Latest Contributions by JohnAllen

So, apparently the way I have my callout set up the callout only works with the last ArcGIS feature layer that is added. So in my code above fLayer was added last, thus the callout worked for that layer. I switched it to have fLayer1 added last and the callout only worked that layer. How can I modify the callout to work on all three layers? ... View more

Update: To get the proper hyperlinks I needed in my apps callouts I had to make some changes. I changed my app to include both autoLink="" in XML and (Html.fromHtml()); in Java code. autoLink="" works well if you want to hyper link a phone number, email address, web site, all...ect. in a callout, but it doesn't read lat.long correctly. I needed the user to be able to select the Lat.Long in the callout and open Google Navigation. The autoLink="" in XML would not do this. So I had to combine/use autoLink="" in XML and (Html.fromHtml()); in Java code. autoLink="" in XML tries to make all numbers a phone number thus assigning my Lat./Long into a phone number hyperlink. When selected it would make it route the user to the dial pad with numbers (For example: 3445632 in phones dial pad). All-in-All the software isn't smart enough to look at lat.long and determine it needs to map it in Google. To fix this, I got rid of the StringBuilder with one TextView and made all TextViews to control each line of text in the callout from XML or Java code. Thus, being able to link certain text in different hyperlink "formats". Instead of making the lat.long. a hyperlink, I made another TextView and used a string called Directions. Directions string uses a web address of each facilities lat.long. (For Exmple: http://maps.google.com/?daddr=56.3546,34.322546) that is stored as an attribute column in my published layer. (See Image 1) When "Map It" hyperlink is selected Google Maps is opened via the Lat.Long webaddress: (Image 3) Basically I use ESRI API for the app, but use Google for navigation. XML Code: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/identifyCallout"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:clickable="true"     android:orientation="horizontal" >     <!-- Display field value -->     <RelativeLayout         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:clickable="true" >         <TextView             android:id="@+id/callout_content_textview0"             android:layout_width="wrap_content"             android:layout_height="wrap_content"                          android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview1"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/callout_content_textview0"            android:autoLink="phone"             android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview2"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/callout_content_textview1"                         android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview3"             android:layout_width="wrap_content"             android:layout_height="wrap_content"              android:layout_below="@id/callout_content_textview2"                        android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview4"             android:layout_width="wrap_content"             android:layout_height="wrap_content"               android:layout_below="@id/callout_content_textview3"                       android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview5"             android:layout_width="wrap_content"             android:layout_height="wrap_content"               android:layout_below="@id/callout_content_textview4"                       android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview6"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/callout_content_textview5"                                     android:paddingRight="5dp" />                 <TextView             android:id="@+id/callout_content_textview7"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/callout_content_textview6"               android:autoLink="web"                   android:paddingRight="5dp" />     </RelativeLayout>     <ImageView         android:id="@+id/callout_close_button"         android:layout_width="14dp"         android:layout_height="14dp"         android:layout_alignParentRight="true"         android:layout_alignParentTop="true"         android:clickable="true"         android:src="@drawable/b_close" /> </LinearLayout> Portion of Java Code: private void ShowCallout(Callout calloutView, Graphic graphic, Point mapPoint) {   // Get the values of attributes for the Graphic   String Name = (String) graphic.getAttributeValue("Name");   String Phone = (String) graphic.getAttributeValue("Phone");   String Type = (String) graphic.getAttributeValue("Type");   String Grade = (String) graphic.getAttributeValue("Grade");   