support:CardView minimum SDK? - android

I'm trying to add CardView support into my app for devices lower than Android L by adding the line:
compile 'com.android.support:cardview-v7:21.+'
I've then added compileSdkVersion and targetSdkVersion to 'android-L'
Now, unless I am mistaken, I thought that this would have built on my Nexus 5 in 4.4.4, however I get the error
Failure [INSTALL_FAILED_OLDER_SDK]
Am I missing something or misunderstood this? Full build.gradle below:
apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.gh.app"
minSdkVersion 15
targetSdkVersion 'android-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'])
wearApp project(':wear')
compile 'com.google.android.gms:play-services-wearable:+'
compile 'com.android.support:support-v4:20.0+'
compile files('libs/TalkClient.jar')
compile 'com.android.support:cardview-v7:21.+'
}

While CardView and RecyclerView are both new widgets being added to the support library (and therefore will be available on API 7+ devices), during the developer preview they are limited to Android L devices only.

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I have a problem with Gradle !!
It keeps showing me errors , can some one help me to resolve this problem
Note: It's my first time to install android studio
Try using this:
compile 'com.android.support:appcompat-v7:24.1.0'
Use latest support library and change your target and compile sdk also
compileSdkVersion 24
buildToolsVersion "24.0.1"
targetSdkVersion 24
Try it
compile "com.android.support:appcompat-v7:23.0.1"
and you can change targetSdkVersion 23
Please use my project gradle values and also update sdk libraries:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
multiDexEnabled true
applicationId "com.example.student" //change as your package name
minSdkVersion 16
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-v7:23.0.1'
}
Try to match all versions:
compileSdkVersion 23
buildToolsVersion '23.0.0'
targetSdkVersion 23
Add Following dependencies:
compile 'com.android.support:appcompat-v7:23.0.0'
Make sure you use latest version of Sdk:
how to update sdk
The problem is you're using
compile 'com.android.support:appcompat-v7:19.+'
which gives you all possibilities of Android 4.4.2 Kitkat API 19 and older.
In your project you're trying to use Material Themes which belongs to newer version, I mean com.android.support:appcompat:$version, where version > 21.
Material Design was introduced with Android 5.1 Lollipop API 21
I higly reccomend you to change your build.gradle file to:
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
defaultConfig {
minSdkVersion 21
targetSdkVersion 21
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-v7:24.2.1"
}
but of course changing appcompat library to version :
com.android.support:appcompat-v7:23.0.1"
would be enough ;-)
Hope it would help

Emulators are not showing in Android Studio

In Android Studio the Emulators are not showing . I tried that disabling ADB Integration. but it is not working for me.
Please give me solution for this problem.
Maybe your project is not compatible (API version) with the target emulator. Check build.gradle file if the targetSDK and minimumSdk version is lower or equal to the sdk version of your Emulator.
Be sure that your compiledSdkVersion matches minSdkVersion and supported by targetSdkVersion. For example:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "24.0.0"
defaultConfig {
applicationId "zeta.sqlitetest3"
minSdkVersion 16
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'
}

Downgrade Android SDK( api 23 -> api 21)

Due to some problems with permissions in SDK API 23 (Marshmallow) I wanted to switch back to API 21, yet I'm encountering some issues... I've read so many posts with similiar problems and tried (almost I guess) everything: I've updated all SDK Build/Platform Tools, features for API 21, Suport and Repository Libraries. Then I've cleaned up the project, rebuilt it and synchronized. Yet, I'm getting those errors:
My build.gradle looks like following:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.example.pablo.appcontacts"
minSdkVersion 19
targetSdkVersion 21
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.jakewharton:butterknife:7.0.1'
compile 'com.android.support:appcompat-v7:23.1.1'
}
I'm not very familiar with this, can anybody help me to fix this cause I really can't find a way to..?
3 Steps:
1 Edit build.grade
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.stackoverflow.answer"
minSdkVersion 16
targetSdkVersion 21
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dependencies {
androidTestCompile 'junit:junit:4.12'
compile fileTree(dir: 'libs', include: ['*.jar'])
}
2 Sync gradle button
3 Rebuild project

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 new project no code, apk is 4 mb

I'm creating a simple pro package to unlock features in my free app.
My free app will check if the pro package is installed and unlock pro features if its installed. I created a new project, with no activity. When I pushed it the app to my device it says it's 4 mb in size. Why is it so big when theres no code? Looking at other apps with pro unlockers, they seem very small like 100-200 kb.
build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.dsmartapps.root.kerneltoolkitunlocker"
minSdkVersion 15
targetSdkVersion 21
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-v7:22.0.0'
}
Solution:
simply removed compile 'com.android.support:appcompat-v7:22.0.0' and its now 48.00kb.
Probably has to do with the your Gradle build file. It's probably using the support library, if you have no use of it you can remove it.
EDIT:
Even so, as Jared said a single support library shouldn't make your apk size that big. You should check your dependencies and assets to see what makes up for that size.
Here's a simple Gradle file for a new project:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.example.edd.myapplication"
minSdkVersion 15
targetSdkVersion 21
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-v7:21.0.3'
}
Size with compile 'com.android.support:appcompat-v7:21.0.3': around 900kb.
Size without it: around 22kb.

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