Now it is possible to enable-disable swiping `viewpager2` using `Version 1.0.0-alpha02`

Use **`implementation &#39;androidx.viewpager2:viewpager2:1.0.0-alpha02&#39;`**

&gt;[**Version 1.0.0**][4]

 **New features**

 - Ability to disable user input (`setUserInputEnabled`, `isUserInputEnabled`)

**API changes**

 - `ViewPager2` class final

**Bug fixes**

 - `FragmentStateAdapter` stability fixes


**SAMPLE CODE to disable swiping in viewpager2**

    myViewPager2.setUserInputEnabled(false);

**SAMPLE CODE to enable swiping in viewpager2**

    myViewPager2.setUserInputEnabled(true);

[4]: https://developer.android.com/jetpack/androidx/releases/viewpager2#version_100_3

If you are using Android Data Binding you can simply disable it your layout xml file.

    app:userInputEnabled=&quot;@{false}&quot;



    viewPager2.setUserInputEnabled(false);

Under the hood `ViewPager2` works with `RecyclerView` for inflating the fragment views, but the `RecyclerView` is hidden so they make it more idiot proof. 

     val rv : RecyclerView = viewPager.getChildAt(0) as RecyclerView
     rv.layoutManager = NonScrollingLayoutManager( rv.context, rv.layoutManager as LinearLayoutManager)
        

Hacky way is to get the child at position zero which is the `RecyclerView` and disable  scrolling in the layout manager, by wrapping the layout manager:



    inner class NonScrollingLayoutManager(context: Context, val layoutManager: LinearLayoutManager) :
        LinearLayoutManager(context, layoutManager.orientation, layoutManager.reverseLayout) {

        override fun canScrollVertically(): Boolean  = layoutManager.orientation == HORIZONTAL


        override fun canScrollHorizontally(): Boolean  =  layoutManager.orientation == VERTICAL

    }


Please beware that if the API changes the layout manager used for the RecyclerView, i.e they move away from the `LinearLayoutManager` this wont work and it will need some methods overriden and ensure super methods are called. 

Second approach is subclass the `ViewPager2` which is `ViewGroup` and then do the magic in intercepting touch events, before they are dispatched to the child views (as you would guess the `RecyclerView`) and be careful not to prevent clicks.

I&#39;ve recently come across this unusual (to me) Java syntax...here&#39;s an example of it:

    List list = new &lt;String, Long&gt;ArrayList();

Notice the positioning of the `&lt;String, Long&gt;` type arguments...it&#39;s not after the type as normal but before. I don&#39;t mind admitting I&#39;ve never seen this syntax before. Also note there are 2 type arguments when `ArrayList` only has 1.

Does the positioning of the type arguments have the same meaning as putting them after the type? If not, what does the different positioning mean?

Why is it legal to have 2 type arguments when `ArrayList` only has 1?

I&#39;ve searched the usual places, eg. Angelika Langer and on here but can&#39;t find any mention of this syntax anywhere apart from the grammar rules in the Java grammar file on the ANTLR project.

What do constructor type arguments mean when placed *before* the type?

Currently, I am implementing unit test for my project and there is a file that contained `window.location.href`.

I want to mock this to test and here is my sample code:

    it(&quot;method A should work correctly&quot;, () =&gt; {
          const url = &quot;http://dummy.com&quot;;
          Object.defineProperty(window.location, &quot;href&quot;, {
            value: url,
            writable: true
          });
          const data = {
            id: &quot;123&quot;,
            name: null
          };
          window.location.href = url;
          wrapper.vm.methodA(data);
          expect(window.location.href).toEqual(url);
        });

But I get this error:

    TypeError: Cannot redefine property: href
            at Function.defineProperty (&lt;anonymous&gt;)

I had tried some solutions but not resolve it. I need some hints to help me get out of this trouble. Plz help.

How to mock window.location.href with Jest + Vuejs?

Is it possible to enable-disable swiping in new android [`viewpager2`][1] component?


  [1]: https://developer.android.com/jetpack/androidx/releases/viewpager2

How to disable swiping in ViewPager2?