String Directions = (String) graphic.getAttributeValue("LatLongWebLink");   String LatDegMinSec = (String) graphic.getAttributeValue("LatDegMinSec");   String LongDegMinSec = (String) graphic.getAttributeValue("LongDegMinSec");   String Website = (String) graphic.getAttributeValue("Website");    // Set callout properties   calloutView.setCoordinates(mapPoint);   calloutView.setStyle(m_calloutStyle);   calloutView.setMaxWidth(700);   calloutView.setMaxHeight(500);   TextView calloutTextLine0 = (TextView) findViewById(R.id.callout_content_textview0);       calloutTextLine0.setText("Name:" + " " + Name);     TextView calloutTextLine1 = (TextView) findViewById(R.id.callout_content_textview1);   calloutTextLine1.setMovementMethod(LinkMovementMethod.getInstance());   calloutTextLine1.setText("Phone:" + " " + Phone);     TextView calloutTextLine2 = (TextView) findViewById(R.id.callout_content_textview2);       calloutTextLine2.setText("Type:" + " " + Type);     TextView calloutTextLine3 = (TextView) findViewById(R.id.callout_content_textview3);       calloutTextLine3.setText("Grade:" + " " + Grade);     TextView calloutTextLine4 = (TextView) findViewById(R.id.callout_content_textview4);   calloutTextLine4.setMovementMethod(LinkMovementMethod.getInstance());   calloutTextLine4.setText(Html.fromHtml("Directions:" + " " + "<a href=\"" + Directions + "\">Map It</a>"));     TextView calloutTextLine5 = (TextView) findViewById(R.id.callout_content_textview5);       calloutTextLine5.setText("Latitude:" + " " + LatDegMinSec);     TextView calloutTextLine6 = (TextView) findViewById(R.id.callout_content_textview6);       calloutTextLine6.setText("Longitude:" + " " + LongDegMinSec);     TextView calloutTextLine7 = (TextView) findViewById(R.id.callout_content_textview7);   calloutTextLine7.setMovementMethod(LinkMovementMethod.getInstance());   calloutTextLine7.setText("Website:" + " " + Website);        calloutView.show(); }  ... 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Kenly, I ended up changing my application to not include closes facility option. Instead, I just let users select any facility on the map, from there, Google Navigation opens and navigate to the latitude and longitude of the facility location from the users location. If I do come across anything using closes facility I'll post it here. ... View more

Andrew thank you for the reply. I tried your way and kinda got it to work, and then I found another way of making the web site a hyper link. This is the website I found my information on: http://stackoverflow.com/questions/2734270/how-do-i-make-links-in-a-textview-clickable All I did was add: android:autoLink="web" android:clickable="true" to my callout TextView in XML layout file and it automatically understood I was using a website and added a hyper-link. You can also add (phone,map..ect): android:autoLink="web|phone" and it will let you click a phone number and direct your screen to the dialer. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/identifyCallout"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:clickable="true"     android:orientation="horizontal" >     <!-- Display field value -->     <RelativeLayout         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:clickable="true" >         <TextView             android:id="@+id/callout_content_textview"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:autoLink="web|phone"             android:clickable="true"             android:paddingRight="5dp" />     </RelativeLayout>     <ImageView         android:id="@+id/callout_close_button"         android:layout_width="14dp"         android:layout_height="14dp"         android:layout_alignParentRight="true"         android:layout_alignParentTop="true"         android:clickable="true"         android:src="@drawable/b_close" /> </LinearLayout> Now I'm working on making my latitude,longitude use Google navigation app when clicked. It's a little different. I'll post when I figure it out completely. ... View more

I got it to partially work, but still need to work out my logic a little. Java: final CheckBox Layeronoffcheckbox = (CheckBox) layout2.findViewById (R.id.checkBox1);     Layeronoffcheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {           @Override      public void onCheckedChanged(CompoundButton arg0, boolean isChecked) {            if (isChecked()){        fLayer.setVisible(true);       }       else{        fLayer.setVisible(false);       }            }          }); My logic is off because the check box should be checked when I open the alert dialog. Even if I tell the XML code to have it checked, it will stay checked every time I open the alert dialog even when I previously told it to turn off. but for now the checkbox on and off function works. ... View more

This crashes my app: Java: Mapscreen /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) {   // Initial activity content view. (START)   super.onCreate(savedInstanceState);   setContentView(R.layout.mapscreen);   // Retrieve the map layout and initial extent from mapscreen XML layout.   map = (MapView) findViewById(R.id.map);     // Add ESRI basemap layer to MapView.   map.addLayer(new ArcGISTiledMapServiceLayer("" +   "http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"));     // Add Facility Feature layer to the MapView   String URL = "http://PUT YOUR SERVER INFO HERE/ArcGIS/rest/services/Mobile/PUT YOUR MAP SERVICE HERE";   ArcGISFeatureLayer fLayer = new ArcGISFeatureLayer(URL, MODE.ONDEMAND);   map.addLayer(fLayer);   // This puts the ERSI logo on the bottom left corner of the screen once the map screen appears.   map.setEsriLogoVisible(true);                }         //Check Box Setup public void onCheckboxClicked(View view) {      // Is the view now checked?      boolean checked = ((CheckBox) view).isChecked();           // Check which checkbox was clicked      switch(view.getId()) {          case R.id.checkBox1:              if (checked)                fLayer.setVisible(true);              else                fLayer.setVisible(false);              break;             } } XML: mapscreen <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/app_frame"     android:layout_width="fill_parent"     android:layout_height="fill_parent" >     <com.esri.android.map.MapView         android:id="@+id/map"         android:layout_width="fill_parent"         android:layout_height="fill_parent"         initExtent="-9246560.42264577, 3775709.72082467, -8746857.60892366, 4180002.76740144" />     <ImageView         android:id="@+id/imageView1"         android:layout_width="77dp"         android:layout_height="54dp"         android:layout_alignParentBottom="true"         android:layout_alignParentRight="true"         android:src="@drawable/logo_white" />     <CheckBox         android:id="@+id/checkBox1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentBottom="true"         android:layout_centerHorizontal="true"         android:onClick="onCheckboxClicked"         android:text="WORK!!!!!" /> </RelativeLayout> ... View more

Has anybody else experienced this problem? Is this a problem or am I not doing something right? ... View more

Here is some of my java code: public class Mapscreen extends Activity { public MapView map; public boolean m_isMapLoaded;   //Callout Variables private int m_calloutStyle; private Callout m_callout; private ViewGroup calloutContent; private Graphic m_identifiedGraphic;   ArcGISFeatureLayer fLayer; ImageView CallOutClose; /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) {   // Initial activity content view. (START)   super.onCreate(savedInstanceState);   setContentView(R.layout.mapscreen);   // Retrieve the map layout and initial extent from mapscreen XML layout.   map = (MapView) findViewById(R.id.map);     // Add ESRI basemap layer to MapView.   map.addLayer(new ArcGISTiledMapServiceLayer("" +   "http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"));     // Add Feature layer to the MapView   String URL = "ADD YOUR MAP SERIVCE HERE";   ArcGISFeatureLayer fLayer = new ArcGISFeatureLayer(URL, MODE.ONDEMAND);   map.addLayer(fLayer);   // This puts the ERSI logo on the bottom left corner of the screen once the map screen appears. This is mandatory                 //  by ESRI.   map.setEsriLogoVisible(true);      LayoutInflater inflater = getLayoutInflater();   // Get the MapView's callout from xml->identify_calloutstyle.xml   m_calloutStyle = R.xml.facility_calloutstyle;   // Get the layout for the Callout from layout->identify_callout_content.xml   calloutContent = (ViewGroup) inflater.inflate(R.layout.facility_callout_content, null);      m_callout = map.getCallout();    m_callout.setContent(calloutContent);     // This initiates/starts the loading dialog when entering into map screen.   final ProgressDialog loadingDialog = new ProgressDialog(this);   loadingDialog.setMessage("Loading...");   loadingDialog.show();     // This initiates the listening process to see if the map loads.   map.setOnStatusChangedListener(new OnStatusChangedListener() {    private static final long serialVersionUID = 1L;    @Override    public void onStatusChanged(Object source, STATUS status) {     // Check to see if map has successfully loaded or Initialized.     if ((source == map) && (status == STATUS.INITIALIZED)) {      // If the map is loaded successfully set the flag to true and hide the loading dialog.      m_isMapLoaded = true;      loadingDialog.hide();     }     // Check to see if the map has unsuccessfully loaded or Initialization failed.     // Initialization failed typically results from no wireless connectivity.     