设计思想理解

1、获取网页的加载进度

• void  onProgressChanged(WebView view, int newProgress)  Tell the host application the current progress of loading a page.
• newProgress: Current page loading progress, represented by an integer between 0 and 100.
• 大家一定要注意，底层实现时，是利用handler来定时轮循当前进度的，每隔一定时间查询一次，所以每次拿到的进度数据是不一样的。
• 也就是说如果页面较简单，可能会直接返回100，而跳过中间的各个数据。也就是说，除了100，其它任何一个数值不是一定返回的。
• 所以大家如果要用到进度，除了数值100可以用等号来判断，其它一定要用大于号或小于号，如果用了等号，可能永远也不会执行到。
• void  onReachedMaxAppCacheSize(long requiredStorage, long quota, WebStorage.QuotaUpdater quotaUpdater)  This method was deprecated in API level 19. This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API. 

2、获取网页中的基本信息

• void  onReceivedIcon(WebView view, Bitmap icon)  Notify the host application of a new favicon图标 for the current page.
• icon: A Bitmap containing the favicon for the current page.
• void  onReceivedTitle(WebView view, String title)  Notify the host application of a change in the document title 文档标题中的更改.
• title: A String containing the new title of the document.
• 获取标题的时间主要取决于网页前段设置标题的位置，一般设置在页面加载前面，可以较早调用到这个函数
• void  onReceivedTouchIconUrl(WebView view, String url, boolean precomposed)  Notify the host application of the url for an apple-touch-icon(苹果图标).
• 苹果为iOS设备配备了apple-touch-icon私有属性，添加该属性，在iPhone,iPad,iTouch的safari浏览器上可以使用添加到主屏按钮将网站添加到主屏幕上，方便用户以后访问。apple-touch-icon 标签支持sizes属性，可以用来放置对应不同的设备。
• url: The icon url.
• precomposed: True if the url is for a precomposed touch icon.

3、拦截网页中JS控制台消息

@Override

public boolean onConsoleMessage(ConsoleMessage consoleMessage) {

    Log.i("bqt", "【onConsoleMessage】" + "\nmessage=" + consoleMessage.message()

            + "\nlineNumber=" + consoleMessage.lineNumber()

            + "\nmessageLevel=" + consoleMessage.messageLevel() + "\nsourceId=" + consoleMessage.sourceId());

    return super.onConsoleMessage(consoleMessage);

}

I/chromium: [INFO:CONSOLE(18)] "log日志", source: file:///android_asset/h5/JS%E5%BC%B9%E6%A1%86%E6%BC%94%E7%A4%BA.html (18)

I/chromium: [INFO:CONSOLE(19)] "warn日志", source: file:///android_asset/h5/JS%E5%BC%B9%E6%A1%86%E6%BC%94%E7%A4%BA.html (19)

I/chromium: [INFO:CONSOLE(20)] "error日志", source: file:///android_asset/h5/JS%E5%BC%B9%E6%A1%86%E6%BC%94%E7%A4%BA.html (20)

@Override

public boolean onConsoleMessage(ConsoleMessage consoleMessage) {

    Log.i("bqt", "【onConsoleMessage】" + "\nmessage=" + consoleMessage.message()

            + "\nlineNumber=" + consoleMessage.lineNumber()

            + "\nmessageLevel=" + consoleMessage.messageLevel() + "\nsourceId=" + consoleMessage.sourceId());

    return super.onConsoleMessage(consoleMessage);

}

4、拦截网页中JS弹框

• boolean onJsAlert(WebView view, String url, String message, JsResult result) Tell the client to display a javascript alert dialog. 告诉客户端显示一个javascript警报对话框。
• If the client returns true, WebView will assume假定 that the client will handle the dialog. If the client returns false, it will continue execution 继续执行.
• The default behavior is to return false.（下面几个方法都是如此）
• 参数 url: The url of the page requesting the dialog.（下面几个方法都是如此）
• 参数 message: Message to be displayed in the window.（下面几个方法都是如此）
• 参数 result: A JsResult to confirm that the user hit enter. 一个用以确认用户点击进入的JsResult对象。
• Returns：boolean Whether the client will handle the alert dialog. 如果return true，不弹出对话框了；否则，会继续弹出对话框（下面几个方法都是如此）

• boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) Tell the client to display a prompt dialog to the user.
• If the client returns true, WebView will assume假定 that the client will handle the prompt dialog and call the appropriate相应的 JsPromptResult method. If the client returns false, a default value of false will be returned to to javascript.
• 参数 defaultValue: The default value displayed in the prompt dialog.
• 参数 result: A JsPromptResult used to send the user's reponse to javascript.

• boolean onJsTimeout() This method was deprecated in API level 17. This method is no longer supported and will not be invoked.

5、打开和关闭Window(多窗口)

<a href="https://www.taobao.com/" title="淘宝" target="_blank">新窗口打开链接</a>

webSettings.setSupportMultipleWindows(true);//支持多窗口。如果设置为true，主程序要实现onCreateWindow

@Override

public boolean onCreateWindow(WebView webView, boolean isDialog, boolean isUserGesture, Message resultMsg) {

    Log.i("bqt", "【onCreateWindow】 " + isDialog + "  " + isUserGesture + "\n详细信息" + resultMsg.toString());

    if (activity != null) {

        WebView childView = new WebView(activity);//Parent WebView cannot host it's own popup window.

        childView.setBackgroundColor(Color.GREEN);

        childView.setWebViewClient(new WebViewClient() {

            @Override

            public boolean shouldOverrideUrlLoading(WebView view, String url) {

                Log.i("bqt", "【shouldOverrideUrlLoading-子】");

                activity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));

                return true;

            }

        });

        WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;

        transport.setWebView(childView);//setWebView和getWebView两个方法

        resultMsg.sendToTarget();

        return true;

    } else return super.onCreateWindow(webView, isDialog, isUserGesture, resultMsg);//默认是returns false

}

6、视频(全屏)播放

• void  onShowCustomView(View view, WebChromeClient.CustomViewCallback callback)  Notify the host application that the current page has entered full screen mode 全屏模式.
• The host application must show the custom View which contains the web contents — video or other HTML content — in full screen mode. Also see "Full screen support" documentation on WebView.
• 网页中有H5播放flash video的时候按下全屏按钮将会调用到这个方法，一般用作设置网页播放全屏操作。
• view: the View object to be shown.
• callback: invoke this callback to request the page to exit full screen mode.
• void onShowCustomView(View view, int requestedOrientation, WebChromeClient.CustomViewCallback callback) This method was deprecated in API level 18. This method supports the obsolete plugin mechanism, and will not be invoked in future.
• void onHideCustomView() Notify the host application that the current page has exited full screen mode.
• The host application must hide the custom View, ie.即 the View passed to传递给 onShowCustomView(view, callback) when the content entered fullscreen. Also see "Full screen support" documentation on WebView.

7、文件选择器

• boolean  onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)  Tell the client to show a file chooser 文件选择器. added in API level 21
• This is called to handle HTML forms with 'file' input type, in response to the user pressing the "Select File" button. 这是为了响应用户按下“选择文件”按钮来处理带有“file”输入类型的HTML表单
• To cancel the request, call filePathCallback.onReceiveValue(null) and return true.
• 参数 filePathCallback: Invoke this callback to supply the list of paths to files to upload 提供要上传的文件的路径列表, or NULL to cancel. Must only be called if the showFileChooser implementations returns true.
• 参数 fileChooserParams: Describes the mode of file chooser to be opened, and options to be used with it. 描述要打开的文件选择器的模式，以及与之一起使用的选项。
• 返回值：Returns true if filePathCallback will be invoked, false to use default handling.

