src/porting_android.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2014 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #ifndef __ANDROID__
  21 #error This file may only be compiled for android!
  22 #endif
  23
  24 #include "util/numeric.h"
  25 #include "porting.h"
  26 #include "porting_android.h"
  27 #include "threading/thread.h"
  28 #include "config.h"
  29 #include "filesys.h"
  30 #include "log.h"
  31
  32 #include <sstream>
  33 #include <exception>
  34 #include <cstdlib>
  35
  36 #ifdef GPROF
  37 #include "prof.h"
  38 #endif
  39
  40 extern int main(int argc, char *argv[]);
  41
  42 void android_main(android_app *app)
  43 {
  44         int retval = 0;
  45         porting::app_global = app;
  46
  47         Thread::setName("Main");
  48
  49         try {
  50                 char *argv[] = {strdup(PROJECT_NAME), nullptr};
  51                 main(ARRLEN(argv) - 1, argv);
  52                 free(argv[0]);
  53         } catch (std::exception &e) {
  54                 errorstream << "Uncaught exception in main thread: " << e.what() << std::endl;
  55                 retval = -1;
  56         } catch (...) {
  57                 errorstream << "Uncaught exception in main thread!" << std::endl;
  58                 retval = -1;
  59         }
  60
  61         porting::cleanupAndroid();
  62         infostream << "Shutting down." << std::endl;
  63         exit(retval);
  64 }
  65
  66 /**
  67  * Handler for finished message box input
  68  * Intentionally NOT in namespace porting
  69  * ToDo: this doesn't work as expected, there's a workaround for it right now
  70  */
  71 extern "C" {
  72         JNIEXPORT void JNICALL Java_net_minetest_minetest_GameActivity_putMessageBoxResult(
  73                         JNIEnv *env, jclass thiz, jstring text)
  74         {
  75                 errorstream <<
  76                         "Java_net_minetest_minetest_GameActivity_putMessageBoxResult got: " <<
  77                         std::string((const char*) env->GetStringChars(text, nullptr)) << std::endl;
  78         }
  79 }
  80
  81 namespace porting {
  82 android_app *app_global;
  83 JNIEnv      *jnienv;
  84 jclass       nativeActivity;
  85
  86 jclass findClass(const std::string &classname)
  87 {
  88         if (jnienv == nullptr)
  89                 return nullptr;
  90
  91         jclass nativeactivity = jnienv->FindClass("android/app/NativeActivity");
  92         jmethodID getClassLoader = jnienv->GetMethodID(
  93                         nativeactivity, "getClassLoader", "()Ljava/lang/ClassLoader;");
  94         jobject cls = jnienv->CallObjectMethod(
  95                                                 app_global->activity->clazz, getClassLoader);
  96         jclass classLoader = jnienv->FindClass("java/lang/ClassLoader");
  97         jmethodID findClass = jnienv->GetMethodID(classLoader, "loadClass",
  98                                         "(Ljava/lang/String;)Ljava/lang/Class;");
  99         jstring strClassName = jnienv->NewStringUTF(classname.c_str());
 100         return (jclass) jnienv->CallObjectMethod(cls, findClass, strClassName);
 101 }
 102
 103 void initAndroid()
 104 {
 105         porting::jnienv = nullptr;
 106         JavaVM *jvm = app_global->activity->vm;
 107         JavaVMAttachArgs lJavaVMAttachArgs;
 108         lJavaVMAttachArgs.version = JNI_VERSION_1_6;
 109         lJavaVMAttachArgs.name = PROJECT_NAME_C "NativeThread";
 110         lJavaVMAttachArgs.group = nullptr;
 111
 112         if (jvm->AttachCurrentThread(&porting::jnienv, &lJavaVMAttachArgs) == JNI_ERR) {
 113                 errorstream << "Failed to attach native thread to jvm" << std::endl;
 114                 exit(-1);
 115         }
 116
