Didn't find class on path: DexPathList?

Question

My app is working fine when I test in real device using USB in android studio.But When I send the apk to another device and install there,it is not working.App get crashed.I did not find any right way to solve the problem.Errors are given below:

FATAL EXCEPTION: main Process: com.w3xplorers.cmch,PID: 17715                                                                           java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.w3xplorers.cmch/com.w3xplorers.cmch.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.w3xplorers.cmch.MainActivity" on path: DexPathList[[zip file "/data/app/com.w3xplorers.cmch-1/base.apk"],nativeLibraryDirectories=[/data/app/com.w3xplorers.cmch-1/lib/arm, /system/lib, /vendor/lib, system/vendor/lib, system/vendor/lib/egl, system/lib/hw]]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2395)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2544)
    at android.app.ActivityThread.access$900(ActivityThread.java:150)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:168)
    at android.app.ActivityThread.main(ActivityThread.java:5845)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:797)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.w3xplorers.cmch.MainActivity" on path: DexPathList[[zip file "/data/app/com.w3xplorers.cmch-1/base.apk"],nativeLibraryDirectories=[/data/app/com.w3xplorers.cmch-1/lib/arm, /system/lib, /vendor/lib, system/vendor/lib, system/vendor/lib/egl, system/lib/hw]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1085)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2385)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2544) 
    at android.app.ActivityThread.access$900(ActivityThread.java:150) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:168) 
    at android.app.ActivityThread.main(ActivityThread.java:5845) 
    at java.lang.reflect.Method.invoke(Native Method) 
    atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:797) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687)                                                                         Suppressed: java.lang.ClassNotFoundException: com.w3xplorers.cmch.MainActivity
    at java.lang.Class.classForName(Native Method)
    at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
    at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:504)                                                                                ... 12 more
    Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

My Manifests is below:

`<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.w3xplorers.cmch">

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.SEND_SMS" />


<application
    android:name="com.w3xplorers.cmch.EnableMultiDex"
    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/AppTheme" >
    <activity
        android:name="com.w3xplorers.cmch.MainActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.w3xplorers.cmch.HomeActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.QuickSms"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.GroupSms"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.SelfSms"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.Contact"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.Favourite"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity
        android:name="com.w3xplorers.cmch.Info"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity android:name="com.w3xplorers.cmch.Dialog" />
</application>

</manifest>`

Gradle below:

apply plugin: 'com.android.application'

android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
    applicationId "com.w3xplorers.cmch"
    minSdkVersion 13
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    multiDexEnabled true
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}


dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', 
{
    exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.0'
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha5'
compile 'com.android.support:design:25.3.0'
compile 'com.andreabaccega:android-form-edittext:1.0.3'
compile 'com.android.volley:volley:1.0.0'
compile 'com.squareup.okhttp3:okhttp:3.3.1'
compile 'com.android.support:multidex:1.0.1'
testCompile 'junit:junit:4.12'
}

score 18 · Answer 1 · edited Feb 11 '20 at 12:26

18

I had to enable Java 8 Support after updating to Android Studio 3.5

Add the following lines in your build.gradle file:

android {
    defaultConfig {
            ...
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

You can check the documentation here: https://developer.android.com/studio/write/java8-support

edited Feb 11 '20 at 12:26

Akshay Choudhry

122
1
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9

answered Sep 04 '19 at 13:50

Johan Ferreira

515
4
15

1

I think this is a more relevant answer today. – Akshay Choudhry Feb 11 '20 at 10:32
Fixed it for me! – ores May 04 '20 at 19:38
As per the [documentation](https://developer.android.com/studio/write/java8-support) I need to include the following dependencies in app gradle ```coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.0'``` . Then upgraded the gradle plugin to below ```classpath 'com.android.tools.build:gradle:7.2.0'``` – Baskar PC Jan 13 '23 at 14:13

score 9 · Answer 2 · answered Apr 18 '17 at 16:10

9

Go to your project level build.gradle file and decrease the version of gradle dependency to anything lower than 2.3.0, say use 2.2.3

dependencies {
    classpath 'com.android.tools.build:gradle:2.2.3'
    ....
}

Then clean -->build -->install debug apk to other device-->it may be OK then!

