Develop Reference

Error running wear default device not found

I've created an android application and am now getting an "Error running wear, default device not found" error message. I can't think of anything I have done or changed that has made this start.
I have closed Android studio and re opened it
I've invalidated the caches and restarted
I've run a lint check
Looked at this question Android Studio cannot find default activity
Still no joy however.
My manifest is below
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.james.testing">
<uses-feature android:name="android.hardware.type.watch" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#android:style/Theme.DeviceDefault">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ScrollingActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SimpleGridActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Drinks"
android:label="#string/app_name"
android:theme="#style/Theme.AppCompat.DayNight.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Food"
android:label="#string/app_name"
android:theme="#style/Theme.AppCompat.DayNight.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Fitness"
android:label="#string/app_name"
android:theme="#style/Theme.AppCompat.DayNight.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</>
</manifest>

Try changing the theme to something basic for now and see if it works.

No Launcher activity found! - Android

I am getting a No Launcher activity found! error while launching my Andoid Application. My AndroidManifest.xml file has a LAUNCHER tag defined. I am not clear why I am getting this error though.
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.test.Menu"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.example.test.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.test.Class1"
android:label="#string/app_name">
</activity>
<activity
android:name="com.example.test.Class2"
android:label="#string/app_name">
</activity>
</application>
Can anyone advise the cause for this error ?

Replace
<action android:name="com.example.test.MAIN" />
with
<action android:name="android.intent.action.MAIN" />

How To set UP Activities in Manifest

<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".precus"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="com.yair.guessit.PRECUS" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="Customize"
android:label="#string/app_name"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="FirstPage"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="com.yair.guessit.MAINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
this is my manifest up there, and the app dont open .
can someone explain me how to set up the manifest with all the activites?
the precus is the first for now to open when the app open.
at the precus activity there is a intent that when the button get clicked its Customize activity.
why its not working?

change this line in your file
<action android:name="com.yair.guessit.PRECUS" />
to
<action android:name="android.intent.action.MAIN"/>
then run it.
if it work fine. then mark it as an accepted answer.

Your application has all Activities with intent-filter .Main... Let only one to have this filter, in others - just delete intent-filteres like...
<activity
android:name="FirstPage"
android:label="#string/app_name"
android:screenOrientation="portrait" >
</activity>

App Unable to Find Launcher Activity

I have just started to develop a brand new application and I have two Activities set up one which displays the Splash Screen and another the Main one. Here is the manifest file:
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Splash"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.SPLASH" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
I tried changing android.intent.action also removing the DEFAULT Category line from Main also placing the Splash Activity setup above main.

<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Splash"
android:label="#string/app_name" >
</activity>
</application>

Just realized the .MAIN in action and .LAUNCHER should be in the same activity , it's working now!

check this
Android: No Launcher activity found! was working before

no launcher activity was found even if i had declared one in the manifest

i declared the report file as my launcher. so its supposed to launch first when the app is started first. or do i get something wrong.
i get the error. no launch activity was found. thx guys
<activity android:name=".report" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.REPORT" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Main" android:label="#string/app_name">
<intent-filter>
</intent-filter>
</activity>

You need to change the action:name from .REPORT to .MAIN. The action name corresponds to the intent action and not to the Activity name.
Fixed version of the above:
<activity android:name=".report" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Main" android:label="#string/app_name">
</activity>