mirror of
https://github.com/minetest/irrlicht.git
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185 lines
7.9 KiB
C++
185 lines
7.9 KiB
C++
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "android_tools.h"
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#include <android/log.h> // for the occasional debugging, style: __android_log_print(ANDROID_LOG_VERBOSE, "Irrlicht", "%s\n", "We do log");
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namespace irr
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{
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namespace android
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{
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// Not all DisplayMetrics are available through the NDK.
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// So we access the Java classes with the JNI interface.
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// You can access other Java classes available in Android in similar ways.
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// Function based roughly on the code from here: http://stackoverflow.com/questions/13249164/android-using-jni-from-nativeactivity
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bool getDisplayMetrics(android_app* app, SDisplayMetrics & metrics)
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{
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if (!app || !app->activity || !app->activity->vm )
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return false;
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JNIEnv* jni = 0;
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app->activity->vm->AttachCurrentThread(&jni, NULL);
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if (!jni )
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return false;
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// get all the classes we want to access from the JVM
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jclass classNativeActivity = jni->FindClass("android/app/NativeActivity");
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jclass classWindowManager = jni->FindClass("android/view/WindowManager");
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jclass classDisplay = jni->FindClass("android/view/Display");
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jclass classDisplayMetrics = jni->FindClass("android/util/DisplayMetrics");
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if (!classNativeActivity || !classWindowManager || !classDisplay || !classDisplayMetrics)
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{
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app->activity->vm->DetachCurrentThread();
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return false;
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}
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// Get all the methods we want to access from the JVM classes
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// Note: You can get the signatures (third parameter of GetMethodID) for all
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// functions of a class with the javap tool, like in the following example for class DisplayMetrics:
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// javap -s -classpath myandroidpath/adt-bundle-linux-x86_64-20131030/sdk/platforms/android-10/android.jar android/util/DisplayMetrics
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jmethodID idNativeActivity_getWindowManager = jni->GetMethodID( classNativeActivity
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, "getWindowManager"
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, "()Landroid/view/WindowManager;");
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jmethodID idWindowManager_getDefaultDisplay = jni->GetMethodID( classWindowManager
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, "getDefaultDisplay"
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, "()Landroid/view/Display;");
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jmethodID idDisplayMetrics_constructor = jni->GetMethodID( classDisplayMetrics
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, "<init>"
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, "()V");
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jmethodID idDisplay_getMetrics = jni->GetMethodID( classDisplay
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, "getMetrics"
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, "(Landroid/util/DisplayMetrics;)V");
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if (!idNativeActivity_getWindowManager || !idWindowManager_getDefaultDisplay || !idDisplayMetrics_constructor
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|| !idDisplay_getMetrics)
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{
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app->activity->vm->DetachCurrentThread();
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return false;
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}
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// In Java the following code would be: getWindowManager().getDefaultDisplay().getMetrics(metrics);
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// Note: If you need to call java functions in time-critical places you can split getting the jmethodID's
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// and calling the functions into separate functions as you only have to get the jmethodID's once.
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jobject windowManager = jni->CallObjectMethod(app->activity->clazz, idNativeActivity_getWindowManager);
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if (!windowManager)
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{
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app->activity->vm->DetachCurrentThread();
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return false;
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}
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jobject display = jni->CallObjectMethod(windowManager, idWindowManager_getDefaultDisplay);
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if (!display)
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{
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app->activity->vm->DetachCurrentThread();
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return false;
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}
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jobject displayMetrics = jni->NewObject( classDisplayMetrics, idDisplayMetrics_constructor);
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if (!displayMetrics)
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{
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app->activity->vm->DetachCurrentThread();
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return false;
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}
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jni->CallVoidMethod(display, idDisplay_getMetrics, displayMetrics);
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// access the fields of DisplayMetrics (we ignore the DENSITY constants)
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jfieldID idDisplayMetrics_widthPixels = jni->GetFieldID( classDisplayMetrics, "widthPixels", "I");
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jfieldID idDisplayMetrics_heightPixels = jni->GetFieldID( classDisplayMetrics, "heightPixels", "I");
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jfieldID idDisplayMetrics_density = jni->GetFieldID( classDisplayMetrics, "density", "F");
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jfieldID idDisplayMetrics_densityDpi = jni->GetFieldID( classDisplayMetrics, "densityDpi", "I");
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jfieldID idDisplayMetrics_scaledDensity = jni->GetFieldID( classDisplayMetrics, "scaledDensity", "F");
