Hi,

I'm trying to use my C code and works fine, but when I have to call a function that takes Structs as input and/or output, I don't know how to send the information in JS. Example:

** .h File **

struct input_example {
    struct other_struct othStruct;
    struct internal_struct internalStruct;
    struct stores_external_Struct externalStruct[3];
    char path[200];
    char file [20];
    char database[200];
    int id;
};
struct output_example {
    int id;
    char somechar[100];
    int limitIntegers[15];
    float somefloat;
};

** .C File **

#include "file.h"
long calc_example(struct input_example *input, struct output_example *output)
{
 .... all code ....
}

** ..js File **

/*global cordova, module*/
module.exports = {
    calc_example: function(STRUCT ,successCallback, errorCallback) {
        cordova.exec(successCallback, errorCallback, "HelloCPlugin", "calc_example", [STRUCT]);
    },

How to call a function with input sctructs directly from JS file?

I don't know how to pass parameters as struct values in JS file. May be as an Array, multi-array?

Thank you!

When I run my Ionic project with this plugin, after the launch on the device appears an alert that says:

Error initializing Cordova: Class not found

How can i fix this problem?

Hi Dave,

I have been looking at your example of a cordova compiler for C via a Cordova plugin. This is new territory for me so please bear with my ignorance on this subject.

I have a question that I hope you might be able to answer: I have a unique challenge in that I want to process some raw data received on my phone via bluetooth, but the processing algorithm is written in C. Based on your example, I'm not sure whether it is possible to do this without somehow importing the data directly into the C code.

Am I mistaken? Would it be possible to import the raw data into my Ionic app and have it processed by something similar to your plugin and then have the output available to my app?

My thanks in advance.

I downloaded the plugin and run it on the test project. However, when I run it on my emulator I had class not found ! (and I hadn't changed the C code yet!)
android version: 8.0.0
Cordova version: 9.0.0 ([email protected])

Hi,

I'm getting this error every time I run ./compile-ios:
clang: error: invalid iOS deployment version '-miphoneos-version-min=13.5', iOS 10 is the maximum deployment target for 32-bit targets [-Winvalid-ios-deployment-target]

Do you any idea?

hello,
I'm trying to make the test project work (cordova-plugin-hello-c) with [email protected] but I get this error:

cordova run android
cp: copyFileSync: could not write to dest file (code=ENOENT):/home/xxx/workspace/cordova-wrapper-c/platforms/android/res/xml/config.xml

Error: Unhandled error. (Parsing /home/xxx/workspace/cordova-wrapper-c/platforms/android/res/xml/config.xml failed)

I think the problem is that this plugin does not support [email protected]. How can I integrate it into my project with [email protected]?

Hello, after downloading the test-project and executing "cordova platform add android" I get this Error.

Any idea how to fix this?

thx

hi,
I'm trying to make the test project work with [email protected] but when I run on Android device, the test app starts but outputs only deviceready.
In the Android Studio Logcat this warn comes back:

Rejecting re-init on previously-failed class java.lang.Class<com.example.HelloCJni>: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/base.apk"],nativeLibraryDirectories=[/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/lib/arm64, /system/lib64, /system/vendor/lib64]]] couldn't find "libhelloc.so"
java.lang.NoClassDefFoundError: com.example.HelloCJni
at com.example.HelloCJni.calculate(Native Method)
at com.example.HelloCPlugin.execute(HelloCPlugin.java:35)
at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:98)
at org.apache.cordova.PluginManager.exec(PluginManager.java:132)
at org.apache.cordova.CordovaBridge.jsExec(CordovaBridge.java:59)
at org.apache.cordova.engine.SystemExposedJsApi.exec(SystemExposedJsApi.java:41)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:325)
at android.os.Looper.loop(Looper.java:142)
at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/base.apk"],nativeLibraryDirectories=[/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/lib/arm64, /system/lib64, /system/vendor/lib64]]] couldn't find "libhelloc.so"
at java.lang.Runtime.loadLibrary0(Runtime.java:1011)
at java.lang.System.loadLibrary(System.java:1657)
at com.example.HelloCJni.(HelloCJni.java:12)
at com.example.HelloCJni.getArch(Native Method)
at com.example.HelloCPlugin.execute(HelloCPlugin.java:28)

I do not know if this is the problem but before the support at cordova-android@7, the test app worked with cordova-platform@6.

Thanks

So, how can i send strings from JS to JAVA and JAVA to C++ Libraries. The C++ libraries too return the strings to JS to answer the user ?

Because the files do not work.

