android - google map blank screen, programmatic added -

i have put google map service on console, , generate debug key.

i've debug it, mmap , mlocation both not null. can latitude , longitude successfully.

but map still blank.

please help.

sam

here layout xml:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#f2f5fa" tools:context=".locfm" > <!-- top bar component -->  <imageview     android:id="@+id/loc_topbar"     android:layout_width="match_parent"     android:layout_height="60dp"     android:layout_alignparenttop="true"     android:layout_alignparentleft="true"     android:background="@drawable/topbar" />    <textview     android:id="@+id/loc_title"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignbottom="@+id/loc_backbtn"     android:layout_centerhorizontal="true"     android:text="@string/loc_title"     android:textcolor="#171717"                   android:textsize="@dimen/title_font" />   <imageview     android:id="@+id/loc_backbtn"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentleft="true"     android:layout_marginleft="10dp"     android:layout_margintop="10dp"     android:src="@drawable/backbtn" />  <!-- body -->  <framelayout android:id="@+id/map_fragment"       android:layout_width="fill_parent"     android:layout_height="fill_parent"      android:layout_below="@+id/loc_topbar"     android:layout_above="@+id/loc_bottombar"     > <!-- put fragments dynamically --> </framelayout>    <!-- bottom bar component -->  <imageview      android:id="@+id/loc_bottombar"      android:layout_width="match_parent"      android:layout_height="60dp"      android:layout_alignparentbottom="true"      android:layout_alignparentleft="true"       android:background="@drawable/bottombar" />   <button      android:id="@+id/locbtn"      android:layout_width="@dimen/halfbutton_width"      android:layout_height="@dimen/halfbutton_height"      android:layout_aligntop="@+id/loc_bottombar"      android:layout_alignparentleft="true"      android:layout_margintop="@dimen/halfbutton_margintop"      android:background="@drawable/halfbutton_bg"      android:text="@string/button_loc"       android:textsize="@dimen/button_font"/>   <button      android:id="@+id/loc_nextbtn"      android:layout_width="@dimen/halfbutton_width"      android:layout_height="@dimen/halfbutton_height"      android:layout_aligntop="@+id/loc_bottombar"      android:layout_alignparentright="true"      android:layout_margintop="@dimen/halfbutton_margintop"      android:background="@drawable/halfbutton_bg"      android:text="@string/button_continue"       android:textsize="@dimen/button_font"/>   <imageview      android:id="@+id/nextimg"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_alignright="@+id/loc_nextbtn"      android:layout_aligntop="@+id/loc_nextbtn"      android:layout_marginright="@dimen/buttonicon_marginright"      android:layout_margintop="@dimen/buttonicon_margintop"      android:src="@drawable/next" />   <imageview      android:id="@+id/locimg"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_alignright="@+id/locbtn"      android:layout_aligntop="@+id/locbtn"      android:layout_marginright="@dimen/buttonicon_marginright"      android:layout_margintop="@dimen/buttonicon_margintop"      android:src="@drawable/location" />  </relativelayout> 

here manifest xml:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.map" android:versioncode="1" android:versionname="1.0" >  <uses-sdk     android:minsdkversion="7"     android:targetsdkversion="17" />  <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="android.permission.access_fine_location" /> <uses-permission android:name="android.permission.access_coarse_location" /> <uses-permission android:name="android.permission.call_phone" /> <uses-permission android:name="android.permission.receive_boot_completed" /> <uses-permission android:name="android.permission.access_coarse_location" > </uses-permission> <uses-permission android:name="android.permission.access_fine_location" > </uses-permission> <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="android.permission.access_network_state" > </uses-permission> <uses-permission android:name="android.permission.restart_packages" /> <uses-permission android:name="android.permission.read_phone_state" /> <uses-permission android:name="android.permission.wake_lock" /> <uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.change_wifi_state" /> <uses-permission android:name="android.permission.access_wifi_state" /> <uses-permission android:name="com.google.android.providers.gsf.permission.read_gservices"/>  <permission     android:name="com.example.map.permission.maps_receive"     android:protectionlevel="signature" />  <uses-permission android:name="com.example.map.permission.maps_receive" />  <uses-feature     android:glesversion="0x00020000"     android:required="true" />  <application     android:allowbackup="true"     android:icon="@drawable/logo_icon"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <meta-data         android:name="com.google.android.maps.v2.api_key"         android:value="my api key" />      <activity         android:name="com.example.map.locfm"         android:configchanges="orientation|keyboardhidden"         android:label="@string/app_name"         android:nohistory="true"         android:screenorientation="portrait"         android:theme="@android:style/theme.notitlebar.fullscreen" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> </application> 

