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able to get a field from Polyline in JNI #1716

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This commit is contained in:
Nicholas Hallahan
2015-07-15 17:31:37 -07:00
parent 441c84c213
commit 8107501edb
2 changed files with 48 additions and 1 deletions
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48
android/cpp/jni.cpp
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@@ -40,6 +40,10 @@ jmethodID latLngConstructorId = nullptr;
jfieldID latLngLatitudeId = nullptr;
jfieldID latLngLongitudeId = nullptr;
jclass polylineClass = nullptr;
jmethodID polylineConstructorId = nullptr;
jfieldID polylineAlphaId = nullptr;
jclass latLngZoomClass = nullptr;
jmethodID latLngZoomConstructorId = nullptr;
jfieldID latLngZoomLatitudeId = nullptr;
@@ -460,8 +464,21 @@ jlong JNICALL nativeAddPolyline(JNIEnv *env, jobject obj, jlong nativeMapViewPtr
assert(nativeMapViewPtr != 0);
// NativeMapView *nativeMapView = reinterpret_cast<NativeMapView *>(nativeMapViewPtr);
// ***** Java fields ***** //
return -1;
// float alpha;
// boolean visible;
// List<LatLng> points
// int color
// float width
jfloat alpha = env->GetFloatField(polyline, polylineAlphaId);
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
return -1;
}
return (jlong)alpha;
}
void JNICALL nativeRemoveAnnotation(JNIEnv *env, jobject obj, jlong nativeMapViewPtr, jlong annotationId) {
@@ -821,6 +838,24 @@ extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved) {
return JNI_ERR;
}
polylineClass = env->FindClass("com/mapbox/mapboxgl/annotations/Polyline");
if (polylineClass == nullptr) {
env->ExceptionDescribe();
return JNI_ERR;
}
polylineConstructorId = env->GetMethodID(polylineClass, "<init>", "()V");
if (polylineConstructorId == nullptr) {
env->ExceptionDescribe();
return JNI_ERR;
}
polylineAlphaId = env->GetFieldID(polylineClass, "alpha", "F");
if (polylineAlphaId == nullptr) {
env->ExceptionDescribe();
return JNI_ERR;
}
latLngZoomClass = env->FindClass("com/mapbox/mapboxgl/geometry/LatLngZoom");
if (latLngZoomClass == nullptr) {
env->ExceptionDescribe();
@@ -1069,6 +1104,12 @@ extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved) {
return JNI_ERR;
}
polylineClass = reinterpret_cast<jclass>(env->NewGlobalRef(polylineClass));
if (polylineClass == nullptr) {
env->ExceptionDescribe();
return JNI_ERR;
}
latLngZoomClass = reinterpret_cast<jclass>(env->NewGlobalRef(latLngZoomClass));
if (latLngZoomClass == nullptr) {
env->ExceptionDescribe();
@@ -1152,6 +1193,11 @@ extern "C" JNIEXPORT void JNICALL JNI_OnUnload(JavaVM *vm, void *reserved) {
latLngLongitudeId = nullptr;
latLngLatitudeId = nullptr;
env->DeleteGlobalRef(polylineClass);
polylineClass = nullptr;
polylineConstructorId = nullptr;
polylineAlphaId = nullptr;
env->DeleteGlobalRef(latLngZoomClass);
latLngZoomClass = nullptr;
latLngZoomConstructorId = nullptr;