2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #ifndef ANDROID_NATIVE_ACTIVITY_H
19 #define ANDROID_NATIVE_ACTIVITY_H
22 #include <sys/types.h>
26 #include <android/asset_manager.h>
27 #include <android/input.h>
28 #include <android/native_window.h>
34 struct ANativeActivityCallbacks;
37 * This structure defines the native side of an android.app.NativeActivity.
38 * It is created by the framework, and handed to the application's native
39 * code as it is being launched.
41 typedef struct ANativeActivity {
43 * Pointer to the callback function table of the native application.
44 * You can set the functions here to your own callbacks. The callbacks
45 * pointer itself here should not be changed; it is allocated and managed
46 * for you by the framework.
48 struct ANativeActivityCallbacks* callbacks;
51 * The global handle on the process's Java VM.
56 * JNI context for the main thread of the app. Note that this field
57 * can ONLY be used from the main thread of the process; that is, the
58 * thread that calls into the ANativeActivityCallbacks.
63 * The NativeActivity Java class.
68 * Path to this application's internal data directory.
70 const char* internalDataPath;
73 * Path to this application's external (removable/mountable) data directory.
75 const char* externalDataPath;
78 * The platform's SDK version code.
83 * This is the native instance of the application. It is not used by
84 * the framework, but can be set by the application to its own instance
90 * Pointer to the Asset Manager instance for the application. The application
91 * uses this to access binary assets bundled inside its own .apk file.
93 AAssetManager* assetManager;
97 * These are the callbacks the framework makes into a native application.
98 * All of these callbacks happen on the main thread of the application.
99 * By default, all callbacks are NULL; set to a pointer to your own function
102 typedef struct ANativeActivityCallbacks {
104 * NativeActivity has started. See Java documentation for Activity.onStart()
105 * for more information.
107 void (*onStart)(ANativeActivity* activity);
110 * NativeActivity has resumed. See Java documentation for Activity.onResume()
111 * for more information.
113 void (*onResume)(ANativeActivity* activity);
116 * Framework is asking NativeActivity to save its current instance state.
117 * See Java documentation for Activity.onSaveInstanceState() for more
118 * information. The returned pointer needs to be created with malloc();
119 * the framework will call free() on it for you. You also must fill in
120 * outSize with the number of bytes in the allocation. Note that the
121 * saved state will be persisted, so it can not contain any active
122 * entities (pointers to memory, file descriptors, etc).
124 void* (*onSaveInstanceState)(ANativeActivity* activity, size_t* outSize);
127 * NativeActivity has paused. See Java documentation for Activity.onPause()
128 * for more information.
130 void (*onPause)(ANativeActivity* activity);
133 * NativeActivity has stopped. See Java documentation for Activity.onStop()
134 * for more information.
136 void (*onStop)(ANativeActivity* activity);
139 * NativeActivity is being destroyed. See Java documentation for Activity.onDestroy()
140 * for more information.
142 void (*onDestroy)(ANativeActivity* activity);
145 * Focus has changed in this NativeActivity's window. This is often used,
146 * for example, to pause a game when it loses input focus.
148 void (*onWindowFocusChanged)(ANativeActivity* activity, int hasFocus);
151 * The drawing window for this native activity has been created. You
152 * can use the given native window object to start drawing.
154 void (*onNativeWindowCreated)(ANativeActivity* activity, ANativeWindow* window);
157 * The drawing window for this native activity has been resized. You should
158 * retrieve the new size from the window and ensure that your rendering in
161 void (*onNativeWindowResized)(ANativeActivity* activity, ANativeWindow* window);
164 * The drawing window for this native activity needs to be redrawn. To avoid
165 * transient artifacts during screen changes (such resizing after rotation),
166 * applications should not return from this function until they have finished
167 * drawing their window in its current state.
169 void (*onNativeWindowRedrawNeeded)(ANativeActivity* activity, ANativeWindow* window);
172 * The drawing window for this native activity is going to be destroyed.
173 * You MUST ensure that you do not touch the window object after returning
174 * from this function: in the common case of drawing to the window from
175 * another thread, that means the implementation of this callback must
176 * properly synchronize with the other thread to stop its drawing before
177 * returning from here.
