Default activity not found android studio ошибка

If you see that error occur after upgrading versions of IntelliJ IDEA or Android Studio, or after generating a new APK file, you may need to refresh the IDE’s cache.

Menu File → Invalidate Caches and restart…

I can’t comment on why the upgrade of IntelliJ IDEA might cause this problem because I don’t use it.

However, that error: «Default Activity Not Found» seems to be telling you that you don’t have an activity declared in file AndroidManifest.xml that is marked as the main activity, to be launched when the application starts.

You should have at least one activity that looks something like this:

<activity
        android:name="com.your.package.name.YourActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
</activity>

If you don’t have at least one activity with an intent filter like that, you would most likely see the error message you have included here.

You should add that intent filter to the Activity that you wish to open when you start the application, and that should fix your problem.

Additional details

(Android Studio 4.1.2) if the project is created as EmptyApplication then the developer must manually create below three files to avoid the Default Activity Not Found error:

File AndroidManifest.xml

File MainActivity.java

File activity_main.xml

If your app has a launch activity default, possibly this could be your mistake:

Step 1: Select Edit Configurations

Step 2: watch this warning: Default Activity not found

Step 3: select a default activity

Step 3: Save your changes and finish

Good Luck

If you are working on a widget app, this solution should work for you:

1. Go to Edit Configuration
2. Set Launch Option to Nothing

The correct way to do this is to add the following to the Manifest file:

<activity
    android:name="FULL_NAME_OF_YOUR_ACTIVITY"
    android:label="@string/app_name" >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

This should be inserted between:

<application> </application>

No need in invalidating caches.

Try to right click on the project and choose Open Module Settings. Then go to the Sources tab in your module, find the src folder, right click on it and mark it as Sources (blue color).

There is no sources tab in later versions of Android Studio, but you can edit the build.gradle file instead: How to add a linked source folder in Android Studio?

In Android Studio 4.0, please change Launch to Nothing:

Run/Debug Configuration → Android App → app → General → Launch Options → set Launch to Nothing.

answered Jan 25, 2015 at 21:29

Nothing in the previous answers helped me. After some time I found that IntelliJ IDEA changed action names to uppercase. Like:

<intent-filter>
  <action android:name="ANDROID.INTENT.ACTION.MAIN"/>
  <category android:name="ANDROID.INTENT.CATEGORY.LAUNCHER"/>
</intent-filter>

After reverting to normal, IDEA recognizes the default activity:

<intent-filter>
  <action android:name="android.intent.action.MAIN" />
  <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

Firstly make sure that you have the included default activity in manifest.

Example:

<activity android:name=".DefaultActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

If you have tried everything and nothing seems to works then

• Delete the cache from your %Home%.gradlecaches and sync project again.

Or check this answer:

Android Studio shows wrong file contents

This solution is 100% working

You must be seeing this:

First, open your manifest and check if this is present,

  <activity
      android:name="com.your.package.name.YourActivity"
      android:label="@string/app_name">
       <intent-filter>
           <action android:name="android.intent.action.MAIN" />
           <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
   </activity>

If not present, add it

If the above is present, but still you see default activity not found, follow these steps:

1. Click edit configuration

   

2. On clicking edit configuration you’ll see that the launch option is set on DEFAULT ACTIVITY

   

3. Change it to nothing.

   

Problem solved!

Note

Please make on the root of the manifest file you should have the package name

        <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
        package="com.package.name">

answered Nov 1, 2018 at 8:22

answered Nov 23, 2018 at 6:53

Exit Android Studio.

Go to path C:UsersYOUR_WINDOW_USER_NAME.AndroidStudio3.3system

Remove the /caches folder and the /tmp folder.

As this question is a «landing page» for plethora of issues with manifests, resulting in no Default Activity found, here is another thing to check if you are having this problem.

Open your manifest and switch to Merged Manifest tab.

Sometimes the issue is related to merging all the manifests in the project to one, which can result to error and therefore «Default Activity not found». The problem is this error is not shown anywhere except this Merged Manifest tab as far as I know.

For example: in a project minSdkVersion 10, downgrade the version of implementation in build.gradle file: from 25.4.0 to 25.3.1 solve this problem.

dependencies {
    implementation 'com.android.support:appcompat-v7:25.3.1'
    implementation 'com.android.support:design:25.3.1'
    implementation 'com.android.support:mediarouter-v7:25.3.1'

I changed my Intent-filter to

<intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.DEFAULT"/>
    <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

Just add the DEFAULT option as well. I was using the Process Phoenix library and it prompted me to define a default intent. This addition solved my problem.

This occurred to me after my PC restarted unexpectedly. Strangely, I had made no changes and still got this error.

None of the above helped me. What solved my problem, was this.

Step 1:

Step 2:

Step 3:

If this doesn’t solve the problem give other tries.

Try 1:

Menu File → Invalidate Caches / Restart…

Try 2:

Check whether the following two lines,

<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />

are in your launcher activity declaration in file manifest.xml.

<activity
        android:name="com.your.package.name.YourActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
</activity>

Try 3:

1. Click as shown:

   

2. Run / Debug Configurations opens.

   

If this doesn’t help either:

Try 4:

1. Menu File → Export to ZIP.

and

1. Import it as a new project.

answered Jan 15, 2018 at 7:44

answered Sep 21, 2015 at 15:27

All previous answers didn’t help me.

Try to remove

<?xml version="1.0" encoding="utf-8"?>

in your AndroidManifest.

Then menu File → Sync Project with Gradle Files.

blackblack

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I found this in my code:

<context android:name=".MainActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</context>

If you look very carefully, it should be <activity android:name=".MainActivity"> instead.

Apparently, I refactored an «activity» somewhere, and it changed names in the AndroidManifest as well.

answered Dec 8, 2016 at 9:16

In my case I refactored a member variable that was named «activity». I renamed it to «context»…

I found out that the refactor was made to the activity tags in the manifest, and I found them to be context tags instead… this is really stupid from Android Studio side!

answered Jul 7, 2014 at 10:34

answered Jul 13, 2018 at 11:29

Sync Project With Gradle Files works sometimes.

To fix this overall issue you should:

1. Exit Android Studio
2. Go to folder USER → AndroidStudio → system → caches
3. Delete that folder
4. Start Android Studio.

It will re-index your files and that should work.

Thanks to kirtan403 from a similar question.

answered Mar 24, 2020 at 17:21

In my case, there was a typo in AndroidManifest.xml as shown below. Removing the «o» letter above the application tag solved it.

Apparently, Android Studio doesn’t detect type errors in AndroidMainfest.xml

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

o
<application android:name=".AppName"
             android:allowBackup="false"
             android:icon="@drawable/ic_launcher"
             android:label="@string/app_name"
             android:theme="@android:style/Theme.Light.NoTitleBar">

Error: Default Activity Not Found

I solved it this way:

Run → Edit Configuration → Android Application → *enter the path of your default activity class in the «Launch» Edit Box.

21 июн. 2023, в 21:40

2000 руб./в час

21 июн. 2023, в 21:22

600 руб./за проект

21 июн. 2023, в 21:21

600 руб./за проект