Source link: https://github.com/ahmedeltaher/MVP-Sample

What is MVP ?

View : is a layer that displays data and reacts to user actions. On Android, this could be an Activity, a Fragment, an android.view.View or a Dialog.
Model : is a data access layer such as database API or remote server API.
Presenter: is a layer that provides View with data from Model. Presenter also handles background tasks.

Android MVP is a way to separate Business logic from activities/views/fragments to make them independent of most lifecycle-related events. This way an application becomes simpler, overall application reliability increases up to 10 times, application code becomes shorter, code maintainability becomes better and developer's life becomes happier.

MVP vs MVC ?

What is MVP Pros and Cons?

Pros

Testable ( leading to TDD )
Maintainable ( Code reuse )
Easy to get reviewed
Information Hiding

Cons

Redundant, especially when the app size is small
Extra learning curve( maybe )
Requires time before starting coding ( but I bet, the architecture step is the must step for all development )

How does It work ?

simple and clean way , all of your calls have to be in only one direction , that is mean you shouldn't have any reference from your presenter in your useCase , and reference from your useCase in your entities , but can have a reference from useCase to presenter and from your presenter to your Android Main component (Activity , Fragment , Service , BroadCast Receiver ...... ) .

Interaction between Component

The objective is the separation of concerns by keeping the business rules not knowing anything at all about the outside world, thus, they can be tested without any dependency to any external element. To achieve this, my proposal is about breaking up the project into 3 different layers, in which each one has its own purpose and works separately from the others. It is worth mentioning that each layer uses its own data model so this independence

LICENSE

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.

Source link: https://github.com/ahmedeltaher/MVP-Sample

Resources

Start multiple Android Emulators and wait for each to boot in parallel.
Pass config.ini that'll be applied to created emulator.
Redirect Logcat output of an emulator to a file.

Tools

composer

Composer is a modern reactive replacement for square/spoon with following feature set:

Parallel test execution on multiple emulators/devices with test sharding support.
Logcat output capturing per test and for whole test run as well.
Screenshots and files pulling for each test reactively (with support for square/spoon folder structure).
JUnit4 report generation.

Testing Tools