Do not crash on missing clipboard manager

Some devices have no clipboard manager.

In that case, do not try to enable clipboard synchronization to avoid
a crash.

Fixes #1440 <https://github.com/Genymobile/scrcpy/issues/1440>
Fixes #1556 <https://github.com/Genymobile/scrcpy/issues/1556>

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

@@ -1,5 +1,6 @@
 package com.genymobile.scrcpy;
 
+import com.genymobile.scrcpy.wrappers.ClipboardManager;
 import com.genymobile.scrcpy.wrappers.ContentProvider;
 import com.genymobile.scrcpy.wrappers.InputManager;
 import com.genymobile.scrcpy.wrappers.ServiceManager;
@@ -80,23 +81,28 @@ public final class Device {
 
         if (options.getControl()) {
             // If control is enabled, synchronize Android clipboard to the computer automatically
-            serviceManager.getClipboardManager().addPrimaryClipChangedListener(new IOnPrimaryClipChangedListener.Stub() {
-                @Override
-                public void dispatchPrimaryClipChanged() {
-                    if (isSettingClipboard.get()) {
-                        // This is a notification for the change we are currently applying, ignore it
-                        return;
-                    }
-                    synchronized (Device.this) {
-                        if (clipboardListener != null) {
-                            String text = getClipboardText();
-                            if (text != null) {
-                                clipboardListener.onClipboardTextChanged(text);
+            ClipboardManager clipboardManager = serviceManager.getClipboardManager();
+            if (clipboardManager != null) {
+                clipboardManager.addPrimaryClipChangedListener(new IOnPrimaryClipChangedListener.Stub() {
+                    @Override
+                    public void dispatchPrimaryClipChanged() {
+                        if (isSettingClipboard.get()) {
+                            // This is a notification for the change we are currently applying, ignore it
+                            return;
+                        }
+                        synchronized (Device.this) {
+                            if (clipboardListener != null) {
+                                String text = getClipboardText();
+                                if (text != null) {
+                                    clipboardListener.onClipboardTextChanged(text);
+                                }
                             }
                         }
                     }
-                }
-            });
+                });
+            } else {
+                Ln.w("No clipboard manager, copy-paste between device and computer will not work");
+            }
         }
 
         if ((displayInfoFlags & DisplayInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS) == 0) {
@@ -199,7 +205,11 @@ public final class Device {
     }
 
     public String getClipboardText() {
-        CharSequence s = serviceManager.getClipboardManager().getText();
+        ClipboardManager clipboardManager = serviceManager.getClipboardManager();
+        if (clipboardManager == null) {
+            return null;
+        }
+        CharSequence s = clipboardManager.getText();
         if (s == null) {
             return null;
         }
@@ -207,8 +217,12 @@ public final class Device {
     }
 
     public boolean setClipboardText(String text) {
+        ClipboardManager clipboardManager = serviceManager.getClipboardManager();
+        if (clipboardManager == null) {
+            return false;
+        }
         isSettingClipboard.set(true);
-        boolean ok = serviceManager.getClipboardManager().setText(text);
+        boolean ok = clipboardManager.setText(text);
         isSettingClipboard.set(false);
         return ok;
     }

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -77,7 +77,14 @@ public final class ServiceManager {
 
     public ClipboardManager getClipboardManager() {
         if (clipboardManager == null) {
-            clipboardManager = new ClipboardManager(getService("clipboard", "android.content.IClipboard"));
+            IInterface clipboard = getService("clipboard", "android.content.IClipboard");
+            if (clipboard == null) {
+                // Some devices have no clipboard manager
+                // <https://github.com/Genymobile/scrcpy/issues/1440>
+                // <https://github.com/Genymobile/scrcpy/issues/1556>
+                return null;
+            }
+            clipboardManager = new ClipboardManager(clipboard);
         }
         return clipboardManager;
     }