Question by winwin0108 · Mar 27, 2017 at 07:32 PM · android androidplugin service sensor

Cannot get value from sensor as Android background service

I need to build an android app which needs to get step sensor in background, so that even the app is closed it can still return the step count.

I make a java plug-in with android studio. I can get the static value from it. However the sensor value has to be non-static and sharedprefs also need to be non-static. Is that I cannot get non-static value from java class?

Here is the code:

(Java Plug-in On Android Studio Side)

 public class My_Plugin extends Activity {
 
    //Testing: Unity can get the words successfully
     public static String getMessage()
     { return "Hello Android!"; }
 
     private SensorManager mgr;
     private Sensor step_counter_sensor;
     private Sensor step_detector_sensor;
 
     SharedPreferences settings;
     String pref = "pref";
     SharedPreferences.Editor editor;
 
    //function call by Unity
     public float checkPrefs(){
           return settings.getFloat("Checking", 9999f);
      }
 
 
 @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
        //save a value "100" which pass to Unity
         settings = getSharedPreferences(pref,0);
         editor = settings.edit();
         editor.putFloat("Checking", 100);
         editor.apply();
 
        //Sensor management
        ......

(App on Unity side)

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 
 public class callPlugin : MonoBehaviour
 {
 
     public Text txt;
     public Text txt2;
 
     AndroidJavaClass pluginClass;
 
     void Start()
     {
         pluginClass = new AndroidJavaClass("kanwwong2.scm.myplugin.My_Plugin");
 
                 // call testing function: Success
         txt.text = pluginClass.CallStatic<string>("getMessage");
 
                // call to get value: Fail
                // it should return 100 if succeed, but it gives me 0
         txt2.text = pluginClass.Call<float> ("checkPrefs").ToString();
 
     }
 }

I cannot get the sensor value directly nor get the shared pref value. Can anyone help me please? What should I do in order to get the step count?

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