<p>Is it possible to enable-disable swiping in new android <a href="https://developer.android.com/jetpack/androidx/releases/viewpager2" target="_blank" rel="noopener noreferrer"><code>viewpager2</code></a> component?</p>


I have following code for my vector:

    &lt;vector xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:width=&quot;24dp&quot;
        android:height=&quot;24dp&quot;
    
        android:viewportWidth=&quot;314.015&quot;
        android:viewportHeight=&quot;314.015&quot;&gt;
        &lt;path
            android:fillColor=&quot;#FCD83500&quot;
            android:pathData=&quot;M157.007,0C70.291,0 0,70.289 0,157.007c0,86.712 70.29,157.007 157.007,157.007c86.709,0 157.007,-70.295 157.007,-157.007C314.014,70.289 243.716,0 157.007,0zM31.403,157.015c0,-69.373 56.228,-125.613 125.604,-125.613V282.62C87.631,282.62 31.403,226.38 31.403,157.015z&quot; /&gt;
    &lt;/vector&gt;

and Output is:

[![enter image description here][1]][1]


But I want this image in all direction as below:

[![enter image description here][2]][2] [![enter image description here][3]][3] [![enter image description here][4]][4]


  [1]: https://i.stack.imgur.com/6nLwws.png
  [2]: https://i.stack.imgur.com/WYiSrs.png
  [3]: https://i.stack.imgur.com/XQaars.png
  [4]: https://i.stack.imgur.com/t9ii0s.png

## What I have tried:

Added `&lt;vector&gt;` tag in between `&lt;rotate&gt;` but its giving me warning like **`Element vector is not allowed here`**

    &lt;rotate xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:fromDegrees=&quot;90&quot;
        android:pivotX=&quot;50%&quot;
        android:pivotY=&quot;50%&quot;
        android:toDegrees=&quot;90&quot;&gt;
    
        &lt;vector 
            android:width=&quot;24dp&quot;
            android:height=&quot;24dp&quot;
    
            android:viewportWidth=&quot;314.015&quot;
            android:viewportHeight=&quot;314.015&quot;&gt;
            &lt;path
                android:fillColor=&quot;#FCD83500&quot;
                android:pathData=&quot;M157.007,0C70.291,0 0,70.289 0,157.007c0,86.712 70.29,157.007 157.007,157.007c86.709,0 157.007,-70.295 157.007,-157.007C314.014,70.289 243.716,0 157.007,0zM31.403,157.015c0,-69.373 56.228,-125.613 125.604,-125.613V282.62C87.631,282.62 31.403,226.38 31.403,157.015z&quot; /&gt;
        &lt;/vector&gt;
    &lt;/rotate&gt;

I have also tried to put `&lt;bitmap&gt;` tag in between `&lt;rotate&gt;` as below:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;rotate xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:fromDegrees=&quot;90&quot;
        android:pivotX=&quot;50%&quot;
        android:pivotY=&quot;50%&quot;
        android:toDegrees=&quot;90&quot;&gt;
    
        &lt;bitmap app:srcCompat=&quot;@drawable/ic_round&quot; /&gt;
    
    &lt;/rotate&gt;

but its giving me **&#39;src&#39; attribute should be defined** and I can&#39;t use `src` with vector images. 

Any solution to use this (one image) with all angle?

&gt; NOTE: I want to use this image in `&lt;TextView&gt;` drawable.



Android : Rotate Vector Image to 90 degree

I am getting the IMEI ID null from the telephonymanager. What to do?

is there any workaround for that?



I am getting IMEI null in Android Q?

I am getting the following error while trying to build my project on Android Studio:

&gt; ERROR: No signature of method:
&gt; com.crashlytics.tools.gradle.CrashlyticsPlugin.findObfuscationTransformTask()
&gt; is applicable for argument types: (java.lang.String) values:
&gt; [DevDebug]

How to solve this?

ERROR: No signature of method: com.crashlytics.tools.gradle.CrashlyticsPlugin.findObfuscationTransformTask()

When I&#39;m building Gradle with `androidx` I get the following error. Please help me to solve this issue.

&gt; Error Message: Manifest merger failed : Attribute
&gt; application@appComponentFactory
&gt; value=(android.support.v4.app.CoreComponentFactory) from
&gt; [com.android.support:support-compat:28.0.0]
&gt; AndroidManifest.xml:22:18-91 	is also present at
&gt; [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86
&gt; value=(androidx.core.app.CoreComponentFactory).