answered Apr 18 '17 at 16:10

ridoy

6,274
2
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60

2

Try with disabling instant run feature of android studio. – ridoy Jul 20 '17 at 17:01

score 8 · Answer 3 · answered Dec 28 '18 at 08:36

8

Quit Android studio
Try to delete .idea and .graddle
Restart android studio and rebuild your project

It worked like a charm for me :)

answered Dec 28 '18 at 08:36

Nicolas Facciolo

130
1
7

1

clean and rebuild worked for me. Sometimes you spend hours on the problem when in reality you need just to clean and rebuild it. I need to remember that next time! – DemoDemo Feb 14 '20 at 20:59

score 7 · Answer 4 · answered Apr 18 '17 at 08:15

7

in your application tag, change

android:name="com.w3xplorers.cmch.EnableMultiDex"

with

android:name="android.support.multidex.MultiDexApplication"

Hope this helps :)

more information at:

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

answered Apr 18 '17 at 08:15

Mohaimanul Chowdhury

111
9

Wow, that is somehow started to work for me. But does it works if I also need to use custom Application class ? – aleksandrbel Dec 05 '17 at 12:04
Then in your java code of custom application class you've to extend multidex class and in the manifest declare the name of that application class. follow the link above, that should help :) – Mohaimanul Chowdhury Dec 07 '17 at 21:15
1

This isn't needed if you extend **MultiDexApplication** – IgorGanapolsky Feb 21 '18 at 13:11

score 6 · Answer 5 · answered Aug 15 '17 at 12:15

6

I think the problem is AndroidStudio is tying to use "Instant Run" instead of compiling and installing a fresh APK.

Disable "Instant Run" from File -> Settings -> Build,Execution, Deployment -> Instant Run.

answered Aug 15 '17 at 12:15

Hasan Hashem

463
5
10

2

This error can happen from commandline, not just Android Studio – IgorGanapolsky Feb 21 '18 at 13:12

score 4 · Accepted Answer · answered Apr 19 '17 at 09:42

4

I did not find any perfect solution for my problem.But when I upload my apk on google play and download from there,app is working fine.This is the most weird solution I have ever found.

answered Apr 19 '17 at 09:42

Avijit

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8
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4

this is not solution :( i guess u had problem in debug variant so on google play store ur apk was in release version thats y u didnt found this issue for release version – Android is everything for me Jan 28 '20 at 10:53

score 3 · Answer 7 · answered Apr 18 '17 at 11:23

3

defaultConfig {

    minSdkVersion 14
    targetSdkVersion 21

    multiDexEnabled true
}

 dependencies {
     compile 'com.android.support:multidex:1.0.1'
 }

answered Apr 18 '17 at 11:23

Srinivas Keerthiprakasam

885
11
29

1

While this code may answer the question, providing additional [context](https://meta.stackexchange.com/q/114762) regarding _how_ and/or _why_ it solves the problem would improve the answer's long-term value. Remember that you are answering the question for readers in the future, not just the person asking now! Please [edit](http://stackoverflow.com/posts/43470823/edit) your answer to add an explanation, and give an indication of what limitations and assumptions apply. It also doesn't hurt to mention why this answer is more appropriate than others. – Dev-iL Apr 18 '17 at 16:19
1

Works for me after adding this dependency in build.gradle – Badrinath Aug 28 '17 at 21:40
@Badrinath Good – Srinivas Keerthiprakasam Sep 05 '19 at 14:56

score 3 · Answer 8 · edited Mar 12 '18 at 12:00

3

android {
    defaultConfig {
        ...
        minSdkVersion 15 
        targetSdkVersion 26
        multiDexEnabled true
    }
    ...
}

dependencies {
  compile 'com.android.support:multidex:1.0.1'
}



public class MyApplication extends SomeOtherApplication {
  @Override
  protected void attachBaseContext(Context base) {
     super.attachBaseContext(base);
     MultiDex.install(this);
  }
}