• void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) Notify the host application that web content from the specified origin指定源 is attempting to use the Geolocation地理定位 API, but no permission state is currently set for that origin源.
• The host application should invoke调用 the specified callback with the desired所需 permission state. See GeolocationPermissions for details 有关详细信息.
• Note that for applications targeting Android N and later更高版本的 SDKs (API level > M) this method is only called for requests originating from源自 secure origins安全起始点 such as https. On non-secure origins geolocation requests are automatically denied拒绝.
• 参数 origin: The origin of the web content attempting to use the Geolocation API.
• 参数 callback: The callback to use to set the permission state for the origin.

public void invoke (String origin, boolean allow, boolean retain)

	Sets the Geolocation permission state for the supplied origin.

Parameters

	origin	String: the origin for which permissions are set

	allow	boolean: whether or not the origin should be allowed to use the Geolocation API

	retain	boolean: whether the permission should be retained保留 beyond在...之内 the lifetime of a page currently being displayed by a WebView

• void onGeolocationPermissionsHidePrompt() Notify the host application that a request for Geolocation地理定位 permissions, made with a previous call to onGeolocationPermissionsShowPrompt() has been canceled. 通知主机应用程序，以前调用**的地理位置权限请求已被取消。
• Any related相关 UI should therefore因此 be hidden.

• void  getVisitedHistory(ValueCallback<String[]> callback)  Obtains获得 a list of all visited history items, used for link coloring. 获得所有访问历史项目的列表，用于链接着色。

• void  onExceededDatabaseQuota(String url, String databaseIdentifier, long quota, long estimatedDatabaseSize, long totalQuota, WebStorage.QuotaUpdater quotaUpdater)  This method was deprecated in API level 19. This method is no longer called; WebView now uses the HTML5 / JavaScript Quota Management API. 

全屏播放视频案例

1、清单文件设置

<uses-permission android:name="android.permission.INTERNET"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

android:configChanges="keyboardHidden|orientation|screenSize"

android:hardwareAccelerated="true"

private View mCustomView;//onShowCustomView传过来的view，其实就是我们构造的View

private CustomViewCallback mCustomViewCallback;//onShowCustomView传过来的callback

private FullscreenHolder videoFullView;//全屏播放视频时的根布局

// 播放网络视频时全屏会被调用的方法

@Override

public void onShowCustomView(View view, CustomViewCallback callback) {

	Log.i("bqt", "【onShowCustomView】" + view.getClass().getSimpleName());//FrameLayout

	if (view instanceof ViewGroup) {

		ViewGroup vp = (ViewGroup) view;

		Log.i("bqt", "【onShowCustomView】count=" + vp.getChildCount()

				+ "  type=" + vp.getChildAt(0).getClass().getSimpleName());//count=1  type=FullScreenView

	}

	activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

	if (mCustomView == null) {

		mCustomView = view;

		mCustomViewCallback = callback;

		videoFullView = new FullscreenHolder(activity);

		videoFullView.addView(mCustomView);

		((FrameLayout) activity.getWindow().getDecorView()).addView(videoFullView);

	} else callback.onCustomViewHidden();

}

// 视频播放退出全屏会被调用的

@Override

public void onHideCustomView() {

	Log.i("bqt", "【onHideCustomView】");

	// 是全屏播放状态

	if (videoFullView != null && mCustomView != null && mCustomViewCallback != null) {

		activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

		videoFullView.removeView(mCustomView);

		videoFullView.setVisibility(View.GONE);//这个不能省

		mCustomView = null;

		videoFullView = null;

		mCustomViewCallback.onCustomViewHidden();

	}

}

public boolean isOnShowCustomView() {

	return mCustomView != null;

}

@Override

//设置当点击后退按钮时不是退出Activity，而是让WebView后退一页。也可以通过webview.setOnKeyListener设置

public boolean onKeyDown(int keyCode, KeyEvent event) {

	if (keyCode == KeyEvent.KEYCODE_BACK) {

		if (mWebChromeClient != null && mWebChromeClient.isOnShowCustomView()) {

			mWebChromeClient.onHideCustomView();

			setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

			return true;