Manifest:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;manifest xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        package=&quot;com.kanwarpreet.dealmybook&quot;&gt;
    
        &lt;application
            android:allowBackup=&quot;true&quot;
            android:icon=&quot;@mipmap/ic_launcher&quot;
            android:label=&quot;@string/app_name&quot;
            android:roundIcon=&quot;@mipmap/ic_launcher_round&quot;
            android:supportsRtl=&quot;true&quot;
            android:theme=&quot;@style/AppTheme&quot;&gt;
    
            &lt;activity android:name=&quot;.activities.SplashActivity&quot; &gt;
                &lt;intent-filter&gt;
                    &lt;action android:name=&quot;android.intent.action.MAIN&quot; /&gt;
                    &lt;category android:name=&quot;android.intent.category.LAUNCHER&quot; /&gt;
                &lt;/intent-filter&gt;
            &lt;/activity&gt;
            &lt;activity android:name=&quot;.activities.LoginActivity&quot; /&gt;
            &lt;activity android:name=&quot;.activities.RegisterActivity&quot; /&gt;
            &lt;activity
                android:name=&quot;.activities.HomeActivity&quot;
                android:label=&quot;@string/title_activity_home&quot;
                android:theme=&quot;@style/AppTheme.NoActionBar&quot; /&gt;
            &lt;activity
                android:name=&quot;.activities.BookDetailsActivity&quot;
                android:label=&quot;@string/title_activity_book_details&quot;
                android:theme=&quot;@style/AppTheme.NoActionBar&quot;/&gt;
            &lt;activity android:name=&quot;.activities.AddBookActivity&quot; /&gt;
        &lt;/application&gt;
    
    &lt;/manifest&gt;

Build.Gradle:

    apply plugin: &#39;com.android.application&#39;
    
    android {
        compileSdkVersion 28
        defaultConfig {
            applicationId &quot;com.kanwarpreet.dealmybook&quot;
            minSdkVersion 21
            targetSdkVersion 28
            versionCode 1
            versionName &quot;1.0&quot;
            testInstrumentationRunner &quot;android.support.test.runner.AndroidJUnitRunner&quot;
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile(&#39;proguard-android-optimize.txt&#39;), &#39;proguard-rules.pro&#39;
            }
        }
    }
    
    dependencies {
        implementation fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])
        implementation &#39;com.android.support:appcompat-v7:28.0.0&#39;
        implementation &#39;com.android.support.constraint:constraint-layout:1.1.3&#39;
        implementation &#39;com.android.support:support-v4:28.0.0&#39;
        implementation &#39;com.google.android.material:material:1.0.0&#39;
        implementation &#39;com.jakewharton:butterknife:10.1.0&#39;
        annotationProcessor &#39;com.jakewharton:butterknife-compiler:10.1.0&#39;
        testImplementation &#39;junit:junit:4.12&#39;
        androidTestImplementation &#39;com.android.support.test:runner:1.0.2&#39;
        androidTestImplementation &#39;com.android.support.test.espresso:espresso-core:3.0.2&#39;
    }



Manifest merger failed : Attribute application@appComponentFactory - Androidx

I have an old project that supports multi-languages. I want to upgrade support library and target platform, **Before migrating to `Androidx` everything works fine but now change language not work!**

I use this code to change default locale of App

    private static Context updateResources(Context context, String language)
    {
    	Locale locale = new Locale(language);
    	Locale.setDefault(locale);
    
    	Configuration configuration = context.getResources().getConfiguration();
    	configuration.setLocale(locale);
    
    	return context.createConfigurationContext(configuration);
    }

And call this method on each activity by override `attachBaseContext` like this:

    @Override
    protected void attachBaseContext(Context newBase)
    {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
		String language = preferences.getString(SELECTED_LANGUAGE, &quot;fa&quot;);
    	super.attachBaseContext(updateResources(newBase, language));
    }

I try other method to get string and I noticed that ‍‍‍‍`getActivity().getBaseContext().getString` work and `getActivity().getString` not work. Even the following code does not work and always show `app_name` vlaue in default resource string.xml. 

	&lt;TextView
		android:id=&quot;@+id/textView&quot;
		android:layout_width=&quot;wrap_content&quot;
		android:layout_height=&quot;wrap_content&quot;
		android:text=&quot;@string/app_name&quot;/&gt;

I share a sample code in [https://github.com/Freydoonk/LanguageTest][1]

Also `getActivity()..getResources().getIdentifier` not work and always return 0!


