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This repository contains a sample project that demonstrate the topic discussed inmy article aboutViewModel SavedState module,which part of the Android architecture lifecycle components.

To simulate a process stop, switch to Logcat and at the lefthand corner press the Stop button to stop the process while making sure thatthe right process is selected in the dropdown box.

You will notice thatCommitListViewModel is making use ofSavedStateHandle to save the last seen page in the list.If the app recovers from a process stop, the handle will load the last seen page. We then load the data up to that page.

In this case, we're saving the state of the whole commit response object so that the next time the app recovers from aprocess stop, it will restore that last commit response object and will skip making a request to Github.

When you launch the app, pay attention to the logs in Logcat. You will see that when the activity is started for the first time, it will make the requestand then store the result inSavedStateHandle that is passed toCommitDetailViewModel. Then navigate away from the activity by simplygoing to the home screen and then navigate back. You'll see in the logs that the previously stored response is loaded fromSavedStateHandle - indicating that the state has been restored after process death.

The app is utilizing the MVVM design pattern for the UI with the help of the following libraries:

• AndroidX
• Architecture Components - ViewModel, Lifecycle, Navigation
• Material components library
• Constraint layout
• Retrofit2 + OkHttp
• Moshi
• Dagger2 + Hilt
• Timber
• Glide
• Kotlin coroutines
• Epoxy

Copyright 2020 Nimrod Dayan nimroddayan.com

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, softwaredistributed 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 andlimitations under the License.