		} else if (webview.canGoBack()) {//返回网页上一页

			webview.goBack(); //后退，goForward() 前进

			return true;

		} else {//退出网页

			webview.loadUrl("about:blank");

			finish();

		}

	}

	return super.onKeyDown(keyCode, event);

}

<video width="100%p" height="150" controls="controls" poster="../icon.jpg">

    <source src="http://qnfile.ogod.xin/_F-UBAMKr_AID.mp4" type="video/mp4"/>

</video>

//********************************************以下为5.0以上，上传文件相关代码*******************************************

private ValueCallback<Uri[]> mUploadMessageForAndroid5;

public static int FILECHOOSER_RESULTCODE_FOR_ANDROID_5 = 2;

@Override

public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> uploadMsg, FileChooserParams params) {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

        Log.i("bqt", "【onShowFileChooser】 5.0+" + "   " + params.getMode() + "  " + params.getTitle() + "  "//Mode为0

                + params.isCaptureEnabled() + "  " + params.getFilenameHint() + "  " + Arrays.toString(params.getAcceptTypes()));

    }

    mUploadMessageForAndroid5 = uploadMsg;

    Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);

    contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);

    contentSelectionIntent.setType("image/*");//文件类型

    Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);

    chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);

    chooserIntent.putExtra(Intent.EXTRA_TITLE, "图片选择");

    activity.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5);

    return true;

}

//5.0以上，上传图片成功后的回调

public void mUploadMessageForAndroid5(Intent intent, int resultCode) {

    Log.i("bqt", "【上传图片成功后的回调】 5.0+");

    if (mUploadMessageForAndroid5 != null) {

        Uri result = (intent == null || resultCode != RESULT_OK) ? null : intent.getData();

        if (result != null) mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});

        else mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});

        mUploadMessageForAndroid5 = null;

    }

}

//*******************************************以下为5.0以下，上传文件相关代码***********************************************

private ValueCallback<Uri> mUploadMessage;

public static int FILECHOOSER_RESULTCODE = 1;

//The undocumented magic method override Eclipse will swear at you if you try to put @Override here

//undocumented：无正式文件的，无事实证明的；与…不协调，咒骂，发誓

// For Android 3.0-

@SuppressWarnings("unused")

public void openFileChooser(ValueCallback<Uri> uploadMsg) {

    openFileChooserImpl(uploadMsg);

}

// For Android 3.0+

@SuppressWarnings("unused")

public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {

    openFileChooserImpl(uploadMsg);

}

//For Android 4.1

@SuppressWarnings("unused")

public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {

    openFileChooserImpl(uploadMsg);

}

//低版本上传文件代码

private void openFileChooserImpl(ValueCallback<Uri> uploadMsg) {

    Log.i("bqt", "【openFileChooser】");

    mUploadMessage = uploadMsg;

    Intent i = new Intent(Intent.ACTION_GET_CONTENT);

    i.addCategory(Intent.CATEGORY_OPENABLE);

    i.setType("image/*");

    activity.startActivityForResult(Intent.createChooser(i, "文件选择"), FILECHOOSER_RESULTCODE);

}

//5.0以下，上传图片成功后的回调

public void mUploadMessage(Intent intent, int resultCode) {

    Log.i("bqt", "【上传图片成功后的回调】 5.0-");

    if (mUploadMessage != null) {

        if (intent != null && resultCode == RESULT_OK) mUploadMessage.onReceiveValue(intent.getData());

        mUploadMessage = null;

    }

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {

    Log.i("bqt", "【onActivityResult】 requestCode=" + requestCode + "  resultCode=" + resultCode);

    //上传图片之后的回调

    if (requestCode == MyWebChromeClient.FILECHOOSER_RESULTCODE) {

        mWebChromeClient.mUploadMessage(intent, resultCode);

