File: al_android_get_jni_env.3

package info (click to toggle)
allegro5 2%3A5.2.6.0-3%2Bdeb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 24,212 kB
  • sloc: ansic: 125,319; cpp: 15,781; objc: 4,579; python: 2,802; java: 2,254; javascript: 1,204; sh: 1,002; makefile: 51; perl: 37; xml: 25; pascal: 24
file content (43 lines) | stat: -rw-r--r-- 1,154 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
.\" Automatically generated by Pandoc 1.19.2.4
.\"
.TH "al_android_get_jni_env" "3" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
al_android_get_jni_env \- Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include\ <allegro5/allegro_android.h>

JNIEnv\ *al_android_get_jni_env(void)
\f[]
.fi
.SH DESCRIPTION
.PP
Returns the Android JNI environment used by Allegro to call into Java.
As a convenience this function provides it to the user so there is no
need to obtain it yourself.
.PP
For example if you have a Java method "void send(String message)" in
your activity class, you could call it like this from C code:
.IP
.nf
\f[C]
JNIEnv\ *\ env\ =\ al_android_get_jni_env();
jclass\ class_id\ =\ (*\ env)\->GetObjectClass(env,\ al_android_get_activity());
jmethodID\ method_id\ =\ (*\ env)\->GetMethodID(env,\ class_id,\ "send",
\ \ \ \ "(Ljava/lang/String;)V");
jstring\ jdata\ =\ (*\ env)\->NewStringUTF(env,\ "Hello\ Java!");
(*\ env)\->CallVoidMethod(env,\ al_android_get_activity(),\ method_id,\ jdata);
(*\ env)\->DeleteLocalRef(env,\ jdata);
\f[]
.fi
.SH SINCE
.PP
5.2.2
.RS
.PP
\f[I][Unstable API]:\f[] This API is new and subject to refinement.
.RE