Android - Example for handling redirect urls and open PDF without download, in webview.

Android - Example for handling redirect urls and open PDF without download in webview.txt

private void init()
{
	WebView webview = (WebView) findViewById(R.id.webview);
	WebSettings settings = webview.getSettings();
	settings.setJavaScriptEnabled(true);
	webview.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);

	PdfWebViewClient pdfWebViewClient = new PdfWebViewClient(this, webview);
	pdfWebViewClient.loadPdfUrl(
				"https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjgwIfp3KXSAhXrhFQKHQqEDHYQFggZMAA&url=http%3A%2F%2Fwww.orimi.com%2Fpdf-test.pdf&usg=AFQjCNERYYcSfMLS5ukBcT2Qy11YxEhXqw&cad=rja");
}

private class PdfWebViewClient extends WebViewClient
{
	private static final String TAG = "PdfWebViewClient";
	private static final String PDF_EXTENSION = ".pdf";
	private static final String PDF_VIEWER_URL = "http://docs.google.com/gview?embedded=true&url=";

	private Context mContext;
	private WebView mWebView;
	private ProgressDialog mProgressDialog;
	private boolean isLoadingPdfUrl;

	public PdfWebViewClient(Context context, WebView webView)
	{
		mContext = context;
		mWebView = webView;
		mWebView.setWebViewClient(this);
	}

	public void loadPdfUrl(String url)
	{
		mWebView.stopLoading();

		if (!TextUtils.isEmpty(url))
		{
			isLoadingPdfUrl = isPdfUrl(url);
			if (isLoadingPdfUrl)
			{
				mWebView.clearHistory();
			}

			showProgressDialog();
		}

		mWebView.loadUrl(url);
	}

	@SuppressWarnings("deprecation")
	@Override
	public boolean shouldOverrideUrlLoading(WebView webView, String url)
	{
		return shouldOverrideUrlLoading(url);
	}

	@SuppressWarnings("deprecation")
	@Override
	public void onReceivedError(WebView webView, int errorCode, String description, String failingUrl)
	{
		handleError(errorCode, description.toString(), failingUrl);
	}

	@TargetApi(Build.VERSION_CODES.N)
	@Override
	public boolean shouldOverrideUrlLoading(WebView webView, WebResourceRequest request)
	{
		final Uri uri = request.getUrl();
		return shouldOverrideUrlLoading(webView, uri.toString());
	}

	@TargetApi(Build.VERSION_CODES.N)
	@Override
	public void onReceivedError(final WebView webView, final WebResourceRequest request, final WebResourceError error)
	{
		final Uri uri = request.getUrl();
		handleError(error.getErrorCode(), error.getDescription().toString(), uri.toString());
	}

	@Override
	public void onPageFinished(final WebView view, final String url)
	{
		Log.i(TAG, "Finished loading. URL : " + url);
		dismissProgressDialog();
	}

	private boolean shouldOverrideUrlLoading(final String url)
	{
		Log.i(TAG, "shouldOverrideUrlLoading() URL : " + url);

		if (!isLoadingPdfUrl && isPdfUrl(url))
		{
			mWebView.stopLoading();

			final String pdfUrl = PDF_VIEWER_URL + url;

			new Handler().postDelayed(new Runnable()
			{
				@Override
				public void run()
				{
					loadPdfUrl(pdfUrl);
				}
			}, 300);

			return true;
		}

		return false; // Load url in the webView itself
	}

	private void handleError(final int errorCode, final String description, final String failingUrl)
	{
		Log.e(TAG, "Error : " + errorCode + ", " + description + " URL : " + failingUrl);
	}

	private void showProgressDialog()
	{
		dismissProgressDialog();
		mProgressDialog = ProgressDialog.show(mContext, "", "Loading...");
	}

	private void dismissProgressDialog()
	{
		if (mProgressDialog != null && mProgressDialog.isShowing())
		{
			mProgressDialog.dismiss();
			mProgressDialog = null;
		}
	}

	private boolean isPdfUrl(String url)
	{
		if (!TextUtils.isEmpty(url))
		{
			url = url.trim();
			int lastIndex = url.toLowerCase().lastIndexOf(PDF_EXTENSION);
			if (lastIndex != -1)
			{
				return url.substring(lastIndex).equalsIgnoreCase(PDF_EXTENSION);
			}
		}
		return false;
	}
}

Added example code for handling redirect urls and open PDF without download, in webview.

URL loading is finished but not opening anything can you help me, thx!

Its not working on android version 7.1.1