Develop Reference

Android app with 2 launcher icons with separate taskAffinity

I have app with 2 launcher icons and 2 different Activities. Manifest file is as like below:
....
<activity
android:name=".MyActivity"
android:label="#string/app_name"
android:icon="#mipmap/ic_launcher"
android:taskAffinity="my.package.com.MyActivity">
<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>
</activity>
<activity
android:name=".MySettings"
android:label="#string/settings"
android:icon="#mipmap/ic_launcher"
android:taskAffinity="my.package.com.MySettings">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
....
I want MyActivity to be default screen to be opened after installing, so i used .category.DEFAULT.
action.MAIN and category.LAUNCHER are to show two separate launcher icons (1 for MyActivity, 1 for MySettings).
Problem: When i open MyActivity, MySettings screen is also gets opened. I want each launcher icon to open its corresponding Activity only. I have used taskAffinity for each Activity to solve problem but it did not work. I think to make taskAffinity work, Activity must be started with flag Intent.FLAG_ACTIVITY_NEW_TASK which i can not in my case (both are launch Activities).
I have also tried to use android:launchMode="singleTask" but it did not work either.
How to make each launcher icon to open only its Activity ?
UPDATE: Sorry, i realized MyActivity does not open MySettings, it seemed so though. MyActivity did not have UI, so it showed blank screen which is similar to MySettings. taskAffinity works correct. I have added android:theme="#android:style/Theme.NoDisplay" to MyActivity to hide UI.

Just use two different images for your apps to launch.
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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=".MySettings"
android:label="settings"
android:icon="#drawable/ic_launcher2"
android:taskAffinity="my.package.com.MySettings">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

I solved that way:
<activity
android:name="andynaz.android.hyperfcalc.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="andynaz.android.hyperfcalc.MainActivity2"
android:label="#string/app_name"
android:icon="#mipmap/ic_launcher2">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
I did not use the taskAffinity, but I indicated the fully specified name of Activity classes (other than using 2 different images).

Merging android manifest files, conflicting filter

I'm trying to combine android manifest files from 2 plugins in Unity, but there are two activities with the same intent-filter and I can only get 1 or the other to work at the same time....
Of the 2 conflicting activities, whichever is on top in the manifest file is the one that will work. So if activity from manifest #1 is on top, plugin #1 will work but not #2, and vice versa.
The two conflicting activities are:
<activity
android:name="com.devfo.andutils.DevfoUnityPlayerActivity"
android:label="#string/app_name"
android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
And:
<activity android:name="com.qualcomm.QCARUnityPlayer.QCARPlayerProxyActivity"
android:label="#string/app_name" android:screenOrientation="portrait"
android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
is there any way I can merge the two and get them to work from the same app? I'm using Unity 3d.

For example in the manifest where you want to use only the first activity as launcher you have to add this 2 modifications:
At the beginning of the manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
And for the activity for which you want to remove the intent filter add this code:
<activity android:name="com.qualcomm.QCARUnityPlayer.QCARPlayerProxyActivity"
android:label="#string/app_name" android:screenOrientation="portrait"
android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
<intent-filter tools:node="removeAll">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
The important part is to add the tools:node="removeAll" attribute in the intent-filter tag

Declare your manifest header like this:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
And then add one of the following appropriate attributes to the relevant Activity(s):
tools:merge="override"
tools:merge="remove"

Slightly different to #amarkovits answer, I've found success with:
<activity android:name="com.qualcomm.QCARUnityPlayer.QCARPlayerProxyActivity"
android:label="#string/app_name" android:screenOrientation="portrait"
android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen"
tools:node="merge">
<intent-filter tools:node="remove"> ...
which I believe will try to merge it first, then replaces just the intent filter causing both Icons on the launcher screen

The Activity that has this intent-filter:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
is the main Activity that will start on application start up, you can't make both activities work at the same time.
what you should do is let only one Activity ( your main one have this filter) and leave the other one without it.
the second Activity will also be part of the application, but it will not be the first Activity you will see. You can start it by using the startActivity() method.

