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/*
 * Copyright 2018 jw362j.
 *
 * 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.hadoopz.MyDroidLib.webview;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.net.Uri;
import android.net.http.SslError;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.RelativeSizeSpan;
import android.view.*;
import android.webkit.*;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.hadoopz.MyDroidLib.util.DefaultLogUtil;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.Set;
import android.view.ViewGroup.LayoutParams;
import android.webkit.WebChromeClient.CustomViewCallback;

/**
 *
 * @author jw362j
 */
public class WebViewProcesser extends Activity {

    private TextView app_webViewTitle;
    private TextView goBackTitle;
    private WebView commWebView;
    private ProgressDialog progress;
    private static WebViewProcessListener processListener;
    private String loadingUrl;
    private String httpRequestData;
    private static final String CHARSET = "UTF-8";
//    private int titleLenght_Max = 40;
    private boolean ssl_warning_flag;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
//        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
        initAndAddView();
    }

    private void initAndAddView() {
        LinearLayout layout_root = new LinearLayout(WebViewProcesser.this);
        LinearLayout.LayoutParams layout_rootParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, android.view.ViewGroup.LayoutParams.MATCH_PARENT);
        layout_root.setOrientation(LinearLayout.VERTICAL);

        //add title=====================================
        RelativeLayout rl_title = new RelativeLayout(WebViewProcesser.this);
        app_webViewTitle = new TextView(WebViewProcesser.this);
        goBackTitle = new TextView(WebViewProcesser.this);

        String theTitle = processListener.getBrowserTitle();
        String browserTitle = theTitle == null ? "Back" : theTitle;
        SpannableString msp_tv_back_text = new SpannableString(browserTitle);
        msp_tv_back_text.setSpan(new RelativeSizeSpan(0.88f), 0, msp_tv_back_text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        goBackTitle.setText(msp_tv_back_text);
        goBackTitle.setTextColor(Color.parseColor("#ffffff"));
        app_webViewTitle.setTextColor(Color.parseColor("#ffffffff"));
        rl_title.setBackgroundColor(Color.parseColor("#0577b2"));
        app_webViewTitle.setPadding(0, 3, 0, 3);
        app_webViewTitle.setText("");

        RelativeLayout.LayoutParams rl_titleTextViewParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        rl_titleTextViewParams.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
        rl_titleTextViewParams.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);

        RelativeLayout.LayoutParams r2_titleTextViewParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        r2_titleTextViewParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
        r2_titleTextViewParams.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);
        r2_titleTextViewParams.rightMargin = 10;

        rl_title.addView(app_webViewTitle, rl_titleTextViewParams);
        rl_title.addView(goBackTitle, r2_titleTextViewParams);

        goBackTitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
        //add title=====================================

        //add webview=======================================
        LinearLayout.LayoutParams commWebViewParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        commWebView = new WebView(WebViewProcesser.this);

        //add webview=======================================
        LinearLayout.LayoutParams rl_titleLayoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        layout_root.addView(rl_title, rl_titleLayoutParams);
        layout_root.addView(commWebView, commWebViewParams);

        setContentView(layout_root, layout_rootParams);

//        ProgressDialog
        progress = new ProgressDialog(WebViewProcesser.this);
        progress.requestWindowFeature(Window.FEATURE_NO_TITLE);
        progress.setMessage("Loading...");
        progress.setCancelable(false);
        progress.setCanceledOnTouchOutside(false);

        if (processListener == null) {
            Toast.makeText(WebViewProcesser.this, "url or postdata is null....", Toast.LENGTH_LONG).show();
            finish();
            return;
        }

        loadingUrl = processListener.getUrl();
        StringBuilder sb_params = null;
        Map ps = processListener.getParameters();
        if (ps != null && !ps.isEmpty()) {
            sb_params = new StringBuilder();
            Set keys = ps.keySet();
            for (String key : keys) {
                try {
                    sb_params.append(URLEncoder.encode(key, CHARSET)).append("=").append(URLEncoder.encode(ps.get(key), CHARSET)).append("&");
                } catch (UnsupportedEncodingException ex) {
                    DefaultLogUtil.getInstance().d("WebViewProcesser", "the post data in  UnsupportedEncodingException:" + ex.getMessage());
                }
            }
            sb_params.deleteCharAt(sb_params.length() - 1);
            DefaultLogUtil.getInstance().d("WebViewProcesser", "the post data in  StringRequest is:" + sb_params.toString());
        }
        if (sb_params != null) {
            httpRequestData = sb_params.toString().trim();
        }
        DefaultLogUtil.getInstance().d("WebViewProcesser", "detail for the request url:" + loadingUrl);

        if ("".equals(loadingUrl) || loadingUrl == null) {
            Toast.makeText(WebViewProcesser.this, "url  is null....", Toast.LENGTH_LONG).show();
            finish();
            return;
        }

        //start to init the webview and load it
        showDialog();
        setUpWebView();
    }

    private void setUpWebView() {
        WebSettings webSettings = commWebView.getSettings();

        webSettings.setLoadsImagesAutomatically(true);
        webSettings.setSaveFormData(false);
        webSettings.setLightTouchEnabled(true);
        webSettings.setSavePassword(false);
        webSettings.setSupportZoom(false);
        webSettings.setCacheMode(WebSettings.LOAD_NORMAL);
        // webSettings.setMinimumFontSize(mMinimumFontSize);
//        webSettings.setMinimumLogicalFontSize(mMinimumLogicalFontSize);
//        webSettings.setDefaultFontSize(mDefaultFontSize);
//        webSettings.setDefaultFixedFontSize(mDefaultFixedFontSize);
        webSettings.setTextSize(WebSettings.TextSize.NORMAL);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        webSettings.setAllowFileAccess(true);
        webSettings.setBuiltInZoomControls(true);

        webSettings.setJavaScriptEnabled(true);
        webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
        webSettings.setDefaultTextEncodingName(CHARSET);
        webSettings.setDomStorageEnabled(true);//important line of code for html5 js script

        commWebView.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View view, int i, KeyEvent keyEvent) {
                if (keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
                    if (i == KeyEvent.KEYCODE_BACK && commWebView.canGoBack()) {
                        DefaultLogUtil.getInstance().d("WebViewProcesser", "webview goback");
                        if (commWebView.canGoBack()) {
                            commWebView.goBack();
                        } else {
                            WebViewProcesser.this.finish();
                        }
                        return true;
                    }
                }
                return false;
            }
        });

        commWebView.setWebViewClient(new WebViewClient() {
            /**
             * in order to handle https request
             *
             * @param view
             * @param handler
             * @param error
             * http://stackoverflow.com/questions/36050741/webview-avoid-security-alert-from-google-play-upon-implementation-of-onreceiveds
             */
            @Override
            public void onReceivedSslError(WebView view, final SslErrorHandler handler, SslError error) {
                if (!ssl_warning_flag) {
                    final AlertDialog.Builder builder = new AlertDialog.Builder(WebViewProcesser.this);
                    builder.setMessage("Invalid SSLCert From Server!");
                    builder.setPositiveButton("Continue", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            handler.proceed();
                            ssl_warning_flag = true;
                        }
                    });
                    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            finish();
                            handler.cancel();
                        }
                    });
                    final AlertDialog dialog = builder.create();
                    dialog.show();
                } else {
                    handler.proceed();
                }
                DefaultLogUtil.getInstance().d("WebViewProcesser", "-test onReceivedSslError:" + error);
            }

            @Override
            public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
                return super.shouldInterceptRequest(view, url);
            }

            /**
             * will be invoked once user click the link which in the page ,true
             * :loading the page in this webview,false :go to system browser to
             * load the page
             *
             * @param view
             * @param url
             * @return
             */
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                if (url.startsWith("tel:")) {
                    Uri uri = Uri.parse(url);
                    Intent it = new Intent(Intent.ACTION_DIAL, uri);
                    startActivity(it);
                } // else if(url.endsWith(".apk"))
                else if (url.contains(".apk")) {
                    Uri uri = Uri.parse(url);
                    Intent it = new Intent(Intent.ACTION_VIEW, uri);
                    startActivity(it);
                }
                DefaultLogUtil.getInstance().d("WebViewProcesser", "shouldOverrideUrlLoading url:" + url);
                if (!url.contains("about:blank") && url.contains("http")) {
                    view.loadUrl(url);
                    return true;
                } else {
                    return false;
                }

