Java tutorial
/* This file is part of the dandelion*. dandelion* is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. dandelion* is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the dandelion*. If not, see <http://www.gnu.org/licenses/>. */ package com.github.dfa.diaspora_android.web; import android.content.Context; import android.content.MutableContextWrapper; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.webkit.WebSettings; import android.webkit.WebView; import android.widget.ProgressBar; import com.github.dfa.diaspora_android.App; import com.github.dfa.diaspora_android.R; import com.github.dfa.diaspora_android.ui.theme.ThemeHelper; import com.github.dfa.diaspora_android.ui.theme.ThemedFragment; import com.github.dfa.diaspora_android.util.AppLog; import com.github.dfa.diaspora_android.util.AppSettings; import android.support.v4.widget.SwipeRefreshLayout;//pull to refresh /** * Fragment with a webView and a ProgressBar. * This Fragment retains its instance. * Created by vanitas on 26.09.16. */ public class BrowserFragment extends ThemedFragment { public static final String TAG = "com.github.dfa.diaspora_android.BrowserFragment"; protected ContextMenuWebView webView; protected ProgressBar progressBar; protected AppSettings appSettings; protected CustomWebViewClient webViewClient; protected WebSettings webSettings; protected String pendingUrl; protected SwipeRefreshLayout swipe;//pull to refresh @Override protected int getLayoutResId() { return R.layout.browser__fragment; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { AppLog.d(this, "onViewCreated()"); super.onViewCreated(view, savedInstanceState); if (this.appSettings == null) { this.appSettings = ((App) getActivity().getApplication()).getSettings(); } if (this.webView == null) { this.webView = view.findViewById(R.id.webView); getActivity().runOnUiThread(new Runnable() { @Override public void run() { BrowserFragment.this.applyWebViewSettings(); } }); ProxyHandler.getInstance().addWebView(webView); } if (this.progressBar == null) { this.progressBar = view.findViewById(R.id.progressBar); } if (pendingUrl != null) { loadUrl(pendingUrl); pendingUrl = null; } webView.setParentActivity(getActivity()); this.setRetainInstance(true); //pull to refresh swipe = view.findViewById(R.id.swipe); swipe.setOnRefreshListener(() -> reloadUrl()); swipe.setDistanceToTriggerSync(2000); } @Override public void onDestroyView() { super.onDestroyView(); if (getRetainInstance() && getView() != null && getView().getParent() instanceof ViewGroup) { ((ViewGroup) getView().getParent()).removeView(getView()); } } private void applyWebViewSettings() { this.webSettings = webView.getSettings(); webSettings.setAllowFileAccess(false); webSettings.setUseWideViewPort(true); webSettings.setLoadWithOverviewMode(true); webSettings.setUserAgentString( "Mozilla/5.0 (Linux; U; Android 4.4.4; Nexus 5 Build/KTU84P) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30"); webSettings.setDomStorageEnabled(true); webSettings.setMinimumFontSize(appSettings.getMinimumFontSize()); webSettings.setLoadsImagesAutomatically(appSettings.isLoadImages()); webSettings.setAppCacheEnabled(true); if (android.os.Build.VERSION.SDK_INT >= 21) { WebView.enableSlowWholeDocumentDraw(); webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW); } this.registerForContextMenu(webView); //webView.setParentActivity(this); webView.setOverScrollMode(WebView.OVER_SCROLL_ALWAYS); this.webViewClient = new CustomWebViewClient((App) getActivity().getApplication(), webView); webView.setWebViewClient(webViewClient); webView.setWebChromeClient(new ProgressBarWebChromeClient(webView, progressBar)); } @Override public void onResume() { super.onResume(); if (webView != null) { webSettings.setMinimumFontSize(appSettings.getMinimumFontSize()); webSettings.setLoadsImagesAutomatically(appSettings.isLoadImages()); } } @Override public String getFragmentTag() { return TAG; } @Override public void onAttach(Context context) { super.onAttach(context); if (webView != null && webView.getContext() instanceof MutableContextWrapper) { ((MutableContextWrapper) webView.getContext()).setBaseContext(context); } } public boolean onBackPressed() { if (webView.canGoBack()) { getActivity().runOnUiThread(new Runnable() { @Override public void run() { webView.goBack(); } }); return true; } return false; } public void loadUrl(final String url) { if (getWebView() != null) { AppLog.v(this, "loadUrl(): load " + url); getActivity().runOnUiThread(new Runnable() { @Override public void run() { getWebView().loadUrlNew(url); } }); } else { AppLog.v(this, "loadUrl(): WebView null: Set pending url to " + url); pendingUrl = url; } } public String getUrl() { if (getWebView() != null) { return getWebView().getUrl(); } else { return pendingUrl; } } public void reloadUrl() { AppLog.v(this, "reloadUrl()"); if (getWebView() != null) { getActivity().runOnUiThread(new Runnable() { @Override public void run() { getWebView().reload(); swipe.setRefreshing(false);//pull to refresh } }); } } public ContextMenuWebView getWebView() { return this.webView; } @Override protected void applyColorToViews() { ThemeHelper.updateProgressBarColor(progressBar); } }