Java tutorial
/** * Copyright 2013 The Finest Artist * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and *limitations under the License. */ package com.utopia.thefinestartist; import android.annotation.SuppressLint; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.media.AudioManager; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.webkit.WebChromeClient; import android.webkit.WebSettings.PluginState; import android.webkit.WebSettings.ZoomDensity; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Button; import android.widget.FrameLayout; import android.widget.ImageButton; import android.widget.ProgressBar; import android.widget.RelativeLayout; public class SimpleWebViewFragment extends Fragment implements OnClickListener { public static final String EXTRA_URL = "url"; private String mUrl = null; private FrameLayout mView = null; private WebView mWebview = null; private ProgressBar mLbar = null; private ProgressBar mPbar = null; private FrameLayout mReload = null; private Button mReloadBtn = null; private int errorCount = 0; private boolean errored = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mUrl = getArguments().getString(EXTRA_URL); if (!mUrl.startsWith("http")) mUrl = "http://" + mUrl; } @SuppressLint({ "SetJavaScriptEnabled", "NewApi" }) @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.web_view, container, false); mReload = (FrameLayout) view.findViewById(R.id.web_view_reload); mLbar = (ProgressBar) view.findViewById(R.id.web_view_loading); mPbar = (ProgressBar) view.findViewById(R.id.web_view_progress); mView = (FrameLayout) view.findViewById(R.id.web_view); mView.setLayoutParams( new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); mWebview = new WebView(getActivity()); mWebview.setVisibility(View.GONE); mWebview.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); if (mUrl != null) { mWebview.setWebViewClient(new MyWebViewClient()); mWebview.setWebChromeClient(new MyWebChromeClient()); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) mWebview.getSettings().setPluginState(PluginState.ON); mWebview.getSettings().setUseWideViewPort(false); mWebview.getSettings().setDefaultZoom(ZoomDensity.FAR); mWebview.getSettings().setBuiltInZoomControls(true); mWebview.getSettings().setSupportZoom(true); mWebview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); mWebview.getSettings().setAllowFileAccess(true); mWebview.getSettings().setDomStorageEnabled(true); mWebview.getSettings().setJavaScriptEnabled(true); mWebview.addJavascriptInterface(new JavaScriptInterface(getActivity()), "Android"); mWebview.getSettings().setAppCacheEnabled(true); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) mWebview.getSettings().setDisplayZoomControls(false); mWebview.loadUrl(mUrl); } mView.addView(mWebview); mReloadBtn = (Button) view.findViewById(R.id.reload_btn); mReloadBtn.setOnClickListener(this); return view; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.reload_btn: errored = false; mWebview.reload(); break; } } @Override public void onDetach() { super.onDetach(); mView.removeView(mWebview); mWebview.removeAllViews(); mWebview.destroy(); } public boolean hasBack() { if (mWebview == null) return false; return mWebview.canGoBack(); } public void back() { if (mWebview != null) mWebview.goBack(); } public class MyWebChromeClient extends WebChromeClient { @Override public void onProgressChanged(WebView view, int progress) { if (progress < 100 && mPbar.getVisibility() == ProgressBar.GONE) mPbar.setVisibility(ProgressBar.VISIBLE); mPbar.setProgress(progress); if (progress == 100) { mPbar.setVisibility(ProgressBar.GONE); if (!errored) { mReload.setVisibility(View.INVISIBLE); errorCount = 0; } } } } public class MyWebViewClient extends WebViewClient { @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { mReloadBtn.setClickable(false); mReloadBtn.setTextColor(getResources().getColor(R.color.white_overlay)); } @Override public void onPageFinished(WebView view, String url) { view.setVisibility(View.VISIBLE); final Animation fade = new AlphaAnimation(0.0f, 1.0f); fade.setDuration(200); view.startAnimation(fade); view.setVisibility(View.VISIBLE); mReloadBtn.setClickable(true); mReloadBtn.setTextColor(getResources().getColor(android.R.color.white)); mLbar.setVisibility(View.INVISIBLE); } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { if (url.endsWith(".mp4")) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.parse(url), "video/*"); view.getContext().startActivity(intent); return true; } else { return super.shouldOverrideUrlLoading(view, url); } } @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { errored = true; if (errorCount < 2) view.reload(); else { mReload.setVisibility(View.VISIBLE); view.setVisibility(View.INVISIBLE); } errorCount++; super.onReceivedError(view, errorCode, description, failingUrl); } } public class JavaScriptInterface { Context mContext; JavaScriptInterface(Context c) { mContext = c; } //add other interface methods to be called from JavaScript public void playSoundEffect() { AudioManager am = (AudioManager) getActivity().getSystemService(Activity.AUDIO_SERVICE); am.playSoundEffect(AudioManager.FX_KEY_CLICK); } } }