android: Adjust log lifecycle

Now logging will start when the frontend starts like qt does. This also adjusts the share log button to follow where we share the current log if we just returned from a game or return the old log if we haven't started a game yet.

src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt

@@ -462,12 +462,12 @@ object NativeLibrary {
     }
 
     fun setEmulationActivity(emulationActivity: EmulationActivity?) {
-        Log.verbose("[NativeLibrary] Registering EmulationActivity.")
+        Log.debug("[NativeLibrary] Registering EmulationActivity.")
         sEmulationActivity = WeakReference(emulationActivity)
     }
 
     fun clearEmulationActivity() {
-        Log.verbose("[NativeLibrary] Unregistering EmulationActivity.")
+        Log.debug("[NativeLibrary] Unregistering EmulationActivity.")
         sEmulationActivity.clear()
     }
 

src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt

@@ -47,6 +47,7 @@ import org.yuzu.yuzu_emu.model.EmulationViewModel
 import org.yuzu.yuzu_emu.model.Game
 import org.yuzu.yuzu_emu.utils.ForegroundService
 import org.yuzu.yuzu_emu.utils.InputHandler
+import org.yuzu.yuzu_emu.utils.Log
 import org.yuzu.yuzu_emu.utils.MemoryUtil
 import org.yuzu.yuzu_emu.utils.NfcReader
 import org.yuzu.yuzu_emu.utils.ThemeHelper
@@ -80,6 +81,7 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        Log.gameLaunched = true
         ThemeHelper.setTheme(this)
 
         super.onCreate(savedInstanceState)

src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/HomeSettingsFragment.kt

@@ -42,6 +42,7 @@ import org.yuzu.yuzu_emu.model.HomeViewModel
 import org.yuzu.yuzu_emu.ui.main.MainActivity
 import org.yuzu.yuzu_emu.utils.FileUtil
 import org.yuzu.yuzu_emu.utils.GpuDriverHelper
+import org.yuzu.yuzu_emu.utils.Log
 
 class HomeSettingsFragment : Fragment() {
     private var _binding: FragmentHomeSettingsBinding? = null
@@ -312,19 +313,32 @@ class HomeSettingsFragment : Fragment() {
         }
     }
 
+    // Share the current log if we just returned from a game but share the old log
+    // if we just started the app and the old log exists.
     private fun shareLog() {
-        val file = DocumentFile.fromSingleUri(
+        val currentLog = DocumentFile.fromSingleUri(
             mainActivity,
             DocumentsContract.buildDocumentUri(
                 DocumentProvider.AUTHORITY,
                 "${DocumentProvider.ROOT_ID}/log/yuzu_log.txt"
             )
         )!!
-        if (file.exists()) {
-            val intent = Intent(Intent.ACTION_SEND)
-                .setDataAndType(file.uri, FileUtil.TEXT_PLAIN)
-                .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
-                .putExtra(Intent.EXTRA_STREAM, file.uri)
+        val oldLog = DocumentFile.fromSingleUri(
+            mainActivity,
+            DocumentsContract.buildDocumentUri(
+                DocumentProvider.AUTHORITY,
+                "${DocumentProvider.ROOT_ID}/log/yuzu_log.txt.old.txt"
+            )
+        )!!
+
+        val intent = Intent(Intent.ACTION_SEND)
+            .setDataAndType(currentLog.uri, FileUtil.TEXT_PLAIN)
+            .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+        if (!Log.gameLaunched && oldLog.exists()) {
+            intent.putExtra(Intent.EXTRA_STREAM, oldLog.uri)
+            startActivity(Intent.createChooser(intent, getText(R.string.share_log)))
+        } else if (currentLog.exists()) {
+            intent.putExtra(Intent.EXTRA_STREAM, currentLog.uri)
             startActivity(Intent.createChooser(intent, getText(R.string.share_log)))
         } else {
             Toast.makeText(

