Develop Reference

Inside onMapReady, Picasso doesn't load image the first time

Picasso is being used across the app and it works fine except when I'm using it inside onMapReady to load marker images. Here's the code:
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromBitmap(getMarkerBitmapFromView1(strImage,strNameplace)))
.position(lnglng));
}
private Bitmap getMarkerBitmapFromView1(String strImage, String strNameplace) {
final View customMarkerView = ((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.marker_custom, null);
markerImageView = customMarkerView.findViewById(R.id.ivan);
final Target target = new Target() {
#Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
markerImageView.setImageBitmap(bitmap);
}
#Override
public void onBitmapFailed(Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
};
markerImageView.setTag(target);
Picasso.with(this)
.load(strImage)
.into(target);
customMarkerView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
customMarkerView.layout(0, 0, customMarkerView.getMeasuredWidth(), customMarkerView.getMeasuredHeight());
customMarkerView.buildDrawingCache();
Bitmap returnedBitmap = Bitmap.createBitmap(customMarkerView.getMeasuredWidth(), customMarkerView.getMeasuredHeight(),
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(returnedBitmap);
canvas.drawColor(Color.WHITE, PorterDuff.Mode.SRC_IN);
Drawable drawable = customMarkerView.getBackground();
if (drawable != null)
drawable.draw(canvas);
customMarkerView.draw(canvas);
return returnedBitmap;
}
How can I achieve loading the images in first run?

Fading animation not working when an image is loaded with .asBitmap()

I have this code
Glide
.with(this)
.load(mUrl)
.asBitmap()
.thumbnail(Glide
.with(this)
.load(mPreviewUrl)
.asBitmap()
.animate(R.anim.fade_in))
.listener(new RequestListener<String, Bitmap>() {
#Override
public boolean onException(Exception e, String model, Target<Bitmap> target, boolean isFirstResource) {
mProgressBar.setVisibility(View.GONE);
return false;
}
#Override
public boolean onResourceReady(Bitmap resource, String model, Target<Bitmap> target, boolean isFromMemoryCache, boolean isFirstResource) {
mProgressBar.setVisibility(View.GONE);
return false;
}
})
.into(new SimpleTarget<Bitmap>(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL) {
#Override
public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
mWallpaperImageView.setImageBitmap(resource);
createPaletteAsync(resource);
}
});
This downloads an image and returns a Bitmap object, which then I use to generate a palette of colour with the Palette library. I also want to load the bitmap in an ImageView, and I do that with mWallpaperImageView.setImageBitmap(resource) which loads the image without any fading or animation to smooth out the loading.
If I use glide like this:
Glide.with(this)
.load(mUrl)
.crossFade(500)
.into(mImageView)
then the image appears with fading but then I don't have a Bitmap object.

