Trialy makes it super easy to create a free trial for your in-app-purchases. Trialy takes care of the heavy lifting for you (using server-side checks with customizable grace periods to allow offline use, for example) so you can focus on developing an amazing app.
- Add the library to your app using gradle
- Grab a free API key from here
For documentation and additional information see the website.
dependencies {
implementation 'io.trialy.library:trialy:1.0.9'
}Initialize the library in your main activity's onCreate() method:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Initialize the library and check the current trial status on every launch
Trialy mTrialy = new Trialy(mContext, "YOUR_TRIALY_APP_KEY");
mTrialy.checkTrial("YOUR_TRIAL_SKU", mTrialyCallback);
}Add a callback handler:
private TrialyCallback mTrialyCallback = new TrialyCallback() {
@Override
public void onResult(int status, long timeRemaining, String sku) {
switch (status){
case STATUS_TRIAL_JUST_STARTED:
//The trial has just started - enable the premium features for the user
break;
case STATUS_TRIAL_RUNNING:
//The trial is currently running - enable the premium features for the user
break;
case STATUS_TRIAL_JUST_ENDED:
//The trial has just ended - block access to the premium features
break;
case STATUS_TRIAL_NOT_YET_STARTED:
//The user hasn't requested a trial yet - no need to do anything
break;
case STATUS_TRIAL_OVER:
//The trial is over
break;
default:
Log.e(TAG, "Trialy response: " + Trialy.getStatusMessage(status));
break;
}
}
};To start a trial, call mTrialy.startTrial("YOUR_TRIAL_SKU", mTrialyCallback);
Your app key and trial SKU can be found in your Trialy developer dashboard.
Remember to add the INTERNET permission to your AndroidManifext.xml. If you're using a "per Google account" trial, also add the GET_ACCOUNTS permission to your AndroidManifest.xml (and request it within your app on Android 6.0+):
<uses-permission android:name="android.permission.GET_ACCOUNTS" />