Pinch-to-zoom with multi-touch gestures In Android
Published in
3 min readFeb 2, 2018
In this article, we will demonstrate multi-touch with the common pinch-to-zoom gesture using the SimpleOnScaleGestureListener class. The aim is to give you a head start if you intend to add pinch-to-zoom feature in your project.
The following screen-shot shows the icon zoomed in and out using the application created :
Okay, Let’s get started!.
- Create a new project in Android Studio and call it: Pinch2Zoom or whatever you like. Use the default Phone & Tablet options and select Empty Activity when prompted for the Activity Type.
- We’ll use an ImageView with the application icon to provide a visual indication of the pinch-to-zoom. Open activity_main.xml and Replace the existing TextView with the following ImageView :
<ImageViewandroid:id="@+id/imageView"android:layout_width="wrap_content"android:layout_height="wrap_content"