BottomSheet

 

 

 

 

dependency

 

implementation 'com.google.android.material:material:1.3.0-alpha02'

 

 

 

BottomSheetDialog

 

 

기존의 다이얼로그 사용법과 동일하다.

 

        BottomSheetDialog(this).apply {
            val view = layoutInflater.inflate(R.layout.view_bottom_sheet, null)
            view.btn_view_bottom_sheet.setOnClickListener {
                Toast.makeText(this@MainActivity, "FIN", Toast.LENGTH_SHORT).show()
                dismiss()
            }
            setContentView(view)
        }.show()

 

 

 

 

 

 

BottomSheet With Behavior

 

 

 

activity_main.xml

 

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
 
    <!--  Content  -->
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="50dp">
 
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello, World!"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent" />
 
    </androidx.constraintlayout.widget.ConstraintLayout>
 
    <!--  BottomSheet  -->
    <LinearLayout
        android:id="@+id/ll_main_bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="#66A9EC"
        app:behavior_hideable="true"
        app:behavior_peekHeight="50dp"
        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
 
        <TextView
            android:id="@+id/tv_main_bottom_sheet_title"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:gravity="center"
            android:text="TODO List"
            android:textSize="20dp"
            android:textColor="@android:color/black"
            android:textStyle="bold"/>
 
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rv_main_bottom_sheet"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:paddingBottom="20dp"
            android:clipToPadding="false"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>
 
    </LinearLayout>
 
</androidx.coordinatorlayout.widget.CoordinatorLayout>

 

 

behavior_hideable : 완전하게 숨길 수 있을지 없을지를 정한다.

behavior_peekHeight : 최소 높이를 정한다.

layout_behavior : 행동을 정한다. 물론 BottomSheet을 만들기 위해서이기 때문이니

  com.google.android.material.bottomsheet.BottomSheetBehavior로 값을 넣어준다.

 

 

 

 

 

 

MainActivity.kt

 

class MainActivity : AppCompatActivity() {
 
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
 
        initViews()
    }
 
    private fun initViews() {
        rv_main_bottom_sheet.adapter = TodoRecyclerAdapter {
            Toast.makeText(this, "$it clicked", Toast.LENGTH_SHORT).show()
            hideBottomSheet()
        }.apply {
            updateDataSet(sample)
        }
 
        tv_main_bottom_sheet_title.setOnClickListener {
            showBottomSheet()
        }
    }
 
    private fun showBottomSheet() {
        BottomSheetBehavior.from(ll_main_bottom_sheet).let {
            if (it.state != BottomSheetBehavior.STATE_EXPANDED) {
                it.state = BottomSheetBehavior.STATE_EXPANDED
            }
        }
    }
 
    private fun hideBottomSheet() {
        BottomSheetBehavior.from(ll_main_bottom_sheet).let {
            if (it.state != BottomSheetBehavior.STATE_COLLAPSED) {
                it.state = BottomSheetBehavior.STATE_COLLAPSED
            }
        }
    }
 
    private val sample = IntRange(0, 20).map { "Job $it" }.toList()
 
}

 

 

기본적으로 드래그 액션을 통해서 BottomSheet을 제어할 수 있지만

코드를 통해서 특정상황에 확장하거나 줄일 수 있다.