Android Question java.lang.reflect.InvocationTargetException

Angelo Messina · Jan 18, 2024

Hi everyone, I can't understand why
in debug it works but once compiled on device it generates this java.lang.reflect.InvocationTargetException error

Brian Dean · Jan 18, 2024

Why do you think that there is some connection between the error message and the screenshot that you have posted? And when you say "once compiled on device" do you mean running in Release mode? And if so what is the full error message?

Angelo Messina · Jan 18, 2024

Brian Dean said:
Why do you think that there is some connection between the error message and the screenshot that you have posted? And when you say "once compiled on device" do you mean running in Release mode? And if so what is the full error message?

Logger connesso a: Xiaomi M2007J3SG
--------- beginning of main
running waiting messages (1)
** Activity (main) Resume **
** Activity (main) Create (first time) **
** Activity (main) Resume **
*** Receiver (httputils2service) Receive (first time) ***
(Http client initialized with accept all option.)
JobName = job4, Success = true
main_creaweb (java line: 1651)
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:132)
at com.DataLogger.fotovoltaico.main._creaweb(main.java:1651)
at com.DataLogger.fotovoltaico.main._loadtable(main.java:2577)
at com.DataLogger.fotovoltaico.main._b4xtable1_cellclicked(main.java:1114)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1114)
at anywheresoftware.b4a.keywords.Common.CallSubNew3(Common.java:1077)
at com.DataLogger.fotovoltaico.b4xtable$ResumableSub_CellClicked.resume(b4xtable.java:638)
at com.DataLogger.fotovoltaico.b4xtable._cellclicked(b4xtable.java:409)
at com.DataLogger.fotovoltaico.b4xtable._lbl_click(b4xtable.java:2002)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7753)
at android.view.View.performClickInternal(View.java:7730)
at android.view.View.access$3700(View.java:861)
at android.view.View$PerformClick.run(View.java:29146)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:210)
at android.os.Looper.loop(Looper.java:299)
at android.app.ActivityThread.main(ActivityThread.java:8293)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:556)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1045)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1668)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:389)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:230)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:212)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:436)
at java.net.Socket.connect(Socket.java:646)
at com.android.okhttp.internal.Platform.connectSocket(Platform.java:182)
at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:145)
at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:116)
at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:186)
at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128)
at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:248)
at com.DataLogger.fotovoltaico.main.GetData(main.java:3541)
... 28 more
java.lang.reflect.InvocationTargetException

Brian Dean · Jan 18, 2024

Do you have a subroutine called "creaweb"? If so it looks to be where the error occurs. Add some Log statements so that you can locate it. Even better, post some code so that people can understand what you are trying to achieve and where you might be going wrong.

Angelo Messina · Jan 18, 2024

Brian Dean said:
Do you have a subroutine called "creaweb"? If so it looks to be where the error occurs. Add some Log statements so that you can locate it. Even better, post some code so that people can understand what you are trying to achieve and where you might be going wrong.

B4X:

Sub CreaWeb(Tipo As String)

    IndiceGenerale = asJava(Me).RunMethod("GetData",Array(url,"ID","-1"))
    Private HtmlCSS As String = $"
        table {width: 100%;border: 1px solid #cef;text-align: left; }
        th { font-weight: bold;    background-color: #acf;    border-bottom: 1px solid #cef; }
        td,th {    padding: 4px 5px; }
        .odd {background-color: #def; } 
        .odd td {border-bottom: 1px solid #cef; }
        a { text-decoration:none; color: #000;}"$        
    Dim sb As StringBuilder
    sb.Initialize
    sb.Append("<html><body>").Append(CRLF)
    sb.Append("<style type='text/css'>").Append(HtmlCSS).Append("</style>").Append(CRLF)
    sb.Append("<table><thead><tr>").Append(CRLF)
    sb.Append("<th>").Append("Anno").Append("</th>")
    sb.Append("<th>").Append("Mese").Append("</th>")
    sb.Append("<th>").Append("Giorno").Append("</th>")
    sb.Append("<th>").Append("Kwh").Append("</th>")
    sb.Append("</thead>")
    sb.Append("</tr>").Append(CRLF)
    Dim row As Int
    For Each colroot As Map In PrendiKwhProdotti(Tipo)
        Dim anno As String = colroot.Get("anno")
        Dim mese As String = colroot.Get("mese")
        Dim giorno As String = colroot.Get("giorno")
        Dim kwh As String = colroot.Get("kwh")
        Dim NumRiga As Int=0
        Dim row As Int
        Dim Riga As String
        Riga=anno&","&mese&","&giorno&","&kwh
        Dim components() As String
'        Log(components)
        components = Regex.Split(",", Riga) 'returns: "abc", "def", "", "ghi"
        For i = 0 To components.Length-1
            If row Mod 2 = 0 Then
                sb.Append("<tr>")
            Else
                sb.Append("<tr class='odd'>")
            End If
            For i = 0 To components.Length -1
                sb.Append("<td>")
                sb.Append(components(i))
                sb.Append("</td>")
            Next
            sb.Append("</tr>").Append(CRLF)
            row = row + 1
        Next
    Next
    sb.Append("</table></body></html>")
    WebView1.Enabled=True
    WebView1.Visible=True
    WebView1.LoadHtml(sb.ToString)
End Sub