 117         nativeActivity = findClass("net/minetest/minetest/GameActivity");
 118         if (nativeActivity == nullptr)
 119                 errorstream <<
 120                         "porting::initAndroid unable to find java native activity class" <<
 121                         std::endl;
 122
 123 #ifdef GPROF
 124         // in the start-up code
 125         __android_log_print(ANDROID_LOG_ERROR, PROJECT_NAME_C,
 126                         "Initializing GPROF profiler");
 127         monstartup("libMinetest.so");
 128 #endif
 129 }
 130
 131 void cleanupAndroid()
 132 {
 133 #ifdef GPROF
 134         errorstream << "Shutting down GPROF profiler" << std::endl;
 135         setenv("CPUPROFILE", (path_user + DIR_DELIM + "gmon.out").c_str(), 1);
 136         moncleanup();
 137 #endif
 138
 139         JavaVM *jvm = app_global->activity->vm;
 140         jvm->DetachCurrentThread();
 141 }
 142
 143 static std::string javaStringToUTF8(jstring js)
 144 {
 145         std::string str;
 146         // Get string as a UTF-8 c-string
 147         const char *c_str = jnienv->GetStringUTFChars(js, nullptr);
 148         // Save it
 149         str = c_str;
 150         // And free the c-string
 151         jnienv->ReleaseStringUTFChars(js, c_str);
 152         return str;
 153 }
 154
 155 // Calls static method if obj is NULL
 156 static std::string getAndroidPath(
 157                 jclass cls, jobject obj, jmethodID mt_getAbsPath, const char *getter)
 158 {
 159         // Get getter method
 160         jmethodID mt_getter;
 161         if (obj)
 162                 mt_getter = jnienv->GetMethodID(cls, getter, "()Ljava/io/File;");
 163         else
 164                 mt_getter = jnienv->GetStaticMethodID(cls, getter, "()Ljava/io/File;");
 165
 166         // Call getter
 167         jobject ob_file;
 168         if (obj)
 169                 ob_file = jnienv->CallObjectMethod(obj, mt_getter);
 170         else
 171                 ob_file = jnienv->CallStaticObjectMethod(cls, mt_getter);
 172
 173         // Call getAbsolutePath
 174         auto js_path = (jstring) jnienv->CallObjectMethod(ob_file, mt_getAbsPath);
 175
 176         return javaStringToUTF8(js_path);
 177 }
 178
 179 void initializePathsAndroid()
 180 {
 181         // Get Environment class
 182         jclass cls_Env = jnienv->FindClass("android/os/Environment");
 183         // Get File class
 184         jclass cls_File = jnienv->FindClass("java/io/File");
 185         // Get getAbsolutePath method
 186         jmethodID mt_getAbsPath = jnienv->GetMethodID(cls_File,
 187                                 "getAbsolutePath", "()Ljava/lang/String;");
 188         std::string path_storage = getAndroidPath(cls_Env, nullptr,
 189                                 mt_getAbsPath, "getExternalStorageDirectory");
 190
 191         path_user    = path_storage + DIR_DELIM + PROJECT_NAME_C;
 192         path_share   = path_storage + DIR_DELIM + PROJECT_NAME_C;
 193         path_cache   = getAndroidPath(nativeActivity,
 194                         app_global->activity->clazz, mt_getAbsPath, "getCacheDir");
 195         migrateCachePath();
 196 }
 197
 198 void showInputDialog(const std::string &acceptButton, const std::string &hint,
 199                 const std::string &current, int editType)
 200 {
 201         jmethodID showdialog = jnienv->GetMethodID(nativeActivity, "showDialog",
 202                 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V");
 203
 204         FATAL_ERROR_IF(showdialog == nullptr,
 205                 "porting::showInputDialog unable to find java show dialog method");
 206
 207         jstring jacceptButton = jnienv->NewStringUTF(acceptButton.c_str());
 208         jstring jhint         = jnienv->NewStringUTF(hint.c_str());
