How to fix appcompat error in android studio

Question

I want to work with firebase real time database and when I implement firebase core and firebase database library appcompat get error. My app module code is below?

 android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.mahdi.smsreviver"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies

    {
        implementation fileTree(dir: 'libs', include: ['*.jar'])
        implementation 'com.android.support:appcompat-v7:27.1.1'
        implementation 'com.android.support.constraint:constraint-layout:1.1.3'
        implementation 'com.google.firebase:firebase-database:16.1.0'
        testImplementation 'junit:junit:4.12'
        androidTestImplementation 'com.android.support.test:runner:1.0.2'
        androidTestImplementation 'com.android.support.test.espresso:espresso- 
        core:3.0.2'
        implementation 'com.google.firebase:firebase-core:16.0.7'
    }

    apply plugin: 'com.google.gms.google-services'

it might be a warning due to not using latest version of library, try updating version from 27.1.1 to 28.0.0 and check. — karan, Mar 06 '19 at 05:52
check [this](https://stackoverflow.com/questions/50134196/problems-with-com-android-supportappcompat-v7-27-1-1-in-the-gradle-file) out ! — Swati, Mar 06 '19 at 05:54

score 1 · Answer 1 · answered Mar 06 '19 at 05:58

1

Don't use appcompat, Use AndroidX the new support version library from Google. It has better compatibility features and other noticeable features. Besides Appcompat is so Old.

answered Mar 06 '19 at 05:58

raj kavadia

926
1
10
30

score 1 · Accepted Answer · answered Mar 06 '19 at 06:13

from firebase release note you are using the latest version(firebase-core 16.0.7) which conflicts with appcompat version(27.1.1)

so please update gradle

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.mahdi.smsreviver"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7.28.0.0'
    implementation 'com.google.firebase:firebase-database:16.0.6'

    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso- 
    core:3.0.2'
    implementation 'com.google.firebase:firebase-core:16.0.7'
}

apply plugin: 'com.google.gms.google-services'

How to fix appcompat error in android studio

2 Answers2