    } else if (requestCode == MyWebChromeClient.FILECHOOSER_RESULTCODE_FOR_ANDROID_5) {

        mWebChromeClient.mUploadMessageForAndroid5(intent, resultCode);

    }

}

<!DOCTYPE html>

<html>

<head>

    <meta charset="UTF-8">

    <title>图片上传预览</title>

    <script type="text/javascript">

    function imgPreview(fileDom){

        //判断是否支持FileReader

        if (window.FileReader) var reader = new FileReader();

         else alert("您的设备不支持图片预览功能，如需该功能请升级您的设备！");

        //获取文件

        var file = fileDom.files[0];

        var imageType = /^image\//;

        //是否是图片

        if (!imageType.test(file.type)) {

            alert("请选择图片！");

            return;

        }

        //读取完成

        reader.onload = function(e) {

            //获取图片dom

            var img = document.getElementById("preview");

            //图片路径设置为读取的图片

            img.src = e.target.result;

        };

        reader.readAsDataURL(file);

    }

    </script>

</head>

<body>

<img id="preview" width="100%P"/>

<br/>

<input type="file" name="file" onchange="imgPreview(this)"/>

</body>

</html>

public class MyWebChromeClient extends WebChromeClient {

	private WebViewActivity activity;//控件的显示和隐藏应该都由WebViewClient控制

	public MyWebChromeClient(WebViewActivity activity) {

		super();

		this.activity = activity;

	}

	@Override

	public void onProgressChanged(WebView view, int newProgress) {

		Log.i("bqt", "【onProgressChanged】  " + newProgress);

		if (activity.getProgress_bar() != null) activity.getProgress_bar().setProgress(newProgress);

		super.onProgressChanged(view, newProgress);

	}

	@Override

	public boolean onJsAlert(WebView view, String url, String message, JsResult result) {

		//If the client returns true, WebView will assume that the client will handle the dialog. Otherwise, it will continue execution执行.

		boolean b = new Random().nextBoolean();

		Log.i("bqt", "【onJsAlert】" + b + "  " + url + "  " + message);

		if (b) return super.onJsAlert(view, url, message, result);//默认为return false，有弹窗

		else {//拦截html中alert函数之后，我们可以在这里做任何自己的操作。我们还可以根据message来做不同的操作

			Toast.makeText(view.getContext(), "onJsAlert，message=" + message, Toast.LENGTH_SHORT).show();

			result.confirm();//confirm()表示点击了弹出框的确定按钮，cancel()则表示点击了弹出框的取消按钮。两者必须调用一个

			return true;//如果return true，不弹出对话框了；否则，会继续弹出对话框

		}

	}

	@Override

	public boolean onJsConfirm(WebView view, String url, String message, JsResult result) {

		boolean b = new Random().nextBoolean();

		Log.i("bqt", "【onJsConfirm】" + b + "  " + url + "  " + message);

		//return super.onJsConfirm(view, url, message, result);//默认为return false，有弹窗

		Toast.makeText(view.getContext(), "onJsConfirm，message=" + message, Toast.LENGTH_SHORT).show();

		result.confirm();

		return b;//如果return true，不弹出对话框了；否则，会继续弹出对话框

	}

	@Override

	public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {

		boolean b = new Random().nextBoolean();

		Log.i("bqt", "【onJsPrompt】" + b + "  " + url + "  " + message + "  " + defaultValue);

		Toast.makeText(view.getContext(), "亲，请输入你的昵称", Toast.LENGTH_SHORT).show();

		return super.onJsPrompt(view, url, message, defaultValue, result);//默认为return false，有弹窗

	}

	@Override

	public boolean onJsBeforeUnload(WebView view, String url, String message, JsResult result) {

		boolean b = new Random().nextBoolean();

		Log.i("bqt", "【onJsBeforeUnload】" + b + "  " + url + "  " + message);

		return super.onJsBeforeUnload(view, url, message, result);

