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Langston Smith
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Transparent background + video example (#820)
* initial setup * onDestroy adjustment
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‎MapboxAndroidDemo/src/main/AndroidManifest.xml

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android:name="android.support.PARENT_ACTIVITY"
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android:value="com.mapbox.mapboxandroiddemo.MainActivity" />
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</activity>
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<activity
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android:name=".examples.styles.TransparentBackgroundActivity"
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android:label="@string/activity_styles_transparent_background_title"
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android:screenOrientation="portrait">
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<meta-data
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android:name="android.support.PARENT_ACTIVITY"
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android:value="com.mapbox.mapboxandroiddemo.MainActivity" />
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</activity>
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<activity
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android:name=".examples.labs.PulsingLayerOpacityColorActivity"
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android:label="@string/activity_lab_pulsing_layer_opacity_color_title">

‎MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/MainActivity.java

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import com.mapbox.mapboxandroiddemo.examples.styles.MapboxStudioStyleActivity;
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import com.mapbox.mapboxandroiddemo.examples.styles.ShowHideLayersActivity;
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import com.mapbox.mapboxandroiddemo.examples.styles.StyleFadeSwitchActivity;
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import com.mapbox.mapboxandroiddemo.examples.styles.TransparentBackgroundActivity;
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import com.mapbox.mapboxandroiddemo.examples.styles.VectorSourceActivity;
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import com.mapbox.mapboxandroiddemo.examples.styles.ZoomDependentFillColorActivity;
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import com.mapbox.mapboxandroiddemo.labs.CalendarIntegrationActivity;
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R.string.activity_styles_fade_switch_description,
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new Intent(MainActivity.this, StyleFadeSwitchActivity.class),
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R.string.activity_styles_fade_switch_url, false, BuildConfig.MIN_SDK_VERSION));
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exampleItemModels.add(new ExampleItemModel(
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R.string.activity_styles_transparent_background_title,
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R.string.activity_styles_transparent_background_description,
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new Intent(MainActivity.this, TransparentBackgroundActivity.class),
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R.string.activity_styles_transparent_background_url, false, BuildConfig.MIN_SDK_VERSION));
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currentCategory = R.id.nav_styles;
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break;
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case R.id.nav_extrusions:

‎MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/styles/TransparentBackgroundActivity.java

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package com.mapbox.mapboxandroiddemo.examples.styles;
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// #-code-snippet: transparent-surface-activity full-java
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import android.content.Context;
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import android.net.Uri;
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import android.os.Bundle;
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import android.support.annotation.RawRes;
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import android.support.v7.app.AppCompatActivity;
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import android.widget.VideoView;
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import com.mapbox.mapboxandroiddemo.R;
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import com.mapbox.mapboxsdk.Mapbox;
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import com.mapbox.mapboxsdk.maps.MapView;
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import com.mapbox.mapboxsdk.maps.MapboxMap;
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import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.io.StringWriter;
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import java.io.Writer;
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import timber.log.Timber;
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/**
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* Create a transparent render surface and add whatever you want to the background. This example
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* has a video of moving water behind Earth's land.
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*/
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public class TransparentBackgroundActivity extends AppCompatActivity implements OnMapReadyCallback {
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private MapView mapView;
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private VideoView backgroundWaterVideoView;
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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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// Mapbox access token is configured here. This needs to be called either in your application
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// object or in the same activity which contains the mapview.
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Mapbox.getInstance(this, getString(R.string.access_token));
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// This contains the MapView in XML and needs to be called after the access token is configured.
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setContentView(R.layout.activity_style_transparent_render_background);
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mapView = findViewById(R.id.mapView);
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mapView.onCreate(savedInstanceState);
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mapView.getMapAsync(this);
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}
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@Override
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public void onMapReady(MapboxMap mapboxMap) {
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try {
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// Switch the map to a style that has no background
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mapboxMap.setStyleJson(readRawResource(this, R.raw.no_bg_style));
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initVideoView();
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} catch (IOException exception) {
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Timber.e(exception);
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}
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}
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/**
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* Place the video of moving water behind the map
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*/
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private void initVideoView() {
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backgroundWaterVideoView = findViewById(R.id.videoView);
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String path = "android.resource://" + getPackageName() + "/" + R.raw.moving_background_water;
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backgroundWaterVideoView.setVideoURI(Uri.parse(path));
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backgroundWaterVideoView.start();
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backgroundWaterVideoView.setOnCompletionListener(mediaPlayer ->
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backgroundWaterVideoView.start()
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);
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}
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// Add the mapView lifecycle to the activity's lifecycle methods
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@Override
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public void onResume() {
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super.onResume();
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mapView.onResume();
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}
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@Override
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protected void onStart() {
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super.onStart();
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mapView.onStart();
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}
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@Override
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protected void onStop() {
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super.onStop();
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mapView.onStop();
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}
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@Override
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public void onPause() {
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super.onPause();
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mapView.onPause();
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}
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@Override
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public void onLowMemory() {
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super.onLowMemory();
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mapView.onLowMemory();
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}
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@Override
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protected void onDestroy() {
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if (backgroundWaterVideoView != null) {
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backgroundWaterVideoView.stopPlayback();
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}
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super.onDestroy();
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mapView.onDestroy();
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}
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@Override
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protected void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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mapView.onSaveInstanceState(outState);
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}
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/**
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* Get the map style JSON from the raw file in the app's raw folder
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*/
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public static String readRawResource(Context context, @RawRes int rawResource) throws IOException {
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String json = "";
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if (context != null) {
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Writer writer = new StringWriter();
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char[] buffer = new char[1024];
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try (InputStream is = context.getResources().openRawResource(rawResource)) {
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Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
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int numRead;
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while ((numRead = reader.read(buffer)) != -1) {
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writer.write(buffer, 0, numRead);
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}
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}
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json = writer.toString();
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}
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return json;
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}
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}
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// #-end-code-snippet: transparent-surface-activity full-java

