Android Webview : cookie, input file not working - webview

Question

It's been two weeks that I'm struggling to make my webbased application working on android.
It is a simple data entry application. In chrome browser, it works like a charm, but in android, which is the final deployment options, i's a nightmare.
(1) It won't store any cookie
(2) < input type=file >, won't open file browser
(3) toast won't work
(3) unable to make AVD working, and cannot debug anythings
Any help could be appreciated.
MainActivity.java
package com.example.webview;
import ...
public class MainActivity extends AppCompatActivity {
WebView webView;
String TAG = "MainActivity";
Context context;
private final String host = "sercom-farm.net";
private static final int STORAGE_PERMISSION_CODE = 123;
private final static int FILECHOOSER_RESULTCODE=1;
private ValueCallback<Uri> mUploadMessage;
public ValueCallback<Uri[]> uploadMessage;
public static final int REQUEST_SELECT_FILE = 100;
final Context myApp = this;
final class MyWebChromeClient extends WebChromeClient {
public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
new AlertDialog.Builder(myApp)
.setTitle("Sercom Farm App")
.setMessage(message)
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
result.confirm();
}
})
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
result.cancel();
}
})
.create()
.show();
return true;
}
}
private static class LocalContentWebViewClient extends WebViewClientCompat {
private final WebViewAssetLoader mAssetLoader;
LocalContentWebViewClient(WebViewAssetLoader assetLoader) {
mAssetLoader = assetLoader;
}
#Override
#RequiresApi(21)
public WebResourceResponse shouldInterceptRequest(WebView view,
WebResourceRequest request) {
return mAssetLoader.shouldInterceptRequest(request.getUrl());
}
#Override
#SuppressWarnings("deprecation") // to support API < 21
public WebResourceResponse shouldInterceptRequest(WebView view,
String url) {
return mAssetLoader.shouldInterceptRequest(Uri.parse(url));
}
}
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebAction();
}
public void WebAction() {
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setAllowFileAccessFromFileURLs(true);
webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
webView.loadUrl("file:///android_asset/m2.html");
webView.addJavascriptInterface(new WebViewJavaScriptInterface(this), "app");
CookieManager cookieManager = CookieManager.getInstance();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{ cookieManager.setAcceptThirdPartyCookies(webView,true); }
else { cookieManager.setAcceptCookie(true); }
}
public void onBackPressed() {
// TODO Auto-generated method stub
webView.loadUrl("javascript:Fback() ;") ;
}
public class WebViewJavaScriptInterface{
private Context context;
/*
* Need a reference to the context in order to sent a post message
*/
public WebViewJavaScriptInterface(Context context){
this.context = context;
}
/*
* This method can be called from Android. #JavascriptInterface
* required after SDK version 17.
*/
#JavascriptInterface
public void makeToast(String message, boolean lengthLong){
Toast.makeText(context, message, (lengthLong ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT)).show();
}
}
}
I'm using
Android Studio Chipmunk | 2021.2.1 Patch 1
Build #AI-212.5712.43.2112.8609683, built on May 18, 2022
Runtime version: 11.0.12+7-b1504.28-7817840 amd64
VM: OpenJDK 64-Bit Server VM by Oracle Corporation
Windows 7 6.1
GC: G1 Young Generation, G1 Old Generation
Memory: 1280M
Cores: 2
Registry: external.system.auto.import.disabled=true