Apache EDGENT on Android issue

[Arun KN <re...@gmail.com>]

Hi Sir,

I am hobby developer and  have experience in IoT and embedded product, i
got to know Edgent SDK while one of the search, i was very much impressed
with the feature...meanwhile i tried to develop a small app on Android App
to get sensor data from Android phone...am able to clear all errors related
to dependency on Android studio and generate APK , install  and run app on
Mobile phone ...here in code(pasted below) am trying to print sensor data
in TextView of App, once i run app am getting output on TextView is
"ConnectStream alias=null tags=[] " ...i am expecting sensor data of
Acceleration,but am getting above mentioned output,
Please help me in resolving this issue ...why am getting  "ConnectStream
alias=null tags=[] " .....provide me solution to get proper data from
sensor.so that i can go further in my exploring EDGENT.

my Android App code is below :

package com.example.temperaturesensor;

import android.support.v7.app.AppCompatActivity;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import org.apache.edgent.providers.direct.DirectProvider;
import org.apache.edgent.topology.TStream;
import org.apache.edgent.topology.Topology;

import java.util.concurrent.TimeUnit;

public class MainActivity extends AppCompatActivity {

  /*  private val findViewById; */

    private static final String TAG = "EdgeNT Sample App";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView resultsTextView = (TextView)
findViewById(R.id.resultsTextView);


        TempSensor sensor = new TempSensor(getApplicationContext());
        DirectProvider provider = new DirectProvider();
        Topology t = provider.newTopology("EdgentSampleApp");
        Log.d("Sensor Data",":Pritnt Sensor Data "+sensor.toString());
        TStream<Double> tempReadings = t.poll(sensor,1, TimeUnit.SECONDS);
        TStream<Double> filterReadings = tempReadings.filter(reading->
reading < 10 || reading > 20);
        Log.i("Sensor Sample", "Printing temperature values:
"+filterReadings.print());
   //     resultsTextView.setText(filterReadings.asString().toString());
        resultsTextView.setText(filterReadings.asString().toString());
        filterReadings.print();

        provider.submit(t);
    }
}

Awaiting for your response.

Thanks & Regards,

Arun Kumar N

Re: Apache EDGENT on Android issue

[Christofer Dutz <ch...@c-ware.de>]

Hi Arun,

I guess your problem is that you are printing out the stream element and not the content of the stream.
As the API documentation states, asString converts an object stream to a stream of strings. 
I guess you should use this instead:

filterReadings.map(value -> 
            resultsTextView.setText(value.toString());

Hope that helps.

Chris.


Am 05.04.19, 07:14 schrieb "Arun KN" <re...@gmail.com>:

    Hi Sir,
    
    I am hobby developer and  have experience in IoT and embedded product, i
    got to know Edgent SDK while one of the search, i was very much impressed
    with the feature...meanwhile i tried to develop a small app on Android App
    to get sensor data from Android phone...am able to clear all errors related
    to dependency on Android studio and generate APK , install  and run app on
    Mobile phone ...here in code(pasted below) am trying to print sensor data
    in TextView of App, once i run app am getting output on TextView is
    "ConnectStream alias=null tags=[] " ...i am expecting sensor data of
    Acceleration,but am getting above mentioned output,
    Please help me in resolving this issue ...why am getting  "ConnectStream
    alias=null tags=[] " .....provide me solution to get proper data from
    sensor.so that i can go further in my exploring EDGENT.
    
    my Android App code is below :
    
    package com.example.temperaturesensor;
    
    import android.support.v7.app.AppCompatActivity;
    import android.app.Activity;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.TextView;
    
    import org.apache.edgent.providers.direct.DirectProvider;
    import org.apache.edgent.topology.TStream;
    import org.apache.edgent.topology.Topology;
    
    import java.util.concurrent.TimeUnit;
    
    public class MainActivity extends AppCompatActivity {
    
      /*  private val findViewById; */
    
        private static final String TAG = "EdgeNT Sample App";
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            TextView resultsTextView = (TextView)
    findViewById(R.id.resultsTextView);
    
    
            TempSensor sensor = new TempSensor(getApplicationContext());
            DirectProvider provider = new DirectProvider();
            Topology t = provider.newTopology("EdgentSampleApp");
            Log.d("Sensor Data",":Pritnt Sensor Data "+sensor.toString());
            TStream<Double> tempReadings = t.poll(sensor,1, TimeUnit.SECONDS);
            TStream<Double> filterReadings = tempReadings.filter(reading->
    reading < 10 || reading > 20);
            Log.i("Sensor Sample", "Printing temperature values:
    "+filterReadings.print());
       //     resultsTextView.setText(filterReadings.asString().toString());
            resultsTextView.setText(filterReadings.asString().toString());
            filterReadings.print();
    
            provider.submit(t);
        }
    }
    
    Awaiting for your response.
    
    Thanks & Regards,
    
    Arun Kumar N