Android sharing with image preview

file_paths.xml

<paths>
    <cache-path
        name="shared_images"
        path="images/" />
</paths>

Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="appPackage">

    <application
        android:name=".app.App"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:networkSecurityConfig="@xml/network_security_config"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:theme="@style/AppTheme">
        <activity
            android:name=".ui.MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.Launcher"
            android:windowSoftInputMode="adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>


        <provider
            android:authorities="appPackage.fileprovider"
            android:name="androidx.core.content.FileProvider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>


    </application>

</manifest>

SharingExtensions.kt

fun Context.shareWithImagePreview(text: String, previewTitle: String) {
    val sharingIntent = Intent(Intent.ACTION_SEND)
    sharingIntent.type = "text/plain"
    sharingIntent.putExtra(Intent.EXTRA_TEXT, text)
    sharingIntent.putExtra(Intent.EXTRA_TITLE, previewTitle)

    val previewImageClipData: ClipData? = getClipDataThumbnail(this)
    previewImageClipData?.let {
        sharingIntent.clipData = it
        sharingIntent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
    }

    startActivity(Intent.createChooser(sharingIntent, null))
}

private fun getClipDataThumbnail(context: Context): ClipData? {
    return try {
        val contentUri = saveThumbnailImage(context)
        ClipData.newUri(context.contentResolver, null, contentUri)
    } catch (e: FileNotFoundException) {
        Timber.e(e.localizedMessage ?: "getClipDataThumbnail FileNotFoundException")
        null
    } catch (e: IOException) {
        Timber.e(e.localizedMessage ?: "getClipDataThumbnail IOException")
        null
    }
}


fun saveThumbnailImage(context: Context): Uri? {

    // Domain authority for our app FileProvider
    val fileProviderAuthority = "appPackage.fileprovider"

    // Cache directory to store images
    // This is the same path specified in the @xml/file_paths and accessed from the AndroidManifest
    val imageCacheDir = "images"

    // Name of the file to use for the thumbnail image
    val imageFile = "thumbnail.png"

    val bm = BitmapFactory.decodeResource(context.resources, R.drawable.any_icon)
    val cachePath = File(context.applicationContext.cacheDir, imageCacheDir)
    cachePath.mkdirs()
    val stream = FileOutputStream("$cachePath/$imageFile")
    bm.compress(Bitmap.CompressFormat.PNG, 100, stream)
    stream.close()
    val imagePath = File(context.cacheDir, imageCacheDir)
    val newFile = File(imagePath, imageFile)
    return FileProvider.getUriForFile(context, fileProviderAuthority, newFile)
}