これが私のやり方です、2つのアプリを作成しました。
試用版のないものをアップロードして、有料アプリとしてストアをプレイしました。
そして、無料アプリとして試用活動をしているもの。
初回起動時の無料アプリには、トライアルとストア購入のオプションがあります。ユーザーがストア購入を選択すると、ユーザーはストアにリダイレクトされて購入しますが、ユーザーがトライアルをクリックするとトライアルアクティビティに移動します
注：@snctlnのようにオプション3を使用しましたが、変更を加えました
最初に、デバイスの時間に依存していませんでした。DBへのトライアル登録を行うphpファイルから時間を取得しました。
次に、デバイスのシリアル番号を使用して各デバイスを一意に識別しました。
最後に、アプリはサーバー接続から返される時間値に依存するのではなく、デバイスのシリアル番号が変更された場合にのみシステムを回避できます。これはユーザーにとって非常にストレスになります。
ここに私のコードがあります（試用アクティビティ用）：
package com.example.mypackage.my_app.Start_Activity.activity;
import android.Manifest;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.telephony.TelephonyManager;
import android.view.KeyEvent;
import android.widget.TextView;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import com.example.onlinewisdom.cbn_app.R;
import com.example.mypackage.my_app.Start_Activity.app.Config;
import com.example.mypackage.my_app.Start_Activity.data.TrialData;
import com.example.mypackage.my_app.Start_Activity.helper.connection.Connection;
import com.google.gson.Gson;
import org.json.JSONObject;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import cn.pedant.SweetAlert.SweetAlertDialog;
public class Trial extends AppCompatActivity {
Connection check;
SweetAlertDialog pDialog;
TextView tvPleaseWait;
private static final int MY_PERMISSIONS_REQUEST_READ_PHONE_STATE = 0;
String BASE_URL = Config.BASE_URL;
String BASE_URL2 = BASE_URL+ "/register_trial/"; //http://ur link to ur API
//KEY
public static final String KEY_IMEI = "IMEINumber";
private final SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
private final long ONE_DAY = 24 * 60 * 60 * 1000;
SharedPreferences preferences;
String installDate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_trial);
preferences = getPreferences(MODE_PRIVATE);
installDate = preferences.getString("InstallDate", null);
pDialog = new SweetAlertDialog(this, SweetAlertDialog.PROGRESS_TYPE);
pDialog.getProgressHelper().setBarColor(Color.parseColor("#008753"));
pDialog.setTitleText("Loading...");
pDialog.setCancelable(false);
tvPleaseWait = (TextView) findViewById(R.id.tvPleaseWait);
tvPleaseWait.setText("");
if(installDate == null) {
//register app for trial
animateLoader(true);
CheckConnection();
} else {
//go to main activity and verify there if trial period is over
Intent i = new Intent(Trial.this, MainActivity.class);
startActivity(i);
// close this activity
finish();
}
}
public void CheckConnection() {
check = new Connection(this);
if (check.isConnected()) {
//trigger 'loadIMEI'
loadIMEI();
} else {
errorAlert("Check Connection", "Network is not detected");
tvPleaseWait.setText("Network is not detected");
animateLoader(false);
}
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
//Changes 'back' button action
if (keyCode == KeyEvent.KEYCODE_BACK) {
finish();
}
return true;
}
public void animateLoader(boolean visibility) {
if (visibility)
pDialog.show();
else
pDialog.hide();
}
public void errorAlert(String title, String msg) {
new SweetAlertDialog(this, SweetAlertDialog.ERROR_TYPE)
.setTitleText(title)
.setContentText(msg)
.show();
}
/**
* Called when the 'loadIMEI' function is triggered.
*/
public void loadIMEI() {
// Check if the READ_PHONE_STATE permission is already available.
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
// READ_PHONE_STATE permission has not been granted.
requestReadPhoneStatePermission();
} else {
// READ_PHONE_STATE permission is already been granted.
doPermissionGrantedStuffs();
}
}
/**
* Requests the READ_PHONE_STATE permission.