‎MapboxAndroidDemo/src/main/res/layout/activity_style_transparent_render_background.xml

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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:id="@+id/coordinator_layout"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<VideoView
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android:id="@+id/videoView"
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android:layout_width="match_parent"
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android:scaleX="1.8"
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android:scaleY="1.8"
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android:layout_height="match_parent"
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android:layout_gravity="center" />
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<com.mapbox.mapboxsdk.maps.MapView
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android:id="@+id/mapView"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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app:mapbox_cameraTargetLat="48.507879"
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app:mapbox_cameraTargetLng="8.363795"
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app:mapbox_cameraZoom="2"
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app:mapbox_cameraZoomMin="1.3"
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app:mapbox_renderTextureMode="true"
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app:mapbox_renderTextureTranslucentSurface="true" />
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</android.support.design.widget.CoordinatorLayout>
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‎MapboxAndroidDemo/src/main/res/raw/moving_background_water.mp4

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‎MapboxAndroidDemo/src/main/res/raw/no_bg_style.json

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{
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"version": 8,
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"name": "Land",
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"metadata": {
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"mapbox:autocomposite": true
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},
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"sources": {
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"composite": {
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"url": "mapbox://mapbox.mapbox-terrain-v2",
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"type": "vector"
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}
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},
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"sprite": "mapbox://sprites/mapbox/mapbox-terrain-v2",
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"glyphs": "mapbox://fonts/mapbox/{fontstack}/{range}.pbf",
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"layers": [
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{
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"layout": {
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"visibility": "visible"
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},
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"type": "fill",
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"source": "composite",
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"id": "admin",
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"paint": {
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"fill-color": "hsl(359, 100%, 50%)",
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"fill-opacity": 1
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},
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"source-layer": "landcover"
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},
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{
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"layout": {
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"visibility": "visible"
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},
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"type": "fill",
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"source": "composite",
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"id": "layer-0",
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"paint": {
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"fill-opacity": 1,
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"fill-color": "hsl(359, 100%, 50%)"
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},
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"source-layer": "Layer_0"
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}
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]
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}

‎MapboxAndroidDemo/src/main/res/values/descriptions_strings.xml

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<string name="activity_style_image_source_description">Use an image source to easily display images on the map.</string>
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<string name="activity_style_hillshade_description">Use elevation data to show and customize hills and mountains.</string>
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<string name="activity_styles_fade_switch_description">Fade map styles in and out based on zoom level.</string>
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<string name="activity_styles_transparent_background_description">Create a transparent background and fill it with something such as moving water.</string>
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<string name="activity_extrusions_catalina_marathon_extrusions_description">Use data-driven styling and GeoJSON data to set extrusions\' heights.</string>
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<string name="activity_extrusions_population_density_extrusions_description">Use extrusions to display 3D building height based on imported vector data.</string>
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<string name="activity_extrusions_adjust_extrusions_description">Change the location and color of the light shined on extrusions.</string>

‎MapboxAndroidDemo/src/main/res/values/titles_strings.xml

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<string name="activity_style_image_source_title">Use an image source</string>
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<string name="activity_styles_hillshade_title">Hillshading</string>
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<string name="activity_styles_fade_switch_title">Switch map styles with fade</string>
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<string name="activity_styles_transparent_background_title">Transparent render surface</string>
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<string name="activity_extrusions_catalina_marathon_extrusions_title">Use GeoJSON data to set extrusion height</string>
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<string name="activity_extrusions_population_density_extrusions_title">Display 3D building height based on vector data</string>
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<string name="activity_extrusions_adjust_extrusions_title">Adjust light location and color</string>

‎MapboxAndroidDemo/src/main/res/values/urls_strings.xml

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<string name="activity_style_image_source_url" translatable="false">https://i.imgur.com/I6B6cCE.png</string>
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<string name="activity_style_hillshade_url" translatable="false">https://i.imgur.com/U2OKixV.png</string>
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<string name="activity_styles_fade_switch_url" translatable="false">https://i.imgur.com/1sPnDx5.png</string>
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<string name="activity_styles_transparent_background_url" translatable="false">https://i.imgur.com/5bYnlp5.png</string>
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<string name="activity_extrusions_population_density_extrusions_url" translatable="false">http://i.imgur.com/se1z8Wb.png</string>
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<string name="activity_extrusions_catalina_marathon_extrusions_url" translatable="false">http://i.imgur.com/6j848JL.jpg</string>
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<string name="activity_extrusions_adjust_extrusions_url" translatable="false">http://i.imgur.com/XNTyIO5.png</string>

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