I have done this, the solution is that when you have multiple flavors, like
1. flavorA,
2. flavorB
and main application id is - com.android.vivek
and main flavorA is using com.android.vivek
and second flavorB is using com.android.vivek.flavorb
flavorA's manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.android.vivek">
<application xmlns:tools="http://schemas.android.com/tools"
android:allowBackup="true"
android:icon="#mipmap/flavorA_ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:replace="android:icon" />
<activity
android:name=".ActivitySplash"
android:label="#string/app_name"
android:launchMode="singleTop"
android:screenOrientation="portrait"
tools:node="replace">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
then simply flavorB's manifest mention like below
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.android.vivek">
<application xmlns:tools="http://schemas.android.com/tools"
android:allowBackup="true"
android:icon="#mipmap/flavorB_ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:replace="android:icon" />
<activity
android:name=".flavorB.SecondActivity"
android:label="#string/app_name"
android:launchMode="singleTop"
android:screenOrientation="portrait"
tools:node="replace">
<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>
</activity>
<activity
android:name=".ActivitySplash"
android:label="#string/app_name"
android:launchMode="singleTop"
android:screenOrientation="portrait">
<intent-filter tools:node="remove">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
when you run flavorA or flavorB then it will work fine

App is installed and has two icons

I made a android app and it worked very well, but there are two icons in my device screen. I think it could be a AndroidManifest problem. Any idea what it could be?
This my AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pk.aeh.ideos.taa"
android:versionCode="1"
android:versionName="1.0" >
<application
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar" >
<activity
android:name=".Ghinho_congviecActivity"
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="Nhap_congviecActivity"></activity>
<activity android:name="Sua_congviecActivity"></activity>
<activity
android:name=".Quizzes"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".PlayGame" />
<activity android:name=".Result" />
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

This could be because you have declared two activities as MAIN and LAUNCHER
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
in your Androidmanifest.xml file. You need to have only one activity with these intent filters so that when the app is installed the system will know which activity is to be used as the main launcher activity.

It is. You have two of these:
<category android:name="android.intent.category.LAUNCHER" />
Get rid of the one you don't want.

You need to make these changes to your Manifest.xml
<activity
android:name=".Ghinho_congviecActivity"
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="Nhap_congviecActivity"></activity>
<activity android:name="Sua_congviecActivity"></activity>
<activity
android:name=".Quizzes"
android:launchMode="singleTask">
</activity>
I am assuming that the Activity with the attribute android:label="#string/app_name" might be your main activity.

It could be because you have changed your package name and installed it twice with different package names.

Remove the intent filter of one the activity and it would work perfectly.!

Your manifest file should only have one activity with below Intent Filter, Activity which you want to have an icon:
<intent-filter>
<action android:name = "android.intent.action.MAIN" />
<category android:name = "android.intent.category.LAUNCHER" />
</intent-filter>
Based on your description, it sounds like two activities have this line. Check your Manifest...

You can declare only one Intent filter in the activity, on AndroidManifest.
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
If you used two or more intent filter in AndroidManifest, then you will have display 2 app icon, So remove it & set one intent filter.
I hove this is usedful to you.

How to change the application name in android

In my project when application is get installed it naming the app name as {#string/welcome_msg} not {#string/app_name}. Is there any way to make the application name not same as Main Activity label?
Below is my manifest code:-
<application android:theme="#style/AppTheme" android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".StartActivity" android:label="#string/welcome_msg">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".LoginActivity" android:label="#string/login">
<intent-filter>
<action android:name="com.gymup.project.LOGINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>

Change the label in your manifest to the app's name, then in your code use
this.setTitle( R.string.lable );
on onCreate(..)

You're avoiding the real question here:
How to get ride of title bar?
Answer:
In activity entry of manifest:
android:theme="#android:style/Theme.NoTitleBar"

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.