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I'm trying to build web project using android, from webview. I have a input field of type file <input type="file" > to let user upload files to server, but it seem not to work on android webview, when I tap on the browse button, nothing happens.
Comp.java
package com.gururaju.bbmp;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebChromeClient;
public class Comp extends Activity {
WebView comp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_comp);
WebView myWebView = (WebView) findViewById(R.id.comp);
myWebView.setWebChromeClient(new WebChromeClient());
myWebView.loadUrl("file:///android_asset/comp.html");
}
}
activity_comp.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/comp"
>
</WebView>
</LinearLayout>
comp.html (in assets folder)
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css" href="comp.css">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<h2 align="center">Post your Complaints here</h2>
<form enctype="multipart/form-data" action="" name="complaints" method="POST">
<input class="title" type="text" name="title" placeholder="Enter the Complaint Title" /><br />
<div class="spacer-welcome"></div>
<textarea name="desc" class="desc" placeholder="Your complaint description here..."></textarea><br />
<div class="spacer-welcome1"></div>
<input id="center" type="file" name="image" ><br />
<input class="upload" type="submit" name="submit" value="Submit" >
</form>
</body>
</html>
Any help would be appreciated.
431
Webview class alone does not support file upload on facebook. You need to use both web chrome client and webview client to handle file upload on your android application as shown below. View more details and a working demo
package com.whatsonline.androidphotouploadonfacebook;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.view.ViewGroup;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
/**
* Created by sada on 6/17/2016.
*/
public class upload extends Activity {
WebView web;
private ValueCallback<Uri> mUploadMessage;
private final static int FILECHOOSER_RESULTCODE=1;
LinearLayout ln1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.upload);
web = new WebView(this);
web.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
ln1=(LinearLayout) findViewById(R.id.ln1);
WebSettings settings=web.getSettings();
settings.setJavaScriptEnabled(true);
web.loadUrl("http://www.facebook.com");
web.setWebViewClient(new myWebClient());
web.setWebChromeClient(new WebChromeClient() {
//The undocumented magic method override
//Eclipse will swear at you if you try to put @Override here
// For Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
upload.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}
// For Android 3.0+
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
upload.this.startActivityForResult(
Intent.createChooser(i, "File Browser"),
FILECHOOSER_RESULTCODE);
}
//For Android 4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
upload.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), upload.FILECHOOSER_RESULTCODE);
}
});
ln1.addView(web);
}
public class myWebClient extends WebViewClient
{
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
}
//flipscreen not loading again
@Override
public void onConfigurationChanged(Configuration newConfig){
super.onConfigurationChanged(newConfig);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE){
if (null == mUploadMessage) return;
Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
}
The answer by Riad points into the right direction, but that single callback is not enough to implement.
There are, in total, four hidden API methods that you have to implement. Their usage depends on the Android version. These methods are:
public void openFileChooser(ValueCallback<Uri> uploadMsg)
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType)
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture)
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
You can use the following library which does all these things for you:
https://github.com/delight-im/Android-AdvancedWebView
Alternatively, you may take a look at the source code to see how it's done:
https://github.com/delight-im/Android-AdvancedWebView/blob/master/Source/src/im/delight/android/webview/AdvancedWebView.java
41
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