Android samples are renamed

samples/android/tutorial-4-mixed/jni/jni_part.cpp

@@ -0,0 +1,23 @@
+#include <jni.h>
+#include <opencv2/core/core.hpp>
+#include <opencv2/imgproc/imgproc.hpp>
+#include <opencv2/features2d/features2d.hpp>
+#include <vector>
+
+using namespace std;
+using namespace cv;
+
+extern "C" {
+JNIEXPORT void JNICALL Java_org_opencv_samples_s4_Sample4View_FindFeatures(JNIEnv* env, jobject thiz, jlong addrGray, jlong addrRgba)
+{
+    Mat* pMatGr=(Mat*)addrGray;
+    Mat* pMatRgb=(Mat*)addrRgba;
+    vector<KeyPoint> v;
+
+    FastFeatureDetector detector(50);
+    detector.detect(*pMatGr, v);
+    for( size_t i = 0; i < v.size(); i++ )
+        circle(*pMatRgb, Point(v[i].pt.x, v[i].pt.y), 10, Scalar(255,0,0,255));
+}
+
+}