CODEWITHSUNDEEP
androidandroid-studiokotlintags
Manuele Mustari
Manuele Mustari

Reputation: 21

Unresolved tag Android Studio

I'am working on an app that can download, modify, read, show and share PDF. To do this, I found a youtube video that use some external libraries on github. I tried to add to my project (especially in an xml file) a PDF Viewer from a repository that the video advised to use but when I run into a problem and I don't Know why. The program says that there is an "unresolvable tag" but I don't Know how to resolve it. I attach the full code below, thanks for help.

<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
tools:context=".MainActivity">

<TextView android:id="@+id/tcTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="PDF Viewer Demo"
    android:textStyle="bold"
    android:textSize="18sp"
    android:layout_margin="10dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    />

<com.github.barteksc.pdfviewer.PDFView
    android:id="@+id/pdfView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/tcTitle"
    android:background="@color/white"
    android:layout_marginTop="10dp"
    android:layout_marginStart="10dp"
    android:layout_marginEnd="10dp"
    android:layout_marginBottom="70dp"
    />

<Button android:id="@+id/shareButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    android:text="SHARE PDF"
    android:padding="10dp"
    android:layout_margin="20dp"
    />

<ProgressBar android:id="@+id/progressBar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    />
    </androidx.constraintlayout.widget.ConstraintLayout>

These are the solutions that Android Studio advices

Upvotes: 0

Views: 896

Answers (3)

poovarasan ups
poovarasan ups

Reputation: 1

Go to refactor menu and migrate to the project Android x it's working for me

And also implemented the dependency library as above comments mentioned

Upvotes: 0

Lucas
Lucas

Reputation: 763

In build.gradle(:app) add

    implementation 'com.github.mhiew:android-pdf-viewer:3.2.0-beta.1'

in the

dependencies {}

block.

In gradle.properties add

android.enableJetifier=true

Adding it before or after

android.useAndroidX=true

will be ok. That is it.

Upvotes: 0

user496854
user496854

Reputation: 6830

It's telling you the com.github.barteksc.pdfviewer.PDFView class isn't found, which means that you didn't import it into your project properly.

How did you include it in your project? Did you add use the following in your app gradle?

implementation 'com.github.barteksc:android-pdf-viewer:version'

Or did you download the source code, and import it into your poroject?

Upvotes: 2

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