179 void (*onNativeWindowDestroyed)(ANativeActivity* activity, ANativeWindow* window);
182 * The input queue for this native activity's window has been created.
183 * You can use the given input queue to start retrieving input events.
185 void (*onInputQueueCreated)(ANativeActivity* activity, AInputQueue* queue);
188 * The input queue for this native activity's window is being destroyed.
189 * You should no longer try to reference this object upon returning from this
192 void (*onInputQueueDestroyed)(ANativeActivity* activity, AInputQueue* queue);
195 * The rectangle in the window in which content should be placed has changed.
197 void (*onContentRectChanged)(ANativeActivity* activity, const ARect* rect);
200 * The current device AConfiguration has changed. The new configuration can
201 * be retrieved from assetManager.
203 void (*onConfigurationChanged)(ANativeActivity* activity);
206 * The system is running low on memory. Use this callback to release
207 * resources you do not need, to help the system avoid killing more
208 * important processes.
210 void (*onLowMemory)(ANativeActivity* activity);
211 } ANativeActivityCallbacks;
214 * This is the function that must be in the native code to instantiate the
215 * application's native activity. It is called with the activity instance (see
216 * above); if the code is being instantiated from a previously saved instance,
217 * the savedState will be non-NULL and point to the saved data. You must make
218 * any copy of this data you need -- it will be released after you return from
221 typedef void ANativeActivity_createFunc(ANativeActivity* activity,
222 void* savedState, size_t savedStateSize);
225 * The name of the function that NativeInstance looks for when launching its
226 * native code. This is the default function that is used, you can specify
227 * "android.app.func_name" string meta-data in your manifest to use a different
230 extern ANativeActivity_createFunc ANativeActivity_onCreate;
233 * Finish the given activity. Its finish() method will be called, causing it
234 * to be stopped and destroyed. Note that this method can be called from
235 * *any* thread; it will send a message to the main thread of the process
236 * where the Java finish call will take place.
238 void ANativeActivity_finish(ANativeActivity* activity);
241 * Change the window format of the given activity. Calls getWindow().setFormat()
242 * of the given activity. Note that this method can be called from
243 * *any* thread; it will send a message to the main thread of the process
244 * where the Java finish call will take place.
246 void ANativeActivity_setWindowFormat(ANativeActivity* activity, int32_t format);
249 * Change the window flags of the given activity. Calls getWindow().setFlags()
250 * of the given activity. Note that this method can be called from
251 * *any* thread; it will send a message to the main thread of the process
252 * where the Java finish call will take place. See window.h for flag constants.
254 void ANativeActivity_setWindowFlags(ANativeActivity* activity,
255 uint32_t addFlags, uint32_t removeFlags);
258 * Flags for ANativeActivity_showSoftInput; see the Java InputMethodManager
259 * API for documentation.
262 ANATIVEACTIVITY_SHOW_SOFT_INPUT_IMPLICIT = 0x0001,
263 ANATIVEACTIVITY_SHOW_SOFT_INPUT_FORCED = 0x0002,
267 * Show the IME while in the given activity. Calls InputMethodManager.showSoftInput()
268 * for the given activity. Note that this method can be called from
269 * *any* thread; it will send a message to the main thread of the process
270 * where the Java finish call will take place.
272 void ANativeActivity_showSoftInput(ANativeActivity* activity, uint32_t flags);
275 * Flags for ANativeActivity_hideSoftInput; see the Java InputMethodManager
276 * API for documentation.
279 ANATIVEACTIVITY_HIDE_SOFT_INPUT_IMPLICIT_ONLY = 0x0001,
280 ANATIVEACTIVITY_HIDE_SOFT_INPUT_NOT_ALWAYS = 0x0002,
284 * Hide the IME while in the given activity. Calls InputMethodManager.hideSoftInput()
285 * for the given activity. Note that this method can be called from
286 * *any* thread; it will send a message to the main thread of the process
287 * where the Java finish call will take place.
289 void ANativeActivity_hideSoftInput(ANativeActivity* activity, uint32_t flags);
295 #endif // ANDROID_NATIVE_ACTIVITY_H