java code:

package com.example.map;  import java.text.simpledateformat; import java.util.arraylist;  import java.util.date; import java.util.list; import java.util.timer; import java.util.timertask;  import android.app.alertdialog; import android.app.progressdialog; import android.app.alertdialog.builder; import android.content.dialoginterface; import android.location.criteria; import android.location.location; import android.location.locationmanager; import android.os.bundle; import android.os.handler; import android.os.message; import android.support.v4.app.fragmentactivity; import android.support.v4.app.fragmenttransaction; import android.support.v4.app.fragmentmanager; import android.view.view; import android.view.windowmanager; import android.view.view.onclicklistener; import android.widget.adapterview; import android.widget.arrayadapter; import android.widget.button; import android.widget.edittext; import android.widget.imageview; import android.widget.radiobutton; import android.widget.radiogroup; import android.widget.spinner; import android.widget.textview; import android.widget.toast; import android.widget.adapterview.onitemselectedlistener;  import com.google.android.gms.common.connectionresult; import com.google.android.gms.common.googleplayservicesclient.connectioncallbacks; import com.google.android.gms.common.googleplayservicesclient.onconnectionfailedlistener; import com.google.android.gms.location.locationclient; import com.google.android.gms.location.locationlistener; import com.google.android.gms.location.locationrequest; import com.google.android.gms.maps.cameraupdatefactory; import com.google.android.gms.maps.googlemap; import com.google.android.gms.maps.supportmapfragment; import com.google.android.gms.maps.uisettings; import com.google.android.gms.maps.model.latlng; import com.google.android.gms.maps.model.markeroptions;  public class locfm extends fragmentactivity implements onclicklistener,   connectioncallbacks, onconnectionfailedlistener, locationlistener { timer positiontimer; private googlemap mmap;      private location mlocation; private uisettings muisettings; private locationclient mlocationclient; private static supportmapfragment mmapview; private static final string map_fragment_tag = "map"; public fragmentmanager fmanager; double latitude, longitude, radius; string slat,slong,srange; boolean bmaploaded=false; int index =0; int positioncount=0; final int position_count_max=5; final int position_min=100; final int pssition_max_times=10;  onlinehistoryinfo onlinehistory;  progressdialog dialog;   private static final locationrequest request = locationrequest.create()       .setinterval(5000)         // 5 seconds       .setfastestinterval(16)    // 16ms = 60fps       .setpriority(locationrequest.priority_high_accuracy);    protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setlocfm();      } @override public void onlocationchanged(location location) {     if (mlocationclient != null && mlocationclient.isconnected())      {         mlocation=mlocationclient.getlastlocation();             }      if (mlocation!=null)     {         latitude= mlocation.getlatitude();          longitude= mlocation.getlongitude();              radius=mlocation.getaccuracy();          slat=double.tostring(latitude);         slong=double.tostring(longitude);         srange=double.tostring(radius);         latlng latlng = new latlng(latitude, longitude);         mmap.movecamera(cameraupdatefactory.newlatlng(latlng));          mmap.animatecamera(cameraupdatefactory.zoomto(15));          mmap.addmarker(new markeroptions().position(latlng).title(getstring(r.string.map_msg)));      }      positioncount++;     if(mlocationclient==null || radius<=position_min)     {         mlocationclient.disconnect();         positioncount=0;             button loc_nextbtn=(button)findviewbyid(r.id.loc_nextbtn);         loc_nextbtn.setonclicklistener(this);         loc_nextbtn.setvisibility(view.visible);          imageview nextimg=(imageview)findviewbyid(r.id.nextimg);         nextimg.setvisibility(view.visible);         showdialog(false,null);     }      if(positioncount>=position_count_max)     {         mlocationclient.disconnect();         positioncount=0;     } }  @override public void onconnectionfailed(connectionresult result) {     // todo auto-generated method stub  }  @override public void onconnected(bundle connectionhint) {     setupmapifneeded();         position(); }  @override public void ondisconnected() {     // todo auto-generated method stub  }  private void mapdestroy() {     if (mlocationclient != null)         mlocationclient.disconnect();     if(mmapview!=null){              fragmenttransaction ft = mmapview.getactivity().getsupportfragmentmanager().begintransaction();             ft.remove(mmapview);             ft.commit();     }     if(mmap!=null)     {         mmap=null;     }     bmaploaded=false; }  private void setupmapifneeded() {     // null check confirm have not instantiated map.   if (mmap == null) {     // try obtain map mapfragment.     