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Android's ImageView pinch-to-zoom made easy

License: MIT License

Java 100.00%

android-library android-app android imageview pinch-to-zoom

pinchtozoom's Introduction

PinchToZoom

Android's ImageView pinch-to-zoom made easy

Sample app

Get it

Add this line to your build.gradle's dependencies:

compile 'com.bogdwellers:pinchtozoom:0.1'

Overview

PinchToZoom for Android is a simple yet feature complete library for adding pinch-to-zoom functionality to an ImageView. It has sleek easing animations that make it stand out in quality and ease of use.

Features

Pinch-to-zoom
Double-tap to quickly zoom-in and out
Drag while zoomed in
Animated drag & zoom release easing
Does not extend the ImageView class so is usable with custom ImageView implementations
Fully customizable

Integrate

Adding pinch-to-zoom functionality to your ImageView is easy as this:

ImageView imageView = (ImageView) view.findViewById(R.id.image);
imageView.setOnTouchListener(new ImageMatrixTouchHandler(view.getContext()));

Customization

The ImageMatrixTouchHandler class has multiple getter/setter methods that allow for changing the behavior and animation settings.

Javadoc

Consult the Javadoc at https://martinwithaar.github.io/PinchToZoom/

pinchtozoom's People

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pinchtozoom's Issues

Not able to Reset Zoom after zoom In

When i double Click on ImageView It's Zoom In after that not able to Zoom Out .

Can i zoom out?

Can i somehow customize this library to support zoom out indefinitely? right now you can't zoom out to make the image smaller

[Request] Can you make it ViewPager friendly for horizontal swipe

Hey, thanks for the lib. It's realy easy to implement!
I've found that horizontal swiping intercepts by ViewPager. To translate I need to hold vertical swipe, then to horizontal.
Thanks, again!

Not working onClickListener

I tried to detect onClick event on imageView, but it is not working.
How can I fix this issue?

Here is my code.

ImageMatrixTouchHandler imageMatrixTouchHandler = new ImageMatrixTouchHandler(imageView.getContext());
imageView.setOnTouchListener(imageMatrixTouchHandler);

    imageView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            //do something
        }
    });

How to reset zoom?

I can't figure out how to reset the zoom level. I am using one ImageView, into which I am loading one image at a time (from a thumbnail) for zooming with. However, if I open one, zoom in a bit, close it (hiding the imageview), then open another image, it shows up at the same zoom level as the one before it.

I tried setting a new ImageMatrixTouchHandler on the zoomed in ImageView every time I load in a new pic, but that didn't help.

I also tried making a "standalone" ImageMatrixTouchHandler ahead of setting it on the ImageView, with the thought that I could try myImageMatrixTouchHandler.animateZoom(0, 0) but I get a
Attempt to invoke virtual method 'void android.graphics.Matrix.getValues(float[])' on a null object reference

Logo Proposal

Hello,

I came across your project and i wanted to help contribute to your amazing project...
I created a logo for you... Two different styles based on the same idea concept for you to choose the best you like and use...
If you find any of the styles good enough and you like it, please do let me know.

The link contains the google drive files for your use.
https://drive.google.com/drive/folders/1R8o3wewgGQZvuWDum6rOIXm2fwlxqkp7?usp=sharing

doesn't work inside of a scrollview

is there a fix for this? it might be because of conflicting onTouchListeners. Maybe it's possible that if you pass a reference of the scrollview to your library, you could handle it there?

detecting longpress

Is there a better way than below code? I am trying to find out the position(X, Y) of selected text on a zoomed image.

ImageMatrixTouchHandler imageMatrixTouchHandler = new ImageMatrixTouchHandler(layout.getContext()){
                @Override
                public boolean onTouch(View view, MotionEvent event) {
                    Log.d(TAG, "onTouch: ");
                    super.onTouch(view, event);
                    Log.d(TAG, "onTouch: super");
                    final GestureDetector gestureDetector = new GestureDetector(ViewImageActivity.this, new GestureDetector.SimpleOnGestureListener() {
                        public void onLongPress(MotionEvent e) {
                            Log.e(TAG, "Longpress detected event "+event.getAction()+" e "+e.getAction());
                            if(event.getAction() == 0){
                                Log.d(TAG, "onLongPress: real detected X: "+e.getX()+" Y: "+e.getY()+" event X: "+event.getX()+" Y: "+event.getY()+" raw Y"+event.getRawY());
                                Toast.makeText(getApplicationContext(), "Long Clicked " , Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                    gestureDetector.onTouchEvent(event);
                    return true; // indicate event was handled
                }
            };
            ivImage.setOnTouchListener(imageMatrixTouchHandler);

