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#include <linux/fs.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/cdev.h>
#include <linux/errno.h>

#define DEVICENAME "hello_world"
#define READINGDATA "Hello World Reads!\n"

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extern "C"
JNIEXPORT void JNICALL
Java_com_example_androidndk_1passing_1complex_1data_NativeLibrary_callTheCallBackMethod(JNIEnv *env,
                                                                                        jobject instance) {

    // Get jclass of the instance
    jclass jClassInstance = env->GetObjectClass(instance);

    // Get java callback method
    jmethodID callBackJava = env->GetMethodID(jClassInstance, "callBack", "(ILjava/lang/String;)V");

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public native void callTheCallBackMethod();

private void callBack(int data, String stringValue) {
    callBackInterface.callBackEvent(stringValue + String.valueOf(data));
}

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/** 
* On Call Back From JNI Button Clicked Event 
* 
* @param view 
*/
public void onCallBackFromJNIClicked(View view) {
    // Call JNI callback method    
    nativeLib.callTheCallBackMethod();
}

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extern "C"
JNIEXPORT jobject JNICALL
Java_com_example_androidndk_1passing_1complex_1data_NativeLibrary_getObjectFromJNI(JNIEnv *env,
                                                                                   jobject instance) {

    // Create a jclass from actual Java object class path
    jclass sampleObjClass = env->FindClass(
            "com/example/androidndk_passing_complex_data/SampleDataObj");
    jmethodID methodId = env->GetMethodID(sampleObjClass, "<init>", "()V");
    jobject sampleObj = env->NewObject(sampleObjClass, methodId);

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/** 
* On Get Object From JNI Button Clicked Event 
* 
* @param view 
*/
public void onGetObjectFromJNI(View view) {
    TextView textView = findViewById(R.id.textViewGetObjectFromJNI);    
    SampleDataObj dataObj = nativeLib.getObjectFromJNI();    
    textView.setText(dataObj.getSampleString());
}

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extern "C"
JNIEXPORT jint JNICALL
Java_com_example_androidndk_1passing_1complex_1data_NativeLibrary_passObjectToJNI(JNIEnv *env,
                                                                                  jobject instance,
                                                                                  jobject sampleDataObj) {

    // Get jclass of the object
    jclass sampleDataOBJClass = env->GetObjectClass(sampleDataObj);

    // Get data field IDs of the object

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/** 
  * On Pass Object To JNI Button Clicked Event 
  * 
  * @param view 
  */
public void onPassObjectToJNI(View view) {
    TextView textView = findViewById(R.id.textViewPassObjectToJNI);
    //Create Sample Data Object    
    SampleDataObj sampleDataObj = new SampleDataObj();    
    sampleDataObj.setSampleInt(0);    

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extern "C"
JNIEXPORT jint JNICALL
Java_com_example_androidndk_1passing_1complex_1data_NativeLibrary_passingDataToJni(JNIEnv *env,
                                                                                   jobject instance,
                                                                                   jdoubleArray tmpArray_,
                                                                                   jint tmpInt,
                                                                                   jfloat tmpFloat) {
    jdouble *tmpArray = env->GetDoubleArrayElements(tmpArray_, NULL);
    int ret = 0;

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/** 
  * On Pass Data To JNI Button Clicked Event 
  * 
  * @param view 
  */
public void onPassDataToJNIButtonClicked(View view) {
    TextView textView = findViewById(R.id.textViewPassDataToJNI);
    // Temp data which passing to JNI    
    double[] tmpArray = {1, 2, 3};     
    int tmpInt = 1;