Maybe you don't make your application Multidex.install(this);

edited Mar 12 '18 at 12:00

Analizer

1,594
16
30

answered Sep 05 '17 at 08:12

tosslife

31
3

It worked like a charm! Specially the attachBaseContext part! I didn't know about that! Thank you! – Christian Jun 26 '19 at 13:34

score 3 · Answer 9 · answered Apr 10 '18 at 09:57

You have to follow official documentation: https://developer.android.com/studio/build/multidex.html#mdex-gradle

build.gradle:

dependencies {
  compile 'com.android.support:multidex:1.0.1'
}
android {
    defaultConfig {
        ...
        minSdkVersion 21 
        targetSdkVersion 26
        multiDexEnabled true
    }
    ...
}

YourApp class

public class MyApplication extends SomeOtherApplication {
  @Override
  protected void attachBaseContext(Context base) {
     super.attachBaseContext(base);
     MultiDex.install(this);
  }
}

score 2 · Answer 10 · answered Apr 18 '17 at 12:28

2

I also faced similar problem. In my case I solved the problem by adding this below buildTypes

dexOptions {
    javaMaxHeapSize "4g"
}

also used

defaultConfig { 
          multiDexEnabled true
 }

and

dependencies {
         compile 'com.android.support:multidex:1.0.0'
}

answered Apr 18 '17 at 12:28

Tamal

200
1
11

What does **javaMaxHeapSize** do? – IgorGanapolsky Jul 17 '17 at 21:27
please see [this link](https://stackoverflow.com/a/33751673/3682169) for details of javaMaxHeapSize. – Tamal Jul 19 '17 at 09:16

score 2 · Answer 11 · answered Apr 18 '17 at 19:11

2

As you said, you build the app and pushed to your phone through USB, I believe then you copied the apk from your build directory and trying to push and run on other device. Please try to build your apk without targeting or connecting any device or emulator what i mean that build your apk from terminal without connecting your device. Either it will work or it will show something.

answered Apr 18 '17 at 19:11

Omar Faroque Anik

2,531
1
29
42

Hi, I was doing the same as mentioned in this Question. Your answer helped a lot. Thanks :) – DroidLearner Jul 12 '17 at 18:02

score 1 · Answer 12 · answered Apr 16 '17 at 09:32

1

In your build.gradle add

defaultConfig { 
          multiDexEnabled true
 }

Also add a dependency as

dependencies {
         compile 'com.android.support:multidex:1.0.0'}

answered Apr 16 '17 at 09:32

Smeet Hirekhan

26
4

1

Try cleaning and syncing the project. – Smeet Hirekhan Apr 16 '17 at 11:31

score 1 · Answer 13 · answered Jan 26 '18 at 13:34

1

Its may be because you have Instant Run feature enable so just try to Disable Instant Run.

File -> Settings -> Build,Execution, Deployment -> Instant Run -> Uncheck the checkbox for instant run

answered Jan 26 '18 at 13:34

Nikunj

3,937
19
33

Ngima Sherpa · Answer 14 · 2019-12-13T14:04:45.563

Carefully follow this steps:

STEP 1: Add multidex in app level gradle

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

STEP 2: Enable multidex

defaultConfig { 
    multiDexEnabled true 
}

STEP 3: Last add this code inside application. Pass parameter from attachBaseContext context in MultiDex.install(<<[parameter]) like:

@Override 
protected void attachBaseContext(Context base) { 
    super.attachBaseContext(base); 
    MultiDex.install(base); //not this use base. MultiDex.install(this); this will lead to some error in some prelolipop device.
}

score 1 · Answer 15 · answered Apr 29 '20 at 14:24

1

After you have tried all the answers mentioned here and it still does not work, try File -> Invalidate Caches/ Restart -> Invalidate and Restart.

It worked for me.

answered Apr 29 '20 at 14:24

Alankrita Shah

101
2
5

score 1 · Answer 16 · answered May 19 '22 at 23:07

1

THIS WILL WORK!

Make sure your manifest activity name has the complete path to activity rather than a shortcut of using "." to access the main package.

answered May 19 '22 at 23:07

Harinder Pal

21
3

score 1 · Answer 17 · answered Aug 31 '22 at 14:21

Flutter dev here with same problem.

File android/app/src/main/kotlin/client/MainActivity.kt was missing.

I think this is the only piece of native android code that link the manifest to the flutter engine.

