[android] 정해진 기간이 지나면 만료되는 Android 평가판 애플리케이션 만들기

Android Studio 프로젝트에 간단히 드롭 할 수 있는 Android 평가판 SDK 를 개발했으며 오프라인 유예 기간을 포함하여 모든 서버 측 관리를 처리합니다.

사용하려면 간단히

메인 모듈에 라이브러리 추가 build.gradle

dependencies {
  compile 'io.trialy.library:trialy:1.0.2'
}

주요 활동의 onCreate()방법으로 라이브러리 초기화

@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(TRIALY_SKU, mTrialyCallback);
}

콜백 핸들러를 추가합니다.

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;
        }
        Log.i("TRIALY", "Trialy response: " + Trialy.getStatusMessage(status));
    }

};

평가판을 시작하려면 mTrialy.startTrial("YOUR_TRIAL_SKU", mTrialyCallback);
앱 키로 전화하면 평가판 SKU는 Trialy 개발자 대시 보드 에서 찾을 수 있습니다 .

답변

private final SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
private final long ONE_DAY = 24 * 60 * 60 * 1000;

@Override
protected void onCreate(Bundle state){
    SharedPreferences preferences = getPreferences(MODE_PRIVATE);
    String installDate = preferences.getString("InstallDate", null);
    if(installDate == null) {
        // First run, so save the current date
        SharedPreferences.Editor editor = preferences.edit();
        Date now = new Date();
        String dateString = formatter.format(now);
        editor.putString("InstallDate", dateString);
        // Commit the edits!
        editor.commit();
    }
    else {
        // This is not the 1st run, check install date
        Date before = (Date)formatter.parse(installDate);
        Date now = new Date();
        long diff = now.getTime() - before.getTime();
        long days = diff / ONE_DAY;
        if(days > 30) { // More than 30 days?
             // Expired !!!
        }
    }

    ...
}