	}

	@Override

	public boolean onConsoleMessage(ConsoleMessage consoleMessage) {

		Log.i("bqt", "【onConsoleMessage】" + "\nmessage=" + consoleMessage.message()

				+ "\nlineNumber=" + consoleMessage.lineNumber()

				+ "\nmessageLevel=" + consoleMessage.messageLevel() + "\nsourceId=" + consoleMessage.sourceId());

		return super.onConsoleMessage(consoleMessage);

	}

	@Override

	public void onReceivedTitle(WebView view, String title) {

		Log.i("bqt", "【onReceivedTitle 标题】" + title);

		activity.getTv_title().setText(title);

		super.onReceivedTitle(view, title);

	}

	@Override

	public void onReceivedIcon(WebView view, Bitmap icon) {

		Log.i("bqt", "【onReceivedIcon 图标】");

		activity.getIv_icon().setVisibility(View.VISIBLE);

		activity.getIv_icon().setImageBitmap(icon);

		super.onReceivedIcon(view, icon);

	}

	@Override

	public void onReceivedTouchIconUrl(WebView view, String url, boolean precomposed) {

		//【url】The icon url.   【precomposed】True if the url is for a precomposed touch icon.

		Log.i("bqt", "【onReceivedTouchIconUrl 苹果图标】" + precomposed + "  " + url);

		super.onReceivedTouchIconUrl(view, url, precomposed);

	}

	//获得所有访问历史项目的列表，用于链接着色。

	@Override

	public void getVisitedHistory(ValueCallback<String[]> callback) {

		Log.i("bqt", "【getVisitedHistory 不知道怎么用】" + callback.toString());

		super.getVisitedHistory(callback);

	}

	@Override

	public boolean onCreateWindow(WebView webView, boolean isDialog, boolean isUserGesture, Message resultMsg) {

		Log.i("bqt", "【onCreateWindow】 " + isDialog + "  " + isUserGesture + "\n详细信息" + resultMsg.toString());

		return super.onCreateWindow(webView, isDialog, isUserGesture, resultMsg);//默认是returns false

	}

	@Override

	public void onCloseWindow(WebView window) {

		Log.i("bqt", "【onCloseWindow】");

		super.onCloseWindow(window);

	}

	@Override

	public void onPermissionRequest(PermissionRequest request) {

		Log.i("bqt", "【onPermissionRequest】");

		//The host application must invoke grant(String[]) or deny(). If this method isn't overridden, the permission is denied拒绝.

		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

			Log.i("bqt", "Origin=" + request.getOrigin().toString() + "   Resources=" + Arrays.toString(request.getResources()));

		}

		super.onPermissionRequest(request);

	}

	@Override

	public void onPermissionRequestCanceled(PermissionRequest request) {

		Log.i("bqt", "【onPermissionRequestCanceled】");

		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

			Log.i("bqt", "Origin=" + request.getOrigin().toString() + "   Resources=" + Arrays.toString(request.getResources()));

		}

		super.onPermissionRequestCanceled(request);

	}

	@Override

	public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {

		Log.i("bqt", "【onGeolocationPermissionsShowPrompt】" + origin);

		//callback只有一个方法【public void invoke(String origin, boolean allow, boolean retain)】

		super.onGeolocationPermissionsShowPrompt(origin, callback);

	}

	@Override

	public void onGeolocationPermissionsHidePrompt() {

		Log.i("bqt", "【onGeolocationPermissionsHidePrompt】");

		super.onGeolocationPermissionsHidePrompt();

	}

	@Override

	public void onRequestFocus(WebView view) {

		Log.i("bqt", "【onRequestFocus】" + (view == activity.getWebview()));

		super.onRequestFocus(view);

	}

	@Override

	public Bitmap getDefaultVideoPoster() {

		Log.i("bqt", "【getDefaultVideoPoster】");

		return BitmapFactory.decodeResource(activity.getResources(), R.drawable.ic_launcher);

