity
Starting with Honeycomb, an application is not in the killable state until its onStop() has returned. This impacts when onSaveInstanceState(android.os.Bundle) may be called (it may be safely called after onPause()) and allows an application to safely wait until onStop() to save persistent state.
Declare this as global variable
private final String KEY_YOUTUBE_VIDEO_LENGTH_STATE = "youtube_length_state";
Override onSavedInsatnceState method and add below codes.
@Override
protected void onSaveInstanceState(Bundle savedInstanceState) {
// save YouTube video length state
long videoStateLong = binding.youtubePlayer.getVideoLength();
savedInstanceState.putLong(KEY_YOUTUBE_VIDEO_LENGTH_STATE, videoStateLong);
//Call below line to save bundle
super.onSaveInstanceState(savedInstanceState);
}
Then override onRestoreInstanceState and add below lines.
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
// Retrieve video state and it's length.
if(savedInstanceState != null) {
binding.youtubePlayer.setVideoLength = savedInstanceState.getLong(KEY_YOUTUBE_VIDEO_LENGTH_STATE);
}
Finally, incase onRestoreInstanceState is not called then override onResume method and add below lines of codes.
@Override
protected void onResume() {
super.onResume();
Bundle savedInstanceState = new Bundle();
if (savedInstanceState != null) {
binding.youtubePlayer.getVideoLength.onRestoreInstanceState(KEY_YOUTUBE_VIDEO_LENGTH_STATE);
}
}
Now, in the onCreate method, add below lines
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState==null){
playVideoFromBeginning(); // No video length is saved yet, play video from beginning
}else{
restoreVideoPreviousLength(savedInstanceState); // Restore video length found in the Bundle and pass savedInstanceState as an argument
}
}
public void restoreVideoPreviousLength(Bundle savedInstanceState) {
binding.youtubePlayer.setVideoLength = savedInstanceState.getLong(KEY_YOUTUBE_VIDEO_LENGTH_STATE);
}
Note:
- codes in onCreate method will only work for screen rotations but those in onResume will work for uimode change etc.
- onSavedInsatnceState and onRestoreInstanceState should NEVER be used to store large datasets like fetching Recyclerview items. ViewModel should be used in cases like this instead.
Now, if you want to use the second method which is viewModel method:
Note: ViewModel's only responsibility is to manage the data for the UI. It should never access your view hierarchy or hold a reference back to the Activity or the Fragment.
Now you can learn more from here https://www.geeksforgeeks.org/viewmodel-with-savedstate-in-android/
Remember, i'm not a kotlin developer
