Develop Reference

Not able to install my application on other Android devices

I have made an Android app using AndroidStudio and want to test it on different phones. I have generated the signed apk (release version) and I could successfully install the apk on my device (Nexus 5).
Then I tried to install the same apk on a Nexus 4 but it throws an error after the installation that the package installer has stopped.
Here is what my manifest file looks like
<?xml version="1.0" encoding="utf-8"?>
<application
android:permission="android.permission.WRITE_EXTERNAL_STORAGE"
android:allowBackup="true"
android:icon="#drawable/endecrypt_ico"
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=".PostSubmission"
android:label="#string/title_activity_post_submission"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.psimit.encrypt.MainActivity" />
</activity>
</application>
I am not able to understand where the problem lies. Since the app works when installed via the debugger and also using the apk on my phone, I am tempted to think if I need to do something more for compatibility across Nexus 4 and Nexus 5 during the generation of the signed apk.
I would quite appreciate some pointers if someone has encountered this problem earlier. Thanks in advance.

It's a really strange issue you have. Maybe you're doing things wrong.
The permissions should be at the root of the manifest tag :
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.app">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application>
<activity
...
</activity>
</application>
</manifest>

app won't open after downloading

some of my customers are having trouble opening their apps after downloading them. here is my last 1 star customer review:
'Only playable in play store using open/uninstall buttons. When select on phone app phone says app not installed. uninstalling.'
I'm getting a lot of 1 star ratings because of this and it's killing me. I also get some 5 star ratings so apparently this issue only affects some users. it works fine with my phone, but won't open on a friend's, unless she opens it from the store. I may have upgraded my targetSdkVersion from 16 to 19 recently.
here is my manifest, slightly edited for privacy, I've read of opening issues on another post being caused by bad manifest settings, but none of the suggestions related to my manifest settings:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mypackage"
android:sharedUserId="com.myshareduserid"
android:versionCode="300"
android:versionName="3" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="19" />
<supports-screens android:largeScreens="true"/>
<supports-screens android:xlargeScreens="true"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_USB" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
android:largeHeap="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:debuggable="false" android:permission="android.permission.WRITE_EXTERNAL_STORAGE">
<activity
android:name=".MyActivity"
android:label="#string/app_name"
android:screenOrientation="landscape"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|
uiMode|screenSize|smallestScreenSize">
<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>

This is just a bug in your client's launcher app.
You cannot do a thing about that.
It might be a badly made custom launcher, or a bug, but it's out of your hands.
If that user has access to a custom recovery, he could wipe dalvik and cache, it always worked for me in that case.

Unable to instantiate application - AndroidManifest settings

We have recently developed an Android app and published it via Google Play. First of all we created a beta test group, added members to it and got feedback etc from each and everyone of them. We had no problems publishing and installing this beta version on the users devices.
We promoted this beta version (API level 14+) to production and suddenly the app started to fail after installing with the following error:
java.lang.RuntimeException: Unable to instantiate application x.x.x.App:
java.lang.ClassNotFoundException: x.x.x.App
In the AndroidManifest file the name attribute of Application was the full packagename x.x.x.App. We changed this to be just the class name App and everything started to work smoothly.
However the customer decided to make the app compatible with API 10 - 13 and we made the changes to AndroidManifest file accordingly. We just changed the minSDK=10. Again we had the beta testing process with no further errors etc.
We then decided to promote this app to production and now we get the same error
java.lang.RuntimeException: Unable to instantiate application x.x.x.App:
java.lang.ClassNotFoundException: x.x.x.App
again when installing/upgrading to this new version.
What on earth is going on here - I need an explanation (if it exists) since I am not able to find any meaning of this?
EDIT: The manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.expatindenmark.adquota"
android:versionCode="8"
android:versionName="3.2" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_CALENDAR" />
<uses-permission android:name="android.permission.WRITE_CALENDAR" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:name="App"
android:allowBackup="false"
android:icon="#drawable/ic_launcher_hoejtid_ikon"
android:label="#string/app_name" >
<activity
android:name="com.expatindenmark.adquota.SplashActivity"
android:configChanges="locale"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:theme="#android:style/Theme.NoTitleBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.expatindenmark.adquota.AdquotaTabActivity"
android:configChanges="locale"
android:screenOrientation="portrait"
android:theme="#android:style/Theme.NoTitleBar" >
</activity>
</application>
</manifest>

As stated in an earlier comment I changed name = "App" to name = ".App" and that works.

