Do not use device as a singleton

The device instance should be able to store a state (e.g. the maximum
size requested by the user), so it should not be a singleton.

server/src/com/genymobile/scrcpy/DesktopConnection.java

@@ -33,10 +33,15 @@ public class DesktopConnection implements Closeable {
         return localSocket;
     }
 
-    public static DesktopConnection open(String deviceName, int width, int height) throws IOException {
+    public static DesktopConnection open(Device device) throws IOException {
         LocalSocket socket = connect(SOCKET_NAME);
+
+        ScreenInfo initialScreenInfo = device.getScreenInfo();
+        int width = initialScreenInfo.getLogicalWidth();
+        int height = initialScreenInfo.getLogicalHeight();
+
         DesktopConnection connection = new DesktopConnection(socket);
-        connection.send(deviceName, width, height);
+        connection.send(Device.getDeviceName(), width, height);
         return connection;
     }
 

server/src/com/genymobile/scrcpy/Device.java

@@ -13,13 +13,12 @@ public class Device {
         void onRotationChanged(int rotation);
     }
 
-    private static final Device INSTANCE = new Device();
     private final ServiceManager serviceManager = new ServiceManager();
 
     private ScreenInfo screenInfo;
     private RotationListener rotationListener;
 
-    private Device() {
+    public Device() {
         screenInfo = readScreenInfo();
         registerRotationWatcher(new IRotationWatcher.Stub() {
             @Override
@@ -37,10 +36,6 @@ public class Device {
         });
     }
 
-    public static Device getInstance() {
-        return INSTANCE;
-    }
-
     public synchronized ScreenInfo getScreenInfo() {
         if (screenInfo == null) {
             screenInfo = readScreenInfo();

server/src/com/genymobile/scrcpy/EventController.java

@@ -13,6 +13,7 @@ import java.io.IOException;
 
 public class EventController {
 
+    private final Device device;
     private final InputManager inputManager;
     private final DesktopConnection connection;
 
@@ -22,9 +23,10 @@ public class EventController {
     private final MotionEvent.PointerProperties[] pointerProperties = { new MotionEvent.PointerProperties() };
     private final MotionEvent.PointerCoords[] pointerCoords = { new MotionEvent.PointerCoords() };
 
-    public EventController(DesktopConnection connection) {
+    public EventController(Device device, DesktopConnection connection) {
+        this.device = device;
         this.connection = connection;
-        inputManager = Device.getInstance().getInputManager();
+        inputManager = device.getInputManager();
         initPointer();
     }
 
@@ -102,7 +104,7 @@ public class EventController {
         if (action == MotionEvent.ACTION_DOWN) {
             lastMouseDown = now;
         }
-        Point point = Device.getInstance().getPhysicalPoint(position);
+        Point point = device.getPhysicalPoint(position);
         if (point == null) {
             // ignore event
             return false;
@@ -114,7 +116,7 @@ public class EventController {
 
     private boolean injectScroll(Position position, int hScroll, int vScroll) {
         long now = SystemClock.uptimeMillis();
-        Point point = Device.getInstance().getPhysicalPoint(position);
+        Point point = device.getPhysicalPoint(position);
         if (point == null) {
             // ignore event
             return false;

server/src/com/genymobile/scrcpy/ScrCpyServer.java

@@ -7,13 +7,10 @@ public class ScrCpyServer {
     private static final String TAG = "scrcpy";
 
     private static void scrcpy() throws IOException {
-        String deviceName = Device.getDeviceName();
-        ScreenInfo initialScreenInfo = Device.getInstance().getScreenInfo();
-        int width = initialScreenInfo.getLogicalWidth();
-        int height = initialScreenInfo.getLogicalHeight();
-        try (DesktopConnection connection = DesktopConnection.open(deviceName, width, height)) {
+        final Device device = new Device();
+        try (DesktopConnection connection = DesktopConnection.open(device)) {
             final ScreenStreamer streamer = new ScreenStreamer(connection);
-            Device.getInstance().setRotationListener(new Device.RotationListener() {
+            device.setRotationListener(new Device.RotationListener() {
                 @Override
                 public void onRotationChanged(int rotation) {
                     streamer.reset();
@@ -21,7 +18,7 @@ public class ScrCpyServer {
             });
 
             // asynchronous
-            startEventController(connection);
+            startEventController(device, connection);
 
             try {
                 // synchronous
@@ -32,12 +29,12 @@ public class ScrCpyServer {
         }
     }
 
-    private static void startEventController(final DesktopConnection connection) {
+    private static void startEventController(final Device device, final DesktopConnection connection) {
         new Thread(new Runnable() {
             @Override
             public void run() {
                 try {
-                    new EventController(connection).control();
+                    new EventController(device, connection).control();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }