Android Question Upload files with WebView

[tiagovsilva]

Hi,
Im trying to upload files with WebView using this example: https://www.b4x.com/android/forum/threads/upload-files-with-webview.98623/

Sub ShowFile_Chooser (FilePathCallback As Object, FileChooserParams As Object)
    cc.Initialize("CC")
    cc.Show("*/*", "Choose File")
    Wait For CC_Result (Success As Boolean, Dir As String, FileName As String)
    Dim jo As JavaObject = Me
    If Success Then
        Log(FileName)
        File.Copy(Dir, FileName, Starter.Provider.SharedFolder, "TempFile")
        jo.RunMethod("SendResult", Array(Starter.Provider.GetFileUri("TempFile"), FilePathCallback))
    Else
        jo.RunMethod("SendResult", Array(Null, FilePathCallback))
    End If
End Sub

#if Java
import android.webkit.*;
import android.webkit.WebChromeClient.*;
import android.net.*;
public static void SendResult(Uri uri, ValueCallback<Uri[]> filePathCallback) {
    BA.Log("value = " + uri);
    if (uri != null)
        filePathCallback.onReceiveValue(new Uri[] {uri});
    else
        filePathCallback.onReceiveValue(null);
     
}
public static class MyChromeClient extends WebChromeClient {
[USER=69643]@override[/USER]
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback,
            FileChooserParams fileChooserParams) {
        processBA.raiseEventFromUI(this, "showfile_chooser", filePathCallback, fileChooserParams);
        return true;
    }
    }
#End If

I can select the file but the html input inside webview doesnt get it.
These messeges appear in the B4A Logs:

sending message to waiting queue (OnActivityResult)
running waiting messages (1)

Can anyone help me?

 

[DonManfred]

Upload files with WebView

 

[tiagovsilva]

I'm aware of that thread, it's the one in the url

 

[Erel]

Put a breakpoint after the Wait For line. Is it called?

 

[tiagovsilva]

I think it is called, the

Log(FileName)

prints the filename to the console.

And in Java too:

BA.Log("value = " + uri);

 

[tiagovsilva]

In debug mode, it gives this errors when opening the App

Logger connected to: Xiaomi Mi 9 SE
--------- beginning of main
Copying updated assets files (2)
--------- beginning of crash
java.lang.RuntimeException: Unable to create service educadores.cadernetadigital.starter: java.lang.RuntimeException: java.net.SocketException: Connection reset
at android.app.ActivityThread.handleCreateService(ActivityThread.java:4023)
at android.app.ActivityThread.access$1600(ActivityThread.java:224)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1903)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7562)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.RuntimeException: java.net.SocketException: Connection reset
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:175)
at educadores.cadernetadigital.starter.onCreate(starter.java:48)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:4011)
... 8 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:215)
at java.net.SocketInputStream.read(SocketInputStream.java:144)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:248)
at java.io.BufferedInputStream.read(BufferedInputStream.java:267)
at java.io.DataInputStream.readByte(DataInputStream.java:268)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:344)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)

 

[Erel]

It is possible that the process was killed while the app was in the background. There is a developer option, in the device settings, that make the OS very aggressive with killing processes. Make sure that it is not set.

Run you app in release mode and post the logs.

 

[tiagovsilva]

I ran the app in release mode, here's the logs:

Logger connected to: Xiaomi Mi 9 SE
--------- beginning of main
*** Service (starter) Create ***
Using FileProvider? true
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
--------- beginning of system
*** Service (firebasemessaging) Create ***
** Service (firebasemessaging) Start **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
** Activity (main) Pause, UserClosed = false **
sending message to waiting queue (OnActivityResult)
running waiting messages (1)
content://com.android.providers.media.documents/document/image%3A66687
value = content://educadores.cadernetadigital.provider/name/TempFile
** Activity (main) Resume **

 

[Erel]

It worked properly.

 

[tiagovsilva]

The HTML input element didnt get it..
I made a similar app in B4I and the same HTML works fine.

 

[Erel]

Have you added the manifest editor code related to FileProvider?

 

[tiagovsilva]

Yes

AddManifestText(<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="18" />)

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="$PACKAGE$.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
  android:name="android.support.FILE_PROVIDER_PATHS"
  android:resource="@xml/provider_paths"/>
  </provider>)
CreateResource(xml, provider_paths,
   <files-path name="name" path="shared" />)

 

[Erel]

Does the example as-is work when you run it?

 

[tiagovsilva]

I tested it right now, the example works

Is there any way to print the webview logs without WebViewExtras's
addWebChromeClient function?

 

[Erel]

Try to add this to the inline code:

[USER=69643]@override[/USER]
    public boolean onConsoleMessage(android.webkit.ConsoleMessage consoleMessage) {
     
 BA.Log(consoleMessage.message());
        return true;
    }

 

[tiagovsilva]

Should I add this to the end of #if java section? It's not printing

I'm sorry but can you show me an example?

 

[Erel]

#if Java
import android.webkit.*;
import android.webkit.WebChromeClient.*;
import android.net.*;
public static void SendResult(Uri uri, ValueCallback<Uri[]> filePathCallback) {
BA.Log("value = " + uri);
if (uri != null)
filePathCallback.onReceiveValue(new Uri[] {uri});
else
filePathCallback.onReceiveValue(null);

}
public static class MyChromeClient extends WebChromeClient {
@override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback,
FileChooserParams fileChooserParams) {
processBA.raiseEventFromUI(this, "showfile_chooser", filePathCallback, fileChooserParams);
return true;
}
@override
    public boolean onConsoleMessage(android.webkit.ConsoleMessage consoleMessage) {
     
 BA.Log(consoleMessage.message());
        return true;
    }


}
#End If

 

[tiagovsilva]

I printed on the JS side the following:

let file = files[0];

console.log("File Object:", file);
console.log("Name:", file.name);
console.log("Type:", file.type);
console.log('Size:', file.size);

The file object does not have the type property

File Object: [object File]
Name: TempFile
Type:
Size: 442652

Do you know how to solve this?

 

[Erel]

As I wrote, the file is being sent.

I don't see any API for setting the file type.

 

[tiagovsilva]

I dont know if this makes sense but I wanted to set the file type on Activity Resume, like this:

Dim i As Intent
i = Activity.GetStartingIntent
i.setType(any_file_type)

On Activity Resume, after selecting the file, the intent has no extras and the intent action is MAIN

Sub Activity_Resume
    Dim i As Intent
    i = Activity.GetStartingIntent

    Log(i.ExtrasToString())
    Log(i.Action)   
End Sub

** Activity (main) Pause, UserClosed = false **
sending message to waiting queue (OnActivityResult)
running waiting messages (1)
content://com.android.providers.media.documents/document/image%3A66638
value = content://educadores.cadernetadigital.provider/name/66638
** Activity (main) Resume **
no extras
android.intent.action.MAIN

Is this normal?