* If the permission has been denied previously, a dialog will prompt the user to grant the
* permission, otherwise it is requested directly.
*/
private void requestReadPhoneStatePermission() {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.READ_PHONE_STATE)) {
// Provide an additional rationale to the user if the permission was not granted
// and the user would benefit from additional context for the use of the permission.
// For example if the user has previously denied the permission.
new AlertDialog.Builder(Trial.this)
.setTitle("Permission Request")
.setMessage(getString(R.string.permission_read_phone_state_rationale))
.setCancelable(false)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//re-request
ActivityCompat.requestPermissions(Trial.this,
new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
}
})
.setIcon(R.drawable.warning_sigh)
.show();
} else {
// READ_PHONE_STATE permission has not been granted yet. Request it directly.
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
}
}
/**
* Callback received when a permissions request has been completed.
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == MY_PERMISSIONS_REQUEST_READ_PHONE_STATE) {
// Received permission result for READ_PHONE_STATE permission.est.");
// Check if the only required permission has been granted
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// READ_PHONE_STATE permission has been granted, proceed with displaying IMEI Number
//alertAlert(getString(R.string.permision_available_read_phone_state));
doPermissionGrantedStuffs();
} else {
alertAlert(getString(R.string.permissions_not_granted_read_phone_state));
}
}
}
private void alertAlert(String msg) {
new AlertDialog.Builder(Trial.this)
.setTitle("Permission Request")
.setMessage(msg)
.setCancelable(false)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do somthing here
}
})
.setIcon(R.drawable.warning_sigh)
.show();
}
private void successAlert(String msg) {
new SweetAlertDialog(this, SweetAlertDialog.SUCCESS_TYPE)
.setTitleText("Success")
.setContentText(msg)
.setConfirmText("Ok")
.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.dismissWithAnimation();
// Prepare intent which is to be triggered
//Intent i = new Intent(Trial.this, MainActivity.class);
//startActivity(i);
}
})
.show();
}
public void doPermissionGrantedStuffs() {
//Have an object of TelephonyManager
TelephonyManager tm =(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
//Get IMEI Number of Phone //////////////// for this example i only need the IMEI
String IMEINumber = tm.getDeviceId();
/************************************************
* **********************************************
* This is just an icing on the cake
* the following are other children of TELEPHONY_SERVICE
*
//Get Subscriber ID
String subscriberID=tm.getDeviceId();
//Get SIM Serial Number
String SIMSerialNumber=tm.getSimSerialNumber();
//Get Network Country ISO Code
String networkCountryISO=tm.getNetworkCountryIso();
//Get SIM Country ISO Code
String SIMCountryISO=tm.getSimCountryIso();
//Get the device software version
String softwareVersion=tm.getDeviceSoftwareVersion()
//Get the Voice mail number
String voiceMailNumber=tm.getVoiceMailNumber();
//Get the Phone Type CDMA/GSM/NONE
int phoneType=tm.getPhoneType();
switch (phoneType)
{
case (TelephonyManager.PHONE_TYPE_CDMA):
// your code
break;
case (TelephonyManager.PHONE_TYPE_GSM)
// your code
break;
case (TelephonyManager.PHONE_TYPE_NONE):
// your code
break;
}
//Find whether the Phone is in Roaming, returns true if in roaming
boolean isRoaming=tm.isNetworkRoaming();
if(isRoaming)
phoneDetails+="\nIs In Roaming : "+"YES";
else
phoneDetails+="\nIs In Roaming : "+"NO";
//Get the SIM state
int SIMState=tm.getSimState();
switch(SIMState)
{
case TelephonyManager.SIM_STATE_ABSENT :
// your code
break;
case TelephonyManager.SIM_STATE_NETWORK_LOCKED :
// your code
break;
case TelephonyManager.SIM_STATE_PIN_REQUIRED :
// your code
break;
case TelephonyManager.SIM_STATE_PUK_REQUIRED :
// your code
break;
case TelephonyManager.SIM_STATE_READY :
// your code
break;
case TelephonyManager.SIM_STATE_UNKNOWN :
// your code
break;
}
*/
// Now read the desired content to a textview.
