https://github.com/eranboudjnah/solid
Solid Android components
https://github.com/eranboudjnah/solid
activity android android-library dependency-injection dry fragment kotlin recyclerview solid solid-components
Last synced: 9 months ago
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Solid Android components
- Host: GitHub
- URL: https://github.com/eranboudjnah/solid
- Owner: EranBoudjnah
- License: mit
- Created: 2019-11-21T10:09:16.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2021-04-12T16:52:34.000Z (almost 5 years ago)
- Last Synced: 2025-03-31T16:11:13.444Z (10 months ago)
- Topics: activity, android, android-library, dependency-injection, dry, fragment, kotlin, recyclerview, solid, solid-components
- Language: Kotlin
- Size: 428 KB
- Stars: 35
- Watchers: 4
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# SOLID Components
[](https://mvnrepository.com/artifact/com.mitteloupe.solid/solidapplication)
[](https://mvnrepository.com/artifact/com.mitteloupe.solid/solidactivity)
[](https://mvnrepository.com/artifact/com.mitteloupe.solid/solidfragment)
[](https://mvnrepository.com/artifact/com.mitteloupe.solid/solidservice)
[](https://mvnrepository.com/artifact/com.mitteloupe.solid/solidrecyclerview)
[](https://travis-ci.com/EranBoudjnah/solid)
[](https://github.com/EranBoudjnah/solid/blob/master/LICENSE)
[](https://developer.android.com/reference)
SOLID Components are an attempt at following good engineering standards and best practices such as [SOLID](https://en.wikipedia.org/wiki/SOLID) and [DRY](https://en.wikipedia.org/wiki/Don%27t_repeat_yourself) where Google neglected to.
## Installation
And the implementation dependencies below. You can add just the components you need.
```groovy
dependencies {
implementation "com.mitteloupe.solid:solidapplication:1.0.8"
implementation "com.mitteloupe.solid:solidactivity:1.0.8"
implementation "com.mitteloupe.solid:solidfragment:1.0.7"
implementation "com.mitteloupe.solid:solidservice:1.0.8"
implementation "com.mitteloupe.solid:solidrecyclerview:1.0.5"
}
```
## Usage
### Application
Make your app Application instance extend `SolidApplication`. To implement functionality, simply override
`lifecycleHandlers`, `configurationChangeHandlers` or `memoryHandlers`, providing relevant handlers.
### Activity
Use `SolidActivity` as the parent activity of any activity in your app. Instead of having a *BaseActivity*, you can now provide common activity code by overriding one or more of the handler lists, providing a list of handlers.
Common use cases can include dependency injection, analytics, logging, setting up of ViewHolders.
A `Koin` injection handler will look as follows:
```kotlin
class KoinActivityScopeHandler(
private val activity: Activity,
private val currentScope: Scope
) : LifecycleHandler {
override fun onCreate(savedInstanceState: Bundle?) {
currentScope.declare(activity)
}
}
```
Implement an activity using the handler as follows:
```kotlin
class MainActivity : SolidActivity() {
override val lifecycleHandlers = listOf(
KoinActivityScopeHandler(this, currentScope),
...
)
...
}
```
### Fragment
Use `SolidFragment` as the parent fragment of any fragment in your app. Instead of having a *BaseFragment*, you can now provide common fragment code by overriding one or more of the handler lists, providing a list of handlers.
Common use cases can include dependency injection, analytics, logging, setting up of ViewHolders.
A `Koin` injection handler will look as follows:
```kotlin
class KoinFragmentScopeHandler(
private val fragment: Fragment,
private val currentScope: Scope
) : LifecycleHandler {
override fun onCreate(savedInstanceState: Bundle?) {
currentScope.declare(fragment)
}
}
```
Implement an fragment using the handler as follows:
```kotlin
class MainFragment : SolidFragment() {
override val lifecycleHandlers = listOf(
KoinFragmentScopeHandler(this, currentScope),
...
)
...
