diff --git a/tedimagepicker/src/main/java/gun0912/tedimagepicker/TedImagePickerActivity.kt b/tedimagepicker/src/main/java/gun0912/tedimagepicker/TedImagePickerActivity.kt
index a2a0b04..3134f13 100644
--- a/tedimagepicker/src/main/java/gun0912/tedimagepicker/TedImagePickerActivity.kt
+++ b/tedimagepicker/src/main/java/gun0912/tedimagepicker/TedImagePickerActivity.kt
@@ -48,7 +48,7 @@ import java.util.concurrent.TimeUnit
 import kotlin.collections.ArrayList
 
 
-internal class TedImagePickerActivity : AppCompatActivity() {
+open class TedImagePickerActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityTedImagePickerBinding
     private val albumAdapter by lazy { AlbumAdapter(builder) }
@@ -268,7 +268,7 @@ internal class TedImagePickerActivity : AppCompatActivity() {
     }
 
     @SuppressLint("CheckResult")
-    private fun onCameraTileClick() {
+    open fun onCameraTileClick() {
         val (cameraIntent, uri) = MediaUtil.getMediaIntentUri(
             this@TedImagePickerActivity,
             builder.mediaType,
diff --git a/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedImagePickerBaseBuilder.kt b/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedImagePickerBaseBuilder.kt
index 8ecddad..360443a 100644
--- a/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedImagePickerBaseBuilder.kt
+++ b/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedImagePickerBaseBuilder.kt
@@ -106,8 +106,12 @@ open class TedImagePickerBaseBuilder<out B : TedImagePickerBaseBuilder<B>>(
         .setPermissions(Manifest.permission.READ_EXTERNAL_STORAGE)
         .request()
 
+    private open fun getIntent(context: Context): Intent {
+        // allow to use a custom activity intent
+        return TedImagePickerActivity.getIntent(context, this)
+    }
     private fun startActivity(context: Context) {
-        TedImagePickerActivity.getIntent(context, this)
+        getIntent(context, this)
             .run {
                 TedRxOnActivityResult.with(context).startActivityForResult(this)
             }.run {
diff --git a/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedRxImagePicker.kt b/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedRxImagePicker.kt
index 3876d90..ce8f9f0 100644
--- a/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedRxImagePicker.kt
+++ b/tedimagepicker/src/main/java/gun0912/tedimagepicker/builder/TedRxImagePicker.kt
@@ -19,7 +19,7 @@ class TedRxImagePicker {
     }
 
     @SuppressLint("ParcelCreator")
-    class Builder(private val contextWeakReference: WeakReference<Context>) :
+    open class Builder(private val contextWeakReference: WeakReference<Context>) :
         TedImagePickerBaseBuilder<Builder>() {
 
         fun start(): Single<Uri> =