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/Log.kt

@@ -3,38 +3,17 @@
 
 package org.yuzu.yuzu_emu.utils
 
-import android.util.Log
-import org.yuzu.yuzu_emu.BuildConfig
-
-/**
- * Contains methods that call through to [android.util.Log], but
- * with the same TAG automatically provided. Also no-ops VERBOSE and DEBUG log
- * levels in release builds.
- */
 object Log {
-    private const val TAG = "Yuzu Frontend"
+    // Tracks whether we should share the old log or the current log
+    var gameLaunched = false
 
-    fun verbose(message: String) {
-        if (BuildConfig.DEBUG) {
-            Log.v(TAG, message)
-        }
-    }
+    external fun debug(message: String)
 
-    fun debug(message: String) {
-        if (BuildConfig.DEBUG) {
-            Log.d(TAG, message)
-        }
-    }
+    external fun warning(message: String)
 
-    fun info(message: String) {
-        Log.i(TAG, message)
-    }
+    external fun info(message: String)
 
-    fun warning(message: String) {
-        Log.w(TAG, message)
-    }
+    external fun error(message: String)
 
-    fun error(message: String) {
-        Log.e(TAG, message)
-    }
+    external fun critical(message: String)
 }

src/android/app/src/main/jni/CMakeLists.txt

@@ -18,6 +18,7 @@ add_library(yuzu-android SHARED
     native_config.cpp
     uisettings.cpp
     game_metadata.cpp
+    native_log.cpp
 )
 
 set_property(TARGET yuzu-android PROPERTY IMPORTED_LOCATION ${FFmpeg_LIBRARY_DIR})

src/android/app/src/main/jni/native.cpp

@@ -248,6 +248,11 @@ void EmulationSession::ConfigureFilesystemProvider(const std::string& filepath)
 }
 
 void EmulationSession::InitializeSystem() {
+    // Initialize logging system
+    Common::Log::Initialize();
+    Common::Log::SetColorConsoleBackendEnabled(true);
+    Common::Log::Start();
+
     // Initialize filesystem.
     m_system.SetFilesystem(m_vfs);
     m_system.GetUserChannel().clear();
@@ -462,10 +467,6 @@ void EmulationSession::OnEmulationStopped(Core::SystemResultStatus result) {
 }
 
 static Core::SystemResultStatus RunEmulation(const std::string& filepath) {
-    Common::Log::Initialize();
-    Common::Log::SetColorConsoleBackendEnabled(true);
-    Common::Log::Start();
-
     MicroProfileOnThreadCreate("EmuThread");
     SCOPE_EXIT({ MicroProfileShutdown(); });
 

src/android/app/src/main/jni/native_log.cpp

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <common/logging/log.h>
+#include <jni.h>
+
+#include "android_common/android_common.h"
+
+extern "C" {
+
+void Java_org_yuzu_yuzu_1emu_utils_Log_debug(JNIEnv* env, jobject obj, jstring jmessage) {
+    LOG_DEBUG(Frontend, "{}", GetJString(env, jmessage));
+}
+
+void Java_org_yuzu_yuzu_1emu_utils_Log_warning(JNIEnv* env, jobject obj, jstring jmessage) {
+    LOG_WARNING(Frontend, "{}", GetJString(env, jmessage));
+}
+
+void Java_org_yuzu_yuzu_1emu_utils_Log_info(JNIEnv* env, jobject obj, jstring jmessage) {
+    LOG_INFO(Frontend, "{}", GetJString(env, jmessage));
+}
+
+void Java_org_yuzu_yuzu_1emu_utils_Log_error(JNIEnv* env, jobject obj, jstring jmessage) {
+    LOG_ERROR(Frontend, "{}", GetJString(env, jmessage));
+}
+
+void Java_org_yuzu_yuzu_1emu_utils_Log_critical(JNIEnv* env, jobject obj, jstring jmessage) {
+    LOG_CRITICAL(Frontend, "{}", GetJString(env, jmessage));
+}
+
+} // extern "C"