Android手机间使用socket进行文件互传实例
这是一个Android手机间文件传输的例子，两个手机同时装上此app，然后输入接收端的ip，选择文件，可以多选，点确定，就发送到另一个手机，一个简单快捷文件快传实例。可以直接运用到项目中。
下面是文件选择器：
代码
首先加入文件选择库
compile 'com.nononsenseapps:filepicker:2.5.2'
这个库的地址和用法在：https://github.com/spacecowboy/NoNonsense-FilePicker
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:id="@+id/tvMsg" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:focusable="false" android:focusableInTouchMode="false" android:text="TextView" android:textColor="#AAA" /> <EditText android:id="@+id/txtIP" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/tvMsg" android:layout_centerVertical="true" android:contentDescription="目标IP地址" android:ems="10" android:text="192.168.1.100" /> <EditText android:id="@+id/txtPort" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignLeft="@+id/txtIP" android:layout_below="@+id/txtIP" android:ems="10" android:text="9999" /> <EditText android:id="@+id/et" android:layout_width="match_parent" android:layout_height="180dp" android:layout_alignLeft="@+id/txtIP" android:layout_below="@+id/txtPort" android:clickable="false" android:editable="false" android:ems="10" android:focusable="false" android:focusableInTouchMode="false" android:gravity="center_vertical|left|top" android:inputType="textMultiLine" android:longClickable="false" android:scrollbarAlwaysDrawVerticalTrack="true" android:scrollbarStyle="insideInset" android:scrollbars="vertical" android:textSize="15dp" > <requestFocus /> </EditText> <Button android:id="@+id/btnSend" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignLeft="@+id/txtPort" android:layout_below="@+id/et" android:text="选择文件并发送" /> </RelativeLayout>
MainActivity.class
public class MainActivity extends AppCompatActivity { private static final int FILE_CODE = 0; private TextView tvMsg; private EditText txtIP, txtPort, txtEt; private Button btnSend; private Handler handler; private SocketManager socketManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tvMsg = (TextView)findViewById(R.id.tvMsg); txtIP = (EditText)findViewById(R.id.txtIP); txtPort = (EditText)findViewById(R.id.txtPort); txtEt = (EditText)findViewById(R.id.et); btnSend = (Button)findViewById(R.id.btnSend); btnSend.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { Intent i = new Intent(MainActivity.this, FilePickerActivity.class); i.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, true); i.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, false); i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_FILE); i.putExtra(FilePickerActivity.EXTRA_START_PATH, Environment.getExternalStorageDirectory().getPath()); startActivityForResult(i, FILE_CODE); } }); handler = new Handler(){ @Override public void handleMessage(Message msg) { switch(msg.what){ case 0: SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss"); txtEt.append("\n[" + format.format(new Date()) + "]" + msg.obj.toString()); break; case 1: tvMsg.setText("本机IP：" + GetIpAddress() + " 监听端口:" + msg.obj.toString()); break; case 2: Toast.makeText(getApplicationContext(), msg.obj.toString(), Toast.LENGTH_SHORT).show(); break; } } }; socketManager = new SocketManager(handler); } @TargetApi(Build.VERSION_CODES.JELLY_BEAN) @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == FILE_CODE && resultCode == Activity.RESULT_OK) { final String ipAddress = txtIP.getText().toString(); final int port = Integer.parseInt(txtPort.getText().toString()); if (data.getBooleanExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, true)) { // For JellyBean and above if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { ClipData clip = data.getClipData(); final ArrayList<String> fileNames = new ArrayList<>(); final ArrayList<String> paths = new ArrayList<>(); if (clip != null) { for (int i = 0; i < clip.getItemCount(); i++) { Uri uri = clip.getItemAt(i).getUri(); paths.add(uri.getPath()); fileNames.add(uri.getLastPathSegment()); } Message.obtain(handler, 0, "正在发送至" + ipAddress + ":" + port).sendToTarget(); Thread sendThread = new Thread(new Runnable(){ @Override public void run() { socketManager.SendFile(fileNames, paths, ipAddress, port); } }); sendThread.start(); } } else { final ArrayList<String> paths = data.getStringArrayListExtra (FilePickerActivity.EXTRA_PATHS); final ArrayList<String> fileNames = new ArrayList<>(); if (paths != null) { for (String path: paths) { Uri uri = Uri.parse(path); paths.add(uri.getPath()); fileNames.add(uri.getLastPathSegment()); socketManager.SendFile(fileNames, paths, ipAddress, port); } Message.obtain(handler, 0, "正在发送至" + ipAddress + ":" + port).sendToTarget(); Thread sendThread = new Thread(new Runnable(){ @Override public void run() { socketManager.SendFile(fileNames, paths, ipAddress, port); } }); sendThread.start(); } } } } } @Override protected void onDestroy() { super.onDestroy(); System.exit(0); } public String GetIpAddress() {
WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE); WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int i = wifiInfo.getIpAddress(); return (i & 0xFF) + "." + ((i >> 8 ) & 0xFF) + "." + ((i >> 16 ) & 0xFF)+ "." + ((i >> 24 ) & 0xFF ); } }
SocketManager.class
public class SocketManager { private ServerSocket server; private Handler handler = null; public SocketManager(Handler handler){ this.handler = handler; int port = 9999; while(port > 9000){ try { server = new ServerSocket(port); break; } catch (Exception e) { port--; } } SendMessage(1, port); Thread receiveFileThread = new Thread(new Runnable(){ @Override public void run() { while(true){ ReceiveFile(); } } }); receiveFileThread.start(); } void SendMessage(int what, Object obj){ if (handler != null){ Message.obtain(handler, what, obj).sendToTarget(); } } void ReceiveFile(){ try{ Socket name = server.accept(); InputStream nameStream = name.getInputStream(); InputStreamReader streamReader = new InputStreamReader(nameStream); BufferedReader br = new BufferedReader(streamReader); String fileName = br.readLine(); br.close(); streamReader.close(); nameStream.close(); name.close(); SendMessage(0, "正在接收:" + fileName); Socket data = server.accept(); InputStream dataStream = data.getInputStream(); String savePath = Environment.getExternalStorageDirectory().getPath() + "/" + fileName; FileOutputStream file = new FileOutputStream(savePath, false); byte[] buffer = new byte[1024]; int size = -1; while ((size = dataStream.read(buffer)) != -1){ file.write(buffer, 0 ,size); } file.close(); dataStream.close(); data.close(); SendMessage(0, fileName + "接收完成"); }catch(Exception e){ SendMessage(0, "接收错误:\n" + e.getMessage()); } } public void SendFile(ArrayList<String> fileName, ArrayList<String> path, String ipAddress, int port){ try { for (int i = 0; i < fileName.size(); i++){ Socket name = new Socket(ipAddress, port); OutputStream outputName = name.getOutputStream(); OutputStreamWriter outputWriter = new OutputStreamWriter(outputName); BufferedWriter bwName = new BufferedWriter(outputWriter); bwName.write(fileName.get(i)); bwName.close(); outputWriter.close(); outputName.close(); name.close(); SendMessage(0, "正在发送" + fileName.get(i)); Socket data = new Socket(ipAddress, port); OutputStream outputData = data.getOutputStream(); FileInputStream fileInput = new FileInputStream(path.get(i)); int size = -1; byte[] buffer = new byte[1024]; while((size = fileInput.read(buffer, 0, 1024)) != -1){ outputData.write(buffer, 0, size); } outputData.close(); fileInput.close(); data.close(); SendMessage(0, fileName.get(i) + " 发送完成"); } SendMessage(0, "所有文件发送完成"); } catch (Exception e) { SendMessage(0, "发送错误:\n" + e.getMessage()); } } }
以上就是全部代码。
下载地址：点这里。