if (OnStatusChangedListener.STATUS.INITIALIZATION_FAILED == status) {      // If the map did not load set the flag as false and hide the loading dialog.      m_isMapLoaded = false;      loadingDialog.hide();      // Because the map failed to load, the following toast will appear briefly with the following message.      Toast toast = Toast.makeText(Mapscreen.this,"Failed to load...Connection                                          Issue",Toast.LENGTH_LONG);      toast.setGravity(Gravity.CENTER, 0, 0);      toast.show();     }    }   });   //Callout Part - 1   map.setOnSingleTapListener(new OnSingleTapListener() {    private static final long serialVersionUID = 1L;    @Override    public void onSingleTap(float x, float y) {     if (m_isMapLoaded) {      // If map is initialized and Single tap is registered on screen identify the location selected      identifyLocation(x, y);     }    }   }); } // Initial activity content view. (END) //Callout Part - 2 /**   * Takes in the screen location of the point to identify the feature on map.   *   * @param x   *            x co-ordinate of point   * @param y   *            y co-ordinate of point   */ private void identifyLocation(float x, float y) {   // Hide the callout, if the callout from previous tap is still showing on map   if (m_callout.isShowing()) {    m_callout.hide();   }   // Find out if the user tapped on a feature   SearchForFeature(x, y);   // If the user tapped on a feature, then display information regarding the feature in the callout   if (m_identifiedGraphic != null) {    Point mapPoint = map.toMapPoint(x, y);    // Show Callout    ShowCallout(m_callout, m_identifiedGraphic, mapPoint);    //Close button for the callout is initiated here.    ImageView CallOutClose = (ImageView) findViewById(R.id.callout_close_button);    CallOutClose.setOnClickListener(new View.OnClickListener() {         @Override     public void onClick(View v) {      m_callout.hide();          }    });   } } //Callout Part - 3 /**   * Sets the value of m_identifiedGraphic to the Graphic present on the   * location of screen tap   *   * @param x   *            x co-ordinate of point   * @param y   *            y co-ordinate of point   */ private void SearchForFeature(float x, float y) {   Point mapPoint = map.toMapPoint(x, y);   if (mapPoint != null) {    for (Layer layer : map.getLayers()) {     if (layer == null)      continue;     if (layer instanceof ArcGISFeatureLayer) {      ArcGISFeatureLayer fLayer = (ArcGISFeatureLayer) layer;      // Get the Graphic at location x,y      m_identifiedGraphic = GetFeature(fLayer, x, y);     } else      continue;    }   } } //Callout Part - 4 /**   * Returns the Graphic present the location of screen tap   *   * @param fLayer   * @param x   *            x co-ordinate of point   * @param y   *            y co-ordinate of point   * @return Graphic at location x,y   */ private Graphic GetFeature(ArcGISFeatureLayer fLayer, float x, float y) {   // Get the graphics near the Point.   int[] ids = fLayer.getGraphicIDs(x, y, 10, 1);   if (ids == null || ids.length == 0) {    return null;   }   Graphic g = fLayer.getGraphic(ids[0]);   return g; } //Callout Part - 5 /**   * Shows the Attribute values for the Graphic in the Callout   *   * @param calloutView   * @param graphic   * @param mapPoint   */ private void ShowCallout(Callout calloutView, Graphic graphic, Point mapPoint) {   // Get the values of attributes for the Graphic   String Name = (String) graphic.getAttributeValue("Name");   String Phone = (String) graphic.getAttributeValue("Phone");    String LatDegMinSec = (String) graphic.getAttributeValue("LatDegMinSec");   String LongDegMinSec = (String) graphic.getAttributeValue("LongDegMinSec");   String Website = (String) graphic.getAttributeValue("Website");     // Set callout properties    calloutView.setCoordinates(mapPoint);    calloutView.setStyle(m_calloutStyle);    calloutView.setMaxWidth(700);    calloutView.setMaxHeight(500);   // Compose the string to display the results   StringBuilder FacilityCallout = new StringBuilder();    FacilityCallout.append("Facility:\t" + Name);   FacilityCallout.append("\nPhone:\t" + Phone);    FacilityCallout.append("\nLatitude:\t" + LatDegMinSec);   FacilityCallout.append("\nLongitude:\t" + LongDegMinSec);   FacilityCallout.append("\nWebsite:\t" + Website);   TextView calloutTextLine1 = (TextView) findViewById(R.id.callout_content_textview);   calloutTextLine1.setText(FacilityCallout);    calloutView.show(); } ... 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Follow up.... I figured it out with the help from a friend. FYI - The declared names of objects are a little different in the code below when compared to the code I previously posted above, but you should be able to follow. Work flow - Starting from the onPostExecute method: 1. If result is not null..."do something". 