To send the strings from JS :
loadfileae.myLoad("string1", "string2", "string3", function(msg){
alert(msg);

},function(err){
alert(err);
});

Plugin JS :
module.exports = {
myLoad: function (setData1,setData2,setData3, successCallback, errorCallback) {
cordova.exec(successCallback, errorCallback, "LoadFileAe", "myLoad", [setData1, setData2, setData3]);
}
};

JAVA 1 :
package com.ae.plugin;

import org.apache.cordova.*;
import org.json.JSONArray;
import org.json.JSONException;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class LoadFileAe extends CordovaPlugin {

protected static final String TAG = "LoadFile Plugin";
protected CallbackContext context;

@OverRide
public boolean execute(String action, JSONArray data, CallbackContext callbackContext) throws JSONException {
context = callbackContext;
boolean result = true;

try {
if (action.equals("myLoad")) {
String setData1 = data.getString(0);
String setData2 = data.getString(1);
String setData3 = data.getString(2);
String jniOutput = LoadFileAeJni.stringFromJNI(setData1, setData2, setData3);
String output = jniOutput;
callbackContext.success(output);

}else{
handleError("Invalid loader file !");
result = false;
}
} catch (Exception e) {
handleException(e);
result = false;
}
return result;
}

private void handleError(String errorMsg) {
try {
Log.e(TAG, errorMsg);
context.error(errorMsg);
} catch (Exception e) {
Log.e(TAG, e.toString());
}
}

private void handleException(Exception exception) {
handleError(exception.toString());
}

}

JAVA 2 :
package com.ae.plugin;

import android.app.Activity;
import android.widget.TextView;
import android.os.Bundle;

public class LoadFileAeJni {

public static native String stringFromJNI(String setData1, String setData2, String setData3);
static {
System.loadLibrary("loadfileae-jni");
}
}

C++ :
#include <string.h>
#include <jni.h>

using namespace std;

JNIEXPORT jstring JNICALL Java_com_ae_plugin_LoadFileAeJni_stringFromJNI
(JNIEnv *env,jobject thisObj, jstring getData1, jstring getData2, jstring getData3){

const char *fichier = env->GetStringUTFChars(getData1, NULL);
const char *uuid = env->GetStringUTFChars(getData2, NULL);
const string *extention = env->GetStringUTFChars(getData3, NULL);

if (fichier == NULL){
fichier="Aucun fichier detecté !";
}
if (uuid == NULL){
uuid="Aucune clé detecté !";
}
if (extention == NULL){
extention="Aucune extention detecté !";
}

env->ReleaseStringUTFChars(getData1, fichier);
env->ReleaseStringUTFChars(getData2, uuid);
env->ReleaseStringUTFChars(getData3, extention);

char resultat[999];
cout << "K7Player C++ Response : " << fichier << "Uuid : " << uuid << "Extention : " << extention << endl;
cin >> resultat;

return env->NewStringUTF(resultat.c_str());
}

Hello,
I'm editing the files .c and .h in the /src/common/ but when I go to run compile-android it just generates the .so for arm64-v8a, armeabi-v7a, x86 and x86_64 architectures, omitting armeabi, mips and mips64.
This is the output:

./compile-android
Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-14.
[arm64-v8a] Compile : helloc <= hello.c
[arm64-v8a] Compile : helloc <= mycomponent.c
[arm64-v8a] Compile : helloc <= mylib.c
[arm64-v8a] Compile : helloc <= mypart.c
[arm64-v8a] SharedLibrary : libhelloc.so
[arm64-v8a] Install : libhelloc.so => libs/arm64-v8a/libhelloc.so
[armeabi-v7a] Compile thumb : helloc <= hello.c
[armeabi-v7a] Compile thumb : helloc <= mycomponent.c
[armeabi-v7a] Compile thumb : helloc <= mylib.c
[armeabi-v7a] Compile thumb : helloc <= mypart.c
[armeabi-v7a] SharedLibrary : libhelloc.so
[armeabi-v7a] Install : libhelloc.so => libs/armeabi-v7a/libhelloc.so
[x86] Compile : helloc <= hello.c
[x86] Compile : helloc <= mycomponent.c
[x86] Compile : helloc <= mylib.c
[x86] Compile : helloc <= mypart.c
[x86] SharedLibrary : libhelloc.so
[x86] Install : libhelloc.so => libs/x86/libhelloc.so
[x86_64] Compile : helloc <= hello.c
[x86_64] Compile : helloc <= mycomponent.c
[x86_64] Compile : helloc <= mylib.c
[x86_64] Compile : helloc <= mypart.c
[x86_64] SharedLibrary : libhelloc.so
[x86_64] Install : libhelloc.so => libs/x86_64/libhelloc.so

Once the lib.so is generated, I remove the android platform, re-add it and I get this error back

workspace/cordova-plugin-hello-c-test/plugins/cordova-plugin-hello-c/src/android/libs/armeabi/libhelloc.so" not found!

How do I generate the missing architectures? is my flow wrong?
 
Thanks

Hello,

now i get this error while trying to "cordova platform add android".

have you changed something?

Hello, when I execute the "compile-android.cmd" i get the following error.

Would be great if somebody could help me.

Hello,

do you think it is possible to get the Dlib library working with your code?

thx

How do we include custom CFLAGS in the below makefile

SRC=$(wildcard $(SRC_PATH)/*.c)
OBJS=$(patsubst %.c,%.o,$(SRC))

LDLIBS=$(patsubst %, $(TARGET_PATH)/lib%.a, $(DEPS))

all:$(ARCH)-$(LIBNAME).a

$(ARCH)-$(LIBNAME).a: $(OBJS)
@echo $(LDLIBS) $(OBJS)
$(AR) rcs $@ $(OBJS)
ranlib $@

clean:
rm $(OBJS)

.PHONY: realclean
realclean: clean
rm *.a