Develop Reference

Developing an app only for Tablets - how to?

I want to run my android app only on tablet , but it's running in phone also.
My Manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.sample">
<supports-screens
android:largeScreens="true"
android:normalScreens="false"
android:requiresSmallestWidthDp="600"
android:smallScreens="false"
android:xlargeScreens="true" />
<uses-feature
android:name="android.hardware.screen.landscape"
android:required="true" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme1"
tools:ignore="GoogleAppIndexingWarning">
<activity
android:name=".MainActivity"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Can we run the app in generic phones when we apply android:normalScreens="false" & android:smallScreens="false" in supports-screens tag in android manifest file

You can do this:
In your first activity use this and get the size of the screen
If the size is not a tablet size, make a alert that say this app is only to tablet, then show a white screen/ another thing

Unity 3d project apk file is getting installed but not running?

I deleted some textures and images, which i dont use from assets. And apk file which I build started to dont work. I can install to phone ( note 2 ) but it is not running. I can not see it in applications. only I can uninstall it.
I changed player settings and did not worked, I built for web and it works fine, I looked to android manifest xml and it is same with working apk which is old version.
Thank you for help.
my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:theme="#android:style/Theme.NoTitleBar" android:versionCode="1" android:versionName="1.0" package="com.unity3d.player" android:installLocation="auto">
<supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:smallScreens="true" android:xlargeScreens="true" />
<application android:icon="#drawable/app_icon" android:label="#string/app_name" android:debuggable="false">
<activity android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:label="#string/app_name" android:launchMode="singleTask" android:screenOrientation="reverseLandscape" android:name="com.unity3d.player.UnityPlayerActivity">
</activity>
<activity android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:label="#string/app_name" android:launchMode="singleTask" android:screenOrientation="reverseLandscape" android:name="com.unity3d.player.UnityPlayerNativeActivity">
<meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" />
</activity>
</application>
<uses-sdk android:minSdkVersion="6" android:targetSdkVersion="19" />
<uses-feature android:glEsVersion="0x00020000" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-feature android:name="android.hardware.sensor.accelerometer" />
<uses-feature android:name="android.hardware.touchscreen" />
<uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" />
<uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="false" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
</manifest>

Android App not supported on many devices

I cant find out why my app is not supported on many devices like Xperia Z or Samsung Galaxy S4 and many more. Especially the newest devices and tablets are not supported.
Here is my manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.baoss_CDB"
android:versionCode="3"
android:versionName="1.2.1" >
<supports-screens
android:anyDensity="true"
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:xlargeScreens="true"
android:resizeable="true"/>
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<application
android:name="com.baoss.Misc.MyApplicationContext"
android:icon="#drawable/cdb"
android:label="#string/app_name"
android:logo="#drawable/cdb"
android:theme="#android:style/Theme.NoTitleBar" >
<activity
android:name="com.baoss.LoginActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:windowSoftInputMode="stateHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.baoss.MenuActivity"
android:configChanges="keyboardHidden|orientation|screenSize" />
...
<activity
android:name="com.baoss.SettingTermsOfUseActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:theme="#android:style/Theme.NoTitleBar.Fullscreen" >
</activity>
</application>
I hope you can help me=).

One thing I can notice is about
<uses-permission android:name="android.permission.CALL_PHONE" />
Infact that permission implies android.hardware.telephony features, which is generally available just on phones and not in tablets. Try marking that feature as not required:
<uses-feature android:name="android.hardware.telephony" android:required="false" />
Don't forget to check at runtime if the current device has phone capability:
PackageManager pm = getPackageManager();
if (pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY)){
//Add the code for making call
}else{
//Add the code for devices where telephony is not present, if needed
}

Android app with Phonegap crashes on landscape rotation

I created an Android app with Phonegap. When the app runs and I flip the phone into landscape it simply crashes. I already tried adding this to my manifest:
android:configChanges="orientation|keyboardHidden"
also tried:
android:configChanges="orientation|screenSize|keyboardHidden"
No effect. Any suggestions?
Update:
This is what logcat tells me when the app crashes: http://dl.dropbox.com/u/17844821/zeug/logcat.txt
Update:
This is my manifest file:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.foo.bar"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="15" />
<supports-screens
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:resizeable="true"
android:anyDensity="true" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<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" >
<activity
android:configChanges="orientation|keyboardHidden"
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>
</manifest>

Make sure that put those in the activity tag like this:
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize
|locale">
and close it after them.
I have this problem once and I made this mistake.

Do you have the INTERNET permission in your AndroidManifest.xml? Based on the exception it looks like the CallbackServer can't open a socket which would cause a bunch of problems.

APP says "package file has bad manifest" when installed from market

I have an app that works fine from emulator or on device testing, but when installed from the market it can't install with the fllowing error:
"package file has bad manifest"
what could be causing this? I've been checking through the manifest dozens of time without results.
[EDIT]
Here is the manifest with some sensitive parts edited
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.xxx.xxx"
android:versionCode="7"
android:versionName="1.55">
<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="8" />
<supports-screens android:resizeable="true"
android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:anyDensity="true"/>
<application android:label="My App"
android:icon="#drawable/icon"
>
<activity
android:label="My App"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation"
>
<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"/>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
</manifest>
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