According to this answer,
Unfortunately, there isn't a built in way to cross fade Bitmaps. You
can however, use a custom BitmapImageViewTarget, and use a
TransitionDrawable in onResourceReady() to cross fade.
Fortunately, there's a trick to enable fading effect with bitmap in Glide.
For this you will need two classes,
FadingDrawable
final public class FadingDrawable extends BitmapDrawable {
// Only accessed from main thread.
private static final float FADE_DURATION = 200; //ms
private final float density;
Drawable placeholder;
long startTimeMillis;
boolean animating;
int alpha = 0xFF;
FadingDrawable(Context context, Bitmap bitmap, Drawable placeholder) {
super(context.getResources(), bitmap);
this.density = context.getResources().getDisplayMetrics().density;
this.placeholder = placeholder;
animating = true;
startTimeMillis = SystemClock.uptimeMillis();
}
/**
* Create or update the drawable on the target {#link android.widget.ImageView} to display the supplied bitmap
* image.
*/
static public void setBitmap(ImageView target, Context context, Bitmap bitmap) {
if (bitmap != null && !bitmap.isRecycled()) {
Drawable placeholder = target.getDrawable();
if (placeholder instanceof AnimationDrawable) {
((AnimationDrawable) placeholder).stop();
}
FadingDrawable drawable = new FadingDrawable(context, bitmap, placeholder);
//this will avoid OverDraw
//target.setBackgroundDrawable(null);
//target.setBackgroundColor(0);
target.setImageDrawable(drawable);
}
}
/**
* Create or update the drawable on the target {#link android.widget.ImageView} to display the supplied
* placeholder image.
*/
static void setPlaceholder(ImageView target, Drawable placeholderDrawable) {
target.setImageDrawable(placeholderDrawable);
if (target.getDrawable() instanceof AnimationDrawable) {
((AnimationDrawable) target.getDrawable()).start();
}
}
#Override
public void draw(Canvas canvas) {
if (!animating) {
super.draw(canvas);
} else {
float normalized = (SystemClock.uptimeMillis() - startTimeMillis) / FADE_DURATION;
if (normalized >= 1f) {
animating = false;
placeholder = null;
super.draw(canvas);
} else {
if (placeholder != null) {
placeholder.draw(canvas);
}
int partialAlpha = (int) (alpha * normalized);
super.setAlpha(partialAlpha);
super.draw(canvas);
super.setAlpha(alpha);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1) {
invalidateSelf();
}
}
}
}
#Override
public void setAlpha(int alpha) {
this.alpha = alpha;
if (placeholder != null) {
placeholder.setAlpha(alpha);
}
super.setAlpha(alpha);
}
#Override
public void setColorFilter(ColorFilter cf) {
if (placeholder != null) {
placeholder.setColorFilter(cf);
}
super.setColorFilter(cf);
}
#Override
protected void onBoundsChange(Rect bounds) {
if (placeholder != null) {
placeholder.setBounds(bounds);
}
super.onBoundsChange(bounds);
}
}
and GlideImageView
public class GlideImageView extends AppCompatImageView {
public GlideImageView(Context context) {
this(context, null);
}
public GlideImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public GlideImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
Drawable placeholder = getDrawable();
if (placeholder instanceof AnimationDrawable) {
((AnimationDrawable) placeholder).stop();
Glide.clear(this);
}
}
#Override
public void setImageBitmap(Bitmap bitmap) {
if (bitmap != null) FadingDrawable.setBitmap(this, getContext(), bitmap);
}
public void setImageBitmapWithoutAnimation(Bitmap bitmap) {
super.setImageBitmap(bitmap);
}
}
Now change your mWallpaperImageView from ImageView to
<com.yourpackage.GlideImageView
android:id="#+id/mWallpaperImageView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
And finally remove all external animation effect from Glide configuration,
Glide
.with(this)
.load(mUrl)
.asBitmap()
.thumbnail(Glide
.with(this)
.load(mPreviewUrl)
.asBitmap()
.listener(new RequestListener<String, Bitmap>() {
#Override
public boolean onException(Exception e, String model, Target<Bitmap> target, boolean isFirstResource) {
mProgressBar.setVisibility(View.GONE);
return false;
}
#Override
public boolean onResourceReady(Bitmap resource, String model, Target<Bitmap> target, boolean isFromMemoryCache, boolean isFirstResource) {
mProgressBar.setVisibility(View.GONE);
return false;
}
})
.into(new SimpleTarget<Bitmap>(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL) {
#Override
public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
mWallpaperImageView.setImageBitmap(resource);
createPaletteAsync(resource);
}
});
Tested and working properly!

You can use the value of the alpha of an image to create a fade in or fade out effect:
In Java
yourimage.animate().setAlpha(0f).setDuration(2000);
given that the image's alpha starts with alpha =1 (not transparent).
so the image will disappear (transparent) during 2 seconds

MapClustering not rendering String.valueof(cluster.getSize)

I am using MapCustomClustering to show images on the map. The Cluster Icon also shows the number of items in the cluster but it doesn't show in mine. I am loading data from Parse cloud. The example one renders cluster.getSize() but in mine it doesn't work.
#Override
protected void onBeforeClusterRendered(final Cluster<MapPosts> cluster, final MarkerOptions markerOptions) {
// Draw multiple people.
// Note: this method runs on the UI thread. Don't spend too much time in here (like in this example).
final List<Drawable> profilePhotos = new ArrayList<>(Math.min(4, cluster.getSize()));
final int width = mDimension;
final int height = mDimension;
int i = 0;
for (MapPosts p : cluster.getItems()) {
// Draw 4 at most.
i++;
Picasso.with(getApplicationContext())
.load(String.valueOf(p.profilePhoto))
.into(new Target() {
#Override
public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
Drawable drawable = new BitmapDrawable(getResources(), bitmap);
drawable.setBounds(0, 0, width, height);
profilePhotos.add(drawable);
MultiDrawable multiDrawable = new MultiDrawable(profilePhotos);
multiDrawable.setBounds(0, 0, width, height);
mClusterImageView.setImageDrawable(multiDrawable);
Bitmap icon = mClusterIconGenerator.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
}
#Override
public void onBitmapFailed(Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
});
if (profilePhotos.size() == 4) break;
}
}