		//return super.getDefaultVideoPoster(); //return null;

	}

	private ImageView loadingView;

	// 视频加载时进程loading

	@Override

	public View getVideoLoadingProgressView() {

		Log.i("bqt", "【getVideoLoadingProgressView】");

		if (loadingView != null) return loadingView;

		else {

			loadingView = new ImageView(activity);

			loadingView.setImageResource(R.drawable.icon);

			return loadingView;

		}

		//else return super.getVideoLoadingProgressView();//return null;

	}

	//*****************                ↓↓↓↓↓↓↓↓↓↓↓↓↓↓      以下为全屏播放视频相关代码      ↓↓↓↓↓↓↓↓↓↓↓↓↓             *******************

	private View mCustomView;//onShowCustomView传过来的view，其实就是我们构造的View

	private CustomViewCallback mCustomViewCallback;//onShowCustomView传过来的callback

	private FullscreenHolder videoFullView;//全屏播放视频时的根布局

	// 播放网络视频时全屏会被调用的方法

	@Override

	public void onShowCustomView(View view, CustomViewCallback callback) {

		Log.i("bqt", "【onShowCustomView】" + view.getClass().getSimpleName());//FrameLayout

		if (view instanceof ViewGroup) {

			ViewGroup vp = (ViewGroup) view;

			Log.i("bqt", "【onShowCustomView】count=" + vp.getChildCount()

					+ "  type=" + vp.getChildAt(0).getClass().getSimpleName());//count=1  type=FullScreenView

		}

		activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

		if (mCustomView == null) {

			mCustomView = view;

			mCustomViewCallback = callback;

			videoFullView = new FullscreenHolder(activity);

			videoFullView.addView(mCustomView);

			((FrameLayout) activity.getWindow().getDecorView()).addView(videoFullView);

		} else callback.onCustomViewHidden();

	}

	// 视频播放退出全屏会被调用的

	@Override

	public void onHideCustomView() {

		Log.i("bqt", "【onHideCustomView】");

		// 是全屏播放状态

		if (videoFullView != null && mCustomView != null && mCustomViewCallback != null) {

			activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

			videoFullView.removeView(mCustomView);

			videoFullView.setVisibility(View.GONE);//这个不能省

			mCustomView = null;

			videoFullView = null;

			mCustomViewCallback.onCustomViewHidden();

		}

	}

	public boolean isOnShowCustomView() {

		return mCustomView != null;

	}

	//*****************                ↑↑↑↑↑↑↑↑↑↑↑↑↑↑      以上为全屏播放视频相关代码      ↑↑↑↑↑↑↑↑↑↑↑↑↑             *******************

	//********************************************以下为5.0以上，上传文件相关代码*******************************************

	private ValueCallback<Uri[]> mUploadMessageForAndroid5;

	public static int FILECHOOSER_RESULTCODE_FOR_ANDROID_5 = 2;

	@Override

	public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> uploadMsg, FileChooserParams params) {

		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

			Log.i("bqt", "【onShowFileChooser】 5.0+" + "   " + params.getMode() + "  " + params.getTitle() + "  "//Mode为0

					+ params.isCaptureEnabled() + "  " + params.getFilenameHint() + "  " + Arrays.toString(params.getAcceptTypes()));

		}

		mUploadMessageForAndroid5 = uploadMsg;

		Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);

		contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);

		contentSelectionIntent.setType("image/*");//文件类型

		Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);

		chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);

		chooserIntent.putExtra(Intent.EXTRA_TITLE, "图片选择");

		activity.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5);

		return true;

	}

	//5.0以上，上传图片成功后的回调

	public void mUploadMessageForAndroid5(Intent intent, int resultCode) {

		Log.i("bqt", "【上传图片成功后的回调】 5.0+");

		if (mUploadMessageForAndroid5 != null) {

			Uri result = (intent == null || resultCode != Activity.RESULT_OK) ? null : intent.getData();

			if (result != null) mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});

			else mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});

			mUploadMessageForAndroid5 = null;

