Customize Top Banner Panel

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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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    android:layout_width="match_parent"
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    android:layout_height="match_parent"
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    android:orientation="vertical"
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    android:padding="10dp">
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    <LinearLayout
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        android:layout_width="wrap_content"
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        android:orientation="vertical"
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        android:layout_height="wrap_content">
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        <Button
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            android:id="@+id/fetchRoute"
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            android:layout_width="wrap_content"
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            android:layout_height="wrap_content"
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            android:textSize="12sp"
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            android:text="@string/fetch_route"/>
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        <Button
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            android:id="@+id/startNav"
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            android:layout_width="wrap_content"
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            android:layout_height="wrap_content"
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            android:textSize="12sp"
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            android:text="@string/start_navigation_with_custom_top_panel"/>
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    </LinearLayout>
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    <TextView
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        android:id="@+id/routeGeometry"
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        android:layout_width="wrap_content"
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        android:layout_height="wrap_content"
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        android:layout_marginTop="10dp"/>
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    <ProgressBar
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        android:id="@+id/progress"
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        android:visibility="gone"
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        android:layout_width="wrap_content"
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        android:layout_height="wrap_content"
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        android:layout_gravity="center"/>
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</LinearLayout>

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<style name="Theme.CustomNavTopBannerPanel" parent="NavigationViewLight">
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        <!-- You can customise your navigation style here-->
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        <item name="navViewBannerBackground">#FFC84E0D</item>
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        <item name="navViewBannerPrimaryText">#FF9E10FF</item>
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        <item name="navViewBannerSecondaryText">#FFFA8C1C</item>
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        <item name="navViewBannerManeuverPrimary">#FF4E2EFF</item>
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</style>
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<style name="Theme.CustomNavTopBannerPanelDark" parent="NavigationViewDark">
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        <!-- You can customise your navigation style here-->
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        <item name="navViewBannerBackground">#FFC84E0D</item>
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        <item name="navViewBannerPrimaryText">#FF9E10FF</item>
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        <item name="navViewBannerSecondaryText">#FFFA8C1C</item>
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        <item name="navViewBannerManeuverPrimary">#FF4E2EFF</item>
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</style>

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package ai.nextbillion.navigation.demo.activity;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.ProgressBar;
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import android.widget.TextView;
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import ai.nextbillion.kits.directions.models.DirectionsResponse;
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import ai.nextbillion.kits.directions.models.DirectionsRoute;
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import ai.nextbillion.kits.geojson.Point;
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import ai.nextbillion.maps.location.modes.RenderMode;
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import ai.nextbillion.navigation.core.navigation.NavigationConstants;
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import ai.nextbillion.navigation.demo.R;
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import ai.nextbillion.navigation.ui.NBNavigation;
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import ai.nextbillion.navigation.ui.NavLauncherConfig;
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import ai.nextbillion.navigation.ui.NavigationLauncher;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import retrofit2.Call;
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import retrofit2.Callback;
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import retrofit2.Response;
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public class CustomTopBannerPanelStyleActivity extends AppCompatActivity implements View.OnClickListener {
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    private Button fetchRoute;
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    private Button startNav;
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    private TextView routeGeometry;
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    private DirectionsRoute directionsRoute;
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    private ProgressBar progress;
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.activity_custom_top_banner_panel);
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        fetchRoute = findViewById(R.id.fetchRoute);
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        startNav = findViewById(R.id.startNav);
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        routeGeometry = findViewById(R.id.routeGeometry);
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        progress = findViewById(R.id.progress);
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        fetchRoute.setOnClickListener(this);
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        startNav.setOnClickListener(this);
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        startNav.setEnabled(false);
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    }
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    @Override
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    public void onClick(View view) {
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        if (view.getId() == R.id.fetchRoute) {
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            progress.setVisibility(View.VISIBLE);
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            Point origin = Point.fromLngLat(103.75986708439264, 1.312533169133601);
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            Point destination = Point.fromLngLat(103.77982271935586, 1.310473772283314);
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            NBNavigation.fetchRoute(origin, destination, new Callback<DirectionsResponse>() {
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                @Override
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                public void onResponse(@NonNull Call<DirectionsResponse> call, @NonNull Response<DirectionsResponse> response) {
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                    progress.setVisibility(View.GONE);
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                    //start navigation with the route we just fetched.
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                    if (response.body() != null && !response.body().routes().isEmpty()) {
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                        directionsRoute = response.body().routes().get(0);
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                        routeGeometry.setText(String.format("Route Geometry: %s", directionsRoute.geometry()));
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                        startNav.setEnabled(true);
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                    }
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                }
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                @Override
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                public void onFailure(@NonNull Call<DirectionsResponse> call, @NonNull Throwable t) {
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                    progress.setVisibility(View.GONE);
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                }
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            });
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        } else if (view.getId() == R.id.startNav) {
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            NavLauncherConfig.Builder configBuilder = NavLauncherConfig.builder(directionsRoute);
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            configBuilder.locationLayerRenderMode(RenderMode.GPS);
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            configBuilder.shouldSimulateRoute(true);
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            configBuilder.lightThemeResId(R.style.Theme_CustomNavTopBannerPanel);
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configBuilder.darkThemeResId(R.style.Theme_CustomNavTopBannerPanelDark);           
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NavigationLauncher.startNavigation(CustomTopBannerPanelStyleActivity.this, configBuilder.build());
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        }
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    }
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}