Getting started

Installation

Include dependency in build.gradle.

dependencies {
    implementation "org.hisp.dhis:android-core:1.11.0.1"
    ...
}

Additionally, you need to include this repository in your root gradle file if it is not already there:

allprojects {
    repositories {
        ...
        maven {url 'https://jitpack.io'}
    }
}

Check compatibility here.

D2 initialization

In order to start using the SDK, the first step is to initialize a D2 object. The helper class D2Manager offers static methods to setup and initialize the D2 instance. Also, it ensures that D2 is a singleton across the application.

The minimum configuration that needs to be passed to the D2Manager is the following:

D2Configuration configuration = D2Configuration.builder()
    .context(context)
    .build();

Using the configuration you can instantiate D2.

SingleD2> d2Single = D2Manager.instantiateD2(configuration);

Once the Single is completed, you can access D2 with the following method:

D2 d2 = D2Manager.getD2();

If you are not using RxJava, you can instantiate D2 in a blocking way:

D2 d2 = D2Manager.blockingInstantiateD2(configuration);

The object D2Configuration has a lot of fields to configure the behavior of the SDK.

Attribute	Required	Description	Default
context	true	Application context	-
appName	false	Use to create the "user-agent" header	From Android Manifest
appVersion	false	Use to create the "user-agent" header	From Android Manifest
readTimeoutInSeconds	false	Read timeout for http queries	30 seconds
connectTimeoutInSeconds	false	Connect timeout for http queries	30 seconds
writeTimeoutInSeconds	false	Write timeout for http queries	30 seconds
interceptors	false	Interceptors for OkHttpClient	None
networkInterceptors	false	NetworkInterceptors for OkHttpClient	None

Google Play Services Support

The Google play services have been completely removed to make the SDK work on devices where the play services are not allowed; the SDK was using the ProviderInstaller present in the play service dependency to update the security provider to be protected against SSL exploits

If you're using a SDK version without google play services support, you have two options to update the security provider against SSL exploits, you can use an open-source solution called conscrypt to target devices without the google play services support or you can use play-services-safetynet dependency that's not open-source and required the google play services.

1. Play services Safetynet Dependency

If you're targeting devices that support the google play services, the best option is to use the ProviderInstaller included in the play-services-SafetyNet dependency by following steps.

dependencies {
    implementation "com.google.android.gms:play-services-safetynet:version>"
    ...
}

After adding the play-services-safetynet dependency just create a method that you can used to install the security provider

public static void initialize(Context context){
    try {
        // ....
        ProviderInstaller.installIfNeeded(context.getApplicationContext());
        // ....
    } catch (GooglePlayServicesRepairableException e) {
        Log.e(TAG, e.toString());
    } catch (GooglePlayServicesNotAvailableException e) {
        Log.e(TAG, e.toString());
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, e.toString());
    }
}

For more information about play-services-safetynet, check the official documentation link

2. Open-source solution

If you're not targeting devices with the google play services, conscrypt is an alternative to the play-services-safetynet dependency that can be used to update security provider against SSL exploits

dependencies {
    implementation 'org.conscrypt:conscrypt-android:conscrypt-version>'
    ...
}

Setting up conscrypt is similar to the Google’s provider like in the following code :

public static void initialize(){
    try {
        Security.insertProviderAt(Conscrypt.newProvider(), 1);
    } catch(Exception e) {
        Log.e(TAG, e.toString());
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, e.toString());
    }
}

For more information about conscrypt, check the official github repository on this link