I have spent time searching in Google how to upload files through WebView and if I have found a way to do it works excellent pages that do not need to log in, but my page I want to use must first log in and then upload the file and when you log in the page falls and never starts. this is es code
public class MainActivity extends AppCompatActivity {
private WebView webView;
private ValueCallback<Uri[]> mUploadMessage;
private FilePickerDialog dialog;
private String LOG_TAG = "DREG";
private Uri[] results;
private String COMPLAIN_URL="https://aulavirtual.uleam.edu.ec/xisce/principal/";
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = findViewById(R.id.webview);
WebSettings webSettings = webView.getSettings();
webSettings.setAppCacheEnabled(true);
webSettings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webSettings.setJavaScriptEnabled(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setAllowFileAccess(true);
webView.setWebViewClient(new PQClient());
webView.setWebChromeClient(new PQChromeClient());
if (Build.VERSION.SDK_INT >= 19) {
webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
} else {
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
webView.loadUrl(COMPLAIN_URL);
}
private void openFileSelectionDialog() {
if (null != dialog && dialog.isShowing()) {
dialog.dismiss();
}
//Create a DialogProperties object.
final DialogProperties properties = new DialogProperties();
//Instantiate FilePickerDialog with Context and DialogProperties.
dialog = new FilePickerDialog(MainActivity.this, properties);
dialog.setTitle("Select a File");
dialog.setPositiveBtnName("Select");
dialog.setNegativeBtnName("Cancel");
properties.selection_mode = DialogConfigs.MULTI_MODE; // for multiple files
// properties.selection_mode = DialogConfigs.SINGLE_MODE; // for single file
properties.selection_type = DialogConfigs.FILE_SELECT;
//Method handle selected files.
dialog.setDialogSelectionListener(new DialogSelectionListener() {
@Override
public void onSelectedFilePaths(String[] files) {
results = new Uri[files.length];
for (int i = 0; i < files.length; i++) {
String filePath = new File(files[i]).getAbsolutePath();
if (!filePath.startsWith("file://")) {
filePath = "file://" + filePath;
}
results[i] = Uri.parse(filePath);
Log.d(LOG_TAG, "file path: " + filePath);
Log.d(LOG_TAG, "file uri: " + String.valueOf(results[i]));
}
mUploadMessage.onReceiveValue(results);
mUploadMessage = null;
}
});
dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialogInterface) {
if (null != mUploadMessage) {
if (null != results && results.length >= 1) {
mUploadMessage.onReceiveValue(results);
} else {
mUploadMessage.onReceiveValue(null);
}
}
mUploadMessage = null;
}
});
dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialogInterface) {
if (null != mUploadMessage) {
if (null != results && results.length >= 1) {
mUploadMessage.onReceiveValue(results);
} else {
mUploadMessage.onReceiveValue(null);
}
}
mUploadMessage = null;
}
});
dialog.show();
}
public class PQChromeClient extends WebChromeClient {
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
// Double check that we don't have any existing callbacks
if (mUploadMessage != null) {
mUploadMessage.onReceiveValue(null);
}
mUploadMessage = filePathCallback;
openFileSelectionDialog();
return true;
}
}
//Add this method to show Dialog when the required permission has been granted to the app.
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
switch (requestCode) {
case FilePickerDialog.EXTERNAL_READ_PERMISSION_GRANT: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (dialog != null) {
openFileSelectionDialog();
}
} else {
//Permission has not been granted. Notify the user.
Toast.makeText(MainActivity.this, "Permission is Required for getting list of files", Toast.LENGTH_SHORT).show();
}
}
}
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Check if the key event was the Back button and if there's history
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
// If it wasn't the Back key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
public class PQClient extends WebViewClient {
ProgressBar progressDialog;
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// If url contains mailto link then open Mail Intent
if (url.contains("mailto:")) {
// Could be cleverer and use a regex
//Open links in new browser
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
// Here we can open new activity
return true;
} else {
// Stay within this webview and load url
view.loadUrl(url);
return true;
}
}
// Show loader on url load
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// Then show progress Dialog
// in standard case YourActivity.this
if (progressDialog == null) {
progressDialog = findViewById(R.id.progressBar);
progressDialog.setVisibility(View.VISIBLE);
}
}
// Called when all page resources loaded
public void onPageFinished(WebView view, String url) {
webView.loadUrl("javascript:(function(){ " +
"document.getElementById('android-app').style.display='none';})()");
try {
// Close progressDialog
progressDialog.setVisibility(View.GONE);
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
}