webview播放视频并且点击全屏横屏的方法

• 首先initWebView，好吧有点多，有些是项目里其他需求需要的，不要在意这些细节···

public static void initWebView(WebView webView) {
        WebSettings settings = webView.getSettings();
        settings.setUseWideViewPort(true); // 关键点
        settings.setAllowFileAccess(true); // 允许访问文件
        settings.setSupportZoom(true); // 支持缩放
        settings.setLoadWithOverviewMode(true);
        settings.setJavaScriptEnabled(true);
//        settings.setPluginState(PluginState.ON);
//        settings.setPluginsEnabled(true);//可以使用插件
//        settings.setRenderPriority(WebSettings.RenderPriority.HIGH);
        settings.setCacheMode(NetUtils.hasNetwork(D8Application.getContext())?WebSettings.LOAD_DEFAULT:WebSettings.LOAD_CACHE_ELSE_NETWORK);  //设置 缓存模式  
        // 开启 DOM storage API 功能  
        settings.setDomStorageEnabled(true);
        //开启 database storage API 功能  
        settings.setDatabaseEnabled(true);
//        String cacheDirPath = getActivity().getFilesDir().getAbsolutePath()+APP_CACAHE_DIRNAME;
      String cacheDirPath = D8Application.getInstance().getCacheDir().getAbsolutePath()+Constant.APP_DB_CACHE_DIRNAME;  
        Logger.i("cacheDirPath="+cacheDirPath);
        //设置数据库缓存路径  
        webView.getSettings().setDatabasePath(cacheDirPath);
        //设置  Application Caches 缓存目录  
        webView.getSettings().setAppCachePath(cacheDirPath);
        //开启 Application Caches 功能  
        settings.setAppCacheEnabled(true);
    }

• 设置webviewclient，在当前的webview加载新的url，不设置的话会打开一个浏览器的

web.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
}

• 设置webChromeClient

web.setWebChromeClient(new WebChromeClient() {
            /*** 视频播放相关的方法 **/

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

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

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

            @Override
            public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
                Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
                result.confirm();
                return true;
            }
//            @Override
//            public void onReceivedTitle(WebView view, String title) {
//                super.onReceivedTitle(view, title);
//                CharSequence pnotfound = "404";
//                if (title.contains(pnotfound)) {
//                    view.stopLoading();
//                    rlNoNet.setVisibility(View.VISIBLE);
//                }
//            }

        });

• 全屏其实就是获取decorView，重新绘制一个全屏的framelayout盖在原有界面上，下面是一些方法

  /**
       * 视频播放全屏
       **/
       
        private void showCustomView(View view, WebChromeClient.CustomViewCallback callback) {
            // if a view already exists then immediately terminate the new one
            if (customView != null) {
                callback.onCustomViewHidden();
                return;
            }
            setStatusBarVisibility(false);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            web.setVisibility(View.INVISIBLE);
            FrameLayout decor = (FrameLayout) getWindow().getDecorView();
            fullscreenContainer = new FullscreenHolder(mContext);
            fullscreenContainer.addView(view, COVER_SCREEN_PARAMS);
            decor.addView(fullscreenContainer, COVER_SCREEN_PARAMS);
            customView = view;
            customViewCallback = callback;
        }
     
        /**
         * 隐藏视频全屏
         */
        private void hideCustomView() {
            if (customView == null) {
                return;
            }
     
            setStatusBarVisibility(true);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            FrameLayout decor = (FrameLayout) getWindow().getDecorView();
            decor.removeView(fullscreenContainer);
            fullscreenContainer = null;
            customView = null;
            customViewCallback.onCustomViewHidden();
            web.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 void onBackPressed() {
            /** 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 (web.canGoBack()) {
                web.goBack();
            } else {
                super.onBackPressed();
            }
        }

• 最后不要忘了

@Override
    protected void onDestroy() {
        web.destroy();
        super.onDestroy();
    }

以及在清单中加上

<activity android:name=".activity.WebActivity"
           android:hardwareAccelerated="true"   
           android:configChanges="orientation|keyboardHidden|screenSize"/>

不开硬件加速，视频会黑屏，有声音没图像；

不设置configChanges，当转屏以及转屏造成的屏幕尺寸变化的时候，activity会冲走onCreate方法，前面干的所有事儿都白干了~