[android] Can I use library that used android support with Androidx projects.

I know, androidx and support dependency causing multidex error We can not use androidx and android support at a same time. So I totally migrate to androidx. but one of my dependency lib used android support "lottie".

What can we do in above situation? Should I remove 'lottie' from my project.

below is my gradle

defaultConfig {
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
        multiDexEnabled true
    }

    ext{
    lottieVersion = "2.5.4"
}


dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

    def androidx = "1.0.0-rc01"
    api "androidx.constraintlayout:constraintlayout:1.1.2"
    api "androidx.appcompat:appcompat:$androidx"
    api "androidx.recyclerview:recyclerview:$androidx"
    api "androidx.cardview:cardview:$androidx"
    api "androidx.core:core-ktx:$androidx"
    api "com.google.android.material:material:1.0.0-rc01"
    implementation "com.google.code.gson:gson:2.8.5"
    implementation "androidx.multidex:multidex:2.0.0"
    implementation "com.airbnb.android:lottie:$lottieVersion"
    }

Comment This Line in gradle.properties

android.useAndroidX=true

I added below two lines in gradle.properties file

android.useAndroidX=true
android.enableJetifier=true

then I got the following error

error: package android.support.v7.app does not exist
import android.support.v7.app.AlertDialog;
                         ^
                         

I have removed the imports and added below line

import static android.app.AlertDialog.*;

And the classes which are extended from AppCompactActivity, added the below line. (For these errors you just need to press alt+enter in android studio which will import the correct library for you. Like this you can resolve all the errors)

import androidx.appcompat.app.AppCompatActivity;

In your xml file if you have used any

<android.support.v7.widget.Toolbar 

replace it with androidx.appcompat.widget.Toolbar

then in your java code

import androidx.appcompat.widget.Toolbar;

Add the lines in the gradle.properties file

android.useAndroidX=true
android.enableJetifier=true

Refer also https://developer.android.com/jetpack/androidx

I used these two lines of code in application tag in manifest.xml and it worked.

 tools:replace="android:appComponentFactory"    
 android:appComponentFactory="whateverString"

Source: https://github.com/android/android-ktx/issues/576#issuecomment-437145192

Manually adding android.useAndroidX=true and android.enableJetifier=true giving me hard time. Because it's throw some error or Suggestion: add 'tools:replace="android:appComponentFactory"' to <application>

To Enable Jet-fire in project there is option in android Studio

Select Your Project ---> Right Click

app----> Refactor ----> Migrate to AndroidX

Shown in below image:-

After click on Migrate to AndroidX.

It will ask for confirmation and back up for your project.

And last step it will ask you for to do refactor.

After doing Refactor check your gradle.properties have android.useAndroidX=true and android.enableJetifier=true. If they are not then add these two lines to your gradle.properties file:

android.useAndroidX=true
android.enableJetifier=true

Note:- Upgrading using Android Studio, this option works if you have android studio 3.2 and onward. Check this

You need not to worry

Just enable Jetifier in your projet.

• Update Android Studio to 3.2.0 or newer.

• Open gradle.properties and add below two lines.

  android.enableJetifier=true
  android.useAndroidX=true
  

It will convert all support libraries of your dependency to AndroidX at run time (you may have compile time errors, but app will run).

API 29.+ usage AndroidX libraries. If you are using API 29.+, then you cannot remove these. If you want to remove AndroidX, then you need to remove the entire 29.+ API from your SDK:

This will work fine.

I had a problem like this before, it was the gradle.properties file doesn't exist, only the gradle.properties.txt , so i went to my project folder and i copied & pasted the gradle.properties.txt file but without .txt extension then it finally worked.

If your project is not AndroidX (mean Appcompat) and got this error, try to downgrade dependencies versions that triggers this error, in my case play-services-location ("implementation 'com.google.android.gms:play-services-location:17.0.0'") , I solved the problem by downgrading to com.google.android.gms:play-services-location:16.0.0'