Try to amicably handle DialogFragment in FragmentManager when recreated from orientation change
- Handle finish() call instead of passing around callbacks to setOnDismissListener() - Don't start over again if returning to DialogFragment before orientation change
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@ -31,6 +31,7 @@ import androidx.appcompat.content.res.AppCompatResources;
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import androidx.core.app.NotificationCompat;
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import androidx.core.app.ServiceCompat;
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import androidx.core.math.MathUtils;
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import androidx.fragment.app.Fragment;
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import androidx.fragment.app.FragmentManager;
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import androidx.preference.PreferenceManager;
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@ -151,7 +152,32 @@ public class RouterActivity extends AppCompatActivity {
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protected void onStart() {
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super.onStart();
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handleUrl(currentUrl);
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// FragmentManager will take care to recreate DialogFragments when screen rotates
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// currently that's namely PlaylistDialog or DownloadDialog
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// We used to .setOnDismissListener(dialog ->finish()); when creating those Dialogs
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// but those callbacks won't survive a config change
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// Try an alternate approach to hook into FragmentManager instead, to that effect
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// (courtesy of https://stackoverflow.com/a/44028453)
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final FragmentManager fm = getSupportFragmentManager();
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fm.registerFragmentLifecycleCallbacks(new FragmentManager.FragmentLifecycleCallbacks() {
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@Override
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public void onFragmentViewDestroyed(@NonNull final FragmentManager fm,
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@NonNull final Fragment f) {
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super.onFragmentViewDestroyed(fm, f);
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if (fm.getFragments().isEmpty()) {
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// No more Dialog, we're done
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finish();
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}
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}
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}, false);
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// Don't overlap the DialogFragment after rotating the screen
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// If there's no DialogFragment, we're either starting afresh
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// or we didn't make it to PlaylistDialog or DownloadDialog before the orientation change
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if (fm.getFragments().isEmpty()) {
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// Start over from scratch
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handleUrl(currentUrl);
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}
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}
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@Override
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@ -659,12 +685,12 @@ public class RouterActivity extends AppCompatActivity {
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getThemeWrapperContext(),
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List.of(new StreamEntity(info)),
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playlistDialog -> {
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playlistDialog.setOnDismissListener(dialog -> finish());
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// to be handled by FragmentManager
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// playlistDialog.setOnDismissListener(dialog ->finish());
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playlistDialog.show(
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this.getSupportFragmentManager(),
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"addToPlaylistDialog"
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);
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final FragmentManager fm = getSupportFragmentManager();
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playlistDialog.show(fm, "addToPlaylistDialog");
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fm.executePendingTransactions();
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}
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),
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throwable -> handleError(this, new ErrorInfo(
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@ -684,7 +710,8 @@ public class RouterActivity extends AppCompatActivity {
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(result -> {
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final DownloadDialog downloadDialog = new DownloadDialog(this, result);
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downloadDialog.setOnDismissListener(dialog -> finish());
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// to be handled by FragmentManager since listener would be gone when recreated
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// playlistDialog.setOnDismissListener(dialog ->finish());
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final FragmentManager fm = getSupportFragmentManager();
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downloadDialog.show(fm, "downloadDialog");
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