mmap = mmapview.getmap();     // check if successful in obtaining map.     if (mmap != null) {       mmap.setmylocationenabled(true);     }   }  }    private void setuplocationclientifneeded() {    if (mlocationclient == null) {     mlocationclient = new locationclient(       this,       this,  // connectioncallbacks       this); // onconnectionfailedlistener   } } @override public void onclick(view v) {     switch (v.getid()) {     case r.id.loc_backbtn:         mapdestroy();         locfm.this.finish();             break;     case r.id.loc_nextbtn:         positioncount=0;         mapdestroy();         break;     case r.id.locbtn:         relocate();         break;     }  }  public void setlocfm(){         setcontentview(r.layout.loc_fm);          loadmapfragment();      imageview loc_backbtn=(imageview)findviewbyid(r.id.loc_backbtn);     loc_backbtn.setonclicklistener(this);      button loc_nextbtn=(button)findviewbyid(r.id.loc_nextbtn);     loc_nextbtn.setvisibility(view.gone);     imageview nextimg=(imageview)findviewbyid(r.id.nextimg);     nextimg.setvisibility(view.gone);      button locbtn=(button)findviewbyid(r.id.locbtn);     locbtn.setonclicklistener(this);      bmaploaded=true; }  private void loadmapfragment() {     showdialog(true,getstring(r.string.alert_postion));     // isn't possible set fragment's id programmatically set tag instead ,     // search using that.     mmapview = (supportmapfragment) getsupportfragmentmanager()             .findfragmentbytag(map_fragment_tag);      // create fragment if doesn't exist.    if (mmapview == null) {         // programmatically add map, first create supportmapfragment.         mmapview = supportmapfragment.newinstance();          // add using fragmenttransaction.         fragmenttransaction fragmenttransaction =                 getsupportfragmentmanager().begintransaction();         fragmenttransaction.add(r.id.map_fragment, mmapview, map_fragment_tag);         fragmenttransaction.commit();     }       setuplocationclientifneeded();     if (!mlocationclient.isconnected()) mlocationclient.connect(); }   private void position() {        showdialog(true,getstring(r.string.alert_postion));     if (mmap != null) {             mmap.setmaptype(googlemap.map_type_normal);         mmap.setmylocationenabled(true);         locationmanager locationmanager = (locationmanager) getsystemservice(location_service);         criteria criteria = new criteria();         criteria.setaccuracy(criteria.accuracy_fine);           criteria.setaltituderequired(false);           criteria.setbearingrequired(false);           criteria.setcostallowed(true);            criteria.setpowerrequirement(criteria.power_low);           string provider = locationmanager.getbestprovider(criteria, true);         mlocation = locationmanager.getlastknownlocation(provider);         muisettings = mmap.getuisettings();         muisettings.setcompassenabled(true);         muisettings.setmylocationbuttonenabled(false);         // check if successful in obtaining map.          mlocationclient.requestlocationupdates(request,this);  // locationlistener     }        }  public void relocate() {     if (!mlocationclient.isconnected()) mlocationclient.connect();     wswlog.i("relocate()"); }  /**  * @param dialgshow  */ public void showdialog(boolean dialgshow,final string message) {     wswlog.i(" showdialog ("+dialgshow+","+message+")");      if(dialgshow)     {         if(dialog==null)         {             dialog = new progressdialog(this);             dialog.setcancelable(false);//false              {                 dialog.setmessage(message);             }         }         else         {             dialog.setmessage(message);         }         dialog.show();          //         if(null != positiontimer)         {             positiontimer.cancel();          }         positiontimer= new timer(true);          timertask task = new timertask(){                  public void run() {                     handler.sendemptymessage(1);                 }            };          positiontimer.schedule(task,pssition_max_times*1000, pssition_max_times*1000);      }     else     {         if(null != positiontimer)         {             positiontimer.cancel();                      }          if(dialog!=null)         {             dialog.dismiss();         }     } }   private handler handler = new handler() {          @override         public void handlemessage(message msg) {             if(null != positiontimer)             {                 positiontimer.cancel();             }             showdialog(false,null);             //             alertnoposition();              super.handlemessage(msg);         }     };  /**  */ private void alertnoposition() {     alertdialog.builder builder = new builder(this);     builder.setmessage(getstring(r.string.loc_alert_realloc));          builder.settitle(getstring(r.string.button_loc));       builder.setnegativebutton(getstring(r.string.button_cancel), new dialoginterface.onclicklistener() {            public void onclick(dialoginterface dialog, int which) {             dialog.dismiss();                locfm.this.finish();         }     });       builder.setpositivebutton(getstring(r.string.button_ok), new dialoginterface.onclicklistener() {            public void onclick(dialoginterface dialog, int which) {             dialog.dismiss();             relocate();         }     });     builder.create().show(); } 

