Implement tracking as background service in a separate process

mobile/com.sap.sailing.android.tracking.app/AndroidManifest.xml

@@ -2,7 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.sap.sailing.android.tracking.app"
     android:versionCode="1"
-    android:versionName="1 - Altitude">
+    android:versionName="1 - Altitude" >
 
     <uses-sdk
         android:minSdkVersion="13"
@@ -20,34 +20,36 @@
         android:icon="@drawable/sap_sailing_app_icon"
         android:label="@string/app_name"
         android:theme="@style/Theme.Welter" >
+        <meta-data
+            android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
 
-		<meta-data
-	        android:name="com.google.android.gms.version"
-	        android:value="@integer/google_play_services_version" />
-		
         <activity
             android:name=".ui.activities.LaunchActivity"
-            android:launchMode="standard"
-            android:finishOnTaskLaunch="true" >
+            android:finishOnTaskLaunch="true"
+            android:launchMode="standard" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        
-        <activity
-            android:name="com.sap.sailing.android.tracking.app.ui.activities.SystemInformationActivity">
+        <activity android:name="com.sap.sailing.android.tracking.app.ui.activities.SystemInformationActivity" >
         </activity>
-        
-        <activity
-            android:name="com.sap.sailing.android.tracking.app.ui.activities.SettingsActivity">
+        <activity android:name="com.sap.sailing.android.tracking.app.ui.activities.SettingsActivity" >
+        </activity>
+        <activity android:name="com.sap.sailing.android.tracking.app.ui.activities.StopTrackingActivity" >
         </activity>
 
         <service
             android:name="com.sap.sailing.android.tracking.app.services.TrackingService"
-            android:exported="false" >
+            android:exported="false" 
+            android:process=":tracking_process"
+            android:icon="@drawable/icon"
+            android:label="@string/tracking_service"
+            >
         </service>
-
+        
         <service
             android:name="com.sap.sailing.android.shared.services.sending.MessageSendingService"
             android:exported="false" >
@@ -56,6 +58,7 @@
                 <action android:name="com.sap.sailing.android.tracking.app.action.sendMessage" />
             </intent-filter>
         </service>
+ 
 
         <receiver android:name="com.sap.sailing.android.shared.services.sending.ConnectivityChangedReceiver" >
             <intent-filter>
@@ -64,4 +67,4 @@
         </receiver>
     </application>
 
-</manifest>
+</manifest>

mobile/com.sap.sailing.android.tracking.app/res/layout/launch_activity.xml

@@ -4,10 +4,16 @@
     android:layout_height="match_parent"
     android:orientation="vertical" >
 
-    <TextView
-        android:id="@+id/status"
+    <Button
+        android:id="@+id/btnStartTracking"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/not_tracking" />
+        android:text="@string/start_tracking" />
+
+    <Button
+        android:id="@+id/btnNextActivity"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/next_activity" />
 
 </LinearLayout>

mobile/com.sap.sailing.android.tracking.app/res/layout/stop_tracking_activity.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical" >
+
+    <Button
+        android:id="@+id/btnStopTracking"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/stop_tracking" />
+
+</LinearLayout>

mobile/com.sap.sailing.android.tracking.app/res/values/strings.xml

@@ -13,4 +13,12 @@
     <string name="device_identifier">Device Identifier</string>
     
     <string name="play_services_available">Google Play services is available</string>
+    
+    <string name="tracking_service">Tracking Service</string>
+    
+    <string name="stop_tracking">Stop Tracking</string>
+    
+    <string name="start_tracking">Start Tracking</string>
+    
+    <string name="next_activity">Next Activity</string>
 </resources>

mobile/com.sap.sailing.android.tracking.app/src/com/sap/sailing/android/tracking/app/services/TrackingService.java

@@ -5,7 +5,6 @@ import java.util.UUID;
 import android.app.Service;
 import android.content.Intent;
 import android.location.Location;
-import android.os.Binder;
 import android.os.Bundle;
 import android.os.IBinder;
 
@@ -23,6 +22,7 @@ import com.sap.sailing.android.tracking.app.nmea.NmeaGprmcBuilder;
 
 public class TrackingService extends Service implements ConnectionCallbacks, OnConnectionFailedListener,
 LocationListener {
+
     private LocationClient locationClient;
     private LocationRequest locationRequest;
     private boolean locationUpdateRequested = false;
@@ -44,22 +44,11 @@ LocationListener {
         
         locationClient = new LocationClient(this, this, this);
     }
-
-    /**
-     * Class for clients to access. Because we know this service always runs in the same process as its clients, we
-     * don't need to deal with IPC.
-     */
-    public class TrackingServiceBinder extends Binder {
-        public TrackingService getService() {
-            return TrackingService.this;
-        }
-    }
-
-    private final TrackingServiceBinder binder = new TrackingServiceBinder();
-
+    
     @Override
-    public IBinder onBind(Intent intent) {
-        return binder;
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        startTracking();
+        return Service.START_STICKY;
     }
 
     public void startTracking() {
@@ -108,4 +97,9 @@ LocationListener {
         ExLog.i(this, TAG, "Sent NMEA to server:" + nmea);
         //TODO also store to SD card
     }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
 }

mobile/com.sap.sailing.android.tracking.app/src/com/sap/sailing/android/tracking/app/ui/activities/LaunchActivity.java

