Error:Cannot fit requested classes in a single dex

问题:

I want to add fused location services but it shows me some error. Help me.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    buildToolsVersion "27.0.1"
    defaultConfig {
        applicationId "com.example.adil.bloodbankapplication"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:26.1.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.google.firebase:firebase-auth:11.8.0'
    compile 'com.google.firebase:firebase-database:11.8.0'
    compile 'com.android.support:support-v4:26.1.0'
    compile 'junit:junit:4.12'
    compile 'com.android.support:design:26.1.0'
    compile 'com.github.joielechong:countrycodepicker:2.1.5'
    compile 'com.jaredrummler:material-spinner:1.2.4'
    compile 'hanks.xyz:htextview-library:0.1.5'
    compile 'com.firebaseui:firebase-ui-database:1.2.0'
    compile 'com.google.android.gms:play-services:11.8.0'
}


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

回答1:

None of the answers they gave you were exhaustive. The problem lies in the Multidex. You must add the library in the app gradle :

implementation 'com.android.support:multidex:1.0.3'

After, add in the defaultConfig of the app gradle :

multiDexEnabled true

Your Application must be of the Multidex type.. You must write it in the manifest :

android:name=".MyApplication"

"MyApplication" must be either the Multidex class, or it must extend it.

回答2:

I fixed my problem with the solution below:

In Gradle build file, add dependency:

implementation 'com.android.support:multidex:1.0.3'

And then in the "defaultConfig" section, add:

multiDexEnabled true

回答3:

modify your app's or module's build.gradle

android {
    defaultConfig {
        ...
        minSdkVersion 21 <----- *here
        targetSdkVersion 26
        multiDexEnabled true <------ *here
    }
    ...
}

According to official documentation

Multidex support for Android 5.0 and higher

Android 5.0 (API level 21) and higher uses a runtime called ART which natively supports loading multiple DEX files from APK files. ART performs pre-compilation at app install time which scans for classesN.dex files and compiles them into a single .oat file for execution by the Android device. Therefore, if your minSdkVersion is 21 or higher, you do not need the multidex support library.

For more information on the Android 5.0 runtime, read ART and Dalvik.

https://developer.android.com/studio/build/multidex

回答4:

Hi problem is here remove it

compile 'com.google.android.gms:play-services:11.8.0'

why?

Note: Don't use the combined play-services target. It brings in dozens of libraries, bloating your application. Instead, specify only the specific Google Play services APIs your app uses.

And use what you need.https://developers.google.com/android/guides/setup

Like for location service

com.google.android.gms:play-services-location:11.8.0

For Cloud Messaging

com.google.android.gms:play-services-gcm:11.8.0

回答5:

If you are building DEBUG APK, just add:

debug {
            multiDexEnabled true
        }

inside buildTypes

and if you are building RELEASE APK, add multiDexEnabled true in release block as-

release {
                ...
                multiDexEnabled true
                ...
        }

回答6:

You have too many methods count. Android dex file has a limit of 65536 methods you are allowed to have.

For starters, if you don't need all of google play services API and just the location, replace

compile 'com.google.android.gms:play-services:11.8.0'

with

compile 'com.google.android.gms:play-services-location:11.8.0'

You can refer to this page for ways to avoid it or if needed to allow more: https://developer.android.com/studio/build/multidex.html

回答7:

In Gradle build file, add dependency:

implementation 'com.android.support:multidex:1.0.2'

or

implementation 'com.android.support:multidex:1.0.3'

or

implementation 'com.android.support:multidex:2.0.0'

And then in the "defaultConfig" section, add:

multiDexEnabled true

Under targetSdkVersion

   minSdkVersion 17
    targetSdkVersion 27
    multiDexEnabled true

Now if you encounter this error

Error:Failed to resolve: multidex-instrumentation Open File

You need to change your gradle to 3.0.1

        classpath 'com.android.tools.build:gradle:3.0.1'

And put the following code in the file gradle-wrapper.properties

distributionUrl=https://services.gradle.org/distributions/gradle-4.1-all.zip

Finally

add class Applition in project And introduce it to the AndroidManifest Which is extends from MultiDexApplication

public class App extends MultiDexApplication {

@Override
public void onCreate( ) {
    super.onCreate( );
}

}

Run the project first to create an error, then clean the project

Finally, Re-launch the project and enjoy it

回答8:

I have no idea why, maybe it is because I develop in Kotlin but to fix this error I finally have to create a class that extends MultiDexApplication like this:

class MyApplication : MultiDexApplication() {
}

and in my Manifest.xml I have to set

<application
        ...
        android:name=".MyApplication">

to not confuse anyone, I also do:

multiDexEnabled true
implementation 'com.android.support:multidex:1.0.3'

for androidx, this also works for me:

implementation 'androidx.multidex:multidex:2.0.0'

...

<application android:name="android.support.multidex.MultiDexApplication">

does not work for me

回答9:

You can follow this.

Versions of the platform prior to Android 5.0 (API level 21) use the Dalvik runtime for executing app code. By default, Dalvik limits apps to a single classes.dex bytecode file per APK. In order to get around this limitation, you can add the multidex support library to your project:

dependencies {
  implementation 'com.android.support:multidex:1.0.3'
}

If your minSdkVersion is set to 21 or higher, all you need to do is set multiDexEnabled to true in your module-level build.gradle file, as shown here:

android {
    defaultConfig {
        ...
        minSdkVersion 21 
        targetSdkVersion 28
        multiDexEnabled true
    }
    ...
}

回答10:

All I had to do was set the Minimum SDK Version to 21 in File > Project Structure > App > Flavors

回答11:

I have encountered this error twice and the solution for this is; Check you app gradle file to see your target SDk, if it is 20 or higher, just add one line to your defaultconfig { multiDexEnabled true }

Else if your targetSDK is less than 20, add the line to your defaultConfig and also add a dependency

implementation 'com.android.support:multidex:1.0.3'.

Check this link for more.

https://developer.android.com/studio/build/multidex#mdex-gradle

回答12:

multiDexEnabled true

Please try adding this in your app defaultConfig {}.This help me to solve the problem