Maps in Android Wear

We can show maps in Android wear we display user current location recived from the phone.
Currently we can update user current location from phone only. So this maps on android wear will be helpful for user to see the locations near by when riding.


What is DismissOverlayView? Need to know this first.

In Android wear we Dismiss a screen or view by swiping from left to right. But When we are dealing with Maps in android wear then gestures are overiden by the map gestures so we are not able to perform the normal left to right swipe dismiss action in android wear in maps.

So in order to overcome there is DismissOverlayView which lets you dismiss the map screen view by just long press on the map screen and you will get a alert to quit with cross icon which allows you to dismiss the current screen in view.

And how can we show maps in android wear programmactically is shown below.

Project Structure will be as shown

1. MainActivity.java

public class MainActivity extends FragmentActivity implements OnMapReadyCallback,

        GoogleMap.OnMapLongClickListener,GoogleMap.OnMarkerDragListener {



    private GoogleApiClient mGoogleApiClient;

    private static final LatLng CHANDIGARH = new LatLng(30.7500, 76.7800);

    ArrayList<LatLng> points;

    float distance;

    private DismissOverlayView mDismissOverlay;

    private GoogleMap mMap;



    public void onCreate(Bundle savedState) {

        super.onCreate(savedState);

        setContentView(R.layout.activity_main);

        final FrameLayout topFrameLayout = (FrameLayout) findViewById(R.id.root_container);

        final FrameLayout mapFrameLayout = (FrameLayout) findViewById(R.id.map_container);

        topFrameLayout.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() {

            @Override

            public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {

                insets = topFrameLayout.onApplyWindowInsets(insets);

                FrameLayout.LayoutParams params =

                        (FrameLayout.LayoutParams) mapFrameLayout.getLayoutParams();

                params.setMargins(

                        insets.getSystemWindowInsetLeft(),

                        insets.getSystemWindowInsetTop(),

                        insets.getSystemWindowInsetRight(),

                        insets.getSystemWindowInsetBottom());

                mapFrameLayout.setLayoutParams(params);



                return insets;

            }

        });



        mDismissOverlay = (DismissOverlayView) findViewById(R.id.dismiss_overlay);

        mDismissOverlay.setIntroText(R.string.intro_text);

        mDismissOverlay.showIntroIfNecessary();

        SupportMapFragment mapFragment =

                (SupportMapFragment) getSupportFragmentManager()

                        .findFragmentById(R.id.map);

        mapFragment.getMapAsync(this);

    }



    @Override

    public void onMapReady(GoogleMap googleMap) {

        mMap = googleMap;

        mMap.setOnMapLongClickListener(this);

        MarkerOptions marker = new MarkerOptions()

                .position(CHANDIGARH)

                .title("Wear Maps")

                .snippet("" + CHANDIGARH)

                .icon(BitmapDescriptorFactory

                        .defaultMarker(BitmapDescriptorFactory.HUE_GREEN));

        mMap.addMarker(marker);

        mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {

            @Override

            public void onInfoWindowClick(Marker marker) {



            }

        });

        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(CHANDIGARH, 14));



    }



    @Override

    public void onMapLongClick(LatLng latLng) {

        mDismissOverlay.show();

    }



    @Override

    public void onMarkerDragEnd(Marker arg0) {

        LatLng dragPosition = arg0.getPosition();

        double dragLat = dragPosition.latitude;

        double dragLong = dragPosition.longitude;

        Log.i("info", "on drag end :" + dragLat + " dragLong :" + dragLong);

        PolylineOptions polylineOptions = new PolylineOptions();

        polylineOptions.color(Color.RED);

        polylineOptions.width(3);

        points.add(dragPosition);

        polylineOptions.addAll(points);

        mMap.addPolyline(polylineOptions);

        Toast.makeText(getApplicationContext(), "Distance ="+distance, Toast.LENGTH_LONG).show();

    }



    @Override

    public void onMarkerDragStart(Marker arg0) {

    }



    @Override

    public void onMarkerDrag(Marker marker) {

    }

}

2. activity_main.xml

<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:map="http://schemas.android.com/apk/res-auto"

    android:id="@+id/root_container"

    android:layout_height="match_parent"

    android:layout_width="match_parent">





    <FrameLayout

        android:id="@+id/map_container"

        android:layout_width="match_parent"

        android:layout_height="match_parent">



        <fragment

            android:id="@+id/map"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:name="com.google.android.gms.maps.SupportMapFragment"/>



    </FrameLayout>



    <android.support.wearable.view.DismissOverlayView

        android:id="@+id/dismiss_overlay"

        android:layout_height="match_parent"

        android:layout_width="match_parent"/>



</FrameLayout>

3.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.watchmaps.androidsmartwatchmaps" >



    <!-- Permissions and features required for the Android Maps API v2 -->

    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

    <uses-feature

        android:glEsVersion="0x00020000"

        android:required="true"/>



    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.DeviceDefault" >

        <!-- API key for the Android Maps API v2. The value is defined as a string resource. -->

        <meta-data android:name="com.google.android.geo.API_KEY"

            android:value="@string/google_maps_key"/>

        <!-- Meta data required for Google Play Services -->

        <meta-data

            android:name="com.google.android.gms.version"

            android:value="@integer/google_play_services_version" />

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>



</manifest>

4. build.gradle

apply plugin: 'com.android.application'



android {

    compileSdkVersion 22

    buildToolsVersion "22.0.1"



    defaultConfig {

        applicationId "com.watchmaps.androidsmartwatchmaps"

        minSdkVersion 20

        targetSdkVersion 22

        versionCode 1

        versionName "1.0"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}



dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile 'com.google.android.support:wearable:1.2.0'

    compile 'com.google.android.gms:play-services-wearable:7.5.0'

    compile 'com.google.android.gms:play-services-maps:7.5.0'

}

Happy coding
Cheers!!!


References : https://developers.google.com/maps/documentation/android/wear?hl=en