Develop Reference

ActionBar is not being displayed anymore after migration from Eclipse to Android Studio

I recently tried to edit my 4 year old android application in the recently appeared Android Studio 2.3.1.
After importing the code I can launch it on my mobile phone. However the action bar seems to have disappeared. What has gone wrong?
How can I tell android to display the action bar?
I have implemented the action bar activity like this:
public class MainActivity extends ActionBarActivity
My build.gradle looks like this:
apply plugin: 'com.android.application'
android {
compileSdkVersion 17
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "de.my.app"
minSdkVersion 8
targetSdkVersion 17
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
dependencies {
compile 'com.android.support:appcompat-v7:18.0.0'
}
I also tried to replace the compile command with something newer one:
compile 'com.android.support:appcompat-v7:25.3.1'
but already the syncing in android studio fails like this, throwing the following error:
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 8 cannot be smaller than version 9 declared in library [com.android.support:appcompat-v7:25.3.1] /home/user/.android/build-cache/815cafa5312f1d889eb1134b2184a62b3f88d8a3/output/AndroidManifest.xml
Suggestion: use tools:overrideLibrary="android.support.v7.appcompat" to force usage
I haven't done much android coding in the last 4 years so I assume the ActionBar stuff has changed profoundly but shouldn't there be a way to compile the old code as it is using android studio?
Edit:
This is the manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.myApp.myAppDemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/icon_app"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="de.myApp.myAppDemo.Splash"
android:label="#string/app_name"
android:screenOrientation="landscape" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="de.myApp.myAppDemo.MainActivity"
android:label="#string/app_name"
android:screenOrientation="landscape"
android:theme="#style/Theme.AppCompat.Light">
<intent-filter>
<action android:name="de.myApp.myAppDemo.MAINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="de.myApp.myAppDemo.PropertiesAssign"
android:label="#string/app_name"
android:screenOrientation="landscape" >
<intent-filter>
<action android:name="de.myApp.myAppDemo.PROPERTIESASSIGN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="de.myApp.myAppDemo.PropertiesView"
android:label="#string/app_name"
android:screenOrientation="landscape" >
<intent-filter>
<action android:name="de.myApp.myAppDemo.PROPERTIESVIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

Meanwhile I got at least the ActionBar to be displayed. However I had to increase the MinSDK and targetSdkVersion / compileSdkVersion bigly: From 8,17 to 15,23. Moreover I had to look in the SDK-Manager to see which exact version of Android Support Library was installed on my system (23.2.0) and adapt the corresponding line in build.gradle.
apply plugin: 'com.android.application'
android {
compileSdkVersion 23 //->modified
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "de.Geo.geodraw"
minSdkVersion 15 //->modified
targetSdkVersion 23 //->modified
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
dependencies {
compile "com.android.support:appcompat-v7:23.2.0" //->modified
}
Not sure whether it was relevant or necessary but following this page I also added
allprojects {
repositories {
jcenter()
maven { //->modified
url "https://maven.google.com" //->modified
} //->modified
}
}
in another build.gradle file.
If there is another solution without drastically changing minSdk and targetSdk I will accept that answer.

Play store says my app is supported by 0 devices - no devices are compatible with my app

I have recently finished building my first android app. I published it to the store today but it says it supports 0 devices. Here is my manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.guessthepicturespazam.guessit" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="נחש את המילה"
android:theme="#style/Theme.AppCompat.NoActionBar" >
<activity
android:name=".MainActivity"
android:configChanges="orientation"
android:label="נחש את המילה"
android:screenOrientation="portrait" >
</activity>
<activity
android:name=".GameActivity"
android:configChanges="orientation"
android:label="#string/title_activity_game"
android:screenOrientation="portrait" >
</activity>
<activity
android:name=".Splash"
android:configChanges="orientation"
android:label="נחש את המילה"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".StoreActivity"
android:label="#string/title_activity_store" >
</activity>
<activity
android:name=".GameOverActivity"
android:label="#string/title_activity_game_over" >
</activity>
</application>
<supports-screens
android:anyDensity="true"
android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:xlargeScreens="true"
android:resizeable="true" />
</manifest>
This is my build.grade file:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.GuessTheWordZahal.guessit"
minSdkVersion 10
targetSdkVersion 23
versionCode 2
versionName "1.0.1"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'org.apache.directory.studio:org.apache.commons.io:2.4'
compile 'com.google.android.gms:play-services-ads:7.8.0'
}
I tried looking this problem up online but I couldn't find a problem similar to mine. Most apps have no supported devices because they use features that are only available in some or in no devices. I just can't figure out what's wrong in mine. I've actually tested this app on my samsung galaxy and it worked fine

I had this same problem, what fixed it for me was changing
compile 'org.apache.directory.studio:org.apache.commons.io:2.4'
in build.gradle to
compile 'commons-io:commons-io:2.4'

