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Class to get calls from C++
// Usage
// 1º In MainActivity class, onCreate method, add this line:
// InterfaceFromCJNI.callbackMainActivity = this;
// 2º Add this function, defined as interface in InterfaceFromCJNI class:
// @Override
// public void msgFromC(String message)
// {
// // Your own
// Log.d(LOG_TAG, "msgFromC is: " + message);
// }
// Java package
package com.github.vgoni;
// Imports
import android.util.Log;
public final class InterfaceFromCJNI
// Callback for activities. Must be initialized onCreate Activity
static public MainActivity callbackMainActivity;
// Function in Activity to call
interface InterfaceMainActivity
void msgFromC(String message);
// This function is called from JNI
static public void receivedMsgFromC(String message)
Log.d(LOG_TAG, "receivedMsgFromC");
callbackMainActivity.runOnUiThread(new Runnable()
public void run()
// Notify with Toast
Toast.makeText(callbackMainActivity.getApplicationContext(), message, Toast.LENGTH_LONG).show();
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