android: gps seems to be running now. Strings will be transmitted between java and c++

android/AndroidManifest.xml

@@ -26,12 +26,9 @@
         </activity>
     </application>
 	<uses-feature android:glEsVersion="0x00020000" />
-	<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION">
+	<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
-	</uses-permission>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
-    </uses-permission>
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"> 
-    </uses-permission>
 
 </manifest> 
 <!-- END_INCLUDE(manifest) -->

android/jni/main.c

@@ -451,27 +451,23 @@ int gps_android_device_read (char *ptr, int ptrsize) {
 		return 0;
 	}
 
-	d_printf ("gps_android_device_read:");
+	/* call up the java method to prepare a new line */
-
+//	d_printf ("gps_android_device_read: call java");
 	jclass clazz = (*env)->GetObjectClass(env, activity->clazz);
 	jmethodID methodID = (*env)->GetMethodID(env, clazz, "GPSDataGetLine", "()V");
 	(*env)->CallVoidMethod(env, activity->clazz, methodID);
-
+//	d_printf ("gps_android_device_read: finished java call");
-	d_printf ("try to get line");
+	/* retrieve the new line, copy new line, release new line */
 	jfieldID fid = (*env)->GetFieldID(env, clazz, "gpsline", "Ljava/lang/String;");
-	jobject obj = (*env)->AllocObject(env, clazz);
+	jstr = (*env)->GetObjectField(env, activity->clazz, fid);
-	if (!obj) {
-		d_printf ("error getting obj");
-		exit (1);
-	}
-
-	jstr = (*env)->GetObjectField(env, obj, fid);
 	str = (*env)->GetStringUTFChars(env, jstr, 0);
-	d_printf("  c.s = \"%s\"\n", str);
+//	d_printf ("str:%p", str);
+	if (str != NULL)
+		strncpy (ptr, str, ptrsize);
+	else ptr[0] = 0;
+	d_printf ("NMEA:%s", ptr);
 	(*env)->ReleaseStringUTFChars(env, jstr, str);
-	d_printf ("release string");
 
 	(*jvm)->DetachCurrentThread(jvm);
-
+	return strlen (ptr);
-	return -1;
 };

android/src/de/gulpe/sposmroute/spOSMrNActivity.java

@@ -1,28 +1,62 @@
 package de.gulpe.sposmroute;
 
 import android.app.NativeActivity;
-
+import android.location.Location;
+import android.location.LocationListener;
+import android.location.LocationManager;
 import android.os.Bundle;
 import android.util.Log;
-
+import android.content.Context;
+import android.location.GpsStatus.NmeaListener;
 
 public class spOSMrNActivity extends NativeActivity {
 	private static final String TAG = "spOSMroute Java"; 
 	spOSMrNActivity _activity;
 	String gpsline;
+	String nmealine;
+	private LocationManager mLocMan;
+	private LocationListener mLocListener;
 	int	i = 0;
 	
 	public void onCreate(Bundle savedInstanceState) {
+		mLocMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
+		mLocListener = new MyLocationListener();
+		mLocMan.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mLocListener);
+		mLocMan.addNmeaListener(new NmeaListener() {
+	        public void onNmeaReceived(long timestamp, String nmea) {
+	        	nmealine = nmea;
+	        }
+		});
+		
 		super.onCreate(savedInstanceState);
 		// Make your custom init here
 		_activity = this;
 	}
     
+
+  	private class MyLocationListener implements LocationListener {
+		@Override
+		public void onLocationChanged(Location loc) {
+		}
+
+		@Override
+		public void onProviderDisabled(String provider) {
+		}
+		
+		@Override
+		public void onProviderEnabled(String provider) {
+		}
+
+		@Override
+		public void onStatusChanged(String provider, int status, Bundle extras) {
+		}
+	}
+	
 	// get gps data fill one line into gpsline
 	public void GPSDataGetLine() {
-		i++;
-		gpsline = "Number: " + i;
 		Log.i(TAG, "GPSDataGetLine called");
+		gpsline = nmealine;
+		nmealine = "";
 	}
 
 	// start gps part