Develop Reference

Cannot resolve method: CameraSource.Builder.setAutoFocusEnabled

I use Vision API to scan barcode. It's almost done, except auto-focus. I follow the guide in this link: https://developers.google.com/android/reference/com/google/android/gms/vision/CameraSource.Builder, use setAutoFocusEnabled method and get an error: "Cannot resolve method 'setAutoFocusEnabled(boolean)'"
My Android studio version: 2.1.1
JRE: 1.8.0
file build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
applicationId "***"
minSdkVersion 17
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:support-v4:23.4.0'
compile 'com.google.android.gms:play-services:7.8+'
}

You are reading newer documentation than the library you are using.
If you want the newer features, then upgrade.
Replace com.google.android.gms:play-services:7.8+
With com.google.android.gms:play-services-vision:10.0.0, or some other, later version than 7.8.
See about selective compilation. It will make your app smaller, and build faster.

Unable to download

I am making an android app (testing with a physical device running 4.4.4) and every once in a while when I fresh run it or open it if it's already installed then it shows a "Currently unable to download. Please try again later" toast. I'm not downloading anything within the app, I don't use internet, I'm not sure which files are relevant, someone let me know and I can post them. I have no idea where this could be coming from.
The only thing I can think of is possibly SharedPreference is doing something weird? I'll post my gradle at least.
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "24.0.1"
defaultConfig {
applicationId "com.apps.andapp.appname"
minSdkVersion 19
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.code.gson:gson:2.7'
}

How can I compile the older version of google play service in Android Studio?

I had tried the new version(8.4.0) of google play service in my application. This had successful to run.
But I want to compile the older google play service.
When I change the version in Android Studio, it cannot sync successful.
How can I compile the correct older google play service. I want to compile version at lease 6.0.5.
Thank you!
Here is the build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.example.tina.releasemap"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.google.android.gms:play-services:6.5.87'
}

You cannot select just a random version of play-services and hope it'll work. The only versions you can select from are the ones you've installed through Android SDK Manager inside your IDE.
To check which versions you have, you need to check your SDK dir. More information here.

Cannot resolve symbols in Android Studio and the code is okay

I know that this question was asked here a few times, but everything i have tried from answers they gave there didn't work for me.
Also i need to mention that i have tried File - Invilidate Cache and Restart and it didn't work..
Here is my build gradle(Maybe something there is wrong):
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.dusandimitrijevic.geomondo"
minSdkVersion 19
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.0'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.mcxiaoke.volley:library:1.0.19'
compile 'com.github.manuelpeinado.fadingactionbar:fadingactionbar:3.1.2'
}

I see three issues.
Your targetSdkVersion is higher than your compileSdkVersion.
You are using a version of the support library that requires a minimum of API 22 to compile with.
You are not specifying the version of recyclerview, so it will import the latest one, which requires API 23 to compile with.
The fix is to set compileSdkVersion to 23. That SHOULD fix your missing symbols issue.

Android Studio support v4

I know this question was asked several times, but none of the answers helped me so far...
All I did was generating a preferences screen with Android Studio and now it tells me that NavUtils cannot be found. Even though my build.gradle looks right (I guess):
apply plugin: 'com.android.application'
android {
compileSdkVersion 19
buildToolsVersion '20.0.0'
defaultConfig {
applicationId "com.brobox.getyourshitdone"
minSdkVersion 15
targetSdkVersion 19
versionCode 1
versionName '1.0'
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:cardview-v7:+'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:palette-v7:+'
compile 'com.android.support:support-v4:20.0.+'
compile files('libs/android-support-v4.jar')
}
I hope someone can help :/
Edit:
Just created a new project on my laptop and generated the SettingsActivity again. This is my gradle file:
apply plugin: 'com.android.application'
android {
compileSdkVersion 19
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.brobox.getyourshitdone"
minSdkVersion 14
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:support-v13:20.0.0'
compile 'com.android.support:support-v4:20.0.0'
}
Still got the same error <.<

You have to remove this line implementation files('libs/android-support-v4.jar') and you have to remove this file.
The support library should only be added by gradle. And you have done that in this line implementation 'com.android.support:support-v4:20.0.+'.
YourtargetSdkVersion and your compileSdkVersion are also weird. Those values are not supported with the L developer preview.
compileSdkversionshould be 'android-L', targetSdkVersion should be 'L'.

Press this button, and clean rebuild project.
And add to dependencies :
dependencies {
compile 'com.android.support:appcompat-v7:+'
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:cardview-v7:+'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:palette-v7:+'
}

Well some time passed and now it works! I don't know what solved it exactly but I did the following:
I updated to Android Studio 0.8.12 manually, because that was the only way to update it
In a new project I tried to manually add a SettingsActivity and therefore added support-v4 to my repositories
Thanks for all your help on this silly question...