Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2015 Gian Ulli (gian.ulli@gmail.com) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package ch.gianulli.trelloapi.ui; import android.app.Dialog; import android.graphics.Bitmap; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.DialogFragment; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.webkit.JavascriptInterface; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.ProgressBar; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.regex.Matcher; import java.util.regex.Pattern; import ch.gianulli.trelloapi.R; import ch.gianulli.trelloapi.TrelloAPI; /** * DialogFragment that handles the user authentication process with Trello. */ public class AuthenticationDialogFragment extends DialogFragment { private static final String URL_AUTHORIZATION = "https://trello.com/1/authorize?"; private static final String URL_TOKEN = "https://trello.com/1/token/approve"; private TrelloAPI mApi; private WebView mWebView; private ProgressBar mProgressIndicator; public AuthenticationDialogFragment() { } /** * @return New instance of fragment */ public static AuthenticationDialogFragment newInstance() { AuthenticationDialogFragment result = new AuthenticationDialogFragment(); return result; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mApi = new TrelloAPI(getActivity()); setCancelable(false); } @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (getDialog() != null) { getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE); } View v = inflater.inflate(R.layout.dialog_authentication, container, false); mProgressIndicator = (ProgressBar) v.findViewById(R.id.progress_indicator); mWebView = (WebView) v.findViewById(R.id.webview); // Catch token mWebView.setWebViewClient(new WebViewClient() { @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { setProgressIndicatorVisibility(true); } @Override public void onPageFinished(WebView view, String url) { setProgressIndicatorVisibility(false); if (url.equals(URL_TOKEN)) { // Get token and close dialog mWebView.loadUrl("javascript:window.HTMLOUT.parseHTML('<html>'+document" + ".getElementsByTagName('html')[0].innerHTML+'</html>');"); } else { super.onPageFinished(view, url); } } }); WebSettings webSettings = mWebView.getSettings(); webSettings.setJavaScriptEnabled(true); mWebView.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT"); mWebView.setVisibility(View.GONE); mWebView.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_UP) { switch (keyCode) { case KeyEvent.KEYCODE_BACK: if (mWebView.canGoBack()) { mWebView.goBack(); return true; } } } return false; } }); // Load first page setProgressIndicatorVisibility(true); try { mWebView.loadUrl(URL_AUTHORIZATION + "key=" + mApi.getAppKey() + "&name=" + URLEncoder.encode(getString(R.string.app_name), "UTF-8") + "&expiration=never&response_type=token&scope=read,write"); } catch (UnsupportedEncodingException e) { // never happens } return v; } @Override public void onStart() { super.onStart(); Dialog dialog = getDialog(); if (dialog != null) { dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); } } private void setProgressIndicatorVisibility(boolean visible) { if (visible) { mProgressIndicator.setVisibility(View.VISIBLE); mWebView.setVisibility(View.GONE); } else { mProgressIndicator.setVisibility(View.GONE); mWebView.setVisibility(View.VISIBLE); } } /* Dirty hack to get HTML content of WebView */ private class MyJavaScriptInterface { @JavascriptInterface public void parseHTML(final String html) { Log.d("test", html); Pattern p = Pattern.compile("([0-9a-f]{64})"); Matcher m = p.matcher(html); if (m.find()) { String token = m.group(0); Log.d("test", "Found token: " + token + ", length: " + token.length()); mApi.setToken(token); dismiss(); } else { // TODO: show some error message } } } }