1 # this file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2014 Romain Chanoir <romain.chanoir@viacesi.fr>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Android Assets and Resources Management
19 # Use the ResourceManager to retrieve resources from the `res` folder of your app
20 # Use the AssetManager to retrieve resources files from the `assets` folder of your app
21 # both are available from `App`
22 # If you write your own resources in your NIT project part of the application,
23 # you are obliged to set a string resource with the name "app_name" or it will be
24 # impossible for you to compile the apk correctly
25 module assets_and_resources
32 import android.content.res.AssetManager;
33 import android.content.res.AssetFileDescriptor;
34 import android.content.res.Resources;
35 import android.content.res.XmlResourceParser;
36 import java.io.IOException;
37 import android.graphics.Bitmap;
38 import android.graphics.BitmapFactory;
39 import android.graphics.drawable.Drawable;
40 import java.io.InputStream;
41 import android.util.Log;
42 import java.io.FileDescriptor;
45 # AssetManager from Java, used by `AssetManager` to access resources in `assets` app's directory
46 # This is a low-level class, use `AssetManager` instead
47 private extern class NativeAssetManager in "Java" `{ android.content.res.AssetManager `}
50 # Close this asset manager
51 fun close in "Java" `{ self.close(); `}
53 # Get the locales that this assets manager contains data for
54 fun get_locales
: Array[JavaString] import Array[JavaString], Array[JavaString].add
in "Java" `{
55 int arr = new_Array_of_JavaString();
56 for (String s : self.getLocales()) {
57 Array_of_JavaString_add(arr, s);
62 # String Array of all the assets at the given path
63 fun list
(path
: JavaString): Array[JavaString] import Array[JavaString], Array[JavaString].add
in "Java" `{
64 int arr = new_Array_of_JavaString();
66 for (String s : self.list(path)) {
67 Array_of_JavaString_add(arr, s);
69 }catch (IOException e) {
70 Log.e("Error retrieving the list of assets at 'path' ", e.getMessage());
76 # Open an asset using ACCESS_STREAMING mode
77 fun open
(file_name
: JavaString): NativeInputStream in "Java" `{
78 InputStream stream = null;
80 stream = self.open(file_name);
81 }catch (IOException e) {
82 Log.e("Error while opening " + file_name, e.getMessage());
88 # Open an asset and return it's file descriptor
89 fun open_fd
(file_name
: JavaString): NativeAssetFileDescriptor in "Java" `{
90 AssetFileDescriptor afd = null;
92 afd = self.openFd(file_name);
93 }catch(IOException e){
94 Log.e("Error while opening " + file_name, e.getMessage());
100 # Open a ,non-asset and return it's file descriptor
101 fun open_non_asset_fd
(file_name
: JavaString): NativeAssetFileDescriptor in "Java" `{
102 AssetFileDescriptor afd = null;
104 afd = self.openNonAssetFd(file_name);
105 }catch(IOException e){
106 Log.e("Error while opening " + file_name, e.getMessage());
113 redef fun new_global_ref
import sys
, Sys.jni_env
`{
114 Sys sys = NativeAssetManager_sys(self);
115 JNIEnv *env = Sys_jni_env(sys);
116 return (*env)->NewGlobalRef(env, self);
120 # Assets manager using a `NativeAssetManager` to manage android assets
123 # Native asset manager
124 private var native_assets_manager
: NativeAssetManager = app
.native_context
.assets
.new_global_ref
is lazy
126 # Close this asset manager
127 fun close
do native_assets_manager
.close
129 # Get the locales that this assets manager contains data for
130 fun locales
: Array[String] do
131 var java_array
= native_assets_manager
.get_locales
132 var nit_array
= new Array[String]
133 for s
in java_array
do
134 nit_array
.add
(s
.to_s
)
139 # Return a string array of all the assets at the given path
140 fun list
(path
: String): Array[String] do
141 sys
.jni_env
.push_local_frame
(8)
142 var java_array
= native_assets_manager
.list
(path
.to_java_string
)
143 var nit_array
= new Array[String]
144 for s
in java_array
do
145 nit_array
.add
(s
.to_s
)
147 sys
.jni_env
.pop_local_frame
151 # Open an asset using ACCESS_STREAMING mode, returning a NativeInputStream
152 private fun open
(file_name
: String): NativeInputStream do
153 sys
.jni_env
.push_local_frame
(2)
154 var return_value
= native_assets_manager
.open
(file_name
.to_java_string
)
155 return return_value
.pop_from_local_frame
158 # Open an asset using it's name and returning a NativeAssetFileDescriptor
160 private fun open_fd
(file_name
: String): NativeAssetFileDescriptor do
161 sys
.jni_env
.push_local_frame
(2)
162 var return_value
= native_assets_manager
.open_fd
(file_name
.to_java_string
).new_global_ref
163 sys
.jni_env
.pop_local_frame
167 # Open a file that is not an asset returning a NativeAssetFileDescriptor