Android app showing incompatible after publishing

I have just tried to publish my first app but when it finally went through it was shown as being incompatible to multiple devices, I have been searching and every fix that I have come across has done nothing for me. Any suggestions?
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.customledsupply.ledaudit" >
<uses-feature
android:name="android.hardware.camera2"
android:required="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#drawable/cls"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainPage"
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=".OldLocation"
android:label="#string/title_activity_old_location" >
</activity>
<activity
android:name=".NewLocation"
android:label="#string/title_activity_new_location" >
</activity>
<activity
android:name=".RoomDescription"
android:label="#string/title_activity_room_description" >
</activity>
<activity
android:name=".FixtureDescription"
android:label="#string/title_activity_fixture_description" >
</activity>
<activity
android:name=".RoomList"
android:label="#string/title_activity_room_list" >
</activity>
<activity
android:name=".Summary"
android:label="#string/title_activity_summary" >
</activity>
</application>
</manifest>
Gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.customledsupply.ledaudit"
minSdkVersion 19
targetSdkVersion 22
versionCode 2
versionName "2.0"
}
signingConfigs {
release {
storeFile file("myreleasekey.keystore")
storePassword "CLS"
keyAlias "Custom LED Supply"
keyPassword "CLS"
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.1'
compile 'io.realm:realm-android:0.82.0'
}

Most probably, the potential cause is the following:
<uses-feature
android:name="android.hardware.camera2"
android:required="true" />
If any device doesn't have this feature, it wont even show it on the play store for them and will be in your list of incompatible devices. If you want to make it optional, use android:required="false" instead. By doing thing, you might be able to get around the issue.
Otherwise if you give examples of the incompatible devices, we might be able to narrow down the issue more. Hope it helps.

In your AppManifest.xml, you added a feature that is not be supported by all devices which is android:name="android.hardware.camera2". It only supports API 21+. However, you can set the required attribute to false, but that will cause issues for your app.
Reference Link: https://developer.android.com/reference/android/hardware/camera2/package-summary.html

android.compileSdkVersion is missing

Im using AndroidStudio and Im trying to put some ads on my app, according to the setting up google play API - https://developer.android.com/google/play-services/setup.html
Adter i sync the project with the grandle files i get this error:
Error:Failed to find: com.google.android.gms:play-services:5.0.77
Install Repository and sync project<br>Open File<br>Open in Project Structure dialog
This is my gradle.build:
apply plugin: 'com.android.application'
apply plugin: 'android'
android {
compileSdkVersion 19
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.pachu.fartsounds"
minSdkVersion 8
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:19.+'
compile 'com.google.android.gms:play-services:5.0.77'
}
My Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pachu.fartsounds">
<application
android:allowBackup="true"
android:icon="#drawable/fart_icon"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".FartActivity"
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>
</application>
Any ideas? Thanks !

You are missing critical components of your manifest. The SDK error you are receiving is because the compiler doesn't know at what SDK level to compile your app - you're missing <uses-sdk.
And while we're at it, you're also missing your package name, version name, and version code. These are all critical components to your app. Here's an example of a well-formed manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.exampleapp"
android:versionCode="2"
android:versionName="v0.2-Alpha" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.GET_TASKS" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.exampleapp.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>
<service android:enabled="true" android:name="com.example.exampleapp.MyService" />
</application>
</manifest>
Notice at the very top: the sections that read package, android:versionCode, and android:versionName. And also, below those, the entire section that starts with <uses-sdk... These are all required.

Add this to your build.gradle:
android {
compileSdkVersion 20
buildToolsVersion '20.0.0'
}

I had the same issue and fixed it next way:
in build.gradle file of module (usually in app, not in root project directory) I set
android {
defaultConfig {
minSdkVersion 19
targetSdkVersion 19
// your application version and id settings
}
where 19 - is and SDK I have completely loaded in Android SDK Manager
(same values checked in Studio module settings, Properties and Flavors tabs).
So, may be your problem is a cause of minSdkVersion 8 value, when you don't have 8 API installed.

I had the same error.
In my case the package 'Extras\Google Repository' was not installed.
So after installing it in SDK Manager the problem had gone.

Failure [INSTALL_FAILED_OLDER_SDK] error

I have an AVD emulator set at API 18 and my manifest is as follows:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pushpindesigns.com.lines"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="12" android:targetSdkVersion="20"/>
<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"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Level_1"
android:label="#string/title_activity_level_1" >
</activity>
</application>
Updated build.gradle file that includes the compilesdkversion = 18
apply plugin: 'com.android.application'
android {
compileSdkVersion 18
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "pushpindesigns.com.lines"
minSdkVersion 8
targetSdkVersion 'L'
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:19.+'
}
Code above is updated and still doesn't work.................Let me know what you think

Replace android-L with something else -- 20 or 19 would be likely choices. The "L" Developer Preview will not work on anything but "L"-equipped devices and emulators.
Also, the targetSdkVersion in your build.gradle overrides that which is in your manifest. Replace the targetSdkVersion in your build.gradle to 20.