How I can implement zoom in Fresco Library?

Question

I'm using Fresco to visualize images from the assets folder in a view. My problem is that by default the class com.facebook.drawee.view.SimpleDraweeView doesn't have a zoom/pinch method. Is there any property or something in the XML to enable this, or which is the way to achieve it?

Answer 1

this is Fresco ZoomableDraweeView

ZoomableDraweeView

To see how to use please take a look at this:

ZoomableDraweeView-sample

Hope it help you!

Answer 2

PhotoDraweeView enables double tap and pinch zoom (similar to the PhotoView library) to the Fresco library.

Add the photodraweeview dependency in the app gradle:

dependencies {
implementation 'com.facebook.fresco:fresco:1.9.0'
implementation 'me.relex:photodraweeview:1.1.3'
}

replace the XML code:

<com.facebook.drawee.view.SimpleDraweeView
    android:id="@+id/my_image_view"
    android:layout_width="130dp"
    android:layout_height="130dp"
    fresco:placeholderImage="@drawable/my_drawable"/>

with

<me.relex.photodraweeview.PhotoDraweeView
    android:id="@+id/my_image_view"
    android:layout_width="130dp"
    android:layout_height="130dp"
    app:placeholderImage="@drawable/my_drawable"/>

In the java code onCreate() set the url:

PhotoDraweeView mPhotoDraweeView = findViewById(R.id.my_image_view);
mPhotoDraweeView.setPhotoUri(Uri.parse("http://your.image.url"));

Answer 3

The fresco's ZoomableDraweeView sample added some new features such as double-tap to zoom and enable scrolling in ViewPager when the ZoomableDraweeView zooms in. I've wrote a demo for this sample in which I've also optimized some default behaviors to make it more perfect.

Please refer to: https://github.com/ibosong/CommentGallery

Answer 4

You can use ZoomableDraweeView for pinch-to-zoom feature