            }

            @Override
            public void onLoadResource(WebView view, String url) {
                super.onLoadResource(view, url);
                DefaultLogUtil.getInstance().d("WebViewProcesser", "-test onLoadResource url is:" + url);
            }

            /**
             * will be invoked when the page is starting to load
             *
             * @param view
             * @param url
             * @param favicon
             */
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                DefaultLogUtil.getInstance().d("WebViewProcesser", "-test onPageStarted url is:" + url);
                DefaultLogUtil.getInstance().d("WebViewProcesser", "url length:" + url.length());

                if ("about:blank".equals(url)) {
                    Toast.makeText(WebViewProcesser.this, "unrecognized url destination:" + url, Toast.LENGTH_LONG).show();
                    WebViewProcesser.this.finish();
//                    if(commWebView.canGoBack())commWebView.goBack();
                    return;
                }
                super.onPageStarted(view, url, favicon);
                showDialog();
                String return_url = processListener.getReturnUrl();
                if (return_url != null) {
                    if (url.startsWith(return_url)) {
                        view.stopLoading();
                        if (processListener != null) {
                            finish();
                            processListener.onWebViewProcess(WebViewProcesser.this, url);
                        }
                    }
                }

            }

            @Override
            public void onPageFinished(WebView view, String url) {
                DefaultLogUtil.getInstance().d("WebViewProcesser", "-test onPageFinished:");
                super.onPageFinished(view, url);
                hideDialog();
            }

            @Override
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                DefaultLogUtil.getInstance().d("WebViewProcesser", "webview error,errorCode:" + errorCode + ",description:" + description + ",failingUrl:" + failingUrl);
                view.stopLoading();
                hideDialog();
                super.onReceivedError(view, errorCode, description, failingUrl);
            }
        });

        commWebView.setWebChromeClient(new WebChromeClient() {

            @Override
            public boolean onConsoleMessage(ConsoleMessage cm) {
                String consoleMsg = "javascript console message by tguard sdk:" + cm.message() + " -- From line "
                        + cm.lineNumber() + " of "
                        + cm.sourceId();
                DefaultLogUtil.getInstance().d("WebViewProcesser", consoleMsg);
                return true;
            }

            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                super.onProgressChanged(view, newProgress);
                DefaultLogUtil.getInstance().d("WebViewProcesser", "in MyChromeClient and newProgress is:" + newProgress);
            }

            @Override
            public void onReceivedIcon(WebView view, Bitmap icon) {
                super.onReceivedIcon(view, icon);
            }

            @Override
            public void onReceivedTitle(WebView view, String title) {
                super.onReceivedTitle(view, title);

                if (!"".equals(title) && title != null) {
//                    app_webViewTitle.setText(title.length() > titleLenght_Max ? title.substring(0, titleLenght_Max - 5) + "..." : title);
                }
            }

            @Override
            public View getVideoLoadingProgressView() {
                FrameLayout frameLayout = new FrameLayout(WebViewProcesser.this);
                frameLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
                return frameLayout;
            }

            @Override
            public void onShowCustomView(View view, CustomViewCallback callback) {
                showCustomView(view, callback);
            }

            @Override
            public void onHideCustomView() {
                hideCustomView();
            }

        });

        if (processListener != null) {
            processListener.setUpWebview(commWebView);
            HttpRequestMethodType method = processListener.getRequestMethod();
            if (method == HttpRequestMethodType.HTTP_GET) {
                String target_url = httpRequestData == null ? loadingUrl : loadingUrl + "?" + httpRequestData;
                DefaultLogUtil.getInstance().d("WebViewProcesser", "the request was send by get:" + target_url);
                Map headers = processListener.getHttpHeaders();
                DefaultLogUtil.getInstance().d("WebViewProcesser", "the header in webview:" + headers);
                if (headers == null) {
                    commWebView.loadUrl(target_url);
                } else {
                    DefaultLogUtil.getInstance().d("WebViewProcesser", "apply the header in webview request!");
                    commWebView.loadUrl(target_url, headers);
                }
            } else if (method == HttpRequestMethodType.HTTP_POST) {
                DefaultLogUtil.getInstance().d("WebViewProcesser", "the request was send by post , post data is:" + httpRequestData + ",url is:" + loadingUrl);
                try {
                    commWebView.postUrl(loadingUrl, httpRequestData.getBytes(CHARSET));
                } catch (UnsupportedEncodingException ex) {
                    DefaultLogUtil.getInstance().d("WebViewProcesser", ex.getMessage());
                }
            }
        }