Sub PrendiKwhProdotti(tipologia As String) As List
    If tipologia="ASC" Then
        tipologia="999999"
    Else
        tipologia="888888"
    End If
'    PublicData.Initialize
    Dim Risposta As String = asJava(Me).RunMethod("GetJson",Array(url,tipologia))
    Dim parser As JSONParser
    parser.Initialize(Risposta)
    Return parser.NextArray
End Sub

Angelo Messina · Jan 18, 2024

Angelo Messina said:

B4X:

Sub CreaWeb(Tipo As String)

    IndiceGenerale = asJava(Me).RunMethod("GetData",Array(url,"ID","-1"))
    Private HtmlCSS As String = $"
        table {width: 100%;border: 1px solid #cef;text-align: left; }
        th { font-weight: bold;    background-color: #acf;    border-bottom: 1px solid #cef; }
        td,th {    padding: 4px 5px; }
        .odd {background-color: #def; }
        .odd td {border-bottom: 1px solid #cef; }
        a { text-decoration:none; color: #000;}"$       
    Dim sb As StringBuilder
    sb.Initialize
    sb.Append("<html><body>").Append(CRLF)
    sb.Append("<style type='text/css'>").Append(HtmlCSS).Append("</style>").Append(CRLF)
    sb.Append("<table><thead><tr>").Append(CRLF)
    sb.Append("<th>").Append("Anno").Append("</th>")
    sb.Append("<th>").Append("Mese").Append("</th>")
    sb.Append("<th>").Append("Giorno").Append("</th>")
    sb.Append("<th>").Append("Kwh").Append("</th>")
    sb.Append("</thead>")
    sb.Append("</tr>").Append(CRLF)
    Dim row As Int
    For Each colroot As Map In PrendiKwhProdotti(Tipo)
        Dim anno As String = colroot.Get("anno")
        Dim mese As String = colroot.Get("mese")
        Dim giorno As String = colroot.Get("giorno")
        Dim kwh As String = colroot.Get("kwh")
        Dim NumRiga As Int=0
        Dim row As Int
        Dim Riga As String
        Riga=anno&","&mese&","&giorno&","&kwh
        Dim components() As String
'        Log(components)
        components = Regex.Split(",", Riga) 'returns: "abc", "def", "", "ghi"
        For i = 0 To components.Length-1
            If row Mod 2 = 0 Then
                sb.Append("<tr>")
            Else
                sb.Append("<tr class='odd'>")
            End If
            For i = 0 To components.Length -1
                sb.Append("<td>")
                sb.Append(components(i))
                sb.Append("</td>")
            Next
            sb.Append("</tr>").Append(CRLF)
            row = row + 1
        Next
    Next
    sb.Append("</table></body></html>")
    WebView1.Enabled=True
    WebView1.Visible=True
    WebView1.LoadHtml(sb.ToString)
End Sub

Sub PrendiKwhProdotti(tipologia As String) As List
    If tipologia="ASC" Then
        tipologia="999999"
    Else
        tipologia="888888"
    End If
'    PublicData.Initialize
    Dim Risposta As String = asJava(Me).RunMethod("GetJson",Array(url,tipologia))
    Dim parser As JSONParser
    parser.Initialize(Risposta)
    Return parser.NextArray
End Sub

Java:

public static String GetJson(String baseUrl,String Tipo) throws IOException {
    // Creazione della connessione al server
    String serverUrl = baseUrl+"?ID="+Tipo;   //" 999999";
    System.out.println("Query " + serverUrl);
    URL url = new URL(serverUrl);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");

    // Lettura della risposta dal server
    BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String inputLine;
    StringBuilder response = new StringBuilder();
    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();
    // Visualizzazione della risposta come stringa JSON
    System.out.println("Risposta JSON: " + response.toString());
    // Chiusura della connessione
    connection.disconnect();
    return response.toString();
}

Daestrum · Jan 18, 2024

Caused by: android.os.NetworkOnMainThreadException

Are you running any network task on the main thread instead of in a background task?

Angelo Messina · Jan 18, 2024

Daestrum said:
Causato da: android.os.NetworkOnMainThreadException

Si sta eseguendo un'attività di rete nel thread principale anziché in un'attività in background?

Angelo Messina · Jan 18, 2024

so what do you recommend? can you show me the best way
Thank you

Daestrum · Jan 18, 2024

Sorry, I don't do Android, I just googled android.os.NetworkOnMainThreadException and there were several suggestions to prevent this error, but not sure how you would implement in B4A.

Angelo Messina · Jan 18, 2024

Daestrum said:
Sorry, I don't do Android, I just googled android.os.NetworkOnMainThreadException and there were several suggestions to prevent this error, but not sure how you would implement in B4A.

Thank you

Erel · Jan 22, 2024

Delete this completely broken Java code and use OkHttpUtils2.

Android Question java.lang.reflect.InvocationTargetException

Angelo Messina

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Brian Dean

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Angelo Messina

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Brian Dean

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Angelo Messina

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Angelo Messina

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Angelo Messina

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Daestrum

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Angelo Messina

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Erel

B4X founder

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