}

first check debug key whether using right one? second use following permission. remove repeated permission manifest.xml.

<permission     android:name="com.example.map.permission.maps_receive"     android:protectionlevel="signature" />  <uses-permission     android:name="com.example.map.permission.maps_receive"     android:required="false" /> <uses-permission     android:name="com.google.android.providers.gsf.permission.read_gservices"     android:required="false" /> 

use supportmap fragment instead of simple fragment

mmap = ((supportmapfragment) getsupportfragmentmanager().findfragmentbyid(r.id.mapview)).getmap(); 

follow simple tutorial may find usefull http://mobisys.in/blog/2012/12/google-rolls-out-android-maps-api-v2/

your code not clear...

try when showing lat-long on map. not find in code

mcurrentlattitude = mgpslistener.getlatituderaw();     mcurrentlongitude = mgpslistener.getlongituderaw();     latlng coordinates = new latlng(mcurrentlattitude, mcurrentlongitude);     log.d("map"," setcurrentlocation lat-lang values: "+mcurrentlattitude +" : "+mcurrentlongitude);     cameraupdate center= cameraupdatefactory.newlatlng(coordinates);     string lpreviouszoomlevelstring = config.getsetting(getapplicationcontext(), "mapzoomlevel");     mpreviouszoomlevel = float.parsefloat(lpreviouszoomlevelstring);     cameraupdate zoom=cameraupdatefactory.zoomto(mpreviouszoomlevel);     mmap.animatecamera(zoom);     cameraposition  = mmap.getcameraposition();            log.d("map"," after setting zoom 2 :"+i.zoom);     mmap.movecamera(center);