“Default Activity Not Found” on Android Studio upgrade

Question

I upgraded IntelliJ Idea from 12.0.4 to 12.10.

Now all the modules in my Android project give the error:

Error: Default Activity Not Found

Answer 1

Nothing above helped me. After some time I found that 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 default activity:

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

Answer 2

In my case File -> Invalidate Caches / Restart... didn't help

Everything was ok with my project and of course I had next intent filter for my activity

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

What really helped me is deleting Android/Gradle cache folders (they can grow up to 10-30 GB)

Go to C:\Users\YOUR_USER_WINDOWS_NAMEand delete next folders

• .android
• .AndroidStudio3.2
• .gradle

(you may save some Android configs from .AndroidStudio3.2 before deleting it if you want it)

You can create bat file CLEAR_CACHE.cmd like this to delete folders without Recycle Bin

rmdir /S /Q .android
rmdir /S /Q .AndroidStudio3.2
rmdir /S /Q .gradle

it would work much faster and you don't have to delete it also from Recycle Bin

p.s. put CLEAR_CACHE.cmd into C:\Users\YOUR_USER_WINDOWS_NAME

it's also a good idea to delete Android Studio folder and download it again

Answer 3

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 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.

Answer 4

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, is this.
Step 1:


Step 2:


Step 3:

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

Try 1:

File -> Invalidate Caches / Restart...

Try 2:
check whether these following two lines

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

are in your launcher activity declaration in 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 also doesn't help.
Try 4:

1. File->Export to ZIP.
   and
   
2. Import it as new project.

Best luck.

Answer 5

100% working

You must be seeing this

First open your manifest and check if this 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 launch option is set on DEFAULT ACTIVITY

3. Change it to nothing.

Problem solved!

Happy Coding.

Answer 6

@TouchBoarder almost had it. Although selecting "Do not launch Activity" results in nothing launching.

In Android Studio under Run/Debug Configuration -> Android Application -> General -> Activity -> select the option "Launch:"

Choose your Activity. This doesn't exactly fix the intended behaviour but rather overrides it correctly.