I created an app with a web view. This web view opens a page with a lot of links to download APKs. The download process goes smoothly, BUT the downloaded apk file doesn't get its original name and extension.
This is my code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tech_news);
techView = (WebView) findViewById(R.id.tech_webView);
techView.getSettings().setJavaScriptEnabled(true);
techView.loadUrl("http://egy-tech-droid.blogspot.com.eg/2015/08/blog-post.html");
// This will handle downloading. It requires Gingerbread, though
final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
// This is where downloaded files will be written, using the package
// name isn't required
// but it's a good way to communicate who owns the directory
final File destinationDir = new File(Environment.getExternalStorageDirectory(), getPackageName());
if (!destinationDir.exists()) {
destinationDir.mkdir(); // Don't forget to make the directory if
// it's not there
}
techView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
techView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimetype, long contentLength) {
Request request = new Request(Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, contentDisposition);
DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "downloading",
// To notify the user that the file
// is being downloaded.
Toast.LENGTH_LONG).show();
}
});
return true;
}
});
}
I want the downloaded file to get its original name and extension, so when the user opens the file later from a file explorer the system recognizes that file as an an apk, not just an unknown file.
Related
This is the code I am using, its pretty basic because its just two buttons (one for download Adobe acrobat and the other one to open the file with it) for simplify the access to a interactive PDF for my workers. The problem is that when I click on the button to open the PDF, Adobe Acrobat says that the file doesn't exist :(
I don't know how to program in Java actually, so if you can do it simple I will be very thankful :( Also Im spanish and my english can be a little bit bad :p
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//Metodo boton descargar adobe acrobat
public void descargar(View view) {
Uri descargarac = Uri.parse("market://details?id=com.adobe.reader&hl");
Intent DescargarAdobeAcrobat = new Intent(ACTION_VIEW, descargarac);
startActivity(DescargarAdobeAcrobat);
}
//Metodo boton descargar adobe acrobat
public void visualizar(View view) {
Uri path = Uri.parse("assets/ruta.pdf"); //This is the file
Intent visualizarpdf = new Intent(Intent.ACTION_VIEW);
visualizarpdf.setDataAndType(path, "application/pdf");
startActivity(visualizarpdf);
}
}
I am trying to load a pdf from my sd onto webview.
I know it is not possible to direct load a pdf in webview. So I have a html file which renders the file and load the pdf.
sample from http://www.worldwidewhat.net/2011/08/render-pdf-files-with-html5/
Android Code:
final WebView webView = (WebView) findViewById(R.id.magazineWebView);
final ProgressBar spinner = (ProgressBar) findViewById(R.id.magazineSpinner);
webView.setBackgroundColor(0xFFFFFFFF);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setSaveFormData(true);
webView.getSettings().setBuiltInZoomControls(mgznCanZoom);
webView.getSettings().setDisplayZoomControls(false);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
spinner.setVisibility(View.GONE);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
String webPath = "http://mysite/demo/pdf-js/index.htm"; //WORKS
String file_name2 = "pdf-js/index.htm"; //LOAD HTML BUT NOT PDF
String file_uri = MAGAZINE_FOLDER + file_name2;
String sdPath = Uri.parse("file://"
+ Environment.getExternalStorageDirectory()
+ file_uri).toString();
webView.loadUrl(sdPath); //webPath
Erros from logcat:
I/chromium: [INFO:CONSOLE(0)] "XMLHttpRequest cannot load file:///storage/emulated/0/MyApp/Magazine/pdf-js/compressed.tracemonkey-pldi-09.pdf. Cross origin requests are only supported for protocol schemes: http, data, chrome, https.", source: file:///storage/emulated/0/MyApp/Magazine/pdf-js/index.htm (0)
I/chromium: [INFO:CONSOLE(52)] "Uncaught TypeError: Cannot read property 'Symbol(Symbol.iterator)' of null", source: file:///storage/emulated/0/MyApp/Magazine/pdf-js/lib/pdf.js (52)
I/AppLifecycle: onActivitySaveInstanceState
But ->
If I store this file in the cloud and load it as above, it will work fine.
