如何使用套接字将文件从服务器传输到Android Mobile并保持其格式.它可以是任何文件,例如pdf,html,png,txt等.我想将此文件从Server推送到Android Mobile,但是在Mobile端保存文件时,我想知道来自Server的文件格式.那怎么办呢?
private class ClientRxThread extends Thread {
String dstAddress;
int dstPort;
ClientRxThread(String address, int port) {
dstAddress = address;
dstPort = port;
}
@Override
public void run() {
Socket socket = null;
try {
socket = new Socket(dstAddress, dstPort);
String name = "test";
File file = new File(
Environment.getExternalStorageDirectory(),
name);
ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
byte[] bytes;
FileOutputStream fos = null;
try {
bytes = (byte[])ois.readObject();
fos = new FileOutputStream(file);
fos.write(bytes);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if(fos!=null){
fos.close();
}
}
socket.close();
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this,
"Finished",
Toast.LENGTH_LONG).show();
}});
} catch (IOException e) {
e.printStackTrace();
final String eMsg = "Something wrong: " + e.getMessage();
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this,
eMsg,
Toast.LENGTH_LONG).show();
}});
} finally {
if(socket != null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
这是客户端
我想知道如何获取从服务器发送的文件的文件格式
String name = "test";
File file = new File(
Environment.getExternalStorageDirectory(),
name);
想知道如何查找从SERVER发送的文件的文件格式.服务器中的文件可以是html,png或txt FILE
服务器端相关代码
public class FileTxThread extends Thread {
Socket socket;
FileTxThread(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
File file = new File(
Environment.getExternalStorageDirectory(),
"test.png");
byte[] bytes = new byte[(int) file.length()];
BufferedInputStream bis;
try {
bis = new BufferedInputStream(new FileInputStream(file));
bis.read(bytes, 0, bytes.length);
ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
oos.writeObject(bytes);
oos.flush();
socket.close();
final String sentMsg = "File sent to: " + socket.getInetAddress();
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this,
sentMsg,
Toast.LENGTH_LONG).show();
}
});
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
File file = new File(
Environment.getExternalStorageDirectory(),
"test.png");
test.png可以具有png,html,txt扩展名.那么有没有办法发送扩展名?
解决方法:
在服务器端也发送文件名.
File file = new File(Environment.getExternalStorageDirectory(),
"test.png");
ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
oos.writeObject(file.getName().getBytes());
oos.flush();
//then send the file
在客户端首先接收该名称,然后将文件作为第二个对象读取
byte[] fileNameBytes = (byte[])ois.readObject();
String name = new String(fileNameBytes);
//read the second object as file
标签:sockets,java,android 来源: https://codeday.me/bug/20191119/2038642.html
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