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jfieldID idDisplayMetrics_xdpi = jni->GetFieldID(classDisplayMetrics, "xdpi", "F");
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jfieldID idDisplayMetrics_ydpi = jni->GetFieldID(classDisplayMetrics, "ydpi", "F");
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if ( idDisplayMetrics_widthPixels )
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metrics.widthPixels = jni->GetIntField(displayMetrics, idDisplayMetrics_widthPixels);
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if ( idDisplayMetrics_heightPixels )
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metrics.heightPixels = jni->GetIntField(displayMetrics, idDisplayMetrics_heightPixels);
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if (idDisplayMetrics_density )
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metrics.density = jni->GetFloatField(displayMetrics, idDisplayMetrics_density);
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if (idDisplayMetrics_densityDpi)
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metrics.densityDpi = jni->GetIntField(displayMetrics, idDisplayMetrics_densityDpi);
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if (idDisplayMetrics_scaledDensity)
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metrics.scaledDensity = jni->GetFloatField(displayMetrics, idDisplayMetrics_scaledDensity);
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if ( idDisplayMetrics_xdpi )
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metrics.xdpi = jni->GetFloatField(displayMetrics, idDisplayMetrics_xdpi);
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if ( idDisplayMetrics_ydpi )
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metrics.ydpi = jni->GetFloatField(displayMetrics, idDisplayMetrics_ydpi);
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app->activity->vm->DetachCurrentThread();
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return true;
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}
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void setSoftInputVisibility(android_app* app, bool visible)
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{
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// NOTE: Unfortunately ANativeActivity_showSoftInput from the NDK does not work and Google does not care.
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// This is based on the solution from @Ratamovic from here: http://stackoverflow.com/questions/5864790/how-to-show-the-soft-keyboard-on-native-activity
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if (!app || !app->activity || !app->activity->vm )
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return;
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JNIEnv* jni = 0;
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app->activity->vm->AttachCurrentThread(&jni, NULL);
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if (!jni )
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return;
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// get all the classes we want to access from the JVM (could be cached)
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jclass classNativeActivity = jni->FindClass("android/app/NativeActivity");
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jclass classInputMethodManager = jni->FindClass("android/view/inputmethod/InputMethodManager");
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jclass classWindow = jni->FindClass("android/view/Window");
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jclass classView = jni->FindClass("android/view/View");
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if (classNativeActivity && classInputMethodManager && classWindow)
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{
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// Get all the methods we want to access from the JVM classes (could be cached)
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jmethodID mid_getSystemService = jni->GetMethodID(classNativeActivity, "getSystemService","(Ljava/lang/String;)Ljava/lang/Object;");
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jmethodID mid_showSoftInput = jni->GetMethodID(classInputMethodManager, "showSoftInput", "(Landroid/view/View;I)Z");
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jmethodID mid_hideSoftInput = jni->GetMethodID(classInputMethodManager, "hideSoftInputFromWindow", "(Landroid/os/IBinder;I)Z");
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jmethodID mid_getWindow = jni->GetMethodID(classNativeActivity, "getWindow", "()Landroid/view/Window;");
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jmethodID mid_getWindowToken = jni->GetMethodID(classView, "getWindowToken", "()Landroid/os/IBinder;");
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jmethodID mid_getDecorView = jni->GetMethodID(classWindow, "getDecorView", "()Landroid/view/View;");
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if ( mid_getSystemService && mid_showSoftInput && mid_hideSoftInput && mid_getWindow && mid_getDecorView && mid_getWindowToken )
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{
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jstring paramInput = jni->NewStringUTF("input_method");
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jobject objInputMethodManager = jni->CallObjectMethod(app->activity->clazz, mid_getSystemService, paramInput);
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jni->DeleteLocalRef(paramInput);
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jobject objWindow = jni->CallObjectMethod(app->activity->clazz, mid_getWindow);
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if ( visible && objInputMethodManager && objWindow)
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{
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jobject objDecorView = jni->CallObjectMethod(objWindow, mid_getDecorView);
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if ( objDecorView )
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{
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int showFlags = 0;
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jni->CallBooleanMethod(objInputMethodManager, mid_showSoftInput, objDecorView, showFlags);
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}
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}
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else if ( !visible && objInputMethodManager && objWindow )
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{
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jobject objDecorView = jni->CallObjectMethod(objWindow, mid_getDecorView);
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if ( objDecorView )
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{
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jobject objBinder = jni->CallObjectMethod(objDecorView, mid_getWindowToken);
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if ( objBinder )
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{
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int hideFlags = 0;
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jni->CallBooleanMethod(objInputMethodManager, mid_hideSoftInput, objBinder, hideFlags);
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}
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}
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}
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}
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}
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app->activity->vm->DetachCurrentThread();
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}
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} // namespace android
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} // namespace irr
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