I found the answear :-) -> Make sure you have some TextView like this in your icon style! The IMPORTANT POINT is you name it "text" !!!
<TextView
**android:id="#id/text"**
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/holo_green_dark"
android:paddingLeft="#dimen/custom_profile_padding"
android:paddingRight="#dimen/custom_profile_padding"
android:layout_gravity="center"
android:alpha=".8"/>

Android maps utils cluster icon color

Is there any method to change the background color of the cluster item? (the one that displays the count of the markers, like 100+, 200+ ...). I tried to look into the source code of the ClusterManager but could not find any option to change the color, but maybe someone here knows how to do that. I basically want to "materialify" those colors a bit.

I was able to get a rough implementation working by using this demo from the library samples as a guide.
I used the lens icon from the Material Design Icons from here. After downloading the lens zip I put ic_lens_black_24dp.png under the drawable folder. Then I used the Drawable.setColorFilter() method to change the default color in the code.
I was also able to change the default Marker color, and figured I would include that as well here.
First, set a Renderer by calling setRenderer():
mClusterManager.setRenderer(new MyClusterRenderer(this, mMap,
mClusterManager));
Then, define the MyClusterRenderer class:
public class MyClusterRenderer extends DefaultClusterRenderer<MyItem> {
private final IconGenerator mClusterIconGenerator = new IconGenerator(getApplicationContext());
public MyClusterRenderer(Context context, GoogleMap map,
ClusterManager<MyItem> clusterManager) {
super(context, map, clusterManager);
}
#Override
protected void onBeforeClusterItemRendered(MyItem item,
MarkerOptions markerOptions) {
BitmapDescriptor markerDescriptor = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA);
markerOptions.icon(markerDescriptor);
}
#Override
protected void onClusterItemRendered(MyItem clusterItem, Marker marker) {
super.onClusterItemRendered(clusterItem, marker);
}
#Override
protected void onBeforeClusterRendered(Cluster<MyItem> cluster, MarkerOptions markerOptions){
final Drawable clusterIcon = getResources().getDrawable(R.drawable.ic_lens_black_24dp);
clusterIcon.setColorFilter(getResources().getColor(android.R.color.holo_orange_light), PorterDuff.Mode.SRC_ATOP);
mClusterIconGenerator.setBackground(clusterIcon);
//modify padding for one or two digit numbers
if (cluster.getSize() < 10) {
mClusterIconGenerator.setContentPadding(40, 20, 0, 0);
}
else {
mClusterIconGenerator.setContentPadding(30, 20, 0, 0);
}
Bitmap icon = mClusterIconGenerator.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
}
}
Full class code:
public class MapsActivity extends AppCompatActivity
implements ClusterManager.OnClusterItemInfoWindowClickListener<MyItem> {
private ClusterManager<MyItem> mClusterManager;
private MyItem clickedClusterItem;
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.getUiSettings().setMapToolbarEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.setMyLocationEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
mClusterManager = new ClusterManager<>(this, mMap);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(37.779977,-122.413742), 10));
mMap.setOnCameraChangeListener(mClusterManager);
mMap.setOnMarkerClickListener(mClusterManager);