Can't install APK correctly on device

I have built & sign my apk by Eclipse ADT as it is describes (export and sign by creating a new key). But it can't be install on real device while an errors occurs, such as "installer package error". I have no Android device & sent my apk to friends by email. I'm using AVD and everyth is fine with it. Any suggestions? Thanx guys.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.XXXX.YYYY"
android:versionCode="0"
android:versionName="0.9.2" android:installLocation="internalOnly">
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:hardwareAccelerated="true"
android:permission="android.permission.INTERNET"
android:allowBackup="true">
<activity
android:name="com.XXXX.YYYY.ActivityMain"
android:label="#string/main_activity_title"
android:launchMode="singleTop" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.XXXX.YYYY.ActivityDetails"
android:parentActivityName="com.XXXX.YYYY.ActivityMain"
android:excludeFromRecents="true"
android:configChanges="orientation|screenSize">
</activity>
</application></manifest>
UPD: apk installs good, but the error occurs if choose Open (see screenshot). After that app works fine. But on tablet if try open app it says "App deleted".
UPD2: add supporting API 4+ meta tag for the 2nd activity, but it takes no effect
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.XXXX.YYYY.ActivityMain" />

You probably need to make sure your device and your friend's devices can install apps that are not from the play store.
This is a feature you have to specifically set, or else apps that are outside the play store will not install.
Here is how to set it:
Open settings
Find the Security settings (Pre 4.0 it is under Applications)
Look for a setting that says Unknown sources, or non-market apps
Enable that setting
Everything should work after that!
Here is an article with pictures if you are still confused :)

Your example was missing the closing </manifest> and android:enabled. I'm not sure if the latter would prevent a device from fully installing it but the first one would.
I've also had issues using the full activity names in the past, so you may want to try using simplifying them to see if it helps.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.XXXX.YYYY"
android:versionCode="0"
android:versionName="0.9.2" android:installLocation="internalOnly">
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:hardwareAccelerated="true"
android:allowBackup="true">
<activity
android:name=".ActivityMain"
android:label="#string/main_activity_title"
android:enabled="true"
android:permission="android.permission.INTERNET"
android:launchMode="singleTop" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ActivityDetails"
android:parentActivityName=".ActivityMain"
android:excludeFromRecents="true"
android:configChanges="orientation|screenSize">
</activity>
</application>
</manifest>

Is "Unknown sources" option under "security" allowed on device?

My problem was a duplicate internet permission request on Manifest! When I remove that from activity app was run normally.

Confusion why a magic 1.6 user cannot find app on market

I've published an app today mainly for my forum users to use, just a
very simple app that displays wallpapers derived from the forum.
Problem I'm having is one guy says it doesn't appear in the market,
and I've even sent him the APK to install manually but it fails.
My minimum SDK version is 4, I created it with the 1.6 SDK specified
so not sure why he can't see it or install it. He has a 1.6 Magic
handset.
So just wondering if anyone has any ideas, the app is called bocn
wallpaper, it uses internet and set-wallpaper permissions.. but I
wouldn't have thought the permissions were the problem...
My manifest is as follows:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:versionCode="1"
android:versionName="1.0" package="net.dbws.bocnwallpaper">
<application android:icon="#drawable/launcher_icon"
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>
<meta-data android:value="xxxxx" android:name="ADMOB_PUBLISHER_ID" />
</application>
<uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.SET_WALLPAPER" />
</manifest>

Please, check the supported screens: http://developer.android.com/guide/topics/manifest/supports-screens-element.html
Android 1.6 has small-screens flag set default to false. May be it causes that the application is not seen on the device of the guy.