minetest/src/porting_android.cpp

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/*
Minetest
Copyright (C) 2014 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __ANDROID__
#error This file may only be compiled for android!
#endif
#include "util/numeric.h"
#include "porting.h"
#include "porting_android.h"
#include "threading/thread.h"
#include "config.h"
#include "filesys.h"
#include "log.h"
#include <sstream>
#include <exception>
#include <cstdlib>
#ifdef GPROF
#include "prof.h"
#endif
extern int main(int argc, char *argv[]);
void android_main(android_app *app)
{
int retval = 0;
porting::app_global = app;
Thread::setName("Main");
try {
char *argv[] = {strdup(PROJECT_NAME), nullptr};
main(ARRLEN(argv) - 1, argv);
free(argv[0]);
} catch (std::exception &e) {
errorstream << "Uncaught exception in main thread: " << e.what() << std::endl;
retval = -1;
} catch (...) {
errorstream << "Uncaught exception in main thread!" << std::endl;
retval = -1;
}
porting::cleanupAndroid();
infostream << "Shutting down." << std::endl;
exit(retval);
}
/**
* Handler for finished message box input
* Intentionally NOT in namespace porting
* ToDo: this doesn't work as expected, there's a workaround for it right now
*/
extern "C" {
JNIEXPORT void JNICALL Java_net_minetest_minetest_GameActivity_putMessageBoxResult(
JNIEnv *env, jclass thiz, jstring text)
{
errorstream <<
"Java_net_minetest_minetest_GameActivity_putMessageBoxResult got: " <<
std::string((const char*) env->GetStringChars(text, nullptr)) << std::endl;
}
}
namespace porting {
android_app *app_global;
JNIEnv *jnienv;
jclass nativeActivity;
jclass findClass(const std::string &classname)
{
if (jnienv == nullptr)
return nullptr;
jclass nativeactivity = jnienv->FindClass("android/app/NativeActivity");
jmethodID getClassLoader = jnienv->GetMethodID(
nativeactivity, "getClassLoader", "()Ljava/lang/ClassLoader;");
jobject cls = jnienv->CallObjectMethod(
app_global->activity->clazz, getClassLoader);
jclass classLoader = jnienv->FindClass("java/lang/ClassLoader");
jmethodID findClass = jnienv->GetMethodID(classLoader, "loadClass",
"(Ljava/lang/String;)Ljava/lang/Class;");
jstring strClassName = jnienv->NewStringUTF(classname.c_str());
return (jclass) jnienv->CallObjectMethod(cls, findClass, strClassName);
}
void initAndroid()
{
porting::jnienv = nullptr;
JavaVM *jvm = app_global->activity->vm;
JavaVMAttachArgs lJavaVMAttachArgs;
lJavaVMAttachArgs.version = JNI_VERSION_1_6;
lJavaVMAttachArgs.name = PROJECT_NAME_C "NativeThread";
lJavaVMAttachArgs.group = nullptr;
if (jvm->AttachCurrentThread(&porting::jnienv, &lJavaVMAttachArgs) == JNI_ERR) {
errorstream << "Failed to attach native thread to jvm" << std::endl;
exit(-1);
}
nativeActivity = findClass("net/minetest/minetest/GameActivity");
if (nativeActivity == nullptr)
errorstream <<
"porting::initAndroid unable to find java native activity class" <<
std::endl;
#ifdef GPROF
// in the start-up code
__android_log_print(ANDROID_LOG_ERROR, PROJECT_NAME_C,
"Initializing GPROF profiler");
monstartup("libMinetest.so");
#endif
}
void cleanupAndroid()
{
#ifdef GPROF
errorstream << "Shutting down GPROF profiler" << std::endl;
setenv("CPUPROFILE", (path_user + DIR_DELIM + "gmon.out").c_str(), 1);
moncleanup();
#endif
JavaVM *jvm = app_global->activity->vm;
jvm->DetachCurrentThread();
}
static std::string javaStringToUTF8(jstring js)
{
std::string str;
// Get string as a UTF-8 c-string
const char *c_str = jnienv->GetStringUTFChars(js, nullptr);
// Save it
str = c_str;
// And free the c-string
jnienv->ReleaseStringUTFChars(js, c_str);
return str;
}
// Calls static method if obj is NULL
static std::string getAndroidPath(
jclass cls, jobject obj, jmethodID mt_getAbsPath, const char *getter)
{
// Get getter method
jmethodID mt_getter;
if (obj)
mt_getter = jnienv->GetMethodID(cls, getter, "()Ljava/io/File;");
else
mt_getter = jnienv->GetStaticMethodID(cls, getter, "()Ljava/io/File;");
// Call getter
