Android: fix GUI not loading on Qt 5.15

src/Makefile.qt.include

@@ -394,8 +394,7 @@ bitcoin_qt_apk: FORCE
 	cp $(dir $(lastword $(CC)))../sysroot/usr/lib/$(host_alias)/libc++_shared.so $(APK_LIB_DIR)
 	tar xf $(QT_BASE_PATH) -C qt/android/src/ $(QT_BASE_TLD)src/android/jar/src --strip-components=5
 	tar xf $(QT_BASE_PATH) -C qt/android/src/ $(QT_BASE_TLD)src/android/java/src --strip-components=5
-	tar xf $(QT_BASE_PATH) -C qt/android/res/ $(QT_BASE_TLD)src/android/java/res --strip-components=5
-	cp qt/bitcoin-qt $(APK_LIB_DIR)/libbitcoin-qt.so
+	cp qt/bitcoin-qt $(APK_LIB_DIR)/libbitcoin-qt_$(ANDROID_ARCH).so
 	cd qt/android && gradle wrapper --gradle-version=6.6.1
 	cd qt/android && ./gradlew build
 

src/Makefile.qttest.include

@@ -52,7 +52,7 @@ if ENABLE_ZMQ
 qt_test_test_bitcoin_qt_LDADD += $(LIBBITCOIN_ZMQ) $(ZMQ_LIBS)
 endif
 qt_test_test_bitcoin_qt_LDADD += $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_UTIL) $(LIBBITCOIN_CONSENSUS) $(LIBBITCOIN_CRYPTO) $(LIBUNIVALUE) $(LIBLEVELDB) \
-  $(LIBLEVELDB_SSE42) $(LIBMEMENV) $(BOOST_LIBS) $(QT_DBUS_LIBS) $(QT_TEST_LIBS) $(QT_LIBS) \
+  $(LIBLEVELDB_SSE42) $(LIBMEMENV) $(BOOST_LIBS) $(QT_LIBS) $(QT_DBUS_LIBS) $(QT_TEST_LIBS) \
   $(QR_LIBS) $(BDB_LIBS) $(MINIUPNPC_LIBS) $(NATPMP_LIBS) $(LIBSECP256K1) \
   $(EVENT_PTHREADS_LIBS) $(EVENT_LIBS) $(SQLITE_LIBS)
 qt_test_test_bitcoin_qt_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(QT_LDFLAGS) $(LIBTOOL_APP_LDFLAGS) $(PTHREAD_FLAGS)

src/qt/android/.gitignore

@@ -1,9 +1,7 @@
 /.gradle
 /build
-/gradle/wrapper
+/gradle
 /gradlew*
 /libs
-/res/layout
-/res/values*
 /src/org/kde
 /src/org/qtproject

src/qt/android/AndroidManifest.xml

@@ -32,7 +32,9 @@
             <meta-data android:name="android.app.background_running" android:value="true"/>
             <meta-data android:name="android.app.auto_screen_scale_factor" android:value="true"/>
             <meta-data android:name="android.app.extract_android_style" android:value="default"/>
-    </activity>
+
+            <meta-data android:name="android.app.load_local_libs_resource_id" android:resource="@array/load_local_libs"/>
+        </activity>
 
     </application>
 </manifest>

src/qt/android/res/values/libs.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <array name="load_local_libs">
+        <item>
+            arm64-v8a;libbitcoin-qt_arm64-v8a.so
+        </item>
+        <item>
+            armeabi-v7a;libbitcoin-qt_armeabi-v7a.so
+        </item>
+        <item>
+            x86_64;libbitcoin-qt_x86_64.so
+        </item>
+        <item>
+            x86;libbitcoin-qt_x86.so
+        </item>
+    </array>
+</resources>

src/qt/bitcoin.cpp

@@ -65,6 +65,8 @@ Q_IMPORT_PLUGIN(QWindowsVistaStylePlugin);
 #elif defined(QT_QPA_PLATFORM_COCOA)
 Q_IMPORT_PLUGIN(QCocoaIntegrationPlugin);
 Q_IMPORT_PLUGIN(QMacStylePlugin);
+#elif defined(QT_QPA_PLATFORM_ANDROID)
+Q_IMPORT_PLUGIN(QAndroidPlatformIntegrationPlugin);
 #endif
 #endif