play services

Author: hussienalrubaye

GooglePlayServices.java

@@ -0,0 +1,73 @@
+  public class GooglePlayServices
+            implements GoogleApiClient.ConnectionCallbacks,
+            GoogleApiClient.OnConnectionFailedListener 
+    {
+            private final String TAG = "GooglePlayServices:";
+        protected GoogleApiClient mGoogleApiClient;
+         
+        Context context;
+        public GooglePlayServices(  Context context) {
+            this.context=context;
+           
+            // build the Play Services client object
+            mGoogleApiClient = new GoogleApiClient.Builder(context)
+                    .addConnectionCallbacks(this)
+                    .addOnConnectionFailedListener(this)
+                    .addApi(LocationServices.API)
+                    .build();
+         
+       
+        }
+
+ @Override
+    protected void onStart() {
+        super.onStart();
+        Log.i(TAG, "onStart: Connecting to Google Play Services");
+
+        // Connect to Play Services
+        GoogleApiAvailability gAPI = GoogleApiAvailability.getInstance();
+        int resultCode = gAPI.isGooglePlayServicesAvailable(this);
+        if (resultCode != ConnectionResult.SUCCESS) {
+            gAPI.getErrorDialog(this, resultCode, 1).show();
+        }
+        else {
+            mGoogleApiClient.connect();
+        }
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        if (mGoogleApiClient.isConnected()) {
+            Log.i(TAG, "onStop: Disconnecting from Google Play Services");
+            mGoogleApiClient.disconnect();
+        }
+    }
+        /**
+         * Google Play Services Lifecycle methods
+         */
+        @Override
+        public void onConnected(Bundle connectionHint) {
+         Log.i(TAG, "onConnected: Is connected to Google Play Services");
+           //TODO: we connected
+ 
+        }
+
+        @Override
+        public void onConnectionFailed(ConnectionResult result) {
+            //error result
+            Log.d(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + result.getErrorCode());
+        }
+
+        @Override
+        public void onConnectionSuspended(int cause) {
+            Log.d(TAG, "Connection was suspended for some reason");
+            mGoogleApiClient.connect(); //reconnected
+        }
+ 
+ 
+
+    }
+
+    //TODO: Add play services in Grade
+    //compile 'com.google.android.gms:play-services:Version'

MyTracker/app/src/main/java/com/alrubaye/mytracker/MapsActivity.java

@@ -4,6 +4,7 @@
 import android.provider.ContactsContract;
 import android.support.v4.app.FragmentActivity;
 import android.os.Bundle;
+import android.view.KeyEvent;
 
 import com.google.android.gms.maps.CameraUpdateFactory;
 import com.google.android.gms.maps.GoogleMap;
@@ -25,24 +26,26 @@ public class MapsActivity extends FragmentActivity implements OnMapReadyCallback
 
     private GoogleMap mMap;
     DatabaseReference databaseReference;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_maps);
-        databaseReference= FirebaseDatabase.getInstance().getReference();
         Bundle b=getIntent().getExtras();
+        databaseReference= FirebaseDatabase.getInstance().getReference();
         LoadLocation(b.getString("PhoneNumber"));
 
     }
 
     void  LoadLocation(String PhoneNumber){
+
         databaseReference.child("Users").child(PhoneNumber).
                 child("Location").addValueEventListener(new ValueEventListener() {
             @Override
             public void onDataChange(DataSnapshot dataSnapshot) {
 
                 Map<String, Object> td = (HashMap<String, Object>) dataSnapshot.getValue();
-
+                if (td==null)return;
                 double lat = Double.parseDouble(td.get("lat").toString());
                 double lag = Double.parseDouble(td.get("lag").toString());
                 /** Make sure that the map has been initialised **/
@@ -89,4 +92,9 @@ public void onMapReady(GoogleMap googleMap) {
         mMap.addMarker(new MarkerOptions().position(sydney).title("last online:"+ LastDateOnline));
         mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney,15));
     }
+
+
+
+
+
 }