I'm in the process of making a Launcher app, but I can't get my app to show up in the activity chooser when the home button is pressed. I'm sure I'm just missing something simple, but I can't find it! Here's my manifest file:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.espian.jump"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="17" />
<application
android:label="#string/app_name"
android:icon="#drawable/ic_launcher">
<activity
android:name="JumpActivity"
android:label="#string/app_name"
android:theme="#android:style/Theme.Holo.NoActionBar"
android:launchMode="singleTask"
android:clearTaskOnLaunch="true"
android:stateNotNeeded="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Try replacing that
<category android:name="android.intent.category.LAUNCHER"/>
with
<category android:name="android.intent.category.DEFAULT"/>
As it says in the android intent filter documentation:
activities that are willing to receive implicit intents must include
"android.intent.category.DEFAULT" in their intent filters
Actually I'd suggest opening that page and searching for that text, and having a little read around it. I think you'll find these categories make a lot more sense if you do. You're specifying that this appears in the launcher instead.
I just created my first Android app, all works fine, but all of the activities are shown on my Android menu. What did I do wrong?
Screenshot: imgur.com/9CmXU
I want to have one icon, directing to MainActivity, not all activities
<!-- language-all: lang-html -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myApps.birthdaymeter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/my_logo"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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=".BirthdayMeter"
android:label="#string/title_activity_birthday_meter" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".AboutWindow"
android:label="#string/title_activity_about_window" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ShowResult"
android:label="#string/title_activity_show_result" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
This is my manifest, changing logo didn't help
The <intent-filter> tag is used to describe the type of Intents that each Activity will respond to. The "android.intent.action.MAIN" action says that this Activity is an entrance point for your Application (think the main method that a java program requires). The "android.intent.category.LAUNCHER" category tells the OS to display the Activity in your list of Applications. Adding the DEFAULT category is ok, but effectively the same as omitting the <intent-filter> tag completely (which I find to make for much cleaner and easier to read code). You should only be using the <intent-filter> tag with these two actions and categories on the Activity that starts when a user opens your app. If wanted an Activity within your application to be able to respond to some special intents, you would use the tag to define which it responds to.
Here's a link to the google dev pages to help you learn more about Intent Filters.
http://developer.android.com/guide/components/intents-filters.html
Here's the documentation for the <intent-filter> tag. It's not the easiest to understand though.
http://developer.android.com/guide/topics/manifest/intent-filter-element.html
And here's the docs for the Manifest file and the Intent class. Both of these are good for reference if you're not sure about which tags to use in your Manifest. Good luck!
http://developer.android.com/guide/topics/manifest/manifest-intro.html
http://developer.android.com/reference/android/content/Intent.html
You phrased your question extremely generally, so I am not sure what to answer. It seems like you haven't called nameOfActivity.this.finish() when you launched another activity
If you post your manifest file I can help a little more, but it looks to me like you have not declared your activities correctly.
It should be setup somewhat like this:
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name="Activity1"></activity>
<activity android:name="Activity2"></activity>
<activity android:name="Activity3"></activity>
</application>
Essentially, create an application declaration, and then include each activity within it.
My application is never shown in the RECENT APPS list whenever I put the following piece of code in my activity's manifest entry
<category android:name="android.intent.category.DEFAULT" />
If I remove above line it works fine. I've also made sure that the following flags are set to false-
android:noHistory="false"
android:excludeFromRecents="false"
But still its never displayed even if I launch app manually.
In case anybody wants to have a look the manifest, its-
<?xml version="1.0" encoding="UTF-8"?>
<uses-sdk android:minSdkVersion="8" />
<application
android:name="com.raj.poc.copypaste.MainApplication"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".CopyPasteActivity"
android:launchMode="singleTop"
android:noHistory="false"
android:excludeFromRecents="false"
android:label="#string/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_LONG_PRESS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
It may also happen if you set
<activity... android:label=""/>
for your main Activity
This is the only activity in your application, right?
You are using the category tag twice. You have written in your code
<category android:name="android.intent.category.LAUNCHER" />
so you have already selected the category. When you add a new activity then you will write the Default category tag.
Hi custom url scheme is not working for me. Here is my code
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".MainActivity" android:label="#string/app_name"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.LAUNCHER" />
<data android:scheme="http" android:host="jinilabs.test" />
</intent-filter>
</activity>
</application>
when I type the url on the emulator browser - http://jinilabs.test
It is giving me web page not available error.
