Develop Reference

Android - launcher icon doesn't reappear after manual uninstall

The launcher icon of my app is not showing on any homescreens of my device, even though it's running. Going into app info, I can see that it is displaying the correct launcher icon.
My AndroidManifest.xml looks as follows:
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher_round"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".Activities.SelectRoomScreen"
android:screenOrientation="landscape"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<category android:name="android.intent.category.HOME" />
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
</activity>
</application>
Screenshot of mipmap
Screenshot of where it should appear next to My Application
As far as I can see, it should work. I've also tried adjusting the intent filter (removing any line except NDEF_DISCOVERED, HOME and LAUNCHER) but I'm either given an error or nothing is changing. What am I not seeing?
Thanks in advance!

In your manifest file, roundIcon is missing
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<application
android:allowBackup="true"
android:icon="#mipmap/logo"
android:label="#string/app_name"
android:roundIcon="#mipmap/logo"
android:supportsRtl="true"
android:theme="#style/Theme.Note">
<activity android:name=".activity.NoteActivity"></activity>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".activity.SettingsActivity"></activity>
</application>

Android app opens app info screen on launch instead of launching main Activity

I am not sure if it is an issue, but this is the first time I ran into it.
I am halfway through developing an app. When I disconnect my app from Android Studio and my PC after some coding stuff, if I try to open my app on my phone, it launches app info screen (screen where we see force stop, clear memory) instead of launching my main activity and I couldn't use the app. And when I relaunch my activity by connecting with Android Studio, it works fine.
I worked on other apps too but did not encounter something like this.
Here is the code from my app manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.meanings_downloader">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:requestLegacyExternalStorage="true"
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=".Music_Activity"></activity>
<activity
android:name=".SettingsActivity"
android:label="#string/title_activity_settings" />
<activity android:name=".settings" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SEND" />
<data android:mimeType="*/*"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".Music" >
<intent-filter>
<action android:name="android.media.browse.MediaBrowserServic"/>
</intent-filter>
</service>
</application>
Is it an issue or am I doing something wrong ?

Your intent filter is set up incorrectly, meaning that it's not matching the filter for a launcher activity. You probably meant to create two different intent filters, i.e.,
<intent-filter>
<category android:name="android.intent.category.LAUNCHER"/>
<action android:name="android.intent.action.MAIN"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND"/>
<data android:mimeType="image/*"/>
</intent-filter>

Android manifest merging: removing LAUNCHER intent-filter doesn't take effect

In my android app I use a library project and I use one of it's activities. However in the library project that activity has MAIN action and LAUNCHER category intent-filter. So I added that activity to my manifest and removed the intent-filter. The manifests seem to be correctly merged into build/intermediates/manifests/full/debug/AndroidManifest.xml, and the activity looks as expected (without the intent-filter):
<activity
android:name="com.michaelrnovak.util.logger.Logger"
android:configChanges="orientation"
android:label="#string/show_log" >
</activity>
However when I start the app from AndroidStudio in the emulator, then instead of my AlertsActivity, the library's Logger activity is launched. What am I doing wrong?
This is the manifest of the library:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.michaelrnovak.util.logger"
android:versionCode="8"
android:versionName="1.5">
<uses-permission android:name="android.permission.READ_LOGS" />
<application
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<activity android:name=".Logger"
android:label="#string/app_name"
android:configChanges="orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="7" />
</manifest>
and my app's manifest has the following relevant activity definitions:
<activity
android:name=".AlertsActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:launchMode="singleTop" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" /> </intent-filter>
</activity>
<activity android:name="com.michaelrnovak.util.logger.Logger"
android:label="#string/show_log"
android:configChanges="orientation"
tools:replace="android:label"
>
<intent-filter tools:node="removeAll" />
</activity>

Have you tried tools:node="remove" on the category node only? From my experience, it seems to work.
Something like this:
<activity android:name="com.michaelrnovak.util.logger.Logger"
android:label="#string/show_log"
android:configChanges="orientation"
tools:replace="android:label"
>
<intent-filter>
<category tools:node="remove" android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>

I tried many ways on similar situation like you. I figured out that I must add tools:node="replace" in the Activity node to remove intent-filter's specific action and category. Try this :)
<activity
android:name="com.michaelrnovak.util.logger.Logger"
android:label="#string/show_log"
android:configChanges="orientation"
tools:replace="android:label"
tools:node="replace">
<!-- Rewrite the intent-filter you want -->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

exported apk showing activities when installed

I have exported an app with 3 activities (main, splash and another activity called "about") to an apk file. It works fine when tested on the emulator. After uploading to the Play Store and then downloading to my own phone, it installs fine on my phone. Good so far. However, the apk doesn't appear packaged - it's showing the separate activities and not starting with the splash screen as it did in the emulator. What could be the problem? It exported with no errors. When I was exporting, I gave the apk a name that was different than the package name in the manifest. Would this cause the problem? Here is the manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.spinner"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar" >
<activity
android:name=".SplashActivity"
android:label="#string/title_activity_splash" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".AboutActivity"
android:label="#string/title_activity_about" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Thank you for looking.

This intent-filter
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
tells Android launcher app to show icon associated with Activity this filter is attached to on its Launcher screen. When corresponding icon is tapped by user, launcher app starts that activity and your code is executed. You usually want one entry point in your application so edit your Manifest file and ensure only one Activity element uses it. In your case, I guess leave it for SplashActivity and remove from others. It should look like this:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.spinner"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar" >
<activity
android:name=".SplashActivity"
android:label="#string/title_activity_splash" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
</activity>
<activity
android:name=".AboutActivity"
android:label="#string/title_activity_about" >
</activity>
</application>
</manifest>
I'd also get rid of android:label from <activity> elements (just leave for <application>)

Android: No Launcher activity found! was working before

I have the same problem everyone reports but this began happening suddenly. My app was working as expected, automatically launching the MAIN activity.
But all of the sudden it stopped working and I started seeing the No Launcher activity found! message.
This is my Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.xitrica.android">
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk android:minSdkVersion="8" />
<application android:icon="#drawable/icon" android:label="#string/app_name"
android:theme="#style/Theme.Transparent">
<uses-library android:name="com.google.android.maps" android:required="true" />
<activity android:name="ElBusetonActivity" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="andoid.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="RouteInfoActivity"></activity>
<activity android:theme="#android:style/Theme.Translucent.NoTitleBar"
android:name="GetDirectionsActivity"></activity>
<activity android:theme="#android:style/Theme.Dialog"
android:name="PointProviderList"></activity>
</application>
</manifest>
Sorry if I'm not posting this snippet correctly. It's the first time I ever post a question.
Thanks in advance.

<activity android:name=".ElBusetonActivity" android:label="#string/app_name">
try this, prefix (".") on activity name
here (.) refer to package path

Remove
category android:name="android.intent.category.DEFAULT"
as it is not required.

Say if you have the Activity names TestActivity
If you want the TestActivity to be the first to launch when you hit "run", simply add two lines:
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
To the position like below in your AndroidManifest.xml:
<activity
android:name="TestActivity"
android:label="#string/name"
android:screenOrientation="portrait" >
<intent-filter android:label="#string/app_name" >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

use the dot before the activities in your manifest to declare it. or you can write the package name dot your activity name.
like this.........
<activity android:name=".ElBusetonActivity" android:label="#string/app_name">
if you not using package name then it decide the default one.