Added Gps tracker code - start stop service

Added gps locatation in android code, can start stop location
Can get location on UI.
Seprate comonent to get location

locationTrack/.gitignore

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+/build

locationTrack/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 27
+
+
+
+    defaultConfig {
+        applicationId "app.prior.lollipop"
+        minSdkVersion 15
+        targetSdkVersion 27
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    implementation 'com.android.support:appcompat-v7:27.0.2'
+    implementation 'com.android.support:design:27.0.2'
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation 'com.google.android.gms:play-services-location:11.8.0'
+}

locationTrack/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

locationTrack/src/androidTest/java/app/prior/tracker/ExampleInstrumentedTest.java

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+package app.prior.tracker;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("app.prior.lollipop", appContext.getPackageName());
+    }
+}

locationTrack/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="app.prior.tracker">
+
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name="app.prior.tracker.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name="app.prior.tracker.MyIntentService"
+            android:exported="false"></service>
+    </application>
+
+</manifest>

locationTrack/src/main/java/app/prior/tracker/LocationUpdatesComponent.java

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+package app.prior.tracker;
+
+import android.content.Context;
+import android.location.Location;
+import android.os.Looper;
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationCallback;
+import com.google.android.gms.location.LocationRequest;
+import com.google.android.gms.location.LocationResult;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+
+
+/**
+ * stand alone component for location updates
+ */
+public class LocationUpdatesComponent {
+
+    private static final String TAG = LocationUpdatesComponent.class.getSimpleName();
+
+    /**
+     * The desired interval for location updates. Inexact. Updates may be more or less frequent.
+     */
+    private static final long UPDATE_INTERVAL_IN_MILLISECONDS = 3 * 1000;
+
+    /**
+     * The fastest rate for active location updates. Updates will never be more frequent
+     * than this value.
+     */
+    private static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
+            UPDATE_INTERVAL_IN_MILLISECONDS / 2;
+
+    private LocationRequest mLocationRequest;
+
+    /**
+     * Provides access to the Fused Location Provider API.
+     */
+    private FusedLocationProviderClient mFusedLocationClient;
+
+    /**
+     * Callback for changes in location.
+     */
+    private LocationCallback mLocationCallback;
+
+    /**
+     * The current location.
+     */
+    private Location mLocation;
+
+    public ILocationProvider iLocationProvider;
+
+    public LocationUpdatesComponent(ILocationProvider iLocationProvider) {
+        this.iLocationProvider = iLocationProvider;
+    }
+
+    /**
+     * create first time to initialize the location components
+     *
+     * @param context
+     */
+    public void onCreate(Context context) {
+        Log.i(TAG, "created...............");
+        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(context);
+
+        mLocationCallback = new LocationCallback() {
+            @Override
+            public void onLocationResult(LocationResult locationResult) {
+                super.onLocationResult(locationResult);
+                Log.i(TAG, "onCreate...onLocationResult...............loc " + locationResult.getLastLocation());
+
+                onNewLocation(locationResult.getLastLocation());
+            }
+        };
+        // create location request
+        createLocationRequest();
+        // get last known location
+        getLastLocation();
+    }
+
+    /**
+     * start location updates
+     */
+    public void onStart() {
+        Log.i(TAG, "onStart ");
+        //hey request for location updates
+        requestLocationUpdates();
+    }
+
+    /**
+     * remove location updates
+     */
+    public void onStop() {
+        Log.i(TAG, "onStop....");
+        removeLocationUpdates();
+    }
+
+    /**
+     * Makes a request for location updates. Note that in this sample we merely log the
+     * {@link SecurityException}.
+     */
+    public void requestLocationUpdates() {
+        Log.i(TAG, "Requesting location updates");
+        try {
+            mFusedLocationClient.requestLocationUpdates(mLocationRequest,
+                    mLocationCallback, Looper.getMainLooper());
+        } catch (SecurityException unlikely) {
+            Log.e(TAG, "Lost location permission. Could not request updates. " + unlikely);
+        }
+    }
+
+    /**
+     * Removes location updates. Note that in this sample we merely log the
+     * {@link SecurityException}.
+     */
+    public void removeLocationUpdates() {
+        Log.i(TAG, "Removing location updates");
+        try {
+            mFusedLocationClient.removeLocationUpdates(mLocationCallback);
+//            Utils.setRequestingLocationUpdates(this, false);
+//            stopSelf();
+        } catch (SecurityException unlikely) {
+//            Utils.setRequestingLocationUpdates(this, true);
+            Log.e(TAG, "Lost location permission. Could not remove updates. " + unlikely);
+        }
+    }
+
+    /**
+     * get last location
+     */
+    private void getLastLocation() {
+        try {
+            mFusedLocationClient.getLastLocation()
+                    .addOnCompleteListener(new OnCompleteListener<Location>() {
+                        @Override
+                        public void onComplete(@NonNull Task<Location> task) {
+                            if (task.isSuccessful() && task.getResult() != null) {
+                                mLocation = task.getResult();
+                                Log.i(TAG, "getLastLocation " + mLocation);
+//                                Toast.makeText(getApplicationContext(), "" + mLocation, Toast.LENGTH_SHORT).show();
+                                onNewLocation(mLocation);
+                            } else {
+                                Log.w(TAG, "Failed to get location.");
+                            }
+                        }
+                    });
+        } catch (SecurityException unlikely) {
+            Log.e(TAG, "Lost location permission." + unlikely);
+        }
+    }
+
+    private void onNewLocation(Location location) {
+        Log.i(TAG, "New location: " + location);
+//        Toast.makeText(getApplicationContext(), "onNewLocation " + location, Toast.LENGTH_LONG).show();
+
+        mLocation = location;
+        if (this.iLocationProvider != null) {
+            this.iLocationProvider.onLocationUpdate(mLocation);
+        }
+    }
+
+    /**
+     * Sets the location request parameters.
+     */
+    private void createLocationRequest() {
+        mLocationRequest = new LocationRequest();
+        mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
+        mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
+        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
+    }
+
+    /**
+     * implements this interface to get call back of location changes
+     */
+    public interface ILocationProvider {
+        void onLocationUpdate(Location location);
+    }
+}