android关于加载本地html5的问题(解决办法)

     前面已经得出android中加载本地html5所遇到问题的原因，针对这个原因，目前有以下两种解决方案，第一种解决方案：

     对于每一个景区，新建一个android application，然后将动景手动复制到工程的asset中，然后用webView从asset中加载动景，这样就避免了webkit内核禁止加载本地html5的问题，然后将应用打包成apk，这样每次都下载景区对应的动景apk，下载完之后自动安装，这样只需要访问apk就可以解决了，安装apk：

           public static boolean install(Context context, String filePath) {

 

            Intent i = new Intent(Intent. ACTION_VIEW);

 

            File file = new File(filePath);

 

             if (file != null && file.length() > 0 && file.exists() && file.isFile()) {

 

                   i.setDataAndType(Uri.parse("file://" + filePath),

                               "application/vnd.android.package-archive" );

 

                   i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

 

                  context.startActivity( i);

 

                   return true ;

 

            }

 

             return false ;

 

      }

     安装完之后，我们只需要根据apk的包名去访问apk,代码如下：

     Intent intent = new Intent(Intent. ACTION_MAIN);

     intent.addCategory(Intent. CATEGORY_LAUNCHER);

      ComponentName cn = new ComponentName("com.ly" , "com.ly.MainActivity");

      intent.setComponent(cn);

      startActivity(intent);

     其中new ComponentName("com.ly" , "com.ly.MainActivity" )中所传的第一个参数是要访问的apk的包名，第二个参数是要访问的apk的入口的activity的类名（包括包名）。

 

 

     接着，我们来介绍第二种解决方案，既然weblit内核的浏览器可以调用服务器的html5，那我们为何不在本地写一个服务器，然后通过访问本地的服务器去加载本地的html5,这样就不存在安全性设置的问题了。在这里，我们在服务器端先采用单线程去处理客户端发送过来的请求。下面是服务器的源码：

     public class HttpServer implements Runnable {

       static HttpServer httpServer;

       private static final String TAG = "HttpServer";

       /**

       * 服务器端的socket

       */

      ServerSocket server;

       /**

       * 服务器监听的端口号

       */

       public static final int PORT = 8080;

 

       // public static HttpServer getInstance(){

       // if(httpServer == null){

       // httpServer = new HttpServer();

       // }

       // return httpServer;

       // }

 

       public HttpServer() {

             try {

                   server = new ServerSocket(PORT);

            } catch (IOException e) {

                   // TODO Auto-generated catch block

                  Log. i(TAG, "异常信息：" + e.getMessage());

            }

             new Thread(this).start();

            Log. i(TAG, "server is start......");

      }

 

       public void run() {

             // 服务器端连续监听客户端

             while (true ) {

                  Socket client = null;

                   try {

                        client = server.accept();

                         // 创建分线程

//                      httpRequestHandler request = new httpRequestHandler(client);

//                      // 启动线程

//                      new Thread(request).start();

                         if(client!=null){

                         Log. i(TAG, "已连接到服务器：" +client);

                         //获取客户端的输入流

                         BufferedReader in = new BufferedReader(new

                         InputStreamReader(client.getInputStream()));

                         //读取第一行

                         String line = in.readLine();

                         if(line==null||line.equals("")||line.equals( "\r\n")){

                         break;

                         }

                         Log. i(TAG, "客户端发送的消息是：" +line);

                         String[] tokens = line.split( " ");

                         if(tokens[0].equalsIgnoreCase("GET" )){

                         String fileName = tokens[1];

                         fileService(fileName, client);

                         }

                         }

                  } catch (IOException e) {

                         // TODO Auto-generated catch block

                        e.printStackTrace();

                  }

            }

 

      }

 

       /**

       * 读取文件的内容

       *

       * @param fileName

       * @param socket

       */

       public void fileService(String fileName, Socket socket) {

            PrintStream os = null;

             try {

                  os = new PrintStream(socket.getOutputStream(), true);

                  File file = new File(fileName);

                   if (file.exists() && !file.isDirectory()) {

                        os.println( " HTTP/1.0 200 OK "); // 返回应答消息,并结束应答

                        os.println( " Content-Type:" + generatecontentType(fileName));

                        os.println( " Content-Length: " + file.length()); // 返回内容字节数

                        os.println();

                        FileInputStream fis = null;

                         try {

                              fis = new FileInputStream(file);

                        } catch (FileNotFoundException e) {

                               // TODO Auto-generated catch block

                              os.println( "HTTP/1.0 404" + e.getMessage());

                        }

                         byte[] buffer = null;

                        Log. i(TAG, "文件大小：" + buffer. length);

                        Log. i(TAG, "内容：" + buffer.toString());

 

                        buffer = new byte [fis.available()];

                        fis.read(buffer);

                        os.write(buffer);

                        os.flush();

                        os.close();

                        fis.close();

                        socket.close();

                  } else {

                        os.println( "HTTP/1.0 404 FileNotFonud!" );

                        os.close();

                  }

            } catch (IOException e) {

                   // TODO Auto-generated catch block

                  os.println( "HTTP/1.0 404" + e.getMessage());

            }

 

      }

 

       private String generatecontentType(String fileName) {

             if (fileName.endsWith("html" ) || fileName.endsWith("htm")

                        || fileName.endsWith( "xml")) {

                   return "text/html" ;

            } else if (fileName.endsWith("png")) {

                   return "application/binarary" ;

            } else if (fileName.endsWith("jpg")) {

                   return "image/jpeg" ;

            } else if (fileName.endsWith("js")) {

                   return "application/x-javascript" ;

            } else if (fileName.endsWith("swf")) {

                   return "application/x-shockwave-flash" ;

            }

             return "*/*" ;

      }

}