Develop Reference

Android app can't run on real device, but does recognize it

I'm trying to write my first android app.
Eclipse does recognise my phone, but can't launch the app on it. The "OK" button can't be pressed.
Any idea?
Thanks
xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app1"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/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>
</application>
Solved.
The problem is with my phone.
I checked with another device and it was OK.
Thanks and sorry for botherring.

Check if your SDK is up to date using Android SDK Manager in Eclipse. If not update it. Install min sdk version and max sdk version package you want.
Check if OEM drivers for the respective device are installed on the PC and Developer options on the phone are activated. To know what are OEM drivers check this link
Lastly check for hardware loose connection in the USB wire and unplug and plug it again. :) :P

Android error: Application is not installed on your phone

I am getting this error when trying to install my exported unsigned application on tablet pc (running Android 4.04. version). App is normally installing and running in Android emulator in Eclipse. I tried removing and reinstalling it, but that didn't help either. Atached is my AndroidManifest.xml since problem is often there (but I can't see any duplicate code).
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hr.punctum.LociranjePonudaProizvoda"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="16" />
<application
android:label="#string/app_name"
android:icon="#drawable/ic_launcher"
android:theme="#style/AppTheme">
<activity
android:label="#string/app_name"
android:name=".ListaProizvoda" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="DetaljiProizvoda"></activity>
<activity android:name="GMapsActivity"></activity>
<uses-library android:name="com.google.android.maps" />
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>

The only thing suspicious I see is the uses-library tag, do you have the Google Maps lib in your tablet? (if yes then you should have the following files in it)
/system/etc/permissions/com.google.android.maps.xml
/system/framework/com.google.android.maps.jar
Without the lib the apk installation will fail with INSTALL_FAILED_MISSING_SHARED_LIBRARY error.

Uninstalling Android Application

When I create an Android project in Eclipse and send it to my device for debugging, the app works fine but when I try to uninstall it, I get a strange message. Below are the steps to recreate my problem:
Eclipse Version: 4.2.0 Build id: I20120608-1400
ADT Version: 2.0.3 v201208082019-427395
Run Eclipse
Click File->New->Project...
Select Android/Android Application Project
Click Next.
Enter Application Name: Test
Build SDK: Android 4.1
Minimum Required SDK: API 8 Android 2.2
Enable: Create custom launcher icon / Create project in workspace
Click Next thrice.
Click Finish.
Connect 4.1 Android device to computer via USB.
Click Run->Run from menu.
Select "Android application" on popup the "Run As" popup.
Click Ok.
MainActivity application runs on device.
Click the Back button on the Android device.
Open applications on device and find "MainActivity" app.
Long press the MainActivity icon and drag to trash.
Here's the puzzling part:
Instead of getting a standard
Do you want to uninstall this app?
I get a dialog with this text:
MainActivity is part of the following app: Test
Do you want to uninstall this app?
Why do I get this message instead of the standard one?
Why is MainActivity the name of the app when I specifically stated the name of the app is "Test"?
Additional Information:
If I go to Settings->Apps, the Application shows up as Test but is listed in my Launcher as MainActivity.
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
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>
</application>

The solution is to remove android:label="#string/title_activity_main" in the activity element.
The AndroidManifest.xml below solves the problem on Android 4.1.1 .
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

Make sure your app name app_name is not styled.
Since I was using the app name somewhere else in the app I had made it bold, like this - In my strings.xml
<string name="app_name"><b>We are sons<b></string>
When I removed
<b></b>
tags, it worked.
Just keep it :
<string name="app_name">We are sons</string>

I do not know how to solve the first issue but the second can be solved in the following way. The problem is connected with Android new project wizzard. To solve this problem you can correct your manifest file in the following way and redeploy your project:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter android:label="#string/app_name" >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Do not forget to check what is the value of app_name. Some more details you can find in this post

How can I check my banner application on my actual android device that is it working correctly or not?

I have developed a simple application using SDK(Android: 3.2[API-13]) for, to display Google banners.
I have tow problems in this application.
Problem No.1:
I have checked the application it runs on emulator but how can i check it that it working correctly or not?
Problem No.2:
I want to run the application on my physical Android device using Android version 2.3.3. What changes I need to do in the application to run it on my Android device using Android version 2.3.3.?
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.farman.banner"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10"/>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".MyBannerActivity"
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="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
</manifest
>

Ans 1 :-You have to install it in the Device and Check it.
Ans 2 :-To Run it in the 2.3.3 version,you have edit the files as below:-
project.properties OR default.properties(Only 1 of the 2 may
be present in the root folder)
Here...Change the value of target=android-10
Androidmanifest.xml
Here...Check and Change the value of
<uses-sdk android:minSdkVersion="13" /> as <uses-sdk android:minSdkVersion="10" />
Now clean and run your application and it will run in 2.3 version.

Android app compatibility issue

I developed an android app. Its manifest is very simple and copied below.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.siddjain.jainaartis"
android:versionCode="1"
android:versionName="1" >
<uses-sdk android:minSdkVersion="7" />
<uses-configuration android:reqFiveWayNav="true" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".Main"
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=".DisplayForm"
class=".Aarti" >
</activity>
</application>
</manifest>
The Play store reports this app to be incompatible with many devices. Specifically, it reports it to be incompatible with Samsung GT-S5570 which is my phone. I installed the app onto my phone manually, and it works.
The developer console gives this message:
This application is only available to devices with these features, as defined in your application manifest.
Screen layouts: SMALL NORMAL LARGE XLARGE
Required device features
android.hardware.touchscreen
This application is available to over 266 devices.
The device availability dialog lists Samsung GT-S5570 as incompatible.
How can I fix the compatibility issue? What is there in my manifest that is causing the app to be classified as incompatible with Samsung GT-S5570? As mentioned earlier, I have checked the app works on my phone.
The specs of the phone are available here btw. It has a display resolution of 240x320 pixels and has Froyo (android v2.2.1)

Was able to fix this using following manifest (support for small screens has to be declared explicitly). The number of devices to which the app is available increased from 266 to 1272.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.siddjain.jainaartis"
android:versionCode="3"
android:versionName="1" >
<uses-sdk android:minSdkVersion="7" />
<supports-screens android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"/>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".Main"
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=".DisplayForm"
class=".Aarti" >
</activity>
</application>
</manifest>

Might be a carrier restriction. The play store filters apps via known information about your device (screen size, OS, carrier), but not if it can install and/or work or not. It would be a nightmare for development (and non play store apps) if you couldn't install because it checked compatibility.
How long ago did you add the app? If you just added it, it takes several hours for it to propagate and become available.
I see it uses 5 way nav. Does your application use this (I assume so) and does it work in your application?