First of all , Thank you for this awesome library (helps me a lot meeting my requirement in project) , But having one road block explained below -

I am having two RecylerViews in Two Different Fragments inside a same Activity .

Activity -> Fragment1 -> RecyclerView1 -> add ZoomHelper to recyclerview1's item .

Click on bottom Tab and navigate to other fragment (fragment2 is over fragment1).

Activity -> Fragment2 -> Recyclerview2 -> add ZoomHelper to recyclerview2 item

now when zooming recyclerview2's item , i am getting preview of (recyclerview1's item) , if older view is just below new item .

can you please help me with this .

its a requirement .

let me know if you need any further information .

When using zoom helper in activity with multiple fragment , when navigating to new fragment to same activity , it holds instance of previous fragments view , ZooomHelper.release() not working

Hi! First of all, thank you very much for this library. I attach the report of a crash produced by this library, I think it can be useful for me and more people.

Android 9 Redmi 5 Plus

Fatal Exception: java.lang.NullPointerException at com.aghajari.zoomhelper.ZoomHelper$dismissDialogAndViews$1.run(ZoomHelper.kt:351) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:201) at android.app.ActivityThread.main(ActivityThread.java:6810) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)

If you could help me to solve this I would appreciate it, thanks

in ZoomHelper class -> line number 205 and 351 I am getting crashes.

I am using this on recyclerview and adding and removing it at view attach and detach.

on both the lines -> onPostDelay() is used and the View may have already been destroyed and there is no null check for view inside the postdelay function.

Can you please check the issue.

Fatal Exception: java.lang.NullPointerException at com.aghajari.zoomhelper.ZoomHelper$load$1.run(ZoomHelper.java:205) at -$$LambdaGroup$js$xzCUdXiP0Q4TFHhL_Vv-FNKpLyA.run(-.java:3) at android.os.Handler.handleCallback(Handler.java:907) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:216) at android.app.ActivityThread.main(ActivityThread.java:7625) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)

In your RecyclerViewActivity, rv_item is designed with LinearLayout, if you convert them into constraint then pinch to zoom getting flickering even also not working in nested scroll view with constraint layout parent that means this zooming not working with parent constraint.

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.appcompat.widget.AppCompatImageView
            android:id="@+id/avatar"
            android:layout_width="44dp"
            android:layout_height="44dp"
            android:layout_marginHorizontal="16dp"
            android:layout_marginVertical="12dp" />

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:textColor="@android:color/black"
            android:textSize="18dp"
            android:textStyle="bold" />

    </LinearLayout>

    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout2" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/image" />
</androidx.constraintlayout.widget.ConstraintLayout>

Solution have to cover with another layout, but this solution is not a prominent solution.

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.appcompat.widget.AppCompatImageView
            android:id="@+id/avatar"
            android:layout_width="44dp"
            android:layout_height="44dp"
            android:layout_marginHorizontal="16dp"
            android:layout_marginVertical="12dp" />

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:textColor="@android:color/black"
            android:textSize="18dp"
            android:textStyle="bold" />

    </LinearLayout>

    <!--    Cover with another layout to work as expected-->
    <LinearLayout
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout2">

        <androidx.appcompat.widget.AppCompatImageView
            android:id="@+id/image"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <!--    End-->
    
    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/content" />
</androidx.constraintlayout.widget.ConstraintLayout>

when i used my AS i get problem that cant find the file and the location is build.gradle artifact.load(new FileInputStream("deploy.settings"))

In ZoomHelper.kt the zoomableView reference is cleared in onDismissDialog, however the zoomableViewParent reference is never cleared, so it still exists after the Fragment is destroyed. This field should be set to null after the placeholder is swapped out with the original view.

Hello, I am trying to add in my Adapter the following code:

@Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        return ZoomHelper.Companion.getInstance().dispatchTouchEvent(ev,this) || super.dispatchTouchEvent(ev);
    }

But the problem is that it shows up this problem: How can I solve the problem and also add @NonNull ViewHolder holder as it is in the onBindViewHolder of my adapter?

hello aghajari

I have a question I'm using five "fragments" for one "activity" in my app. One "fragment" is again using two "fragments". This "fragment" has two "fragments" doing "show/hide", not "attach" depending on the button.

In issue #4

return supportFragmentManager.findFragmentById(R.id.container)?.view?.let {
             ZoomHelper.getInstance().dispatchTouchEvent(ev!!, it)
           }!! || super.dispatchTouchEvent(ev)

You advised this code, it works very well when "fragment" is attached or detached However, after attaching another fragment from the existing "fragment", if you detach the fragment and show "fragment", the displayed "fragment" does not zoom.

What should I do in this case?

I was trying to use the library on Androidx dialog fragment to pinch and zoom images from the view pager, recycler view, but it is not working with it.

thanks for you lib, now i meet a new question, our app need a scale mode than relases hands, the dialog should be scale in the window, i get it, but when i hands touch down, the view move a little just like a shake, the experience is not kind, so,if you can give me some support

if you are chinese

你好，这个库能否实现松开后当前屏幕再次操作双指缩放，单手指移动，我修改了您的库，也实现了上面的功能，但是手指再次放下去的时候 ，图片会移动，这样不太友好，能否给我提供一下帮助