168 private fun open_non_asset_fd
(file_name
: String): NativeAssetFileDescriptor do
169 var return_value
= native_assets_manager
.open_non_asset_fd
(file_name
.to_java_string
)
173 # Return a bitmap from the assets
174 private fun bitmap
(name
: String): NativeBitmap do
175 sys
.jni_env
.push_local_frame
2
176 var return_value
= new NativeBitmap.from_stream
(native_assets_manager
.open
(name
.to_java_string
))
177 return return_value
.pop_from_local_frame
180 # Deallocate the global reference allocated by AssetManager
181 fun destroy
do self.native_assets_manager
.delete_global_ref
184 # Resource manager for android resources placed in the `res` folder of your app
185 # This is a low-level class, use `ResourcesManager` instead
186 private extern class NativeResources in "Java" `{ android.content.res.Resources `}
189 fun get_assets:NativeAssetManager in "Java" `{ return self.getAssets(); `}
190 fun get_color
(id
: Int): Int in "Java" `{ return self.getColor((int)id); `}
191 fun get_boolean(id: Int): Bool in "Java" `{ return self.getBoolean((int)id); `}
192 fun get_dimension
(id
: Int): Int in "Java" `{ return (int)self.getDimension((int)id); `}
193 fun get_drawable(id: Int): NativeDrawable in "Java" `{ return self.getDrawable((int)id); `}
194 fun get_identifier
(name
, def_type
, def_package
: JavaString): Int in "Java" `{ return self.getIdentifier(name, def_type, def_package); `}
195 fun get_integer(id: Int): Int in "Java" `{ return self.getInteger((int)id); `}
196 fun get_string
(id
: Int): JavaString in "Java" `{ return self.getString((int)id); `}
197 fun get_resource_entry_name(resid: Int): JavaString in "Java" `{ return self.getResourceEntryName((int)resid); `}
198 fun get_resource_name
(resid
: Int): JavaString in "Java" `{ return self.getResourceName((int)resid); `}
199 fun get_resource_pakage_name(resid: Int): JavaString in "Java" `{ return self.getResourcePackageName((int)resid); `}
200 fun get_resource_type_name
(resid
: Int): JavaString in "Java" `{ return self.getResourceTypeName((int)resid); `}
203 redef fun new_global_ref import sys, Sys.jni_env `{
204 Sys sys
= NativeResources_sys(self);
205 JNIEnv *env
= Sys_jni_env(sys
);
206 return (*env
)->NewGlobalRef(env
, self);
210 # Resource manager for android resources placed in the `res
` folder of your app
211 class ResourcesManager
213 private var android_resources: NativeResources
215 # The name of the app_package
216 private var app_package: String
218 private init native(res: NativeResources, app_package: String)
220 init(res.new_global_ref, app_package)
223 # Get a color from resources
224 fun color(name: String): Int do
225 sys.jni_env.push_local_frame(3)
226 var return_value = android_resources.get_color(android_resources.get_identifier(name.to_java_string, "color".to_java_string, app_package.to_java_string))
227 sys.jni_env.pop_local_frame
231 # Get a `Bool` from resources
232 fun boolean(name: String): Bool do
233 sys.jni_env.push_local_frame(3)
234 var return_value = android_resources.get_boolean(android_resources.get_identifier(name.to_java_string, "bool".to_java_string, app_package.to_java_string))
235 sys.jni_env.pop_local_frame
239 # Get a dimension from resources
240 # A dimension is specified with a number followed by a unit of measure
241 fun dimension(name: String): Int do
242 sys.jni_env.push_local_frame(3)
243 var return_value = android_resources.get_dimension(android_resources.get_identifier(name.to_java_string, "dimen".to_java_string, app_package.to_java_string))
244 sys.jni_env.pop_local_frame
248 # Get an `Integer` from resources
249 fun integer(name: String): Int do
250 sys.jni_env.push_local_frame(3)
251 var return_value = android_resources.get_integer(android_resources.get_identifier(name.to_java_string, "integer".to_java_string, app_package.to_java_string))
252 sys.jni_env.pop_local_frame
257 # Get a `String` from resources
258 fun string(name: String): String do
259 sys.jni_env.push_local_frame(3)
260 var return_value = android_resources.get_string(android_resources.get_identifier(name.to_java_string, "string".to_java_string, app_package.to_java_string)).to_s
261 sys.jni_env.pop_local_frame
265 # Get a resource ID from one resource in `res
/raw
`folder
266 # you may use this to retrieve the id of a sound for example
267 fun raw_id(name: String): Int do
268 sys.jni_env.push_local_frame(3)
269 var return_value = android_resources.get_identifier(name.to_java_string, "raw".to_java_string, app_package.to_java_string)
270 sys.jni_env.pop_local_frame
274 # Get a drawable from `res
/drawable
` folder
275 private fun drawable(name: String): NativeDrawable do
276 sys.jni_env.push_local_frame(3)
277 var return_value = android_resources.get_drawable(android_resources.get_identifier(name.to_java_string, "drawable".to_java_string, app_package.to_java_string))
