Question

If on run/debug configuration, if I specify a launch activity, then my app runs fine, but when I select ‘Launch Default Activity’ I get “No Launcher activity found!” error from android adb despite the fact that I have specified the launch activity in my manifest file. I’m using android 2.1.

I’ve tried refreshing the file/project, clean and rebuild, deleting the file and re-writing it, creating a new project and copy/pasting all the code across and doing Android Tools -> Fix Project Properties. I’ve tried Android Tools-> Rename Application Package, which prompts me to update the project launch configuration (to which I say yes, but it still doesn’t fix the problem).

I’ve also tried different devices. My Home activity extends another activity and is in its own Home.java file in my src folder. This is what my manifest file looks like:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.geogreenweb.localvore"
  android:versionCode="1"
  android:versionName="1.0">

<application 
    android:icon="@drawable/icon" 
    android:label="@string/general_app_name" 
    android:debuggable="true">

    <meta-data android:name="android.app.default_searchable"
           android:value=".localvorebeta6" />

    <activity android:name="com.geogreenweb.localvore.Home" 
              android:label="@string/general_app_name">

              <intent-filter>
              <action android:name="android.intent.action.MAIN" />
              <category android:name="android.intent.category.LAUNCHER" />                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>


    </activity>

    <activity android:name="com.geogreenweb.localvore.Quit" 
              android:label="Quit">

    </activity>

    <activity android:name="com.geogreenweb.localvore.InSeason" 
              android:label="In Season">
              <intent-filter>                
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.List" 
              android:label="A - Z">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.Local" 
              android:label="Local"
              android:configChanges="orientation"
              android:windowSoftInputMode="stateHidden">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.Details" 
              android:label="Details">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.Search" 
              android:label="Search">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.Map" 
              android:label="Map"
              android:windowSoftInputMode="stateHidden">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>

    <activity android:name="com.geogreenweb.localvore.Help" 
              android:label="Help">
              <intent-filter>                  
              <action android:name="android.intent.action.SEARCH" />
              </intent-filter>
              <meta-data android:name="android.app.searchable"
               android:resource="@xml/searchable"/>

    </activity>


</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />    
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk android:minSdkVersion="7" />
</manifest>

UPDATE: I changed one of the activity labels, and the different label appears in the app, so the changes to the manifest file are being picked up, but still I get the No Launch Activity error

UPDATE 2: I managed to solve the problem by creating a new project in the end, but only if I select the option to create an activity when making the new project, then copy/paste in the rest of the stuff into the project

Answer 1

if you remove the :

<action android:name="android.intent.action.SEARCH" />

it will launch normally.
i don’t know why .. it just worked for me. i’m still searching why?!!

UPDATE 1:
i found this:

No Launcher activity found, despite being declared in manifest.xml
still don’t know why? .. still searching for it.

UPDATE 2: GOT IT!

http://developer.android.com/guide/topics/intents/intents-filters.html

A filter has fields that parallel the action, data, and category fields of an Intent object. An implicit intent is tested against the filter in all three areas. To be delivered to the component that owns the filter, it must pass all three tests. If it fails even one of them, the Android system won’t deliver it to the component — at least not on the basis of that filter. However, since a component can have multiple intent filters, an intent that does not pass through one of a component’s filters might make it through on another.

in our case this means that the system sends an intent with the MAIN action and LAUNCH category. it finds an with the following:

1. MAIN action …………..[ pass ]
2. LAUNCH category …. [ pass ]
3. SEARCH action ………[ fail ]

but .. if you put the SEARCH action in another , the containing the MAIN and LAUNCHER criteria passes.