mClusterManager.setRenderer(new MyClusterRenderer(this, mMap,
mClusterManager));
mMap.setInfoWindowAdapter(mClusterManager.getMarkerManager());
mMap.setOnInfoWindowClickListener(mClusterManager); //added
mClusterManager.setOnClusterItemInfoWindowClickListener(this); //added
mClusterManager
.setOnClusterItemClickListener(new ClusterManager.OnClusterItemClickListener<MyItem>() {
#Override
public boolean onClusterItemClick(MyItem item) {
clickedClusterItem = item;
return false;
}
});
addItems();
mClusterManager.getMarkerCollection().setOnInfoWindowAdapter(
new MyCustomAdapterForItems());
}
private void addItems() {
double latitude = 37.779977;
double longitude = -122.413742;
for (int i = 0; i < 10; i++) {
double offset = i / 60d;
double lat = latitude + offset;
double lng = longitude + offset;
MyItem offsetItem = new MyItem(lat, lng, "title " + i+1, "snippet " + i+1);
mClusterManager.addItem(offsetItem);
}
}
//added with edit
#Override
public void onClusterItemInfoWindowClick(MyItem myItem) {
//Cluster item InfoWindow clicked, set title as action
Intent i = new Intent(this, OtherActivity.class);
i.setAction(myItem.getTitle());
startActivity(i);
//You may want to do different things for each InfoWindow:
if (myItem.getTitle().equals("some title")){
//do something specific to this InfoWindow....
}
}
public class MyCustomAdapterForItems implements GoogleMap.InfoWindowAdapter {
private final View myContentsView;
MyCustomAdapterForItems() {
myContentsView = getLayoutInflater().inflate(
R.layout.info_window, null);
}
#Override
public View getInfoWindow(Marker marker) {
TextView tvTitle = ((TextView) myContentsView
.findViewById(R.id.txtTitle));
TextView tvSnippet = ((TextView) myContentsView
.findViewById(R.id.txtSnippet));
tvTitle.setText(clickedClusterItem.getTitle());
tvSnippet.setText(clickedClusterItem.getSnippet());
return myContentsView;
}
#Override
public View getInfoContents(Marker marker) {
return null;
}
}
public class MyClusterRenderer extends DefaultClusterRenderer<MyItem> {
private final IconGenerator mClusterIconGenerator = new IconGenerator(getApplicationContext());
public MyClusterRenderer(Context context, GoogleMap map,
ClusterManager<MyItem> clusterManager) {
super(context, map, clusterManager);
}
#Override
protected void onBeforeClusterItemRendered(MyItem item,
MarkerOptions markerOptions) {
BitmapDescriptor markerDescriptor = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA);
markerOptions.icon(markerDescriptor);
}
#Override
protected void onClusterItemRendered(MyItem clusterItem, Marker marker) {
super.onClusterItemRendered(clusterItem, marker);
}
#Override
protected void onBeforeClusterRendered(Cluster<MyItem> cluster, MarkerOptions markerOptions){
final Drawable clusterIcon = getResources().getDrawable(R.drawable.ic_lens_black_24dp);
clusterIcon.setColorFilter(getResources().getColor(android.R.color.holo_orange_light), PorterDuff.Mode.SRC_ATOP);
mClusterIconGenerator.setBackground(clusterIcon);
//modify padding for one or two digit numbers
if (cluster.getSize() < 10) {
mClusterIconGenerator.setContentPadding(40, 20, 0, 0);
}
else {
mClusterIconGenerator.setContentPadding(30, 20, 0, 0);
}
Bitmap icon = mClusterIconGenerator.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
}
}
}
Result:
Initial app launch:
Zooming out, some clustering:
Zooming out again, all Markers clustered:

We can Override getColor in CustomClusterRenderer.
public class CustomClusterRenderer extends DefaultClusterRenderer<CustomClusterItem> {
#Override
protected int getColor(int clusterSize) {
return Color.parseColor("#567238");
}
}

I took some methods of superclass and partially remade them. Now i have beautiful standard clusters with my own colors.
public class CustomClusterRenderer extends DefaultClusterRenderer<GoogleMapMarker> {
private final IconGenerator mIconGenerator;
private ShapeDrawable mColoredCircleBackground;
private SparseArray<BitmapDescriptor> mIcons = new SparseArray();
private final float mDensity;
private Context mContext;
public CustomClusterRenderer(Context context, GoogleMap map,
ClusterManager<GoogleMapMarker> clusterManager) {
super(context, map, clusterManager);
this.mContext = context;
this.mDensity = context.getResources().getDisplayMetrics().density;
this.mIconGenerator = new IconGenerator(context);
this.mIconGenerator.setContentView(this.makeSquareTextView(context));
this.mIconGenerator.setTextAppearance(
com.google.maps.android.R.style.ClusterIcon_TextAppearance);
this.mIconGenerator.setBackground(this.makeClusterBackground());
}
#Override
protected void onBeforeClusterRendered(Cluster<GoogleMapMarker> cluster,
MarkerOptions markerOptions) {
// Main color
int clusterColor = mContext.getResources().getColor(R.color.colorPrimary);
int bucket = this.getBucket(cluster);
BitmapDescriptor descriptor = this.mIcons.get(bucket);
if(descriptor == null) {
this.mColoredCircleBackground.getPaint().setColor(clusterColor);
descriptor = BitmapDescriptorFactory.fromBitmap(
this.mIconGenerator.makeIcon(this.getClusterText(bucket)));
this.mIcons.put(bucket, descriptor);
}
markerOptions.icon(descriptor);
}
private SquareTextView makeSquareTextView(Context context) {
SquareTextView squareTextView = new SquareTextView(context);
ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(-2, -2);
squareTextView.setLayoutParams(layoutParams);
squareTextView.setId(com.google.maps.android.R.id.text);
int twelveDpi = (int)(12.0F * this.mDensity);
squareTextView.setPadding(twelveDpi, twelveDpi, twelveDpi, twelveDpi);
return squareTextView;
}
private LayerDrawable makeClusterBackground() {
// Outline color
int clusterOutlineColor = mContext.getResources().getColor(R.color.colorWhite);
this.mColoredCircleBackground = new ShapeDrawable(new OvalShape());
ShapeDrawable outline = new ShapeDrawable(new OvalShape());
outline.getPaint().setColor(clusterOutlineColor);
LayerDrawable background = new LayerDrawable(
new Drawable[]{outline, this.mColoredCircleBackground});
int strokeWidth = (int)(this.mDensity * 3.0F);
background.setLayerInset(1, strokeWidth, strokeWidth, strokeWidth, strokeWidth);
return background;
}
And then set renderer to Cluster Manager
mClusterManager = new ClusterManager<>(context, mGoogleMap);
mClusterManager.setRenderer(new CustomClusterRenderer(context, mGoogleMap, mClusterManager));

Nice custom renderer with centered text and different sizes of clusters:
public class MyClusterRenderer extends DefaultClusterRenderer<Station> {
private final IconGenerator mClusterIconGeneratorBig = new IconGenerator(getCtx());
private final IconGenerator mClusterIconGeneratorMed = new IconGenerator(getCtx());
private final IconGenerator mClusterIconGeneratorSml = new IconGenerator(getCtx());
final Drawable clusterIconBig = getResources().getDrawable(R.drawable.marker1);
final Drawable clusterIconMed = getResources().getDrawable(R.drawable.marker2);
final Drawable clusterIconSml = getResources().getDrawable(R.drawable.marker3);
public MyClusterRenderer(Context context, GoogleMap map,
ClusterManager<Station> clusterManager) {
super(context, map, clusterManager);
setupIconGen(mClusterIconGeneratorBig, clusterIconBig, context);
setupIconGen(mClusterIconGeneratorMed, clusterIconMed, context);
setupIconGen(mClusterIconGeneratorSml, clusterIconSml, context);
}
private void setupIconGen(IconGenerator generator, Drawable drawable, Context context) {
TextView textView = new TextView(context);
textView.setTextAppearance(context, R.style.BubbleText);
textView.setTypeface(App.FONTS[2]);
textView.setId(com.google.maps.android.R.id.amu_text);
textView.setGravity(android.view.Gravity.CENTER);
textView.setLayoutParams(new FrameLayout.LayoutParams(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()));
generator.setContentView(textView);
generator.setBackground(drawable);
}
#Override
protected void onBeforeClusterItemRendered(Station item, MarkerOptions markerOptions) {
BitmapDescriptor markerDescriptor = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA);
markerOptions.icon(markerDescriptor);
}
#Override
protected void onClusterItemRendered(Station clusterItem, Marker marker) {
super.onClusterItemRendered(clusterItem, marker);
}
#Override
protected void onBeforeClusterRendered(Cluster<Station> cluster, MarkerOptions markerOptions) {
if (cluster.getSize() > 20) {
Bitmap icon = mClusterIconGeneratorBig.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
} else if (cluster.getSize() > 10) {
Bitmap icon = mClusterIconGeneratorMed.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
} else {
Bitmap icon = mClusterIconGeneratorSml.makeIcon(String.valueOf(cluster.getSize()));
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
}
}
#Override
protected boolean shouldRenderAsCluster(Cluster cluster) {
return cluster.getSize() > 5;
}
}