278 sys.jni_env.pop_local_frame
282 # Get and ID from a specific resource in `res
/res_type
` folder
283 fun other_id(name, res_type: String): Int do
284 sys.jni_env.push_local_frame(3)
285 var return_value = android_resources.get_identifier(name.to_java_string, res_type.to_java_string, app_package.to_java_string)
286 sys.jni_env.pop_local_frame
290 # Deallocate global reference allocated by ResourcesManager
291 fun destroy do self.android_resources.delete_global_ref
294 # An android Bitmap, get an instance using the AssetManager or the ResourceManager
295 private extern class NativeBitmap in "Java" `{ android.graphics.Bitmap `}
298 # Create a NativeBitmap from a NativeInputStream retrieved with `open` function of the AssetManager
299 # Called by the AssetManager
300 new from_stream
(input_stream
: NativeInputStream) in "Java" `{ return BitmapFactory.decodeStream(input_stream); `}
302 # Create a NativeBitmap using a resource ID and the NativeResources
303 # Called by the ResourceManager
304 new from_resources(res: NativeResources, id: Int) in "Java" `{ return BitmapFactory.decodeResource(res, (int)id); `}
308 # Wraps Java: `int android.graphics.Bitmap.getWidth()`
309 fun width
: Int in "Java" `{ return self.getWidth(); `}
313 # Wraps Java: `int android
.graphics
.Bitmap.getHeight
()`
314 fun height: Int in "Java" `{ return self.getHeight(); `}
316 # Number of bytes per row
318 # Wraps Java: `int android.graphics.Bitmap.getRowBytes()`
319 fun row_bytes
: Int in "Java" `{
320 return self.getRowBytes();
323 # Does this bitmap has an alpha channel?
325 # Wraps Java: `boolean android.graphics.Bitmap.hasAlpha()`
326 fun has_alpha
: Bool in "Java" `{
327 return self.hasAlpha();
331 redef fun new_global_ref
import sys
, Sys.jni_env
`{
332 Sys sys = NativeBitmap_sys(self);
333 JNIEnv *env = Sys_jni_env(sys);
334 return (*env)->NewGlobalRef(env, self);
337 redef fun pop_from_local_frame_with_env
(jni_env
) `{
338 return (*jni_env)->PopLocalFrame(jni_env, self);
342 # Android AssetFileDescriptor, can be retrieve by AssetManager and used to load a sound in a SoundPool
343 extern class NativeAssetFileDescriptor in "Java" `{ android.content.res.AssetFileDescriptor `}
346 fun close in "Java" `{
349 }catch
(IOException e
){
353 fun create_input_stream: NativeFileInputStream in "Java" `{
355 return self.createInputStream
();
356 }catch
(IOException e
){
357 Log.e
("Error creating input_stream", e
.getMessage
());
362 fun create_output_stream: NativeFileOutputStream in "Java" `{
364 return self.createOutputStream
();
365 }catch
(IOException e
){
366 Log.e
("Error creating output stream", e
.getMessage
());
371 fun describe_contents: Int in "Java" `{ return (int)self.describeContents(); `}
372 fun declared_length
: Int in "Java" `{ return (int)self.getDeclaredLength(); `}
373 # fun extras: Bundle in "Java" `{ return self.getExtras(); `}
375 fun file_descriptor
: NativeFileDescriptor in "Java" `{
376 FileDescriptor fd = self.getFileDescriptor();
378 Log.e("AssetFileDesciptorError", "Can't retrieve the FileDescriptor of this AssetFileDescriptor");
383 fun length
: Int in "Java" `{ return (int)self.getLength(); `}
384 fun start_offset: Int in "Java" `{ return (int)self.getStartOffset(); `}
385 redef fun to_s
import JavaString.to_s
in "Java" `{ return JavaString_to_s(self.toString()); `}
388 redef fun new_global_ref import sys, Sys.jni_env `{
389 Sys sys
= NativeAssetFileDescriptor_sys(self);
390 JNIEnv *env
= Sys_jni_env(sys
);
391 return (*env
)->NewGlobalRef(env
, self);
395 # Native class representing something drawable, can be retrieved from the resources
396 # will be used by the GUI
397 private extern class NativeDrawable in "Java" `{ android.graphics.drawable.Drawable `}
401 # Resource Manager used to manage resources placed in the `res` folder of the app
402 var resource_manager
: ResourcesManager is lazy
do
403 var res
= native_context
.resources
404 var pkg
= native_context
.package_name
405 return new ResourcesManager.native
(res
, pkg
.to_s
)
408 # Assets Manager used to manage resources placed in the `assets` folder of the app
409 var asset_manager
: AssetManager is lazy
do return new AssetManager
412 redef extern class NativeContext
414 # Get the native AssetsManager of the application, used to initialize the nit's AssetManager
415 private fun assets
: NativeAssetManager in "Java" `{
416 return self.getAssets();
419 # Get the package name of the application
420 private fun package_name
: JavaString in "Java" `{
421 return self.getPackageName();
424 # Get the native ResourceManager of the application, used to initialize the nit's ResourceManager
425 private fun resources
: NativeResources in "Java" `{
426 return self.getResources();