下面一行在我的code将*的.apk文件到我的包目录。

 最后文件f =新的文件（Environment.getExternalStorageDirectory（）+/
                        + context.getPackageName（）+/ wifip2pshared-+ System.currentTimeMillis的（）
                        +的apk）;
 

如何修改一样的，所以它会下载每次/转移到Android手机的下载目录。我相信，下载目录是每个android手机默认的目录。

目前它被转移到包的目录，例如说com.example.android.wifidirect

编辑我做了基于Manish的解决方案：

  @覆盖
        保护字符串doInBackground（空... PARAMS）{
            尝试 {
                ServerSocket的ServerSocket的=新的ServerSocket（8988）;
                Log.d（WiFiDirectActivity.TAG，服务器：插座开）;
                客户端的Socket的ServerSocket.accept =（）;
                Log.d（WiFiDirectActivity.TAG，服务器：连接完成的）;
                字符串extStorageDirectory =环境
                        .getExternalStorageDirectory（）的toString（）。
                文件夹=新的文件（extStorageDirectory，下载）;


档案文件=新的文件（文件夹，wifip2pshared-+ System.currentTimeMillis的（）+.apk文件）;
                尝试 {
                    file.createNewFile（）;
                }赶上（IOException异常E1）{
                    e1.printStackTrace（）;
                }


                Log.d（WiFiDirectActivity.TAG，服务器：复制文件+ file.toString（））;
                InputStream中的InputStream = client.getInputStream（）;
                的CopyFile（InputStream的，新的FileOutputStream（文件））;
                serverSocket.close（）;
                返回file.getAbsolutePath（）;
            }赶上（IOException异常E）{
                Log.e（WiFiDirectActivity.TAG，e.getMessage（））;
                返回null;
            }
        }
 

解决方案

请试试这个code -

 档案文件=新的文件（Environment.getExternalStorageDirectory（）
                .getAbsolutePath（）+/下载/ wifip2pshared-+ System.currentTimeMillis的（）
                +的apk）;
 

编辑：您可以试试这个code也，希望这将有助于为创建不同的名称每次

 字符串extStorageDirectory =环境
                    .getExternalStorageDirectory（）的toString（）。
            文件夹=新的文件（extStorageDirectory，下载）;
            档案文件=新的文件（文件夹中，wifip2pshared-+ System.currentTimeMillis的（）+.apk文件）;
            尝试 {
                file.createNewFile（）;
            }赶上（IOException异常E1）{
                e1.printStackTrace（）;
            }
 

修改在您的具体需求。

 保护字符串doInBackground（空... PARAMS）{
        尝试 {
            ServerSocket的ServerSocket的=新的ServerSocket（8988）;
            Log.d（WiFiDirectActivity.TAG，服务器：插座开）;
            客户端的Socket的ServerSocket.accept =（）;
            Log.d（WiFiDirectActivity.TAG，服务器：连接完成的）;
            。字符串extStorageDirectory = Environment.getExternalStorageDirectory（）的toString（）;
            文件夹=新的文件（extStorageDirectory，下载）;
            档案文件=新的文件（文件夹，wifixyz-+ System.currentTimeMillis的（）+APK）;
            尝试 {
                file.createNewFile（）;
            }赶上（IOException异常E1）{
                e1.printStackTrace（）;
            }

            Log.d（WiFiDirectActivity.TAG，服务器：复制文件+ file.toString（））;
            InputStream中的InputStream = client.getInputStream（）;
            的CopyFile（InputStream的，新的FileOutputStream（文件））;
            serverSocket.close（）;
            返回file.getAbsolutePath（）;
        }赶上（IOException异常E）{
            Log.e（WiFiDirectActivity.TAG，e.getMessage（））;
            返回null;
        }
    }
 

谢谢！

The below line in my code transfers *.apk file to my package directory.

 final File f = new File(Environment.getExternalStorageDirectory() + "/"
                        + context.getPackageName() + "/wifip2pshared-" + System.currentTimeMillis()
                        + ".apk");

How to modify the same so that each time it gets downloaded/transferred to downloads directory of android phone. I believe Downloads directory is a default directory in each android phone.

Currently it gets transferred to package directory say for example "com.example.android.wifidirect"

EDIT I made based on Manish's Solution:

@Override
        protected String doInBackground(Void... params) {
            try {
                ServerSocket serverSocket = new ServerSocket(8988);
                Log.d(WiFiDirectActivity.TAG, "Server: Socket opened");
                Socket client = serverSocket.accept();
                Log.d(WiFiDirectActivity.TAG, "Server: connection done");
                String extStorageDirectory = Environment
                        .getExternalStorageDirectory().toString();
                File folder = new File(extStorageDirectory, "Download");


File file = new File(folder,"wifip2pshared-" + System.currentTimeMillis()+ ".apk");
                try {
                    file.createNewFile();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }


                Log.d(WiFiDirectActivity.TAG, "server: copying files " + file.toString());
                InputStream inputstream = client.getInputStream();
                copyFile(inputstream, new FileOutputStream(file));
                serverSocket.close();
                return file.getAbsolutePath();
            } catch (IOException e) {
                Log.e(WiFiDirectActivity.TAG, e.getMessage());
                return null;
            }
        }

Please try this code-

 File file = new File(Environment.getExternalStorageDirectory()
                .getAbsolutePath() + "/Download/wifip2pshared-" + System.currentTimeMillis()
                + ".apk");

EDIT: You can try this code also, hope it will help for create different name every time.

String extStorageDirectory = Environment
                    .getExternalStorageDirectory().toString();
            File folder = new File(extStorageDirectory, "Download");
            File file = new File(folder, wifip2pshared-" + System.currentTimeMillis()+ ".apk");
            try {
                file.createNewFile();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

EDIT On your specific demand..

protected String doInBackground(Void... params) {
        try {
            ServerSocket serverSocket = new ServerSocket(8988);
            Log.d(WiFiDirectActivity.TAG, "Server: Socket opened");
            Socket client = serverSocket.accept();
            Log.d(WiFiDirectActivity.TAG, "Server: connection done");
            String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
            File folder = new File(extStorageDirectory, "Download");
            File file = new File(folder,"wifixyz-" + System.currentTimeMillis()+".apk");
            try {
                file.createNewFile();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

            Log.d(WiFiDirectActivity.TAG, "server: copying files " + file.toString());
            InputStream inputstream = client.getInputStream();
            copyFile(inputstream, new FileOutputStream(file));
            serverSocket.close();
            return file.getAbsolutePath();
        } catch (IOException e) {
            Log.e(WiFiDirectActivity.TAG, e.getMessage());
            return null;
        }
    }

Thanks!