Gallery-Image-Picker

Android library for picking images.

Features

• You can use any image loading library for previews (Glide, Picasso, Coil etc.)
• Permission processing
• Returns name and Uri for picked images
• UI customizations
• Filtering by mime types and folders

Add library to a project

Add the mavenCentral repository in root build.gradle:

allprojects {
    repositories {
        mavenCentral()
    }
}

Add the following dependency in app build.gradle:

dependencies {
    implementation 'io.github.samuel-unknown:gallery-image-picker:1.6.1'
    
    // if you want to use default Glide implementation for ImageLoaderFactory
    implementation 'io.github.samuel-unknown:gallery-image-picker-glide:1.6.1'
    
    // if you want to use default Coil implementation for ImageLoaderFactory
    implementation 'io.github.samuel-unknown:gallery-image-picker-coil:1.6.1'
}

Usage

1. Create custom ImageLoaderFactory implementation or use default implementation (Glide or Coil) by adding dependency as said above. Glide implementation works faster.

2. Initialize library with ImageLoaderFactory implementation

   Click to expand

   // MyApplication.kt
   class MyApplication: Application(R.layout.activity_main) {
       override fun onCreate() {
           super.onCreate()
           initGalleryImagePickerLib()
       }
   
       private fun initGalleryImagePickerLib() {
           GalleryImagePicker.init(ImageLoaderFactoryGlideImpl(appContext = this))
       }
   }

   <!--AndroidManifest.xml-->
   <application
       android:name=".MyApplication"
       android:icon="@mipmap/ic_launcher"
       android:label="@string/app_name"
       android:roundIcon="@mipmap/ic_launcher_round"
       android:supportsRtl="true">
   </application>

3. Register launcher and launch it when it needed

   Click to expand

   // MyApplication.kt
   class MainActivity : AppCompatActivity(R.layout.activity_main) {
       private val getImagesLauncher = registerForActivityResult(ImagesResultContract()) { result: ImagesResultDto ->
           when (result) {
               is ImagesResultDto.Success -> {
                   result.images.forEach { imageDto ->
                       Log.d(TAG, "imageDto: $imageDto")
                    }
               }
               is ImagesResultDto.Error -> {
                   Log.d(TAG, "error: ${result.message}")
               }
           }
       }
   
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           findViewById<Button>(R.id.open_gallery_button_view).setOnClickListener {
               getImagesLauncher.launch(
                   GalleryConfigurationDto(
                       spacingSizeInPixels = 30,
                       spanCount = 4,
                       openLikeBottomSheet = true,
                       singleSelection = false,
                       peekHeightInPercents = 60
                   )
               )
           }
       }
   
       companion object {
           private val TAG = MainActivity::class.java.simpleName
       }
   }

4. Customizations

   Click to expand

   class GalleryConfigurationDto uses for customizations. There are different arguments for that:

   • @Px val spacingSizeInPixels: Int - for spacing between cells.

   • val spanCount: Int - for setting cells count.

   • val openLikeBottomSheet: Boolean - should be gallery opened like BottomSheet or in full-screen mode.

   • val singleSelection: Boolean - limits selection to one image,

   • val peekHeightInPercents: Int - for setting BottomSheet height.

   • val mimeTypes: List<String>? = null - filtering images by mimeTypes.

   • @StyleRes val themeResId: Int - for creating a custom theme.

   • val selectorSizeRatio: Float - determines the size of selector (ring and counter).

   • val selectedImageScale: Float - scale for selected images.

   • selectionAnimationDurationInMillis: Long - how fast selection animation plays.

     You can find an example of using here here

Development roadmap

Version 1.1.*

• Mime types support with config
• Handle screen orientation changes
• UI customizations

Version 1.2.*

• Add Glide and Coil implementation modules

Version 1.3.*

• Directory choosing

Version 1.4.*

• Single image selection

Version 1.5.*

• Performance improvements

Version 1.6.*

• New parameters for customization

Version 1.7.*

• Camera integration (preview and capture)

License

Copyright 2021 Samuel Unknown

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.