2. Create a Graphics Array and put the FeatureSet results in the Array. 3. Create/Initialize Alert Dialog Builder. 4. Set the Title for the Alert Dialog. 5. Create a String Array and declare the length of the Array, which is the length of the Graphics Array in step two above. 6. Create a loop that goes through each column of the graphic array. 7. Declare a Graphic object that is equal to the graphic array loop. 8. Create a String Array and put the graphics attribute values "Name" in the String Array as a string type. 9. Set the Alert Dialog items as that of the String Array, in this case "arr" & create a new Dialog Interface.OnClickListener 10. Create the Alert Dialog. 11. Show the Alert Dialog. The code below solves my problem stated in opening post: package com.dhec.MPOS; import com.esri.android.map.MapView; import com.esri.core.map.FeatureSet; import com.esri.core.map.Graphic; import com.esri.core.tasks.ags.query.Query; import com.esri.core.tasks.ags.query.QueryTask; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.AsyncTask; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; //MapScreen is a subclass of Activity. public class MapScreen extends Activity { public MapView map; /*   * Called when the Activity is first created. Remember the Activity and its   * methods are created first. Then the MapScreen class is used.   */ public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.mapscreen);   map = (MapView) findViewById(R.id.map); } public boolean onCreateOptionsMenu(Menu menu) {   MenuInflater inflater = getMenuInflater();   inflater.inflate(R.menu.actionbar_menu, menu);   return true; } public boolean onOptionsItemSelected(MenuItem item) {   switch (item.getItemId()) {   case R.id.SearchTool:    Query query = new Query();    query.setWhere("State = 'South Carolina'");    query.setReturnGeometry(true);    String[] outfields = new String[] { "Name" };    query.setOutFields(outfields);    query.setOutSpatialReference(map.getSpatialReference());    Query[] queryParams = { query };    AsyncQueryTask qt = new AsyncQueryTask();    qt.execute(queryParams);   }   return false; } private class AsyncQueryTask extends AsyncTask<Query, Void, FeatureSet> {   protected FeatureSet doInBackground(Query... params) {    if (params.length > 0) {     Query query = params[0];     QueryTask queryTask = new QueryTask(       "Put MAP SERVER URL HERE");     try {      FeatureSet fs = queryTask.execute(query);      return fs;     } catch (Exception e) {      e.printStackTrace();      return null;     }    }    return null;   }   protected void onPostExecute(FeatureSet result) {    if (result != null) {         Graphic[] graphics = result.getGraphics();     AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MapScreen.this);     dialogBuilder.setTitle("Select a Location:");     String[] arr = new String[graphics.length];        for (int i = 0; i < graphics.length; i++) {      Graphic g = graphics;      arr = (String) g.getAttributeValue("Name");     }         dialogBuilder.setItems(arr, new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog,int which) {         //This is where you tell the application to do something once you click         //the name within the alert dialog.        }       });     AlertDialog alertDialog = dialogBuilder.create();     alertDialog.show();    }   } } } Thomas, thanks for giving me information. Hope this helps others. ... View more

See my thread: " Populate AlertDialog from Webservice layer? " for an answer to this post. ... View more

Ok, I finally got something to work. (Image3) I can return only one location name: Anchor Marina I need to return all the location names not just one. I've tried looping through the graphic array, but I couldn't get all my name values to return. If someone could give me some pointers to have all my graphic names to appear I would appreciate it. Thanks, Here's my onPostExecute for only one location to appear: protected void onPostExecute(FeatureSet result) {         if (result != null) {         Graphic[] graphics = result.getGraphics();         gl.addGraphics(graphics);       Graphic g = graphics[0];     String location1 = (String) g.getAttributeValue("Name");               AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MapScreen.this);     String[] location2 = {location1};     dialogBuilder.setTitle("Select a Location:");     dialogBuilder.setItems(location2, new DialogInterface.OnClickListener() {            @Override        public void onClick(DialogInterface dialog, int which) {         // Do something once clicked        }       });        AlertDialog alertDialog = dialogBuilder.create();         alertDialog.show();     }      } ... View more