Go to DefaultClusterRenderer (package com.google.maps.android.clustering.view;), and change the getColor() method to this:
private int getColor(int clusterSize) {
// custom color
double _logClusterSize; // log
final int _maxRed = Integer.parseInt("ff", 16);
// Log.v("kai", String.valueOf(_maxRed));
final int _minRed = Integer.parseInt("e6", 16);
final int _maxGreen = Integer.parseInt("a2", 16);
final int _minGreen = Integer.parseInt("47", 16);
final int _maxBlue = Integer.parseInt("93", 16);
final int _minBlue = Integer.parseInt("2d", 16);
final double _maxLogClusterSize = 10;
double _step = (_maxRed - _minRed) / _maxLogClusterSize;
_logClusterSize = Math.log(clusterSize);
if(_logClusterSize > 10) _logClusterSize = 10;
int _red = _maxRed - (int) (_step * _logClusterSize);
int _green = _maxGreen - (int) (_step * _logClusterSize);
int _blue = _maxBlue - (int) (_step * _logClusterSize);
return Color.rgb(_red, _green, _blue);
// final float hueRange = 220;
// final float sizeRange = 300;
// final float size = Math.min(clusterSize, sizeRange);
// final float hue = (sizeRange - size) * (sizeRange - size) / (sizeRange * sizeRange) * hueRange;
// return Color.HSVToColor(new float[]{
// hue, 1f, .6f
// });
}
This will change the Cluster color to pink, in the range of the color defined by min(max) red(green, blue). Hope that help!

Sadly, overriding getColor doesn't work for me. But this looks enough to change the marker color (and something else):
class ClusterItemRenderer(
context: Context, map: GoogleMap,
clusterManager: ClusterManager<ClusterMarker>
) : DefaultClusterRenderer<ClusterMarker>(context, map, clusterManager) {
override fun onBeforeClusterItemRendered(item: ClusterMarker, markerOptions: MarkerOptions) {
val markerDescriptor = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)
markerOptions.icon(markerDescriptor)
}
}
It's also possible to add updates according to the recommendations:
If you're using custom clustering (i.e, if you're extending
DefaultClusterRenderer), you must override two additional methods in
v1:
onClusterItemUpdated() - should be the same* as your onBeforeClusterItemRendered() method
onClusterUpdated() - should be the same* as your onBeforeClusterRendered() method
*Note that these methods can't be identical, as you need to use a Marker instead of MarkerOptions
override fun onClusterItemUpdated(item: ClusterMarker, marker: Marker) {
val markerDescriptor = BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)
marker.setIcon(markerDescriptor)
}