jobject ob_file;
if (obj)
ob_file = jnienv->CallObjectMethod(obj, mt_getter);
else
ob_file = jnienv->CallStaticObjectMethod(cls, mt_getter);
// Call getAbsolutePath
auto js_path = (jstring) jnienv->CallObjectMethod(ob_file, mt_getAbsPath);
return javaStringToUTF8(js_path);
}
void initializePathsAndroid()
{
// Get Environment class
jclass cls_Env = jnienv->FindClass("android/os/Environment");
// Get File class
jclass cls_File = jnienv->FindClass("java/io/File");
// Get getAbsolutePath method
jmethodID mt_getAbsPath = jnienv->GetMethodID(cls_File,
"getAbsolutePath", "()Ljava/lang/String;");
std::string path_storage = getAndroidPath(cls_Env, nullptr,
mt_getAbsPath, "getExternalStorageDirectory");
path_user = path_storage + DIR_DELIM + PROJECT_NAME_C;
path_share = path_storage + DIR_DELIM + PROJECT_NAME_C;
path_cache = getAndroidPath(nativeActivity,
app_global->activity->clazz, mt_getAbsPath, "getCacheDir");
migrateCachePath();
}
void showInputDialog(const std::string &acceptButton, const std::string &hint,
const std::string &current, int editType)
{
jmethodID showdialog = jnienv->GetMethodID(nativeActivity, "showDialog",
"(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V");
FATAL_ERROR_IF(showdialog == nullptr,
"porting::showInputDialog unable to find java show dialog method");
jstring jacceptButton = jnienv->NewStringUTF(acceptButton.c_str());
jstring jhint = jnienv->NewStringUTF(hint.c_str());
jstring jcurrent = jnienv->NewStringUTF(current.c_str());
jint jeditType = editType;
jnienv->CallVoidMethod(app_global->activity->clazz, showdialog,
jacceptButton, jhint, jcurrent, jeditType);
}
void openURIAndroid(const std::string &url)
{
jmethodID url_open = jnienv->GetMethodID(nativeActivity, "openURI",
"(Ljava/lang/String;)V");
FATAL_ERROR_IF(url_open == nullptr,
"porting::openURIAndroid unable to find java openURI method");
jstring jurl = jnienv->NewStringUTF(url.c_str());
jnienv->CallVoidMethod(app_global->activity->clazz, url_open, jurl);
}
int getInputDialogState()
{
jmethodID dialogstate = jnienv->GetMethodID(nativeActivity,
"getDialogState", "()I");
FATAL_ERROR_IF(dialogstate == nullptr,
"porting::getInputDialogState unable to find java dialog state method");
return jnienv->CallIntMethod(app_global->activity->clazz, dialogstate);
}
std::string getInputDialogValue()
{
jmethodID dialogvalue = jnienv->GetMethodID(nativeActivity,
"getDialogValue", "()Ljava/lang/String;");
FATAL_ERROR_IF(dialogvalue == nullptr,
"porting::getInputDialogValue unable to find java dialog value method");
jobject result = jnienv->CallObjectMethod(app_global->activity->clazz,
dialogvalue);
const char *javachars = jnienv->GetStringUTFChars((jstring) result, nullptr);
std::string text(javachars);
jnienv->ReleaseStringUTFChars((jstring) result, javachars);
return text;
}
#ifndef SERVER
float getDisplayDensity()
{
static bool firstrun = true;
static float value = 0;
if (firstrun) {
jmethodID getDensity = jnienv->GetMethodID(nativeActivity,
"getDensity", "()F");
FATAL_ERROR_IF(getDensity == nullptr,
"porting::getDisplayDensity unable to find java getDensity method");
value = jnienv->CallFloatMethod(app_global->activity->clazz, getDensity);
firstrun = false;
}
return value;
}
v2u32 getDisplaySize()
{
static bool firstrun = true;
static v2u32 retval;
if (firstrun) {
jmethodID getDisplayWidth = jnienv->GetMethodID(nativeActivity,
"getDisplayWidth", "()I");
FATAL_ERROR_IF(getDisplayWidth == nullptr,
"porting::getDisplayWidth unable to find java getDisplayWidth method");
retval.X = jnienv->CallIntMethod(app_global->activity->clazz,
getDisplayWidth);
jmethodID getDisplayHeight = jnienv->GetMethodID(nativeActivity,
"getDisplayHeight", "()I");
FATAL_ERROR_IF(getDisplayHeight == nullptr,
"porting::getDisplayHeight unable to find java getDisplayHeight method");
retval.Y = jnienv->CallIntMethod(app_global->activity->clazz,
getDisplayHeight);
firstrun = false;
}
return retval;
}
#endif // ndef SERVER
}