How to Capture Screenshot of a View and Save it to Gallery in Android?
In this article, we will capture a screenshot of a view and store the image in the gallery. A sample video is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Kotlin language.
Step by Step Implementation
Step 1: Create a new project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Kotlin as the programming language
Step 2: Working with the activity_main.xml file
Go to the activity_main.xml file and refer to the following code. Below is the code for the activity_main.xml file. Notice that it has a Material Card View with id card_View, we will take a screenshot of this view in this article.
XML
<? xml version = "1.0" encoding = "utf-8" ?> < androidx.constraintlayout.widget.ConstraintLayout 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:id = "@+id/parentLayout" android:layout_width = "match_parent" android:layout_height = "match_parent" android:gravity = "center" tools:context = ".MainActivity" > < com.google.android.material.card.MaterialCardView android:id = "@+id/card_View" android:layout_width = "match_parent" android:layout_height = "300dp" android:layout_margin = "20dp" android:elevation = "10dp" app:cardBackgroundColor = "@color/black" app:layout_constraintLeft_toLeftOf = "parent" app:layout_constraintRight_toRightOf = "parent" app:layout_constraintTop_toTopOf = "parent" > < LinearLayout android:layout_width = "match_parent" android:layout_height = "match_parent" android:orientation = "vertical" > < ImageView android:layout_width = "match_parent" android:layout_height = "200dp" android:scaleType = "center" android:src = "@drawable/gfg" /> < TextView android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_gravity = "center" android:layout_marginTop = "20dp" android:text = "Beginner For Beginner" android:textColor = "@color/white" android:textSize = "20sp" android:textStyle = "bold" /> </ LinearLayout > </ com.google.android.material.card.MaterialCardView > < Button android:id = "@+id/btn_capture" android:layout_width = "wrap_content" android:layout_height = "50dp" android:layout_marginTop = "20dp" android:backgroundTint = "#0F9D58" android:text = "Capture View" app:layout_constraintLeft_toLeftOf = "parent" app:layout_constraintRight_toRightOf = "parent" app:layout_constraintTop_toBottomOf = "@id/card_View" /> </ androidx.constraintlayout.widget.ConstraintLayout > |
Step 3. Add permission in the manifest.
Go to the AndroidManifest.xml file and the following code. It has two permissions Read and Write to external storage. and inside application tag it has android:usesCleartextTraffic=”true”.
XML
<? xml version = "1.0" encoding = "utf-8" ?> < manifest xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" package = "com.w3wiki.captureview" > < uses-permission android:name = "android.permission.READ_EXTERNAL_STORAGE" /> < uses-permission android:name = "android.permission.WRITE_EXTERNAL_STORAGE" tools:ignore = "ScopedStorage" /> < application android:allowBackup = "true" android:icon = "@mipmap/ic_launcher" android:label = "@string/app_name" android:roundIcon = "@mipmap/ic_launcher_round" android:supportsRtl = "true" android:theme = "@style/Theme.CaptureView" android:usesCleartextTraffic = "true" > < activity android:name = ".MainActivity" > < intent-filter > < action android:name = "android.intent.action.MAIN" /> < category android:name = "android.intent.category.LAUNCHER" /> </ intent-filter > </ activity > </ application > </ manifest > |
Step 4: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
Kotlin
import android.Manifest import android.content.ContentValues import android.graphics.Bitmap import android.graphics.Canvas import android.net.Uri import android.os.Build import android.os.Bundle import android.os.Environment import android.provider.MediaStore import android.util.Log import android.view.View import android.widget.Button import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import androidx.cardview.widget.CardView import androidx.core.app.ActivityCompat import java.io.File import java.io.FileOutputStream import java.io.OutputStream class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContentView(R.layout.activity_main) // write permission to access the storage ActivityCompat.requestPermissions( this , arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), 1 ) ActivityCompat.requestPermissions( this , arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE), 1 ) // this is the card view whose screenshot // we will take in this article // get the view using fin view bt id val cardView = findViewById<CardView>(R.id.card_View) // on click of this button it will capture // screenshot and save into gallery val captureButton = findViewById<Button>(R.id.btn_capture) captureButton.setOnClickListener { // get the bitmap of the view using // getScreenShotFromView method it is // implemented below val bitmap = getScreenShotFromView(cardView) // if bitmap is not null then // save it to gallery if (bitmap != null ) { saveMediaToStorage(bitmap) } } } private fun getScreenShotFromView(v: View): Bitmap? { // create a bitmap object var screenshot: Bitmap? = null try { // inflate screenshot object // with Bitmap.createBitmap it // requires three parameters // width and height of the view and // the background color screenshot = Bitmap.createBitmap(v.measuredWidth, v.measuredHeight, Bitmap.Config.ARGB_8888) // Now draw this bitmap on a canvas val canvas = Canvas(screenshot) v.draw(canvas) } catch (e: Exception) { Log.e( "GFG" , "Failed to capture screenshot because:" + e.message) } // return the bitmap return screenshot } // this method saves the image to gallery private fun saveMediaToStorage(bitmap: Bitmap) { // Generating a file name val filename = "${System.currentTimeMillis()}.jpg" // Output stream var fos: OutputStream? = null // For devices running android >= Q if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { // getting the contentResolver this .contentResolver?.also { resolver -> // Content resolver will process the contentvalues val contentValues = ContentValues().apply { // putting file information in content values put(MediaStore.MediaColumns.DISPLAY_NAME, filename) put(MediaStore.MediaColumns.MIME_TYPE, "image/jpg" ) put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_PICTURES) } // Inserting the contentValues to // contentResolver and getting the Uri val imageUri: Uri? = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues) // Opening an outputstream with the Uri that we got fos = imageUri?.let { resolver.openOutputStream(it) } } } else { // These for devices running on android < Q val imagesDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) val image = File(imagesDir, filename) fos = FileOutputStream(image) } fos?.use { // Finally writing the bitmap to the output stream that we opened bitmap.compress(Bitmap.CompressFormat.JPEG, 100 , it) Toast.makeText( this , "Captured View and saved to Gallery" , Toast.LENGTH_SHORT).show() } } } |
Output:
Github repo here
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