add shared preference

app/src/main/java/it/unisannio/ding/ids/wedroid/app/LoginActivity.kt

@@ -1,10 +1,13 @@
 package it.unisannio.ding.ids.wedroid.app
 
+import android.content.Context
+import android.content.SharedPreferences
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import android.util.Log
 import android.view.View
 import android.widget.Toast
+import it.unisannio.ding.ids.wedroid.app.util.SharedPreferenceHelper
 import it.unisannio.ding.ids.wedroid.wrapper.api.LoginService
 import it.unisannio.ding.ids.wedroid.wrapper.entity.UserPrototype
 import kotlinx.android.synthetic.main.activity_login.*
@@ -15,13 +18,17 @@ import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
 
 class LoginActivity : AppCompatActivity() {
+    lateinit var sph: SharedPreferenceHelper
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_login)
+        sph = SharedPreferenceHelper(this)
 
-
+        val id = sph.userId
-
+        val token = sph.token
+        val url = sph.baseUrl
+        Log.d("sharedPreference", "userId: $id\n token: $token\n url: $url")
     }
 
     fun loginButton(v: View) {
@@ -32,7 +39,6 @@ class LoginActivity : AppCompatActivity() {
         }
 
 
-
         val userNameText = username.text.toString()
         val passwordText = password.text.toString()
 
@@ -54,6 +60,7 @@ class LoginActivity : AppCompatActivity() {
             }
 
             override fun onResponse(call: Call<UserPrototype>, response: Response<UserPrototype>) {
+
                 if (response.code() != 200) {
                     Toast.makeText(
                         applicationContext,
@@ -62,6 +69,11 @@ class LoginActivity : AppCompatActivity() {
                     ).show()
                     return
                 }
+                val users = response.body()
+                sph.baseUrl = istanceServer.text.toString()
+                sph.token = users?.token
+                sph.userId = users?.id
+
                 Toast.makeText(
                     applicationContext,
                     "Login effettuato con successo",

app/src/main/java/it/unisannio/ding/ids/wedroid/app/util/SharedPreferenceHelper.kt

@@ -0,0 +1,35 @@
+package it.unisannio.ding.ids.wedroid.app.util
+
+import android.content.Context
+
+class SharedPreferenceHelper(context : Context) : PreferenceReader, PreferenceWriter {
+    private val sp = context.getSharedPreferences("userinfo", Context.MODE_PRIVATE)
+
+    override fun getBaseUrl(): String? {
+        return sp.getString("url", "")
+    }
+
+    override fun getUserId(): String? {
+        return sp.getString("id", "")
+    }
+
+    override fun getToken(): String? {
+        return sp.getString("token", "")
+    }
+
+    override fun setBaseUrl(baseUrl: String?) {
+        val editor = sp.edit()
+        editor.putString("url", baseUrl).apply()
+
+           }
+
+    override fun setUserId(userId: String?) {
+        val editor = sp.edit()
+        editor.putString("id", userId).apply()
+    }
+
+    override fun setToken(token: String?) {
+        val editor = sp.edit()
+        editor.putString("token", token).apply()
+    }
+}