@@ -1,76 +1,55 @@
 package com.sap.sailing.android.tracking.app.ui.activities;
 
 import android.app.Dialog;
-import android.content.ComponentName;
-import android.content.Context;
 import android.content.Intent;
-import android.content.ServiceConnection;
 import android.os.Bundle;
-import android.os.IBinder;
 import android.support.v4.app.DialogFragment;
-import android.widget.TextView;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
 
 import com.google.android.gms.common.ConnectionResult;
 import com.google.android.gms.common.GooglePlayServicesUtil;
 import com.sap.sailing.android.shared.logging.ExLog;
 import com.sap.sailing.android.tracking.app.R;
 import com.sap.sailing.android.tracking.app.services.TrackingService;
-import com.sap.sailing.android.tracking.app.services.TrackingService.TrackingServiceBinder;
 
 public class LaunchActivity extends BaseActivity {
     private static final String TAG = LaunchActivity.class.getName();
-
-    private final TrackingServiceConnection trackingServiceConnection = new TrackingServiceConnection();
-    private TrackingService trackingService;
-    private boolean boundTrackingService = false;
-    private TextView status;
-
-    private class TrackingServiceConnection implements ServiceConnection {
-        @Override
-        public void onServiceConnected(ComponentName className, IBinder service) {
-            TrackingServiceBinder binder = (TrackingServiceBinder) service;
-            trackingService = binder.getService();
-            trackingService.startTracking();
-            boundTrackingService = true;
-            status.setText(R.string.tracking);
-        }
-
-        @Override
-        public void onServiceDisconnected(ComponentName arg) {
-            boundTrackingService = false;
-        }
-    }
+    private Button startTracking;
+    private Button nextActivity;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.launch_activity);
-        status = (TextView) findViewById(R.id.status);
+
+        startTracking = (Button) findViewById(R.id.btnStartTracking);
+        startTracking.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (!googlePLayServicesAvailable()) {
+                    return;
+                }
+                
+                Intent startTracking = new Intent(LaunchActivity.this, TrackingService.class);
+                getBaseContext().startService(startTracking);
+            }
+        });
+
+        nextActivity = (Button) findViewById(R.id.btnNextActivity);
+        nextActivity.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(LaunchActivity.this, StopTrackingActivity.class);
+                fadeActivity(intent);
+            }
+        });
     }
 
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if (servicesConnected()){
-            bindService(new Intent(getApplicationContext(), TrackingService.class), trackingServiceConnection,
-                    Context.BIND_AUTO_CREATE);
-        }
-    }
+    private boolean googlePLayServicesAvailable() {
+        int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
 
-    @Override
-    protected void onPause() {
-        super.onPause();
-        if (boundTrackingService) {
-            trackingService.stopTracking();
-            status.setText(R.string.not_tracking);
-            unbindService(trackingServiceConnection);
-        }
-    }
-    
-    private boolean servicesConnected() {
-        int resultCode =
-                GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
-        
         if (ConnectionResult.SUCCESS == resultCode) {
             ExLog.i(this, TAG, getString(R.string.play_services_available));
             return true;
@@ -85,7 +64,7 @@ public class LaunchActivity extends BaseActivity {
             return false;
         }
     }
-    
+
     public static class ErrorDialogFragment extends DialogFragment {
         private Dialog dialog;
 
@@ -97,7 +76,8 @@ public class LaunchActivity extends BaseActivity {
         /**
          * Set the dialog to display
          *
-         * @param dialog An error dialog
+         * @param dialog
+         *            An error dialog
          */
         public void setDialog(Dialog dialog) {
             this.dialog = dialog;

mobile/com.sap.sailing.android.tracking.app/src/com/sap/sailing/android/tracking/app/ui/activities/StopTrackingActivity.java

@@ -0,0 +1,31 @@
+package com.sap.sailing.android.tracking.app.ui.activities;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+
+import com.sap.sailing.android.tracking.app.R;
+import com.sap.sailing.android.tracking.app.services.TrackingService;
+
+public class StopTrackingActivity extends BaseActivity {
+    
+    private Button stopTracking;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.stop_tracking_activity);        
+        stopTracking = (Button) findViewById(R.id.btnStopTracking);
+        stopTracking.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent stopTracking = new Intent(StopTrackingActivity.this, TrackingService.class);
+                getBaseContext().stopService(stopTracking);
+            }
+        });
+    }
+    
+    
+}