Pendingintent getbroadcast lost parcelable data
Following the suggesting of @David Wasser in the comments underneath the question, I was able to resolve the same problem like this:
public static void setAlarm(@NonNull Context context, @NonNull Todo todo) {
...
Intent intent = new Intent(context, AlarmReceiver.class);
Bundle todoBundle = new Bundle();
todoBundle.putParcelable("KEY_TODO", todo);
intent.putExtra("KEY_TODO", todoBundle); // i just reuse the same key for convenience
...
}
Then in the broadcast receiver extract the bundle like this:
public void onReceive(Context context, Intent intent) {
Bundle todoBundle = intent.getBundleExtra("KEY_TODO");
Todo todo;
if (todoBundle != null ) {
todo = todoBundle.getParcelable("KEY_TODO");
}
}
Quoting myself:
Custom
Parcelable
classes — ones unique to your app, not a part of the Android framework — have had intermittent problems over the years when used asIntent
extras. Basically, if a core OS process needs to modify theIntent
extras, that process winds up trying to recreate yourParcelable
objects as part of setting up the extrasBundle
for modification. That process does not have your class and so it gets a runtime exception.One area where this can occur is with
AlarmManager
. Code that used customParcelable
objects withAlarmManager
that might have worked on older versions of Android will not work on Android N.
The most efficient workaround that I know of is to manually convert the Parceable
yourself into a byte[]
and put that in the Intent
extra, manually converting it back into a Parcelable
as needed. This Stack Overflow answer
shows the technique, and this sample project provides a complete working sample.
The key bits are the conversions between the Parcelable
and the byte[]
:
/***
Copyright (c) 2016 CommonsWare, LLC
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy
of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
by applicable law or agreed to in writing, software distributed under the
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
OF ANY KIND, either express or implied. See the License for the specific
language governing permissions and limitations under the License.
From _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.parcelable.marshall;
import android.os.Parcel;
import android.os.Parcelable;
// inspired by https://stackoverflow.com/a/18000094/115145
public class Parcelables {
public static byte[] toByteArray(Parcelable parcelable) {
Parcel parcel=Parcel.obtain();
parcelable.writeToParcel(parcel, 0);
byte[] result=parcel.marshall();
parcel.recycle();
return(result);
}
public static <T> T toParcelable(byte[] bytes,
Parcelable.Creator<T> creator) {
Parcel parcel=Parcel.obtain();
parcel.unmarshall(bytes, 0, bytes.length);
parcel.setDataPosition(0);
T result=creator.createFromParcel(parcel);
parcel.recycle();
return(result);
}
}