Not able to navigate a zoomed image. Swiping takes to second image instead of showing the section of zoomed image

I am not able to navigate a zoomed image. Swiping takes to second image instead of showing the section of the zoomed image.
Bug explained in this video at https://www.youtube.com/watch?v=_9XjgVCqIOg&t=300

Note that I should also be able to listen to longclick on a zoomed image. Currently I am able to detect longpress using GestureDetector as shown here https://github.com/onedrupal/One-Drupal-Android/blob/master/app/src/main/java/com/technikh/onedrupal/activities/ViewImageActivity.java#L188

Also I am not able to send the zoomed section to OCR detection(Google firebase ML Kit). I am only able to send the full image at https://github.com/onedrupal/One-Drupal-Android/blob/master/app/src/main/java/com/technikh/onedrupal/activities/ViewImageActivity.java#L240

How to init ImageMatrixTouchHandler like centerCrop

How to init ImageMatrixTouchHandler like centerCrop？

Fatal Exception: java.lang.NullPointerException

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.drawable.Drawable.getIntrinsicWidth()' on a null object reference
       at com.bogdwellers.pinchtozoom.ImageMatrixCorrector.getInnerFitScale(ImageMatrixCorrector.java:62)
       at com.bogdwellers.pinchtozoom.ImageMatrixTouchHandler$ImageGestureListener.onDoubleTapEvent(ImageMatrixTouchHandler.java:430)
       at android.view.GestureDetector.onTouchEvent(GestureDetector.java:525)
       at com.bogdwellers.pinchtozoom.ImageMatrixTouchHandler.onTouch(ImageMatrixTouchHandler.java:326)
       at android.view.View.dispatchTouchEvent(View.java:8582)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2530)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2110)
       at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2538)
       at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1811)
       at android.app.Activity.dispatchTouchEvent(Activity.java:2820)
       at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:68)
       at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2476)
       at android.view.View.dispatchPointerEvent(View.java:8799)
       at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4729)
       at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4551)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4047)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4106)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4066)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4209)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4074)
       at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4266)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4047)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4106)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4066)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4074)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4047)
       at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6530)
       at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6504)
       at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6457)
       at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6689)
       at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:218)
       at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
       at android.os.MessageQueue.next(MessageQueue.java:148)
       at android.os.Looper.loop(Looper.java:168)
       at android.app.ActivityThread.main(ActivityThread.java:5657)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:990)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:785)

Unable to resolve dependency ?

I'm using Android studio 3.0 beta & target SDK - 26. It is Unable to resolve dependency after Gradle Sync ?

Nothing happens

I have integrated the library as in the description and it does not work, unfortunately.

How to reset scaling to the original?

Hi! Thanks for the great library.

There is one problem.

I do imgViev.setImageBitmap(bitmap)
Enlarge the image, but do not reduce it.
Upload the next image in imgView
It is immediately on an enlarged scale, and I want it to be in the original. How to finish this?

Thank you!

P.S. I found a solution!

        try {
            imageMatrixTouchHandler.animateZoom(0, 0);
        } catch (Exception ignore) {
        }

try/catch need, because there may be an exception

W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Matrix.getValues(float[])' on a null object reference
at com.bogdwellers.pinchtozoom.MatrixCorrector.getValues(MatrixCorrector.java:96)

Custom onClick

Is there a way for us to use our own custom onclick event?

Not working

The image functionality only works inside the imageview, not for the imageview component, ie, only work for the resource inside, the beer

How to disable the screen edges block

Hi there, When I zoom an image into its original size, then I cannot drag it around, I have to zoom it out until it gets bigger than the screen's width, then I can move it, otherwise I can only zoom in an out and the image stays in the center of my relative layout.
How can I disable this block? (Hope my question is clear :)