//tvPleaseWait.setText(IMEINumber);
UserTrialRegistrationTask(IMEINumber);
}
/**
* Represents an asynchronous login task used to authenticate
* the user.
*/
private void UserTrialRegistrationTask(final String IMEINumber) {
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, BASE_URL2+IMEINumber, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Gson gson = new Gson();
TrialData result = gson.fromJson(String.valueOf(response), TrialData.class);
animateLoader(false);
if ("true".equals(result.getError())) {
errorAlert("Error", result.getResult());
tvPleaseWait.setText("Unknown Error");
} else if ("false".equals(result.getError())) {
//already created install/trial_start date using the server
// so just getting the date called back
Date before = null;
try {
before = (Date)formatter.parse(result.getResult());
} catch (ParseException e) {
e.printStackTrace();
}
Date now = new Date();
assert before != null;
long diff = now.getTime() - before.getTime();
long days = diff / ONE_DAY;
// save the date received
SharedPreferences.Editor editor = preferences.edit();
editor.putString("InstallDate", String.valueOf(days));
// Commit the edits!
editor.apply();
//go to main activity and verify there if trial period is over
Intent i = new Intent(Trial.this, MainActivity.class);
startActivity(i);
// close this activity
finish();
//successAlert(String.valueOf(days));
//if(days > 5) { // More than 5 days?
// Expired !!!
//}
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
animateLoader(false);
//errorAlert(error.toString());
errorAlert("Check Connection", "Could not establish a network connection.");
tvPleaseWait.setText("Network is not detected");
}
})
{
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_IMEI, IMEINumber);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonObjectRequest);
}
}
私のphpファイルは次のようになります（RESTスリムテクノロジー）。
/**
* registerTrial
*/
public function registerTrial($IMEINumber) {
//check if $IMEINumber already exist
// Instantiate DBH
$DBH = new PDO_Wrapper();
$DBH->query("SELECT date_reg FROM trials WHERE device_id = :IMEINumber");
$DBH->bind(':IMEINumber', $IMEINumber);
// DETERMINE HOW MANY ROWS OF RESULTS WE GOT
$totalRows_registered = $DBH->rowCount();
// DETERMINE HOW MANY ROWS OF RESULTS WE GOT
$results = $DBH->resultset();
if (!$IMEINumber) {
return 'Device serial number could not be determined.';
} else if ($totalRows_registered > 0) {
$results = $results[0];
$results = $results['date_reg'];
return $results;
} else {
// Instantiate variables
$trial_unique_id = es_generate_guid(60);
$time_reg = date('H:i:s');
$date_reg = date('Y-m-d');
$DBH->beginTransaction();
// opening db connection
//NOW Insert INTO DB
$DBH->query("INSERT INTO trials (time_reg, date_reg, date_time, device_id, trial_unique_id) VALUES (:time_reg, :date_reg, NOW(), :device_id, :trial_unique_id)");
$arrayValue = array(':time_reg' => $time_reg, ':date_reg' => $date_reg, ':device_id' => $IMEINumber, ':trial_unique_id' => $trial_unique_id);
$DBH->bindArray($arrayValue);
$subscribe = $DBH->execute();
$DBH->endTransaction();
return $date_reg;
}
}
次に、メインアクティビティで、共有設定（試用アクティビティで作成されたinstallDate）を使用して残りの日数を監視し、日数が経過した場合は、メインアクティビティUIをブロックして、購入するために店に行くメッセージを表示します。
ここで私が目にする唯一の欠点は、ローグユーザーが有料アプリを購入し、Zenderのようなアプリと共有したり、ファイル共有したり、apkファイルをサーバーで直接ホストしたりして、人々が無料でダウンロードできるようにすることです。しかし、私はすぐにその回答またはそのソリューションへのリンクを使用してこの回答を編集します。
これが魂を救うことを願っています...いつか
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