Implement link helper for android

android/src/main/java/SuperTuxKartActivity.java

@@ -4,7 +4,9 @@ import org.supertuxkart.stk_dbg.STKEditText;
 
 import android.app.NativeActivity;
 import android.content.Context;
+import android.content.Intent;
 import android.graphics.Rect;
+import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.text.Editable;
@@ -181,6 +183,14 @@ public class SuperTuxKartActivity extends NativeActivity
     }
     // ------------------------------------------------------------------------
     /* Called by STK in JNI. */
+    public void openURL(final String url)
+    {
+        Intent i = new Intent(Intent.ACTION_VIEW);
+        i.setData(Uri.parse(url));
+        startActivity(i);
+    }
+    // ------------------------------------------------------------------------
+    /* Called by STK in JNI. */
     public void fromSTKEditBox(final int widget_id, final String text,
                                final int selection_start,
                                final int selection_end, final int type)

lib/irrlicht/source/Irrlicht/CIrrDeviceAndroid.cpp

@@ -1151,6 +1151,64 @@ wchar_t CIrrDeviceAndroid::getKeyChar(SEvent& event)
     return key_char;
 }
 
+void CIrrDeviceAndroid::openURL(const std::string& url)
+{
+    if (!Android)
+        return;
+
+    bool was_detached = false;
+    JNIEnv* env = NULL;
+
+    jint status = Android->activity->vm->GetEnv((void**)&env, JNI_VERSION_1_6);
+    if (status == JNI_EDETACHED)
+    {
+        JavaVMAttachArgs args;
+        args.version = JNI_VERSION_1_6;
+        args.name = "NativeThread";
+        args.group = NULL;
+
+        status = Android->activity->vm->AttachCurrentThread(&env, &args);
+        was_detached = true;
+    }
+    if (status != JNI_OK)
+    {
+        os::Printer::log("Cannot attach current thread in openURL.", ELL_DEBUG);
+        return;
+    }
+
+    jobject native_activity = Android->activity->clazz;
+    jclass class_native_activity = env->GetObjectClass(native_activity);
+
+    if (class_native_activity == NULL)
+    {
+        os::Printer::log("openURL unable to find object class.", ELL_ERROR);
+        if (was_detached)
+        {
+            Android->activity->vm->DetachCurrentThread();
+        }
+        return;
+    }
+
+    jmethodID method_id = env->GetMethodID(class_native_activity, "openURL", "(Ljava/lang/String;)V");
+
+    if (method_id == NULL)
+    {
+        os::Printer::log("openURL unable to find method id.", ELL_ERROR);
+        if (was_detached)
+        {
+            Android->activity->vm->DetachCurrentThread();
+        }
+        return;
+    }
+    jstring url_jstring = env->NewStringUTF(url.c_str());
+    env->CallVoidMethod(native_activity, method_id, url_jstring);
+
+    if (was_detached)
+    {
+        Android->activity->vm->DetachCurrentThread();
+    }
+}
+
 void CIrrDeviceAndroid::toggleOnScreenKeyboard(bool show, s32 type)
 {
     if (!Android)

lib/irrlicht/source/Irrlicht/CIrrDeviceAndroid.h

@@ -18,7 +18,7 @@
 #include "IImagePresenter.h"
 
 #include <map>
-
+#include <string>
 
 namespace irr
 {
@@ -89,7 +89,7 @@ namespace irr
         static void onCreate();
         static const AndroidApplicationInfo& getApplicationInfo(
                                                     ANativeActivity* activity);
-
+        void openURL(const std::string& url);
     private:
         s32 m_moved_height;
         u32 m_screen_height;

src/online/link_helper.cpp

@@ -15,6 +15,7 @@
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include "online/link_helper.hpp"
+#include "graphics/irr_driver.hpp"
 #include "utils/log.hpp"
 #include <string>
 #ifdef _WIN32
@@ -22,13 +23,17 @@
 #include <shellapi.h>
 #endif
 
+#ifdef ANDROID
+#include "../../../lib/irrlicht/source/Irrlicht/CIrrDeviceAndroid.h"
+#endif
+
 using namespace Online;
 
 namespace Online
 {
     bool LinkHelper::isSupported()
     {
-#if defined(_WIN32) || defined(__APPLE__) || (defined(__linux__) && !defined(__ANDROID__))
+#if defined(_WIN32) || defined(__APPLE__) || (defined(__linux__))
         return true;
 #else
         return false;
@@ -37,7 +42,11 @@ namespace Online
 
     void LinkHelper::openURL (std::string url)
     {
-#if defined(_WIN32)
+#if defined(ANDROID)
+        CIrrDeviceAndroid* android = dynamic_cast<CIrrDeviceAndroid*>(irr_driver->getDevice());
+        if (android)
+            android->openURL(url);
+#elif defined(_WIN32)
         ShellExecuteA(NULL, "open", url.c_str(), NULL, NULL, SW_SHOWNORMAL);
 #elif defined(__APPLE__) && !defined(IOS_STK)
         std::string command = std::string("open ").append(url);
@@ -45,7 +54,7 @@ namespace Online
         {
             Log::error("OpenURL", "Command returned non-zero exit status");
         }
-#elif defined(__linux__) && !defined(__ANDROID__)
+#elif defined(__linux__)
         std::string command = std::string("xdg-open ").append(url);
         
         const char* lib_path = getenv("LD_LIBRARY_PATH");