I had to copy paste from a another project, and change package name

package the.idenfier.of.my.app

import io.flutter.embedding.android.FlutterActivity

class MainActivity: FlutterActivity() {

}

score 0 · Answer 18 · answered Oct 21 '17 at 23:00

0

It seems random to me to resolve this issue. I simply change the android:name to the MultiDex from android, run it, then change it back to my own app.

answered Oct 21 '17 at 23:00

Pencilcheck

2,664
3
25
14

score 0 · Answer 19 · answered Nov 27 '17 at 04:06

0

Clear your project and Invalidate caches/ restart in your in your Android studio file section, it works for me.

answered Nov 27 '17 at 04:06

Shyam

185
2
7

score 0 · Answer 20 · answered Jan 13 '18 at 16:00

To people running into this and using Kotlin for their instrumentation tests:

Keep in mind that spaces in method names work only for JVM tests and not Android Instrumentation Tests (as noted by Jake Wharton, he also said this might be fixed in the future)

At the moment, when I try to run a test like:

@Test
fun `spaces should work in names`() {
}

Test output says:

No tests were found

And the log says:

Started running tests

Test running failed: Instrumentation run failed due to 'Process crashed.'

Empty test suite.

While Logcat outputs this exception:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example, PID: 5424
    java.lang.RuntimeException: Unable to instantiate instrumentation
    ComponentInfo{com.example.test/android.support.test.runner.AndroidJUnitRunner}:
    java.lang.ClassNotFoundException: Didn't find class
    "android.support.test.runner.AndroidJUnitRunner"
    on path: DexPathList[[],nativeLibraryDirectories=[/system/lib, /vendor/lib]]
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5730)
        at android.app.ActivityThread.-wrap1(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1661)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
    Caused by: java.lang.ClassNotFoundException: Didn't find class
    "android.support.test.runner.AndroidJUnitRunner" on path:
    DexPathList[[],nativeLibraryDirectories=[/system/lib, /vendor/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5728)
        at android.app.ActivityThread.-wrap1(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1661) 
        at android.os.Handler.dispatchMessage(Handler.java:105) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6541) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

As you can see, the errors are not very helpful here, so I hope people will find this answer now. The solution is simple, use valid names like:

@Test
fun spaces_dontWorkInNames() {
}

score 0 · Answer 21 · answered Jun 02 '19 at 14:55

You can refer to Mohaimanul Chowdhury's answer. If you're using custom Application class change it from extending Application to MultiDexApplication

for example

class YourApplication : Application()

to

class YourApplication : MultiDexApplication()

it fixed my problem

score 0 · Answer 22 · edited Sep 03 '19 at 12:50

0

Change the extended class of you application class

from public class MyApplication extends Application { ... }

to public class MyApplication extends MultiDexApplication { ... }

For more explanation just follow the official documentation: https://developer.android.com/studio/build/multidex.html#mdex-gradle

it works for me

edited Sep 03 '19 at 12:50

Nappy

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answered Sep 03 '19 at 12:27

Mohammed H. Hannoush

461
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score 0 · Answer 23 · answered Sep 01 '20 at 05:53

0

gradlew clean in yourflutterproject/android
works for me

answered Sep 01 '20 at 05:53

Lewis Weng

942
7
5

score 0 · Answer 24 · answered Nov 08 '20 at 13:26

0

Check if the Activity is correctly spelled out in the Android manifest

answered Nov 08 '20 at 13:26

Сергей Беляков

190
1
8

score 0 · Answer 25 · answered Jan 06 '23 at 12:22

0

In your AndroidManifest.xml file

Rename this:

<activity
        android:name="com.w3xplorers.cmch.MainActivity"

To this:

<activity
            android:name=".MainActivity"

answered Jan 06 '23 at 12:22

BradG

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score -1 · Answer 26 · answered Aug 19 '19 at 13:47

-1

Can you check your MainActivity is written with Kotlin instead of Java?

I disabled Kotlin and write Activity with Kotlin and It caused this error.

answered Aug 19 '19 at 13:47

MJ Studio

3,947
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score -1 · Answer 27 · answered Sep 24 '22 at 05:58

Firstly,this can happens if you haven't define your activiy in Manifest.xml file. Secondly,if you convert your java class file into kotlin class file and when you run Project,it will leads to didn't find class on path-dexpathlist. So better to keep it in java.

Didn't find class on path: DexPathList?

27 Answers27

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