}
```
### Service
`SolidService` allows composing services instead of inheriting from base services.
As an example, an `IntentService` using `SolidService` would look like this:
```kotlin
class SolidIntentService : SolidService() {
override val lifecycleHandlers = listOf(
IntentHandler(this, { intent -> handleIntent(intent) })
)
private fun handleIntent(intent: Intent?) {
...
}
}
```
### Adapter
Instead of setting a `RecyclerView.Adapter` to your RecyclerView, simply set a `SolidAdapter`.
`SolidAdapter` has a few constructor-injected dependencies that define its behaviour:
1. `ViewProvider` - this will provide child Views for your RecyclerView. A handy `InflatedViewProvider` is available for simple layout inflation.
2. viewHolderProvider - this is a lambda that, given a View, returns a ViewHolder. It is worth noting that when using a `SolidAdapter`, ViewHolder do just that. They hold references to Views (commonly obtained by calling `findViewById()`). This is their sole responsibility.
3. `ViewBinder` - this will bind a data item to views provided by a ViewHolder.
4. itemsSynchronizerProvider - this is a lambda that, given a `RecyclerView.Adapter`, returns an `ItemsSynchronizer`. The responsibility of `ItemsSynchronizer` is to hold the data items and synchronize changes with the `RecyclerView.Adapter`. If not provided, the `SolidAdapter` uses a default `SimpleItemsSynchronizer`, which provides most common functionality.
5. positionToType - this is a lambda that, given an `ItemsSynchronizer` instance and a position, returns the view type for that position. By default, it always returns `ITEM_TYPE_DEFAULT`.
#### Comparison
Let's take a look at a simple, common RecyclerView.Adapter implementation:
Without SolidAdapter:
```kotlin
class MoodViewHolder(
override val containerView: View
) : RecyclerView.ViewHolder(containerView), LayoutContainer {
val iconView: ImageView = layoutIconView
val titleView: TextView = layoutTitleView
override fun bindData(moodItem: MoodUiModel) {
iconView.setImageDrawable(
AppCompatResources.getDrawable(context, data.iconResourceId)
)
indexView.text = data.title
}
}
class ListItemsAdapter(
private val layoutInflater: LayoutInflater
) : RecyclerView.Adapter() {
private val listData = mutableListOf()
fun setData(listData: List) {
this.listData.clear()
this.listData.addAll(listData)
notifyDataSetChanged()
}
fun removeItem(position: Int) {
listData.removeAt(position)
notifyItemRemoved(position)
}
fun addItem(position: Int, item: ListItemUiModel) {
listData.add(position, item)
notifyItemInserted(position)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MoodViewHolder {
val view = layoutInflater.inflate(R.layout.item_mood, parent, false)
return MoodViewHolder(view)
}
override fun getItemCount() = listData.size
override fun onBindViewHolder(holder: ListItemViewHolder, position: Int) {
holder.bindData(listData[position])
}
}
val adapter = ListItemsAdapter(layoutInflater)
```
With SolidAdapter:
```kotlin
class MoodViewProvider(
layoutInflater: LayoutInflater
) : InflatedViewProvider(layoutInflater, R.layout.item_mood)
class MoodViewHolder(
override val containerView: View
) : RecyclerView.ViewHolder(containerView), LayoutContainer {
val iconView: ImageView = layoutIconView
val titleView: TextView = layoutTitleView
}
class MoodViewBinder(
private val context: Context
) : SimpleViewBinder() {
override fun bindView(viewHolder: MoodViewHolder, data: MoodUiModel) {
viewHolder.iconView.setImageDrawable(
AppCompatResources.getDrawable(context, data.iconResourceId)
)
viewHolder.indexView.text = data.title
}
}
val adapter = SolidAdapter(
MoodViewProvider(layoutInflater),
{ view, _ -> MoodViewHolder(view) },
MoodViewBinder(this)
)
```
## Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
## License
[MIT](https://choosealicense.com/licenses/mit/)