Try adding these permissions.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Android 6.0 Marshmallow introduces a new model for handling
permissions, which streamlines the process for users when they install
and upgrade apps. Provided you're using version 8.1 or later of Google
Play services, you can configure your app to target the Android 6.0
Marshmallow SDK and use the new permissions model.
If your app supports the new permissions model, the user does not have
to grant any permissions when they install or upgrade the app.
Instead, the app must request permissions when it needs them at
runtime, and the system shows a dialog to the user asking for the
permission.
To learn more, see the documentation for Android 6.0 Marshmallow and
the changes you must make to your app for the new permissions model.
Google has added WebChromeClient.onShowFileChooser. They even provide a way to automatically generate the file chooser intent so that it uses the input accept mime types.
Implement it in this way (from an answer by weiyin):
public class MyWebChromeClient extends WebChromeClient {
// reference to activity instance. May be unnecessary if your web chrome client is member class.
private MyActivity myActivity;
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
// make sure there is no existing message
if (myActivity.uploadMessage != null) {
myActivity.uploadMessage.onReceiveValue(null);
myActivity.uploadMessage = null;
}
myActivity.uploadMessage = filePathCallback;
Intent intent = fileChooserParams.createIntent();
try {
myActivity.startActivityForResult(intent, MyActivity.REQUEST_SELECT_FILE);
} catch (ActivityNotFoundException e) {
myActivity.uploadMessage = null;
Toast.makeText(myActivity, "Cannot open file chooser", Toast.LENGTH_LONG).show();
return false;
}
return true;
}
}
public class MyActivity extends ... {
public static final int REQUEST_SELECT_FILE = 100;
public ValueCallback<Uri[]> uploadMessage;
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == REQUEST_SELECT_FILE) {
if (uploadMessage == null) return;
uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
uploadMessage = null;
}
}
}
}
Make sure to compile the app with API 21+. And this will work on all the platforms as you mention on your gradle.