Is there anything wrong here? Plz let me know
Simply typing the URL into the bar won't do it. Your url needs to be a clickable link on a webpage because the browser method that checks if it's a custom url only fires when a link is clicked; it simply runs url's that are entered in the address bar(and ignores custom urls).
Clicking this link should launch your app as it is now. If it still doesn't work, you may need additional code in your manifest file. Mine looked like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="appcall.thing"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".AppCallActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="stoneware.app.switcher" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
</intent-filter>
</activity>
</application>
</manifest>
Of course, you will have to substitute some of the names in here for names relative to your app. I would also recommend starting your url scheme with something unique rather than http in case the http is confusing the browser. My url scheme, for example was stoneware.app.switcher://
Hopefully this can be of some use to you :)
Add this code to manifest file :
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
and then try.
I am writing a simple program of Android, and getting these no errors, I don't know what they are. My program is right, but showing not output.
I think it is because of these two lines:
[2005-01-06 19:56:38 - my_Android] No Launcher activity found!
[2005-01-06 19:56:38 - my_Android] The launch will only sync the application package on the device!
Here's an example from AndroidManifest.xml. You need to specify the MAIN and LAUNCHER in the intent filter for the activity you want to start on launch
<application android:label="#string/app_name" android:icon="#drawable/icon">
<activity android:name="ExampleActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Multiple action tags in a single intent-filter tag will also cause the same error.
Like Gusdor said above, "Multiple action tags in a single intent-filter tag will also cause the same error." (Give him the credit! I could just kiss Gusdor for this!)
I didn't find any docs for this fact!
I had added a new (USB) action and being clever, I lumped it in the same intent-filter. And it broke the launch.
Like Gusdor said, one intent filter, one action!
Apparently each action should go in its own intent filter.
It should look like this...
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
</intent-filter>
When I did this, WAZOO! it worked!
Do you have an activity set up the be the launched activity when the application starts?
This is done in your Manifest.xml file, something like:
<activity android:name=".Main" android:label="#string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Check your manifest.xml. Make sure you have the category LAUNCHER there.
<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>
It means you didn't specify an Activity for Android to launch as the default when the app opens from the launcher. You have to add an Intent Filter in the Manifest for the Activity you would like to act as the default when the app is being launched.
Read http://developer.android.com/guide/topics/intents/intents-filters.html#ccases for more details.
I fixed the problem by adding activity block in the application tag. I created the project using wizard, I don't know why my AdroidManifest.xml file was not containing application block? I added the application block:
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".ToDoListActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
And I get the desired output on the emulator.
As has been pointed out, this error is likely caused by a missing or incorrect intent-filter.
I would just like to add that this error also shows up if you set android:exported="false" on your launcher activity (in the manifest).
I had this same problem and it turns out I had a '\' instead of a '/' in the xml tag. It still gave the same error but just due to a syntax problem.
If you are using the standard eclipse IDE provided by google for Android development, you can check the "Launcher Activity" check-box while creating a new Activity. Please find below:
In Eclipse when can do this:
But it is preferable make the corresponding changes inside the Android manifest file.
You missed in specifying the intent filter elements in your manifest file.Manifest file is:
<application android:label="#string/app_name" android:icon="#drawable/icon">
<activity android:name="Your Activity Name"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Add and check this correctly. Hope this will help..
Manifest is case sensitive, so please compare this lines for any case mismatch especially the word MAIN in:
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
You can add launcher to activity in eclipse manifest visual editor:
MAIN will decide the first activity that will used when the application will start.
Launcher will add application in the application dashboard.
If you have them already and you are still getting the error message but maybe its because you might be using more than more category or action in an intent-filter. In an intent filter there can only be one such tag. To add another category, put it in another intent filter, like the following
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<!--
TODO - Add necessary intent filter information so that this
Activity will accept Intents with the
action "android.intent.action.VIEW" and with an "http"
schemed URL
-->
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<data android:scheme="http" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
just add this to your aplication tag in AndroidManifest.xml file
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
and also edit the uses-sdk tag from android:targetSdkVersion="16" to 17
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
You have not included Launcher intent filter in activity you want to appear first, so it does not know which activity to start when application launches, for this tell the system by including launcher filter intent in manifest.xml