Failed to resolve: com.github.TechIsFun:AndroidTopSheet:Tag
Show in Project Structure dialog
Affected Modules: app

Even though I added:

allprojects {
    repositories {
        mavenCentral()
        google()
        jcenter()
        maven { url 'https://jitpack.io' }
    }
}

I am suspecting it has something to do with: Plugin with id 'com.github.dcendents.android-maven' not found.

I'm currently using the BottomSheetBehavior within my layout by using the following code:

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:behavior_hideable="false"
        app:behavior_peekHeight="35dp"
        app:layout_behavior="android.support.design.widget.BottomSheetBehavior">
</RelativeLayout>

I'd love that by replacing the app:layout_behavior parameter value with com.my.app.components.TopSheetBehavior will work out of the box, as it does with the BottomSheetBehavior.

Am I missing anything? At the moment I'm getting a NullPointerException, with the following trace:

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.walkaholic.hikeapp.debug, PID: 20213
                  java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.widget.ViewDragHelper.processTouchEvent(android.view.MotionEvent)' on a null object reference
                      at com.walkaholic.hikeapp.components.TopSheetBehavior.onTouchEvent(TopSheetBehavior.java:285)
                      at android.support.design.widget.CoordinatorLayout.resetTouchBehaviors(CoordinatorLayout.java:396)
                      at android.support.design.widget.CoordinatorLayout.onAttachedToWindow(CoordinatorLayout.java:238)
                      at android.view.View.dispatchAttachedToWindow(View.java:16638)
                      at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3149)
                      at android.view.ViewGroup.addViewInner(ViewGroup.java:4695)
                      at android.view.ViewGroup.addView(ViewGroup.java:4497)
                      at android.view.ViewGroup.addView(ViewGroup.java:4437)
                      at android.view.ViewGroup.addView(ViewGroup.java:4410)
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1434)
                      at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1759)
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1827)
                      at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797)
                      at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2596)
                      at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2383)
                      at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2338)
                      at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2245)
                      at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:703)
                      at android.os.Handler.handleCallback(Handler.java:751)
                      at android.os.Handler.dispatchMessage(Handler.java:95)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6682)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

Steps to reproduce:

1. Use app:behavior_peekHeight="3dp" in activity_main.xml of sample project
2. Open top sheet
3. Swipe up to close top sheet

Actual: Top sheet is fully closed

Expected Top sheet is still visible with a height of 3dp.

This PR contains changes that replace android.support library to androidx library.

Android support library is still available, but Google recommends to use AndroidX library instead of support library. Especially, they noted that all new library development will occur in the AndroidX library. (Check this Link)

So I think it would be better to use AndroidX library instead of support library.

What I change includes:

androidx libraries instead of android.support libraries.

• appcompat = 'androidx.appcompat:appcompat:1.1.0' instead of appcompat = 'com.android.support:appcompat-v7:24.1.1'
• annotation = "androidx.annotation:annotation:1.1.0"
• design = 'com.google.android.material:material:1.0.0' instead of design = 'com.android.support:design:24.1.1'

compileSdkVersion, targetSdkVersion, buildToolsVersion, and gradle version.

• compileSdkVersion = 29 (previously compileSdkVersion = 24)
• targetSdkVersion = 24 (previously targetSdkVersion = 24)
• buildToolsVersion = "29.0.0" (previously buildToolsVersion = "23.0.2")
• classpath 'com.android.tools.build:gradle:3.5.2' (previously classpath 'com.android.tools.build:gradle:2.1.3')

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Detected Package Files

• .github/workflows/android.yml (github-actions)
• gradle.properties (gradle)
• settings.gradle (gradle)
• build.gradle (gradle)
• app/build.gradle (gradle)
• library/build.gradle (gradle)
• gradle/wrapper/gradle-wrapper.properties (gradle-wrapper)

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I am trying to use the "TopSheetBehavior" with NestedScrollView.

if i replace NestedScrollView with LinearLayout, everything work fine. But if i use NestedScrollView, the "FrameLayout (i.e. top Sheet)" cannot be collapsed.

Just more understanding: I have NestedScrollView | |----->NestedScrollView has TabLayout. | |------> Tablayout has Fragment | |------> Fragment has this "Top Sheet"

Could you please help... :-)