Develop Reference

Android Studio - Can't find app icon on TV homescreen

When I install my app using a file explorer on my tv, I can run it and everything but I do not know how to create an icon that will sit on the home screen of the tv
Here is my AndroidManifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sony.omgandroid" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity
android:name=".FullscreenActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:theme="#style/FullscreenTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

It utilizes the android:banner in the AndroidManifest on the application tag.
<application
android:name=".ExampleApp"
android:banner="#drawable/app_banner"
android:theme="#style/AppTheme"

You need add in AndroidManifest.xml file
android:banner android:icon android:logo and android.intent.category.LEANBACK_LAUNCHER
example:
<activity
...
android:banner="#mipmap/ic_launcher"
android:icon="#mipmap/ic_launcher"
android:logo="#mipmap/ic_launcher">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.LEANBACK_LAUNCHER" />
</intent-filter>
</activity>

Android showing error while running

i have 2 activities AndroidSlite.java and SqLiteAdapter.java.. my manifest.xml file is given below.it shows No launcher activity found .while running
please help me with the code
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cerebtec.androidsqlite"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<activity android:name="AndroidSQLite"></activity>
</application>
</manifest>

You have to enclose the intent filter around the launcher activity, in order to declare your launcher activity. E.g.
<activity android:name="AndroidSQLite"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
this way you are telling android that the launcher activity is AndroidSQLite

Use :
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

getting error No Launcher activity found! in creating a setting activity for a widget

in writing a widget and after i tried to add a setting activity for my widget , i got the error "No Launcher activity found!"
this is my AndroidManifest.xml :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.persianweather"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver android:name="com.example.persianweather.Main" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<!-- This specifies the widget provider info -->
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/widget" />
</receiver>
<activity
android:name="com.example.persianweather.SettingActivity"
android:label="#string/title_activity_setting" >
<intent-filter >
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
</intent-filter>
</activity>
</application>

No Launcher activity found! means that you not mentioned any activity on launching the application. Try to add these lines in manifest. To specify these MAIN and LAUNCHER in the the intent filter for the activity you want to start on launch like:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
Note: Multiple action tags in a single intent-filter tag will also cause the same error.

Make your SettingActivity as launcher activity, Only then you will be able to proceed further,
<activity
android:name="com.example.persianweather.SettingActivity"
android:label="#string/title_activity_setting" >
<intent-filter >
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

Android if my launcher has not started and pressing home button

I've developed a launcher. In my device, there are 3 launcher with my application and the default launcher of Android. If I have not launched my application before, when I press home, my application appears on the launcher list. So, when I touch my launcher, it occurs error because of I didn't start it before. What can I do to solve this problem?
My manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.comeks.deneme"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.comeks.deneme.Main"
android:label="#string/app_name"
android:screenOrientation="landscape"
android:excludeFromRecents="true" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:label="#string/app_name"
android:name=".main.java"
android:excludeFromRecents="true" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

What is the name of the file of your second activity?
main.java.java?
Do you even have two different activities?

Android manifest.xml problems

Following this: http://developer.android.com/training/basics/firstapp/starting-activity.html I am confused when editing the Android Manifest.xml file. It says that the file should contain this:
<application ... >
<activity android:name="com.example.myapp.DisplayMessageActivity" />
...
</application>
My android manifest.xml looks like this:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.nick.myfirstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="4"
android:targetSdkVersion="15" />
<application android:label="#string/app_name">
<activity android:name="com.nick.myfirstapp.DisplayMessageActivity" />
...
</application>
</manifest>
and when I run the app everything goes fine except it says : "No Launcher activity found!
The launch will only sync the application package on the device!" Is this something missing from the android manifest.xml file?

declare Your Activity in AndroidManifest.xml as for Showing In Launcher as:
<application android:label="#string/app_name">
<activity android:name="com.nick.myfirstapp.DisplayMessageActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
see for more info how we set an activity which so in Launcher :
http://developer.android.com/reference/android/content/Intent.html
http://developer.android.com/reference/android/app/Activity.html

You need to change you manifest to the following. Doing this will tell Android that you want this Activity to be displayed in the Launcher using your icon.
<application android:label="#string/app_name" android:icon="drawable icon resource here">
<activity android:name="com.nick.myfirstapp.DisplayMessageActivity" android:label="Your Label">
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
In the docs the used ... to show that your normal code goes here. What you're doing is fine for non-launcher Activities.

You are missing the launcher intent and therefore the app finds no activity to launch at the start.
You need to lay out the activity like so:
<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>

package="com.example.myfirstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.myfirstapp.DisplayMessageActivity"
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>