Anyone know why this wont load locally ?
Thanks guys.
P.S I know there are lot of these question online. I have looked around and not found a solution.
I am not able to use librarys like this https://github.com/JoanZapata/android-pdfview
I have the following application:
From start the webview is created and will load a local (to the app) HTML file.
This local HTML file contains some javascript that is able to update the HTML when data parsed to it.
Only when i parse data to it the images will not load, however a am able to see the HTML change and see the correct img tags appear with the correct URL's. I tested the javascript and the data that i send to it in the browser and it works.
My app:
private static final String URL = "file:///android_asset/overview.html";
private WebView wView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//Set settings
wView = (WebView) findViewById(R.id.webView);
wView.getSettings().setJavaScriptEnabled(true);
wView.getSettings().setUseWideViewPort(true);
wView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
wView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
//TMP DEBUDDING
wView.setWebContentsDebuggingEnabled(true);
//Create interface called "AppBridge" for JavaScript
wView.addJavascriptInterface(new WebAppInterface(this), "AppBridge");
wView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
view.loadUrl("javascript:testInject('Hello World');");
view.loadUrl("javascript:updateOverview(SOME DATA);");
}
#Override
public void onLoadResource (WebView view, String url) {
Log.v(TAG, "Webview load Resouce " + url);
}
});
wView.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d(TAG, message);
return true;
}
});
wView.loadUrl(URL);
Does anyone have an idea what is prohibiting the webview from loading my injected html images.
---- UPDATE ----
Some extra testing, when adding the img tag manually to the html the image is loaded and then when adding it again trough javascript it is shown. But only the same image is show all others are still not loaded.
After about 8 hours of testing , debugging and head bashing. I found the solution.
Inspired by the following article http://artemzin.com/blog/android-webview-io/
By overriding shouldInterceptRequest the WebView wil load the images.
wView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
view.loadUrl("javascript:testInject('Hello World');");
view.loadUrl("javascript:updateOverview("SOME DATA");
}
#Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
return super.shouldInterceptRequest(view, request);
}
});
It has been asked many times before, I browsed through everything, no clear answers yet.
Question simplified: Is it possible to inject local Javascript file (from asset or storage) to remote webpage loaded in an Android Web-View? I know that it is possible to inject such files to local Webpages (Assets HTML) loaded in a Web-View.
Why do I need this to work? : To make browsing experience faster, by avoiding downloading of bigger files such as Js and CSS files every time. I want to avoid Web-View Caching.
There is a way to 'force' the injection of your local Javascript files from local assets (e.g., assets/js/script.js), and to circumvent the 'Not allowed to load local resource : file:///android_assets/js/script.js ...' issue.
It is similar to what described in another thread (Android webview, loading javascript file in assets folder), with additional BASE64 encoding/decoding for representing your Javascript file as a printable string.
I am using an Android 4.4.2, API level 19 Virtual Device.
Here are some code snippets:
[assets/js/script.js]:
'use strict';
function test() {
// ... do something
}
// more Javascript
[MainActivity.java]:
...
WebView myWebView = (WebView) findViewById(R.id.webView);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAllowUniversalAccessFromFileURLs(true);
myWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
injectScriptFile(view, "js/script.js"); // see below ...
// test if the script was loaded
view.loadUrl("javascript:setTimeout(test(), 500)");
}
private void injectScriptFile(WebView view, String scriptFile) {
InputStream input;
try {
input = getAssets().open(scriptFile);
byte[] buffer = new byte[input.available()];
input.read(buffer);
input.close();
// String-ify the script byte-array using BASE64 encoding !!!
String encoded = Base64.encodeToString(buffer, Base64.NO_WRAP);
view.loadUrl("javascript:(function() {" +
"var parent = document.getElementsByTagName('head').item(0);" +
"var script = document.createElement('script');" +
"script.type = 'text/javascript';" +
// Tell the browser to BASE64-decode the string into your script !!!
