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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_NATIVE_ACTIVITY_H
#define ANDROID_NATIVE_ACTIVITY_H
#include <stdint.h>
#include <sys/types.h>
#include <jni.h>
#ifdef __cplusplus
extern "C" {
#endif
// Temporary until native surface API is defined.
struct android_surface_t;
typedef struct android_surface_t android_surface_t;
struct android_activity_callbacks_t;
/**
* This structure defines the native side of an android.app.NativeActivity.
* It is created by the framework, and handed to the application's native
* code as it is being launched.
*/
typedef struct android_activity_t {
/**
* Pointer to the callback function table of the native application.
* You can set the functions here to your own callbacks. The callbacks
* pointer itself here should not be changed; it is allocated and managed
* for you by the framework.
*/
struct android_activity_callbacks_t* callbacks;
/**
* JNI context for the main thread of the app.
*/
JNIEnv* env;
/**
* The NativeActivity Java class.
*/
jobject clazz;
/**
* This is the native instance of the application. It is not used by
* the framework, but can be set by the application to its own instance
* state.
*/
void* instance;
} android_activity_t;
/**
* These are the callbacks the framework makes into a native application.
* All of these callbacks happen on the main thread of the application.
* By default, all callbacks are NULL; set to a pointer to your own function
* to have it called.
*/
typedef struct android_activity_callbacks_t {
/**
* NativeActivity has started. See Java documentation for Activity.onStart()
* for more information.
*/
void (*onStart)(android_activity_t* activity);
/**
* NativeActivity has resumed. See Java documentation for Activity.onResume()
* for more information.
*/
void (*onResume)(android_activity_t* activity);
/**
* Framework is asking NativeActivity to save its current instance state.
* See Java documentation for Activity.onSaveInstanceState() for more
* information. The returned pointer needs to be created with malloc();
* the framework will call free() on it for you. You also must fill in
* outSize with the number of bytes in the allocation. Note that the
* saved state will be persisted, so it can not contain any active
* entities (pointers to memory, file descriptors, etc).
*/
void* (*onSaveInstanceState)(android_activity_t* activity, size_t* outSize);
/**
* NativeActivity has paused. See Java documentation for Activity.onPause()
* for more information.
*/
void (*onPause)(android_activity_t* activity);
/**
* NativeActivity has stopped. See Java documentation for Activity.onStop()
* for more information.
*/
void (*onStop)(android_activity_t* activity);
/**
* NativeActivity is being destroyed. See Java documentation for Activity.onDestroy()
* for more information.
*/
void (*onDestroy)(android_activity_t* activity);
/**
* Focus has changed in this NativeActivity's window. This is often used,
* for example, to pause a game when it loses input focus.
*/
void (*onWindowFocusChanged)(android_activity_t* activity, int hasFocus);
/**
* The drawing surface for this native activity has been created. You
* can use the given surface object to start drawing. NOTE: surface
* drawing API is not yet defined.
*/
void (*onSurfaceCreated)(android_activity_t* activity, android_surface_t* surface);
/**
* The drawing surface for this native activity has changed. The surface
* given here is guaranteed to be the same as the one last given to
* onSurfaceCreated. This is simply to inform you about interesting
* changed to that surface.
*/
void (*onSurfaceChanged)(android_activity_t* activity, android_surface_t* surface,
int format, int width, int height);
/**
* The drawing surface for this native activity is going to be destroyed.
* You MUST ensure that you do not touch the surface object after returning
* from this function: in the common case of drawing to the surface from
* another thread, that means the implementation of this callback must
* properly synchronize with the other thread to stop its drawing before
* returning from here.
*/
void (*onSurfaceDestroyed)(android_activity_t* activity, android_surface_t* surface);
/**
* The system is running low on memory. Use this callback to release
* resources you do not need, to help the system avoid killing more
* important processes.
*/
void (*onLowMemory)(android_activity_t* activity);
} android_activity_callbacks_t;
/**
* This is the function that must be in the native code to instantiate the
* application's native activity. It is called with the activity instance (see
* above); if the code is being instantiated from a previously saved instance,
* the savedState will be non-NULL and point to the saved data.
*/
typedef void android_activity_create_t(android_activity_t* activity,
void* savedState, size_t savedStateSize);
/**
* The name of the function that NativeInstance looks for when launching its
* native code.
*/
extern android_activity_create_t android_onCreateActivity;
#ifdef __cplusplus
};
#endif
#endif // ANDROID_NATIVE_ACTIVITY_H
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