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Thread: Display string and/or sensor values

  1. #1
    Junior Member
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    Question Display string and/or sensor values

    Good day,

    During my study on java/android/esp32 I found it difficult to have my sensor values displayed on my mobile screen.

    See my listing.
    It appeared that only the last value is displayed on the screen.
    My wish is to have these values all printed on the screen . Tempbu, tempin, humidity amd air press.


    [quote]
    <?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayo ut xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">



    <TextView
    android:id="@+id/text_view_tempbu"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="12dp"
    android:layout_marginLeft="12dp"
    android:layout_marginTop="32dp"
    android:layout_marginEnd="232dp"
    android:layout_marginRight="232dp"
    android:layout_marginBottom="694dp"
    android:text="tempbu"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.338"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />

    <TextView
    android:id="@+id/text_view_tempin"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="32dp"
    android:layout_marginLeft="32dp"
    android:layout_marginTop="52dp"
    android:layout_marginEnd="232dp"
    android:layout_marginRight="232dp"
    android:layout_marginBottom="694dp"
    android:text="tempin"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="1.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.100000024" />
    [unquote]

    [quote]
    <?xml version="1.0" encoding="UTF-8" ?>
    <resources>
    <string name="app_name">OkHttprequestexample</string>
    <string name="tempbu">tempbu</string>
    <string name="tempin">tempin</string>
    <string name="hum">hum</string>
    <string name="pres">pres</string>
    </resources>
    [unquote]

    [quote]
    package com.example.okhttprequestexample;

    import androidx.appcompat.app.AppCompatActivity;
    import android.os.Bundle;
    import android.widget.TextView;
    import java.lang.String;
    import java.io.IOException;
    import okhttp3.Call;
    import okhttp3.Callback;
    import okhttp3.OkHttpClient;
    import okhttp3.Request;
    import okhttp3.Response;


    public class MainActivity extends AppCompatActivity {

    private TextView mTextViewResult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTextViewResult = findViewById(R.id.text_view_tempbu);

    OkHttpClient client = new OkHttpClient();

    String url = "http://192.168.2.11";

    Request request = new Request.Builder()
    .url(url)
    .build();

    client.newCall(request).enqueue(new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
    e.printStackTrace();
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
    if (response.isSuccessful()) {
    final String myResponse = response.body().string();

    MainActivity.this.runOnUiThread(new Runnable() {
    @Override
    public void run() {

    // Temperatuur buiten ref. Temperatuur voor index

    int index_tempbu = myResponse.indexOf("Temperature");
    // System.out.println("index of substring" + index_tempbu);
    String tempbu = myResponse.substring(index_tempbu - 102, index_tempbu - 97);
    // System.out.println(myResponse.substring(index_temp bu - 102, index_tempbu - 97));
    mTextViewResult.setText(myResponse.subSequence(ind ex_tempbu - 102, index_tempbu - 97));
    // mTextViewResult.setText(tempbu);


    // Temperatuur binnen tempin ref. Humidity voor index

    int index_tempin = myResponse.indexOf("Humidity");
    // System.out.println("index of substring" + index_tempin);
    String tempin = myResponse.substring(index_tempin - 98, index_tempin - 93);
    // System.out.println(myResponse.substring(index_temp in - 98, index_tempin - 93));
    // mTextViewResult.setText(myResponse.subSequence(ind ex_tempin - 98, index_tempin - 93));
    // mTextViewResult.setText(tempin);


    // Humidity

    // int index_hum = myResponse.indexOf("&#");
    // System.out.println("index of substring" + index_hum);
    // String hum = myResponse.substring(index_hum - 37, index_hum - 32);
    // System.out.println(myResponse.substring(index_hum - 37, index_hum - 32));
    // mTextViewResult.setText(myResponse.subSequence(ind ex_hum - 37, index_hum - 32));
    // mTextViewResult.setText(hum);


    // Luchtdruk

    // int index_pres = myResponse.indexOf("hPa");
    // System.out.println("index of substring" + index_pres);
    // String pres = myResponse.substring(index_pres - 39, index_pres - 32);
    // System.out.println(myResponse.substring(index_pres - 39, index_pres - 32));
    // mTextViewResult.setText(myResponse.subSequence(ind ex_pres - 39, index_pres - 32));
    // mTextViewResult.setText(pres);


    }

    });


    }

    }

    });

    }

    [unquote]

    my screen looks like

    5.00 which is the buitentemp

    tempin

    hum
    pres

    The last three will not show there figures???


    Any answer which help is welcome.

    Like to hear,
    ilioSS

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Display string and/or sensor values

    Please edit your post and wrap your code with code tags:

    [code]
    **YOUR CODE GOES HERE**
    [/code]

    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Junior Member
    Join Date
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    Default Re: Display string and/or sensor values

    Hello,

    Solved this question.
    I made for each sensor data a private class.
    Now it is possible to display the valeus.
    Kind regards,
    ilioSS

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