In this article, we will learn about how to add Modal Bottom Sheet in our app. We have seen this UI component in daily applications like Google Drive, Maps, or Music Player App. The modal Bottom sheet always appears from the bottom of the screen and if the user clicks on the outside content then it is dismissed. It can be dragged vertically and can be dismissed by sliding it down.
Approach:
Add the support Library in build.gradle file and add dependency in the dependencies section. With the help of this library we can inherit the BottomSheetDialogFragment which helps us to implement Bottom Sheet component.
XML
dependencies { implementation 'com.google.android.material:material:1.2.0-alpha02' } |
Now create a bottom_sheet_layout.xml file and add the following code. Here we design the layout of our Modal Bottom sheet. It has a textview and two buttons.
bottom_sheet_layout.xml
Now create BottomSheetDialog.java and add the following code.This file extends the BottomSheetFragment and thats why it act as a fragment. When the user clicks on any bottom of modal sheet the onClickListener() gets invoked.
BottomSheetDialog.java
Kotlin
//code by rony sarkarpackage org.neveropen.gfgmodalsheetimport android.os.Bundleimport android.view.LayoutInflaterimport android.view.Viewimport android.view.ViewGroupimport android.widget.Buttonimport android.widget.Toastimport com.google.android.material.bottomsheet.BottomSheetDialogFragmentclass BottomSheetDialog : BottomSheetDialogFragment() { override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { val view = inflater.inflate(R.layout.bottom_sheet_layout, container, false) val algoButton = view.findViewById<Button>(R.id.algo_button) val courseButton = view.findViewById<Button>(R.id.course_button) algoButton.setOnClickListener { Toast.makeText(activity, "Algorithm Shared", Toast.LENGTH_SHORT).show() dismiss() } courseButton.setOnClickListener { Toast.makeText(activity, "Course Shared", Toast.LENGTH_SHORT).show() dismiss() } return view }} |
Add the following code in activity_main.xml file. Here we add a button on activity_main layout.
activity_main.java
Add the following code in the MainActivity.java file. Here an onClickListener is attached with the button. If the user clicks on it, it gets invoked and bottom sheet dialog displays to user.
MainActivity.java
Kotlin
//code by rony sarkarpackage org.neveropen.gfgmodalsheetimport androidx.appcompat.app.AppCompatActivityimport android.os.Bundleimport android.view.Viewimport android.widget.Buttonclass MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val openBottomSheet = findViewById<Button>(R.id.open_bottom_sheet) openBottomSheet.setOnClickListener { val bottomSheet = BottomSheetDialog() bottomSheet.show(supportFragmentManager, "ModalBottomSheet") } }} |
Output:
