webkit下DownloadListener

看官方的API很简单，它是webkit下的一个接口，该接口就一个抽象方法：onDownloadStart：

public abstract void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength)

Added in API level 1

Notify the host application that a file should be downloaded

Parameters

url The full url to the content that should be downloadeduserAgent the user agent to be used for the download.contentDisposition Content-disposition http header, if present.mimetype The mimetype of the content reported by the servercontentLength The file size reported by the server

不用多解释。

下面是它的源码，也非常简单：

/** * Copyright (C) 2007 The Android Open Source Project * * 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 android.webkit;public interface DownloadListener {    /***     * Notify the host application that a file should be downloaded     * @param url The full url to the content that should be downloaded     * @param userAgent the user agent to be used for the download.     * @param contentDisposition Content-disposition http header, if      *                           present.     * @param mimetype The mimetype of the content reported by the server     * @param contentLength The file size reported by the server     */    public void onDownloadStart(String url, String userAgent,            String contentDisposition, String mimetype, long contentLength);}