  [1]: https://github.com/Freydoonk/LanguageTest

Change Locale not work after migrate to Androidx

I want to use `com.google.android.material.tabs.TabLayout` component with Android&#39;s new `ViewPager` implementation `androidx.viewpager2.widget.ViewPager2`. However, the `setupWithViewPager(..)` method provided by `TabLayout` supports only the old `ViewPager` implementation. Is there a way to bind a `TabLayout` to a `ViewPager2` component easily?

How to use TabLayout with ViewPager2 in Android

Hi I&#39;m new to Android development and I&#39;m trying out a tutorial on MVVM I found on YouTube. The example project in the video uses AppCompat but I converted mine to androidx because from what I read its the current(?) version to use? Am I mistaken with this thinking?

Anyways Part of the tutorial makes use of a RecyclerView and I can&#39;t access it on my activity_main.xml file stating that v7 is an unresolved package. `android.support.v7.widget.RecyclerView` shows up with v7 onwards as red text. I know I can revert it back to older versions but I guess I am trying to make this work since moving forward its expected to know how to use androidx right? 

I don&#39;t know how to add the RecyclerView to the project with my current project migrated to androidx.

**What I&#39;ve tried:**

* Adding `implementation &#39;com.android.support:recyclerview-v7:28.0.0&#39;` based on the docs
* Invalidating cache and restarting

**My Dependencies:**
```
dependencies {
    implementation fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])
    implementation &#39;androidx.appcompat:appcompat:1.1.0-alpha04&#39;
    implementation &#39;androidx.appcompat:appcompat:1.0.0-beta01&#39;
    implementation &#39;androidx.cardview:cardview:1.0.0&#39;
    implementation &#39;androidx.constraintlayout:constraintlayout:1.1.3&#39;
    testImplementation &#39;junit:junit:4.12&#39;
    androidTestImplementation &#39;androidx.test:runner:1.1.0-alpha4&#39;
    androidTestImplementation &#39;androidx.test.espresso:espresso-core:3.1.0-alpha4&#39;

    //RecyclerView
    implementation &#39;com.android.support:recyclerview-v7:28.0.0&#39;


    // Lifecycle components
    implementation &quot;androidx.lifecycle:lifecycle-extensions:2.1.0-alpha04&quot;
    annotationProcessor &quot;androidx.lifecycle:lifecycle-compiler:2.1.0-alpha04&quot;

    // Room Components
    implementation &quot;androidx.room:room-runtime:2.1.0-alpha06&quot;
    annotationProcessor &quot;androidx.room:room-compiler:2.1.0-alpha06&quot;
}
```

**My activity_main.xml**

```
&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
&lt;androidx.constraintlayout.widget.ConstraintLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
    xmlns:tools=&quot;http://schemas.android.com/tools&quot;
    android:layout_width=&quot;match_parent&quot;
    android:layout_height=&quot;match_parent&quot;
    tools:context=&quot;.MainActivity&quot;&gt;

    &lt;view class=&quot;android.support.v7.widget.RecyclerView&quot;
        android:id=&quot;@+id/recycler_view&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        tools:listitem=&quot;@layout/todo_item&quot;/&gt;

&lt;/androidx.constraintlayout.widget.ConstraintLayout&gt;
```

How to access RecyclerView in androidx?

I&#39;m migrating my `ViewPager` to `ViewPager2` since the latter is supposed to solve all the problems of the former. Unfortunately, when using it with a `FragmentStateAdapter`, I don&#39;t find any way to get the currently displayed fragment.

`viewPager.getCurrentItem()` gives the current displayed index and `adapter.getItem(index)` generally creates a new `Fragment` for the current index. Unless keeping a reference to all created fragments in `getItem()`, I have no idea how to access the currently displayed fragment.

With the old `ViewPager`, one solution was to call `adapter.instantiateItem(index)` which would return the fragment at the desired index.

Am I missing something with `ViewPager2`?

Content Type	Original Author	Original Content on Stackoverflow
Question	murgupluoglu	View Question on Stackoverflow
Solution 1 - Android	AskNilesh	View Answer on Stackoverflow
Solution 2 - Android	Dennis	View Answer on Stackoverflow
Solution 3 - Android	Yamini	View Answer on Stackoverflow
Solution 4 - Android	Nikola Despotoski	View Answer on Stackoverflow

How to disable swiping in ViewPager2?

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Solution 4 - Android

How to mock window.location.href with Jest + Vuejs?

What do constructor type arguments mean when placed before the type?

Attributions