I've tried everything. I can't get it to work. My Alertdialog will not populate with the names of locations, from the Name field, from my layer, within a map service. What am I doing wrong SPECIFICALLY? FYI - I've referred to the query example. Any help is appreciated. Thanks, This is my new code: package com.dhec.MPOS; import com.esri.android.map.MapView; import com.esri.core.geometry.Envelope; import com.esri.core.geometry.SpatialReference; import com.esri.core.map.FeatureSet; import com.esri.core.map.Graphic; import com.esri.core.tasks.ags.query.Query; import com.esri.core.tasks.ags.query.QueryTask; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.AsyncTask; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.widget.Toast; //MapScreen is a subclass of Activity. public class MapScreen extends Activity { public MapView map; String targetServerURL = "MAP SERVER HERE"; /*   * Called when the Activity is first created. Remember the Activity and its   * methods are created first. Then the MapScreen class is used.   */ public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.mapscreen);   map = (MapView) findViewById(R.id.map); } public boolean onCreateOptionsMenu(Menu menu) {   MenuInflater inflater = getMenuInflater();   inflater.inflate(R.menu.actionbar_menu, menu);   return true; } public boolean onOptionsItemSelected(MenuItem item) {   switch (item.getItemId()) {   case R.id.SearchTool:    String targetLayer = targetServerURL;    String[] queryParams = { targetLayer, "Name" };    AsyncQueryTask ayncQuery = new AsyncQueryTask();    ayncQuery.execute(queryParams);   }   return false; } private class AsyncQueryTask extends AsyncTask<String, Void, FeatureSet> {   /**    * First member in parameter array is the query URL; second member is    * the where clause.    */   protected FeatureSet doInBackground(String... queryParams) {    if (queryParams == null || queryParams.length <= 1)     return null;    String url = queryParams[0];    Query query = new Query();    String whereClause = queryParams[1];    query.setOutFields(queryParams);    SpatialReference sr = SpatialReference.create(4326);    query.setGeometry(new Envelope(-9246560.42264577, 3775709.72082467,      -8746857.60892366, 4180002.76740144));    query.setOutSpatialReference(sr);    query.setReturnGeometry(true);    query.setWhere(whereClause);    QueryTask qTask = new QueryTask(url);    FeatureSet fs = null;    try {     fs = qTask.execute(query);    } catch (Exception e) {     // TODO Auto-generated catch block     e.printStackTrace();     return fs;    }    return fs;   }   protected void onPostExecute(FeatureSet result) {    Object location1 = null;      String message = "No result comes back";       Graphic[] grs = result.getGraphics();    if (result != null && grs.length > 0){              for (int i = 0; i <= grs.length; i++) {     Graphic g = grs;     location1 = g.getAttributeValue("Name");           }            AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MapScreen.this);    String[] location2 = { location1.toString() };    dialogBuilder.setTitle("Select a Location:");    dialogBuilder.setItems(marinas, new DialogInterface.OnClickListener() {       @Override       public void onClick(DialogInterface dialog, int which) {        // Do something once clicked       }      });    AlertDialog alertDialog = dialogBuilder.create();    alertDialog.show();          }    else{     Toast toast = Toast.makeText(MapScreen.this, message,       Toast.LENGTH_LONG);     toast.show();        }   } } } This is my log cat: 04-09 13:36:09.895: W/dalvikvm(15894): threadid=1: thread exiting with uncaught exception (group=0x40ab3210) 04-09 13:36:09.902: E/AndroidRuntime(15894): FATAL EXCEPTION: main 04-09 13:36:09.902: E/AndroidRuntime(15894): java.lang.ArrayIndexOutOfBoundsException: length=0; index=0 04-09 13:36:09.902: E/AndroidRuntime(15894):  at com.dhec.MPOS.MapScreen$AsyncQueryTask.onPostExecute(MapScreen.java:98) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at com.dhec.MPOS.MapScreen$AsyncQueryTask.onPostExecute(MapScreen.java:1) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.os.AsyncTask.finish(AsyncTask.java:602) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.os.AsyncTask.access$600(AsyncTask.java:156) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.os.Handler.dispatchMessage(Handler.java:99) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.os.Looper.loop(Looper.java:137) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at android.app.ActivityThread.main(ActivityThread.java:4722) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at java.lang.reflect.Method.invokeNative(Native Method) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at java.lang.reflect.Method.invoke(Method.java:511) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) 04-09 13:36:09.902: E/AndroidRuntime(15894):  at dalvik.system.NativeStart.main(Native Method) ... 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