 209         jstring jcurrent      = jnienv->NewStringUTF(current.c_str());
 210         jint    jeditType     = editType;
 211
 212         jnienv->CallVoidMethod(app_global->activity->clazz, showdialog,
 213                         jacceptButton, jhint, jcurrent, jeditType);
 214 }
 215
 216 void openURLAndroid(const std::string &url)
 217 {
 218         jmethodID url_open = jnienv->GetMethodID(nativeActivity, "openURL",
 219                 "(Ljava/lang/String;)V");
 220
 221         FATAL_ERROR_IF(url_open == nullptr,
 222                 "porting::openURLAndroid unable to find java openURL method");
 223
 224         jstring jurl = jnienv->NewStringUTF(url.c_str());
 225         jnienv->CallVoidMethod(app_global->activity->clazz, url_open, jurl);
 226 }
 227
 228 int getInputDialogState()
 229 {
 230         jmethodID dialogstate = jnienv->GetMethodID(nativeActivity,
 231                         "getDialogState", "()I");
 232
 233         FATAL_ERROR_IF(dialogstate == nullptr,
 234                 "porting::getInputDialogState unable to find java dialog state method");
 235
 236         return jnienv->CallIntMethod(app_global->activity->clazz, dialogstate);
 237 }
 238
 239 std::string getInputDialogValue()
 240 {
 241         jmethodID dialogvalue = jnienv->GetMethodID(nativeActivity,
 242                         "getDialogValue", "()Ljava/lang/String;");
 243
 244         FATAL_ERROR_IF(dialogvalue == nullptr,
 245                 "porting::getInputDialogValue unable to find java dialog value method");
 246
 247         jobject result = jnienv->CallObjectMethod(app_global->activity->clazz,
 248                         dialogvalue);
 249
 250         const char *javachars = jnienv->GetStringUTFChars((jstring) result, nullptr);
 251         std::string text(javachars);
 252         jnienv->ReleaseStringUTFChars((jstring) result, javachars);
 253
 254         return text;
 255 }
 256
 257 #ifndef SERVER
 258 float getDisplayDensity()
 259 {
 260         static bool firstrun = true;
 261         static float value = 0;
 262
 263         if (firstrun) {
 264                 jmethodID getDensity = jnienv->GetMethodID(nativeActivity,
 265                                 "getDensity", "()F");
 266
 267                 FATAL_ERROR_IF(getDensity == nullptr,
 268                         "porting::getDisplayDensity unable to find java getDensity method");
 269
 270                 value = jnienv->CallFloatMethod(app_global->activity->clazz, getDensity);
 271                 firstrun = false;
 272         }
 273         return value;
 274 }
 275
 276 v2u32 getDisplaySize()
 277 {
 278         static bool firstrun = true;
 279         static v2u32 retval;
 280
 281         if (firstrun) {
 282                 jmethodID getDisplayWidth = jnienv->GetMethodID(nativeActivity,
 283                                 "getDisplayWidth", "()I");
 284
 285                 FATAL_ERROR_IF(getDisplayWidth == nullptr,
 286                         "porting::getDisplayWidth unable to find java getDisplayWidth method");
 287
 288                 retval.X = jnienv->CallIntMethod(app_global->activity->clazz,
 289                                 getDisplayWidth);
 290
 291                 jmethodID getDisplayHeight = jnienv->GetMethodID(nativeActivity,
 292                                 "getDisplayHeight", "()I");
 293
 294                 FATAL_ERROR_IF(getDisplayHeight == nullptr,
 295                         "porting::getDisplayHeight unable to find java getDisplayHeight method");
 296
 297                 retval.Y = jnienv->CallIntMethod(app_global->activity->clazz,
 298                                 getDisplayHeight);
 299
 300                 firstrun = false;
 301         }
 302         return retval;
 303 }
 304 #endif // ndef SERVER
 305 }