Develop Reference

Android App not installed with USB debug

I have a problem when I try to debug the App on my Phone. The App works, but It is not installed on the device. When I created the project I selected a project without Activity (option: "Add No Activity"). If I create an App with a blank Activity, this is installed when I launch the debug. I'm using Android Studio for the project.
What can I do? Thanks!

Because you have to Specify Your App's Launcher Activity. You should put this line into your manifest in actvity tag like this, For more reference check this link Specify Your App's Launcher Activity
<activity
android:name=".DemoActivity"
android:label="#string/app_name"
android:windowSoftInputMode="adjustResize|stateVisible" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.categor.LAUNCHER" />
</intent-filter>
</activity>

Problem solved!
Android Studio is stupid, it adviced me to write this in capital letters
<action android:name="ANDROID.INTENT.ACTION.MAIN" />
<category android:name="ANDROID.INTENT.CATEGORY.LAUNCHER" />
instead
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />

Android studio manifest issue

My android studio seems to be not detecting AndroidManifest.xml file. When I try to run the app, configuration says that Default Activity not found, but in my manifest there is activity tag with necessary intent-filter:
<activity
android:name=".ui.MainActivity">
<intent-filter>
<action android:name="ANDROID.INTENT.ACTION.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
AndroidManifest.xml is located at app/src/main where it was initially created. Cleaning build, rebuilding, invalidating caches / restart does not help.

Names are case sensitive. Use:
<action android:name="android.intent.action.MAIN" />
If that still doesn't work try to provide the full path to your activity e.g.:
<activity
android:name="com.example.package.ui.MainActivity">

Launch a Library Activity From Project Manifest

Hi I have an activity defined in my Library like so...
<activity
android:name="com.company.application.corelibrary.recording.DesiredActivity"
android:label="#string/title_activity_tracking"
android:screenOrientation="portrait"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
I then want to use this library to launch with in another application which I am doing like so...
<activity
android:name="com.company.application.corelibrary.recording.DesiredActivity"
android:label="#string/title_activity_tracking"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
However when I am going to build it it comes back with...
[2013-02-27 12:41:33 - TestApplication] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.company.application/.corelibrary.recording.DesiredActivity }
[2013-02-27 12:41:33 - TestApplication] ActivityManager: Error type 3
[2013-02-27 12:41:33 - TestApplication] ActivityManager: Error: Activity class {com.company.application/com.company.application.corelibrary.recording.DesiredActivity} does not exist.
com.company.application is my project package.
com.company.application.corelibrary is my library package.
I have included the library in my project.
What am I doing wrong?
ADDITION
I just renamed my library project's package name to something different than that of my project as I thought maybe as they were similar the project may look in it own source for the class but this did not work either.

in my application, i have wrote activity in manifest like:
<activity android:name="MainActivity"
android:label="#string/app_name"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
i have also declare another activity (which activity belongs to my library) in the manifest as:
<activity android:name="com.facebook.LoginActivity"
android:label="#string/app_name" />
hope this will help u.
N.B:
u should not use
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
for two activity in a manifest.

I thought I would answer my own question. The other answers may be valid but this is what solved mine.
Before my activity declaration in the new projects manifest I had the following which was causing issues.
<uses-library
android:name="com.corecoders.st.corelibrary"
android:required="true" />
I removed that, cleaned and rebuilt the project and it launched fine.

I have solved this issue by implemeting he solution io.card does in their library. By wrapping with the application tags the activities into your library manifest.
<application>
<activity
android:name="com.eckoh.eckohroute.ActionConsumingActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:theme="#style/Theme.Dialog.ActionActivity" />
</application>

No Launcher activity found, The launch will only sync the application package on the device

I got this warning from console when running my application on emulator
No Launcher activity found!
The launch will only sync the application package on the device!
In fact i have declared an activity as the main launcer in AndroidManifest.xml file
<activity
android:name=".myActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
I don't need any other intent-filter to use on that activity.. just basic main and launcher
What's the reason? Please give me a solution..

If the launcher activity is in another package, you will need to specify that as well.
For instance, from one of my personal projects:
<activity
android:name=".activities.MainScreen"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
The MainScreen.java is in the activities package. Also, check spelling for upper or lower case letters.

It seems that you must have "android.intent.action.MAIN" specified immediately before "android.intent.category.LAUNCHER". I encountered the same issue as you when I had the following:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SEARCH" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
The issue was resolved only when I re-orderd as follows:
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

In all normal circumstances, listen to what the other guy(s) said.
I was able to replicate your issue using a Mac Book Pro & Eclipse Indigo. when you create your android project, you MUST have Eclipse start you off with a templated activity (like a blank activity). if you don't, and you try to add an activity to your manifest later, Eclipse just derps and can't find the launcher. (i looked at other manifest files and i can't see any differences. i really don't think it's your poor manifest's fault in this special case.)
here's your lazy easy fix:
start a new project, and copy over all the files (make sure you back up ur files first, in case you delete something wrong or mess up the ordering)

Using Eclipse Indigo, open Run Configurations windows, click the project and use launch default activity on Android tab, choose Automatically pick compatible device...and apply.

No Launcher Activity found with .Launcher in Manifest.xml already included?

I am trying to run a source code I've found online for android. When I run it, it gives me:
No Launcher activity found!
The launch will only sync the application package on the device!
Performing sync
I already have in my Manifest.xml the following:
action android:name="android.intent.action.MAIN"
category android:name="android.intent.category.LAUNCHER"
What could be wrong? The weird thing is that it worked once. And then when I ran it again it gave me needs to force the application.
It is not a duplicate question because I've read that everyone is suggesting to place those in the Manifest.xml.

I think you need to define a launching activity. For example in my app
<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>
I have defined which activity is started on app start.

please make sur to add android:exported="true" it will be like that
<activity android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>