		}

	}

	//*******************************************以下为5.0以下，上传文件相关代码***********************************************

	private ValueCallback<Uri> mUploadMessage;

	public static int FILECHOOSER_RESULTCODE = 1;

	//The undocumented magic method override Eclipse will swear at you if you try to put @Override here

	//undocumented：无正式文件的，无事实证明的；与…不协调，咒骂，发誓

	// For Android 3.0-

	@SuppressWarnings("unused")

	public void openFileChooser(ValueCallback<Uri> uploadMsg) {

		openFileChooserImpl(uploadMsg);

	}

	// For Android 3.0+

	@SuppressWarnings("unused")

	public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {

		openFileChooserImpl(uploadMsg);

	}

	//For Android 4.1

	@SuppressWarnings("unused")

	public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {

		openFileChooserImpl(uploadMsg);

	}

	//低版本上传文件代码

	private void openFileChooserImpl(ValueCallback<Uri> uploadMsg) {

		Log.i("bqt", "【openFileChooser】");

		mUploadMessage = uploadMsg;

		Intent i = new Intent(Intent.ACTION_GET_CONTENT);

		i.addCategory(Intent.CATEGORY_OPENABLE);

		i.setType("image/*");

		activity.startActivityForResult(Intent.createChooser(i, "文件选择"), FILECHOOSER_RESULTCODE);

	}

	//5.0以下，上传图片成功后的回调

	public void mUploadMessage(Intent intent, int resultCode) {

		Log.i("bqt", "【上传图片成功后的回调】 5.0-");

		if (mUploadMessage != null) {

			if (intent != null && resultCode == Activity.RESULT_OK) mUploadMessage.onReceiveValue(intent.getData());

			mUploadMessage = null;

		}

	}

}

WebViewActivity.start(this, WebSettingsModel.newBuilder()

		.url("file:///android_asset/h5/WebChromeClient演示.html")

		.setJavaScriptEnabled(true)

		.setDomStorageEnabled(true)//这句话必须保留，否则无法播放优酷网页视频，其他的可以

		.setSupportMultipleWindows(true)

		.setMixedContentMode(WebSettingsModel.MIXED_CONTENT_ALWAYS_ALLOW)//我觉得这个设置一般都很有必要

		.setGeolocationEnabled(true)

		.build());

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<button onclick="alert('alert弹框')">alert</button>

&nbsp;

<button onclick="confirm('confirm弹框')">confirm</button>

&nbsp;

<button onclick="prompt('prompt弹框','包青天')">prompt</button>

<p></p>

<button onclick="log()">调用console打印日志</button>

&nbsp;

<button onclick="window.close()">关闭窗口</button>

<h2>链接</h2>

<a href="file:///android_asset/h5/test.html" title="新窗口" target="_blank">有target属性的链接</a>

<p></p>

<a href="http://v.youku.com/v_show/id_XODkxMjcyNzAw.html?spm=a2h1n.8251845.0.0" title="网页视频">没有target属性的链接，网页视频</a>

<p></p>

<a href="file:///android_asset/h5/uploadPic.html" title="图片上传预览">图片上传预览</a>

<h2>视频</h2>

ogod视频，没有poster属性

<p></p>

<video width="100%p" controls="controls">

    <source src="http://qnfile.ogod.xin/_F-UBALyBRgEC.mp4" type="video/mp4"/>

</video>

ogod视频，有poster属性

<p></p>

<video width="100%p" controls="controls" poster="../icon.jpg">

    <source src="http://qnfile.ogod.xin/_F-UBAMKr_AID.mp4"

            type="video/mp4"/>

</video>

</body>

<script type="text/javascript">

function log(){

  console.log("log日志");

  console.warn("warn日志");

  console.error("error日志");

}

</script>

</html>