Android: Add 'Open Pause Menu' hotkey

android/app/src/cpp/android_host_interface.cpp

@@ -45,6 +45,7 @@ static jmethodID s_EmulationActivity_method_onEmulationStopped;
 static jmethodID s_EmulationActivity_method_onGameTitleChanged;
 static jmethodID s_EmulationActivity_method_setVibration;
 static jmethodID s_EmulationActivity_method_getRefreshRate;
+static jmethodID s_EmulationActivity_method_openPauseMenu;
 static jclass s_PatchCode_class;
 static jmethodID s_PatchCode_constructor;
 static jclass s_GameListEntry_class;
@@ -224,6 +225,19 @@ std::unique_ptr<ByteStream> AndroidHostInterface::OpenPackageFile(const char* pa
   return ret;
 }
 
+void AndroidHostInterface::RegisterHotkeys()
+{
+    RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("OpenPauseMenu"),
+                   StaticString(TRANSLATABLE("Hotkeys", "Open Pause Menu")), [this](bool pressed) {
+                if (pressed) {
+                    AndroidHelpers::GetJNIEnv()->CallVoidMethod(m_emulation_activity_object,
+                                                                s_EmulationActivity_method_openPauseMenu);
+                }
+            });
+
+  CommonHostInterface::RegisterHotkeys();
+}
+
 bool AndroidHostInterface::GetMainDisplayRefreshRate(float* refresh_rate)
 {
   if (!m_emulation_activity_object)
@@ -898,6 +912,8 @@ extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
         nullptr ||
       (s_EmulationActivity_method_getRefreshRate =
          env->GetMethodID(emulation_activity_class, "getRefreshRate", "()F")) == nullptr ||
+      (s_EmulationActivity_method_openPauseMenu =
+                   env->GetMethodID(emulation_activity_class, "openPauseMenu", "()V")) == nullptr ||
       (s_PatchCode_constructor = env->GetMethodID(s_PatchCode_class, "<init>", "(ILjava/lang/String;Z)V")) == nullptr ||
       (s_GameListEntry_constructor = env->GetMethodID(
          s_GameListEntry_class, "<init>",

android/app/src/cpp/android_host_interface.h

@@ -72,6 +72,7 @@ protected:
   void SetUserDirectory() override;
   void LoadSettings() override;
   void UpdateInputMap() override;
+  void RegisterHotkeys() override;
 
   bool AcquireHostDisplay() override;
   void ReleaseHostDisplay() override;

android/app/src/main/java/com/github/stenzek/duckstation/EmulationActivity.java

@@ -154,6 +154,12 @@ public class EmulationActivity extends AppCompatActivity implements SurfaceHolde
         return display.getRefreshRate();
     }
 
+    public void openPauseMenu() {
+        runOnUiThread(() -> {
+            showMenu();
+        });
+    }
+
     private void doApplySettings() {
         AndroidHostInterface.getInstance().applySettings();
         updateRequestedOrientation();

src/frontend-common/common_host_interface.cpp

@@ -77,10 +77,7 @@ bool CommonHostInterface::Initialize()
 
   m_save_state_selector_ui = std::make_unique<FrontendCommon::SaveStateSelectorUI>(this);
 
-  RegisterGeneralHotkeys();
-  RegisterGraphicsHotkeys();
-  RegisterSaveStateHotkeys();
-  RegisterAudioHotkeys();
+  RegisterHotkeys();
 
   UpdateControllerInterface();
   return true;
@@ -1462,6 +1459,14 @@ bool CommonHostInterface::AddRumbleToInputMap(const std::string& binding, u32 co
   return false;
 }
 
+void CommonHostInterface::RegisterHotkeys()
+{
+  RegisterGeneralHotkeys();
+  RegisterGraphicsHotkeys();
+  RegisterSaveStateHotkeys();
+  RegisterAudioHotkeys();
+}
+
 void CommonHostInterface::RegisterGeneralHotkeys()
 {
   RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("FastForward"),

src/frontend-common/common_host_interface.h

@@ -225,6 +225,9 @@ protected:
   /// Request the frontend to exit.
   virtual void RequestExit() = 0;
 
+  /// Registers frontend-specific hotkeys.
+  virtual void RegisterHotkeys();
+
   /// Executes per-frame tasks such as controller polling.
   virtual void PollAndUpdate();