Android X: tools:replace specified at line: for attribute, but no new value specified

Question

I have tried many solutions on this website but still, the problem is not solved. The issue is due to Android X library. When I added Android X, this issue was resolved but it opened up new issue. How to fix this issue?

Earlier this error was coming:

Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:19:5-142:19 to override.

After I added tools:replace="android:appComponentFactory", this error is came:

 java.lang.RuntimeException: Manifest merger failed with multiple errors, see logs
at com.android.builder.core.AndroidBuilder.mergeManifestsForApplication(AndroidBuilder.java:540)    
at com.android.build.gradle.tasks.MergeManifests.doFullTaskAction(MergeManifests.java:173)

Merging Error (in Android Manifest):

Error: tools:replace specified at line:2 for attribute android:appComponentFactory, but no new value specified app main manifest (this file), line 1

Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest
    package="com.example"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:replace="allowBackup, android:appComponentFactory"
    android:allowBackup="false">

    ...

    <application
        android:name="com.example"
        android:icon="@mipmap/icon"
        android:debuggable="true"
        android:hardwareAccelerated="false"
        android:largeHeap="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:allowBackup="false"
        tools:ignore="GoogleAppIndexingWarning,HardcodedDebugMode">
       ...

Have you checked this answer : https://stackoverflow.com/a/54825603/1318946 — Pratik Butani, Feb 22 '19 at 11:46
By any chance are you using firebase? If yes the newest versions are on android X hence the error — griffins, Jun 26 '19 at 03:26
I faced this error when my project was not migrated to androidX & I tried syncing the CameraX library. After migrating everything is working fine. — Bhriguraj Salponia, May 21 '20 at 13:27

Akshay · Answer 1 · 2022-04-04T06:50:36.803

104

I think you are migrating to AndroidX libs.

Add below lines to gradle.properties file

android.useAndroidX=true
android.enableJetifier=true

Remove tools:replace="android:appComponentFactory" from manifest.

Replace import from android.support.v7.app.AppCompatActivity to androidx.appcompat.app.AppCompatActivity in activities. Use replace in project to expedite the process of refactoring.

Migrating to AndroidX

edited Apr 04 '22 at 06:50

answered Nov 13 '18 at 08:48

Akshay

1,612
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6

Where should I replace android.support.v7.app.AppCompatActivity ? – Lucky_girl Jun 18 '19 at 09:24
@Lucky_girl You must be using `android.support.v7.app.AppCompatActivity`. This means you must have created children activities of this activity. Replace them with `androidx.appcompat.app.AppCompatActivity ` – Malwinder Singh Jun 26 '19 at 12:45
I did everything same but getting this error : `Manifest merger failed : Attribute application@appComponentFactory value=(whateverString) from AndroidManifest.xml:26:9-53 is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory). Suggestion: add 'tools:replace="android:appComponentFactory"' to element at AndroidManifest.xml:23:5-149:19 to override. ` – Ali Akram Jun 27 '19 at 09:29
@AliAkram that happens when your app, that isn't configured for AndroidX, uses a library that actually uses AndroidX. What you should do is look at the library release history and see if there's a release prior to that libraries' switch to AndroidX. Finally write yourself a work item to convert your app to AndroidX - it can take quite a while depending on the size of the project. – Someone Somewhere Jul 16 '19 at 23:37

Gabriel Aguirre · Answer 2 · 2018-11-13T21:53:54.677

41

You can try adding:

android:appComponentFactory="android.support.v4.app.CoreComponentFactory"

To the tag <application > in your manifest.

edited Nov 13 '18 at 21:53

answered Nov 13 '18 at 16:26

Gabriel Aguirre

559
4
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This is not a good solution as it forces one to use API Level 28 or higher – Ojonugwa Jude Ochalifu Feb 06 '19 at 08:15
Thanks, this is worked for me, but it is ok to keep using it even on production? – Mohammed Alawneh Jul 16 '19 at 09:27

score 13 · Answer 3 · answered Apr 25 '19 at 09:09

13

I got same error in my project, I have resolved it You can try it

Android Studio > Refactor > Migrate to AndroidX

answered Apr 25 '19 at 09:09

shailesh

409
5
11

2

No it automatically fixes all imports – F0r3v3r-A-N00b Aug 20 '19 at 01:25

score 6 · Answer 4 · answered Jun 26 '19 at 10:50

6

In my case, I had updated Firebase and play services dependency, result in this issue.

Reverted back the dependency updates and the error vanished

Seems that the latest Firebase and Play Service dependencies are compatible with androidx.

answered Jun 26 '19 at 10:50

codepeaker

408
7
14

score 5 · Answer 5 · answered Jul 03 '19 at 02:26

It often happened because you used Androidx libraries and support libraries at the same time. Some 3rd-party libraries may contain support libraries and other 3rd-party libraries may contain Androidx libraries, this can also lead this problem. If you have gradle environment in you PC, try "gradlew :app:dependencies" command in the terminal of Android Studio, this command will list all libraries including 3rd-party libraries of your project, and see which library or framework used Androidx libraries and which not. Then try to upgrade old libraries used support libraries, and this problem should disappear.

score 5 · Answer 6 · answered Dec 19 '19 at 06:46

I added below lines inside <application> tag

tools:replace="android:appComponentFactory" android:appComponentFactory="android.support.v4.app.CoreComponentFactory"

below lines inside gradle.properties file

android.useAndroidX=true android.enableJetifier=true

Rebuild your project.

score 4 · Answer 7 · answered Mar 04 '20 at 18:12

migrate to android x

add below lines inside tag

    tools:replace="android:appComponentFactory"
    android:appComponentFactory="android.support.v4.app.CoreComponentFactory"

then also add below lines inside gradle.properties file

  android.useAndroidX=true
  android.enableJetifier=true

Rebuild your project.

score 3 · Answer 8 · answered Sep 18 '19 at 07:10

3

you need just add this code in gradle.properties file

android.useAndroidX=true
android.enableJetifier=true

answered Sep 18 '19 at 07:10

Rasoul Miri

7,206
57
67

3

How is that helping? – Coding John Oct 30 '19 at 12:55
i dont have this file in project. I have a 3 or 4 years old app and trying to set it up – Awais Mustafa May 12 '20 at 12:38
create a new project and copy all old files in the new project – Rasoul Miri May 13 '20 at 06:37

score 3 · Answer 9 · answered Mar 31 '22 at 05:18

In build.gradle

//noinspection GradleCompatible
implementation 'com.android.support:design:28.0.0'

In gridle.properties add following line

android.enableJetifier=true

In AndroidMenifest.xml in <menifest ...

xmlns:tools="http://schemas.android.com/tools"

and in <application ... add following attributes

tools:replace="android:appComponentFactory"
        android:appComponentFactory="android.support.v4.app.CoreComponentFactory"
        tools:targetApi="p"

score 2 · Answer 10 · answered Jul 23 '19 at 10:51

2

In my case, i was facing problem because of the firebase version i was using. Downgrading the firebase version helped me.

implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1' implementation 'com.google.firebase:firebase-core:16.0.6'

answered Jul 23 '19 at 10:51

rishabh gupta

71
1
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score 0 · Answer 11 · answered Aug 01 '21 at 08:27

Just configure your manifest application tag this way

<application
        android:fullBackupContent="true"
        android:usesCleartextTraffic="true"
        tools:targetApi="m"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Media">

Alexa289 · Answer 12 · 2021-10-05T02:24:23.720

in my case I have problem with

tools:replace="android:usesCleartextTraffic"

I have already use AndroidX, I have already have these properties in gradle.properties

android.useAndroidX=true
android.enableJetifier=true

the problem is I forget to set the value to be true (or it can be false, depends on your case)

<application
        android:label="myApp"
        tools:replace="android:usesCleartextTraffic"
        android:usesCleartextTraffic="true"> // I forget this line

Android X: tools:replace specified at line: for attribute, but no new value specified

12 Answers12

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