    }

    public static void startMe(Context context, WebViewProcessListener webViewProcessListener) {
        if (webViewProcessListener == null) {
            DefaultLogUtil.getInstance().e("WebViewProcesser", "webViewProcessListener is null ,could not start web-flow as well ,just stop.............");
            return;
        }
        processListener = webViewProcessListener;//when the process ready,then let the listener null
        if (context != null) {
            context.startActivity(new Intent(context, WebViewProcesser.class));
        } else {
            DefaultLogUtil.getInstance().d("WebViewProcesser", "context is null ,could not start web-flow as well ,just stop.............");
        }
    }

    private void showDialog() {
        if (progress != null) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (!progress.isShowing()) {
                        progress.show();
                    }
                }
            });
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (commWebView.canGoBack()) {
                commWebView.goBack();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    private void hideDialog() {
        if (progress != null) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    progress.dismiss();
                }
            });
        }
    }

    @Override
    public void onLowMemory() {
        commWebView.clearCache(true);
        super.onLowMemory();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (progress != null) {
            progress = null;
        }
        if (commWebView != null) {
            commWebView.clearCache(true);
            commWebView.clearFormData();
            commWebView.removeAllViews();
            commWebView = null;
        }
        loadingUrl = null;
        httpRequestData = null;
    }

    private FullscreenHolder fullscreenContainer;
    private View customView;
    private WebChromeClient.CustomViewCallback customViewCallback;
    protected static final FrameLayout.LayoutParams COVER_SCREEN_PARAMS = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

    /**
     * 视频播放全屏 *
     */
    private void showCustomView(View view, CustomViewCallback callback) {
        // if a view already exists then immediately terminate the new one
        if (customView != null) {
            callback.onCustomViewHidden();
            return;
        }

        WebViewProcesser.this.getWindow().getDecorView();

        FrameLayout decor = (FrameLayout) getWindow().getDecorView();
        fullscreenContainer = new FullscreenHolder(WebViewProcesser.this);
        fullscreenContainer.addView(view, COVER_SCREEN_PARAMS);
        decor.addView(fullscreenContainer, COVER_SCREEN_PARAMS);
        customView = view;
        setStatusBarVisibility(false);
        customViewCallback = callback;
    }

    /**
     * 隐藏视频全屏
     */
    private void hideCustomView() {
        if (customView == null) {
            return;
        }

        setStatusBarVisibility(true);
        FrameLayout decor = (FrameLayout) getWindow().getDecorView();
        decor.removeView(fullscreenContainer);
        fullscreenContainer = null;
        customView = null;
        customViewCallback.onCustomViewHidden();
        commWebView.setVisibility(View.VISIBLE);
    }

    /**
     * 全屏容器界面
     */
    static class FullscreenHolder extends FrameLayout {

        public FullscreenHolder(Context ctx) {
            super(ctx);
            setBackgroundColor(ctx.getResources().getColor(android.R.color.black));
        }

        @Override
        public boolean onTouchEvent(MotionEvent evt) {
            return true;
        }
    }

    private void setStatusBarVisibility(boolean visible) {
        int flag = visible ? 0 : WindowManager.LayoutParams.FLAG_FULLSCREEN;
        getWindow().setFlags(flag, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                /**
                 * 回退键 事件处理 优先级:视频播放全屏-网页回退-关闭页面
                 */
                if (customView != null) {
                    hideCustomView();
                } else if (commWebView.canGoBack()) {
                    commWebView.goBack();
                } else {
                    finish();
                }
                return true;
            default:
                return super.onKeyUp(keyCode, event);
        }
    }

}




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