What is PersistBottomSheetFragment?

• When you use the BottomSheetFragment, sometime you need persistent BottomSheetFragment
• Ex) Google Map's bottom UI
• PersistBottomSheetFragment is a BottomSheetFragment that is made to be very easy to implement.
• You only need to implement it with the UI when collapse and expanded

Google Map	Hey Dealer	Sample

Setup

Gradle

repositories {
    google()
    mavenCentral()
}

dependencies {
    implementation 'kr.co.prnd:persistBottomSheetFragment:x.y.z'
    //implementation 'kr.co.prnd:persistBottomSheetFragment:1.0.0'
}

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How to use

1.Enable databinding

• PersistBottomSheetFragmentuse databinding
• Set enable databinding in your app build.gradle

buildFeatures {
    dataBinding = true
}

2. Collase/Expand UI

• Make layout resource file for collapse/expand
• ex) layout_collapse.xml, layout_expand.xml

3. Make your PersisBottomSheetFragment

• Extend PersistBottomSheetFragment and use collapse/expand layout resource

class SamplePersistBottomFragment :
    PersistBottomSheetFragment<LayoutCollapseBinding, LayoutExpandBinding>(
        R.layout.layout_collapse,
        R.layout.layout_expand
    ) {
      //...
 }

• example

class SamplePersistBottomFragment :
    PersistBottomSheetFragment<LayoutCollapseBinding, LayoutExpandBinding>(
        R.layout.layout_collapse,
        R.layout.layout_expand
    ) {
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        collapseBinding.viewSelect.setOnClickListener {
            expand()
        }
    }
    companion object {
        private val TAG = SamplePersistBottomFragment::class.simpleName
        fun show(
            fragmentManager: FragmentManager,
            @IdRes containerViewId: Int,
        ): SamplePersistBottomFragment =
            fragmentManager.findFragmentByTag(TAG) as? SamplePersistBottomFragment
                ?: SamplePersistBottomFragment().apply {
                    fragmentManager.beginTransaction()
                        .replace(containerViewId, this, TAG)
                        .commitAllowingStateLoss()
                }
    }
}

FAQ

- I want access collapse/expand ui

• You can anytime access collapse/expand ui using collapseBinding, expandBinding

collapseBinding.viewSelect.setOnClickListener {
    // ..
}

- I want cusomize BottomSheetBehavior

• you can use bottomSheetBehavior variable

- I want handle back key event

• handleBackKeyEvent() support back key event

 override fun onBackPressed() {
     if (samplePersistBottomFragment?.handleBackKeyEvent() == true) {
         // no-op
     } else {
         super.onBackPressed()
     }
 }

License

Copyright 2021 PRNDcompany

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.