1:  package com.voipplus.mmsclient.serviceLocalStorage;

   2:  

   3:  import android.app.Service;

   4:  import android.content.Intent;

   5:  import android.os.Binder;

   6:  import android.os.IBinder;

   7:  import android.util.Log;

   8:  

   9:  import androidx.annotation.Nullable;

  10:  

  11:  import java.util.HashMap;

  12:  import java.util.Map;

  13:  import java.util.Set;

  14:  

  15:  public class KeyValueService extends Service {

  16:  

  17:      private static final String TAG = "KeyValueService";

  18:      private final Map<String, String> storage;

  19:  

  20:      public class LocalBinder extends Binder {

  21:          public KeyValueService getService() {

  22:              return KeyValueService.this;

  23:          }

  24:      }

  25:  

  26:      private final IBinder binder = new LocalBinder();

  27:  

  28:      public KeyValueService() {

  29:          storage = new HashMap<>();

  30:      }

  31:  

  32:      @Override

  33:      public void onCreate() {

  34:          super.onCreate();

  35:          Log.d(TAG, "KeyValueService created");

  36:      }

  37:  

  38:      @Nullable

  39:      @Override

  40:      public IBinder onBind(Intent intent) {

  41:          Log.d(TAG, "KeyValueService bound");

  42:          return binder;

  43:      }

  44:  

  45:      @Override

  46:      public int onStartCommand(Intent intent, int flags, int startId) {

  47:          Log.d(TAG, "KeyValueService started");

  48:          return START_STICKY;

  49:      }

  50:  

  51:      public void put(String key, String value) {

  52:          Log.d(TAG, "Putting key: " + key + ", value: " + value);

  53:          storage.put(key, value);

  54:      }

  55:  

  56:      public String get(String key) {

  57:          Log.d(TAG, "Getting key: " + key);

  58:          return storage.get(key);

  59:      }

  60:  

  61:      public void remove(String key) {

  62:          Log.d(TAG, "Removing key: " + key);

  63:          storage.remove(key);

  64:      }

  65:  

  66:      public boolean contains(String key) {

  67:          Log.d(TAG, "Checking if contains key: " + key);

  68:          return storage.containsKey(key);

  69:      }

  70:  

  71:      public Set<String> list() {

  72:          Log.d(TAG, "Listing keys");

  73:          return storage.keySet();

  74:      }

  75:  }

  76: