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POadding Geopoints to ItemizedOverlay array failed
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  1. POadding Geopoints to ItemizedOverlay array failed
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    copied!<p>I've been trying to add my GeoPoints to the itemizedOverlay Array in order to draw the points on the map. Unfortunately, the app crashing at this point. </p> <p>My Code: package com.example.phooogle;</p> <pre><code>public class GoogleMapsAppActivity extends MapActivity { private MapView mapView; private MapController mc; private MyLocationOverlay myLocationOverlay; private myMapService mms; String[] ms; private LocationManager lm; private LocationListener locationListener; private MyLocationOverlay myLocOverlay; GeoPoint p; GeoPoint progress1[]; List&lt;GeoPoint&gt; geoPointsArray = new ArrayList&lt;GeoPoint&gt;(); int latitude; int longitude; private ProgressDialog progress; MotionEvent event; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_cool_map); progress= new ProgressDialog(this); progress.setIndeterminate(true); progress.setMessage("I am thinking"); InitTask init_task= new InitTask(); init_task.execute("144.963620993985", "-37.8140023779914", "20", "Litter Bin"); try { String[] arrs = init_task.strArr2; //Log.d(" print points", " Array Size " + arrs.length); Drawable makerDefault = this.getResources().getDrawable(R.drawable.poke); MirItemizedOverlay itemizedOverlay = new MirItemizedOverlay(makerDefault); for(int j=0; j&lt;arrs.length ;j++) { double y =0; double x =0; if(j == 1) { /// x //Log.d("Results", "2If statem " + strArr2[j] ); x = Double.parseDouble(arrs[j]); y = Double.parseDouble(arrs[j+1]); //Log.d(" print points", "lat " + x + " long" + y); itemizedOverlay.addOverlayItem((int) x , (int) y , "La trobe"); mapView.getOverlays().add(itemizedOverlay ); } } MapController mc = mapView.getController(); mc.setCenter(new GeoPoint((int) (1E6 * -37.720754), (int) (1E6 * 145.048798))); // Some where . mc.zoomToSpan(itemizedOverlay.getLatSpanE6(), itemizedOverlay.getLonSpanE6()); } finally {} initMap(); initMyLocation(); // theRouteDraw(); /* Drawable makerDefault = this.getResources().getDrawable(R.drawable.poke); MirItemizedOverlay itemizedOverlay = new MirItemizedOverlay(makerDefault); itemizedOverlay.addOverlayItem(init_task.geoPointsArray, "La trobe"); mapView.getOverlays().add(itemizedOverlay ); MapController mc = mapView.getController(); mc.setCenter(new GeoPoint((int) (1E6 * -37.720754), (int) (1E6 * 145.048798))); // Some where . mc.zoomToSpan(itemizedOverlay.getLatSpanE6(), itemizedOverlay.getLonSpanE6()); for (int i = 0; i &lt; geoPointsArray.size() ; i++) { Log.d(" print points", " points " + geoPointsArray.get(i)); }*/ // Log.d(" print points", " Size " + init_task.geoPointsArray.size()); /* mapView = (MapView) findViewById(R.id.mapview); List&lt;Overlay&gt; mapOverlays = mapView.getOverlays(); //add any icon here for the marker Drawable drawable = GoogleMapsAppActivity.this.getResources().getDrawable(R.drawable.poke); MapViewItemizedOverlay itemizedOverlay = new MapViewItemizedOverlay(drawable,this); //use your array here instead //GeoPoint point1 = new GeoPoint(lat,lng); OverlayItem overlayitem1 = new OverlayItem(point1, "Info", "You are here!" ); itemizedOverlay.addOverlay(overlayitem1); mapOverlays.add(itemizedOverlay); */ } private void initMap() { mapView = (MapView) findViewById(R.id.mapview); mapView.setBuiltInZoomControls(true); // mapView.setStreetView(true); mc = mapView.getController(); } public void theRouteDraw(GeoPoint p){ mc.animateTo(p); mc.setZoom(13); mapView.invalidate(); mapView.setSatellite(true); } private void initMyLocation() { myLocOverlay = new MyLocationOverlay(this, mapView); myLocOverlay.enableMyLocation(); mapView.getOverlays().add(new myLocOverlay()); } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } class myLocOverlay extends Overlay{ public void draw(Canvas canvas, MapView mapv, boolean shadow){ super.draw(canvas, mapv, shadow); Projection projection = mapView.getProjection(); Path p1 = new Path(); for (int i = 0; i &lt; geoPointsArray.size(); i++) { if (i == geoPointsArray.size() - 1) { break; } Point from = new Point(); Point to = new Point(); projection.toPixels(geoPointsArray.get(i), from); projection.toPixels(geoPointsArray.get(i + 1), to); p1.moveTo(from.x, from.y); p1.lineTo(to.x, to.y); } Paint mPaint = new Paint(); mPaint.setStyle(Style.STROKE); mPaint.setColor(Color.BLACK); mPaint.setAntiAlias(true); mPaint.setStrokeWidth(4); canvas.drawPath(p1, mPaint); super.draw(canvas, mapView, shadow); } } private class InitTask extends AsyncTask&lt;String, GeoPoint, List&lt;GeoPoint&gt;&gt; { List&lt;GeoPoint&gt; geoPointsArray = new ArrayList&lt;GeoPoint&gt;(); GeoPoint p; private ProgressDialog progressDialog; private String rst = " " ; private String[] strArr1; private String[] strArr2; protected void onPreExecute() { //progress.show(); } @Override protected List&lt;GeoPoint&gt; doInBackground(String... arg0) { String result = ""; int responseCode = 0; int executeCount = 0; HttpResponse response; StringBuilder sb = new StringBuilder(); String line; try { HttpClient client = new DefaultHttpClient(); HttpGet httppost = new HttpGet("http://xxxx/ccvo/mel-asset-data/query.php?lon="+ arg0[0].toString() + "&amp;lat="+ arg0[1].toString() +"&amp;within=" + arg0[2].toString() + "&amp;keyword="+ arg0[3].toString().replace(" ", "%20")); do { // progressDialog.setMessage("Passing paratmeters.. ("+(executeCount+1)+"/5)"); // Execute HTTP Post Request executeCount++; response = client.execute(httppost); responseCode = response.getStatusLine().getStatusCode(); } while (executeCount &lt; 5 &amp;&amp; responseCode == 408); BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); while ((line = rd.readLine()) != null) { result = line.trim(); sb.append(line); } }catch (Exception e2) { responseCode = 408; e2.printStackTrace(); } rst = result.toString(); // splits everything if(rst != null &amp;&amp; rst.length() &gt; 0) { strArr1 = rst.split("\\|"); for(int i=0;i&lt;strArr1.length;i++) { // Log.d("Results", "Array size1.1 " + i); Log.v("Results", "Array split1.2 " + strArr1[i] ); if(strArr1[i] != null &amp;&amp; strArr1[i].length() &gt;0 &amp;&amp; strArr1[i].contains(",")) { strArr2 = strArr1[i].split(","); for(int j=0; j&lt;strArr2.length ;j++) { double y =0; double x =0; if(j == 1) { /// x //Log.d("Results", "2If statem " + strArr2[j] ); x = Double.parseDouble(strArr2[j]); y = Double.parseDouble(strArr2[j+1]); geoPointsArray.add(new GeoPoint((int)(x*1e6), (int)(y*1e6))); Log.d("geoPointsArray", "geoPointsArray " + geoPointsArray.toString() ); } } } } } return geoPointsArray; } @Override protected void onProgressUpdate(GeoPoint... progress1) { theRouteDraw(progress1[0]); geoPointsArray.add(progress1[0]); int lon=progress1[0].getLongitudeE6(); int lat=progress1[0].getLatitudeE6(); GeoPoint p2=new GeoPoint(lon,lat); geoPointsArray.add(p2); initMyLocation(); } @Override protected void onPostExecute(List&lt;GeoPoint&gt; geoPointsArray) { //super.onPostExecute(geoPointsArray); progress.dismiss(); //startActivity(i); //i.getCharExtra("Geop", geoPointsArray); Log.d("Lista", " check " + geoPointsArray.size()); // theRouteDraw(geoPointsArray); } } } </code></pre> <p>My MirItemizedOverlay Class: </p> <pre><code>class MirItemizedOverlay extends ItemizedOverlay { private List&lt;OverlayItem&gt; mOverlays = new ArrayList&lt;OverlayItem&gt;(); public MirItemizedOverlay(Drawable defaultMarker) { super(boundCenterBottom(defaultMarker)); // TODO Auto-generated constructor stub } @Override protected OverlayItem createItem(int i) { return mOverlays.get(i); } @Override public int size() { return mOverlays.size(); } public void addOverlayItem(OverlayItem overlayItem) { mOverlays.add(overlayItem); populate(); } @Override public boolean onTouchEvent(MotionEvent event, MapView mapView) { //---when user lifts his finger--- if (event.getAction() == 1) { GeoPoint p = mapView.getProjection().fromPixels( (int) event.getX(), (int) event.getY()); Toast.makeText(getBaseContext(), p.getLatitudeE6() / 1E6 + "," + p.getLongitudeE6() /1E6 , Toast.LENGTH_SHORT).show(); } return false; } private Context getBaseContext() { // TODO Auto-generated method stub return null; } public void addOverlayItem(int lat, int lon, String title) { GeoPoint point = new GeoPoint(lat, lon); OverlayItem overlayItem = new OverlayItem(point, title, null); addOverlayItem(overlayItem); } /* public void addOverlayItem(GeoPoint point , String title) { OverlayItem overlayItem = new OverlayItem(point, title, null); addOverlayItem(overlayItem); //GeoPoint point = new GeoPoint(lat, lon); }*/ } </code></pre> <p>The error : </p> <pre><code>: E/AndroidRuntime(2752): FATAL EXCEPTION: main : E/AndroidRuntime(2752): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.phooogle/com.example.phooogle.GoogleMapsAppActivity}: java.lang.NullPointerException : E/AndroidRuntime(2752): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) : E/AndroidRuntime(2752): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) : E/AndroidRuntime(2752): at android.app.ActivityThread.access$600(ActivityThread.java:130) : E/AndroidRuntime(2752): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) : E/AndroidRuntime(2752): at android.os.Handler.dispatchMessage(Handler.java:99) : E/AndroidRuntime(2752): at android.os.Looper.loop(Looper.java:137) : E/AndroidRuntime(2752): at android.app.ActivityThread.main(ActivityThread.java:4745) : E/AndroidRuntime(2752): at java.lang.reflect.Method.invokeNative(Native Method) : E/AndroidRuntime(2752): at java.lang.reflect.Method.invoke(Method.java:511) : E/AndroidRuntime(2752): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) : E/AndroidRuntime(2752): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) : E/AndroidRuntime(2752): at dalvik.system.NativeStart.main(Native Method) : E/AndroidRuntime(2752): Caused by: java.lang.NullPointerException : E/AndroidRuntime(2752): at com.example.phooogle.GoogleMapsAppActivity.onCreate(GoogleMapsAppActivity.java:68) </code></pre> <p>I've tried several ways to do like I tried to change the addOverlayItem method to accept the GeoPoitns from the AsyncTask return but also failed. I almost gave me on this. :)</p> <p><strong>Update</strong> The problem resolved. Here is the fix:</p> <pre><code>try { //String[] arrs = init_task.strArr2; List&lt;GeoPoint&gt; geoL = init_task.get(); //Log.d(" Get the size " , " Geo List " + geoL.get(1).toString()); mapView = (MapView) findViewById(R.id.mapview); mapView.setBuiltInZoomControls(true); mc = mapView.getController(); List&lt;Overlay&gt; listOfOverlays = mapView.getOverlays(); Drawable drawable = this.getResources().getDrawable(R.drawable.poke); MyItemizedOverlay itemizedoverlay = new MyItemizedOverlay(drawable, this); for ( int i = 0; i &lt; geoL.size() ; i++) { OverlayItem overlayitem1 = new OverlayItem(geoL.get(i), Selectedword + "s found! " , "It's withing " + selectedDistance + " To your position"); itemizedoverlay.addOverlay(overlayitem1); listOfOverlays.add(itemizedoverlay); } //mc.animateTo(geoL.get(1)); mc.setCenter(new GeoPoint((int) (1E6 * gps.getLatitude() ), (int) (1E6 * gps.getLongitude() ))); // Some where . } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } finally {} initMap(); initMyLocation(); // theRouteDraw(); </code></pre>
 

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