"script.innerHTML = window.atob('" + encoded + "');" +
"parent.appendChild(script)" +
"})()");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
myWebView.loadUrl("http://www.example.com");
...
loadUrl will work only in old version use evaluateJavascript
webview.evaluateJavascript("(function() { document.getElementsByName('username')[0].value='USERNAME';document.getElementsByName('password')[0].value='PASSWORD'; "+
"return { var1: \"variable1\", var2: \"variable2\" }; })();", new ValueCallback<String>() {
#Override
public void onReceiveValue(String s) {
Log.d("LogName", s); // Prints: {"var1":"variable1","var2":"variable2"}
}
});
Yes, you could use shouldInterceptRequest() to intercept remote url loading and return local stored content.
WebView webview = (WebView) findViewById(R.id.webview);
webview.setWebViewClient(new WebViewClient() {
#Override
public WebResourceResponse shouldInterceptRequest (final WebView view, String url) {
if (url.equals("script_url_to_load_local")) {
return new WebResourceResponse("text/javascript", "UTF-8", new FileInputStream("local_url")));
} else {
return super.shouldInterceptRequest(view, url);
}
}
});
Be careful using evaluateJavascript: if there is a syntax error or exception thrown in your javascript it will call your onReceiveValue with a null. The most common way to support both SDK 19 as well as lower seems to be like this:Fill form in WebView with Javascript
Also if you get terribly desperate for some kind of browser functionality (in my case, never could figure out how to get DRM to work well) you could use a bookmarklet within normal chrome, which works only if you type the bookmark name into the omnibox but does work and does inject javascript.
Also be aware that with the default WebView you can't use javascript alerts to test anything, they don't show. Also be aware that "video" by default (like html <video> tags) doesn't "really work" by default and also DRM video doesn't work by default, they're all configure options :\
I am trying to load offline version of python documentation into an webview from assetfolder. The offline docs work perfectly in my pc web browser in offline but not working properly in webview (something like jquery is missing).
#SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = (WebView) findViewById(R.id.wrapper);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient());
webView.loadUrl("file:///android_asset/python/index.html");
}
}
And this error message is shown when I tried to load the home page or navigate to any page.
09-24 01:03:02.789: E/Web Console(479): ReferenceError: Can't find variable: $ at file:///android_asset/python/index.html:164
And the above error is for a Jquery code snippet ( I think this for that the jquery library isn't loading)
<script type="text/javascript">$('#searchbox').show(0);</script>
But when I load those pages from my local server localhost or http server, this is working perfectly. What did I miss?
Edit
Showing nothing in the webView. After using loadDataWithBaseURL:
#SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = (WebView) findViewById(R.id.wrapper);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient());
AssetManager assetManager = getAssets();
String htmlPage = null;
InputStream input;
try {
input = assetManager.open("python/index.html");
int size = input.available();
byte[] buffer = new byte[size];
input.read(buffer);
input.close();
// byte buffer into a string
htmlPage = new String(buffer);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
webView.loadDataWithBaseURL("file:///android_asset/", htmlPage, "text/html", "utf-8", "");
}
}
Your html page should be having reference to
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.min.js">
</script>
Since you say the docs should load offline the jquery js is not being loaded. You could probably bundle jquery along with your application and reference it locally like this
<script src="file:///android_asset/js/jquery-1.8.2.min.js"></script>
Also include
<script src="file:///android_asset/js/jquery.mobile-1.3.2.min.js"></script>
You might also have to load your html page using loadDataWithBaseURL as seen below instead of loadUrl.
AssetManager assetManager = getAssets();
String htmlPage=null;
InputStream input;
try {
input = assetManager.open("python/index.html");
int size = input.available();
byte[] buffer = new byte[size];
input.read(buffer);
input.close();
// byte buffer into a string
htmlPage = new String(buffer);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
webView.loadDataWithBaseURL("file:///android_asset/", htmlPage, "text/html", "utf-8", "");
Note: jquery-1.8.2.min.js and jquery.mobile-1.3.2.min.js files should be present in your assets folder.
Hope this helps.
The problem was - I extracted those web files from a phonegap app's asset folder; those had some additional files ad different structure. That's why it was not working in Android naive environment !