Android Google map show custom marker and clustering issue

I would like to show the custom marker to google map and cluster them. The marker contains a ImageView that will shows the avatar that is downloaded from network. Here is my target:
Everythings are OK, however, when I implemented the Google Maps Android Marker Clustering Utility, the ImageView shows the same avatar (sometime two wrong avatars).
Here is my custom MarkerRender:
public class MarkerRender extends DefaultClusterRenderer<Image> {
private static final String TAG = MarkerRender.class.getSimpleName();
private IconGenerator clusterGenerator;
private IconGenerator markerGenerator;
private ImageView mImgMarkerThumbnail;
private ImageView mImgMarkerClusterThumbnail;
private TextView txtSizeCluster;
private Activity activity;
private Bitmap mask, background;
private AtomicInteger imageDownloadCounter;
private int totalItem;
private ImageSize imageSize;
public MarkerRender(FragmentActivity activity, GoogleMap mMap, ClusterManager<Image> mClusterManager) {
super(activity, mMap, mClusterManager);
this.activity = activity;
imageDownloadCounter = new AtomicInteger(0);
mask = BitmapFactory.decodeResource(activity.getResources(),
R.drawable.annotation_behind);
background = BitmapFactory.decodeResource(activity.getResources(),
R.drawable.annotation_behind);
setUpClusterIcon();
setUpMarker();
}
private void setUpClusterIcon() {
clusterGenerator = new IconGenerator(activity);
View clusterView = activity.getLayoutInflater().inflate(R.layout.custom_marker_cluster, null);
txtSizeCluster = (TextView) clusterView.findViewById(R.id.tv_number_marker);
mImgMarkerClusterThumbnail = (ImageView) clusterView.findViewById(R.id.img_load);
clusterGenerator.setContentView(clusterView);
clusterGenerator.setBackground(null);
}
private void setUpMarker() {
markerGenerator = new IconGenerator(activity);
View markerView = activity.getLayoutInflater().inflate(R.layout.custom_marker, null);
mImgMarkerThumbnail = (ImageView) markerView.findViewById(R.id.img_load);
markerGenerator.setContentView(markerView);
markerGenerator.setBackground(null);
}
#Override
protected void onBeforeClusterItemRendered(final Image image, final MarkerOptions markerOptions) {
initImageSizeIfNeed();
Bitmap icon = markerGenerator.makeIcon();
PFLogManager.INSTANCE.logE(TAG, "maken icon: " + icon.hashCode());
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
icon.recycle();
}
#Override
protected void onClusterItemRendered(final Image image, Marker marker) {
super.onClusterItemRendered(image, marker);
ImageLoader.getInstance().loadImage(image.getMapImageLink(), imageSize,
new SimpleImageLoadingListener() {
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
Bitmap croppedBitmap = Helpers.makeCroppedBitmap(loadedImage, background, mask);
mImgMarkerThumbnail.setImageBitmap(croppedBitmap);
}
});
}
#Override
protected void onBeforeClusterRendered(Cluster<Image> cluster, MarkerOptions markerOptions) {
initImageSizeIfNeed();
Bitmap icon = clusterGenerator.makeIcon();
markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
icon.recycle();
}
#Override
protected void onClusterRendered(Cluster<Image> cluster, Marker marker) {
super.onClusterRendered(cluster, marker);
ArrayList<Image> list = new ArrayList<>(cluster.getItems());
setTextNumberMarker(cluster);
String urlFirstImage = list.get(0).getMapImageLink();
ImageLoader.getInstance().loadImage(urlFirstImage, imageSize,
new SimpleImageLoadingListener() {
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
final Bitmap croppedBitmap = Helpers.makeCroppedBitmap(loadedImage, background, mask);
mImgMarkerClusterThumbnail.setImageBitmap(croppedBitmap);
}
});
}
private void loadClusterThumbnail(String url) {
}
private void setTextNumberMarker(Cluster<Image> cluster) {
int size = cluster.getSize();
if (size > 99) {
txtSizeCluster.setText("99+");
} else {
txtSizeCluster.setText(String.valueOf(cluster.getSize()));
}
}
#Override
protected boolean shouldRenderAsCluster(Cluster cluster) {
return cluster.getSize() > 1;
}
}
I've guess that the issue is I use only one ImageView to show those avatar, so I try to use unique ImageView for each marker (by inflat new one from xml every time needed), but the result is they are all show the blank marker (just the background and there is no avatar).

I've resolved it myself. My solution is use the Marker.setIcon() method after the image is downloaded from netword or got from cache. I dont use the ImageView anymore.
So, i modified the above MarkerRender class:
The setUpClusterIcon() method:
private void setUpClusterIcon() {
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(markerWidth, markerHeight);
ImageView marker = new ImageView(activity);
marker.setLayoutParams(params);
clusterGenerator = new IconGenerator(activity);
clusterGenerator.setContentView(marker);
clusterGenerator.setBackground(null);
}
And the onClusterItemRendered() method:
protected void onClusterItemRendered(final Image image, final Marker marker) {
super.onClusterItemRendered(image, marker);
ImageLoader.getInstance().loadImage(image.getMapImageLink(), imageSize,
new SimpleImageLoadingListener() {
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
Bitmap croppedBitmap = Helpers.makeClusterItemBitmap(background, loadedImage, mask);
try {
marker.setIcon(BitmapDescriptorFactory.fromBitmap(croppedBitmap));
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
Also the makeClusterItemBitmap helper method:
public static Bitmap makeClusterItemBitmap(Bitmap background, Bitmap original, Bitmap mask) {
Bitmap croppedOriginal = makeCroppedBitmap(original, mask);
Bitmap result = Bitmap.createBitmap(background.getWidth(), background.getHeight(),
Bitmap.Config.ARGB_8888);
Canvas mCanvas = new Canvas(result);
croppedOriginal = Bitmap.createScaledBitmap(croppedOriginal, croppedOriginal.getWidth() - 20, croppedOriginal.getHeight() - 20, true);
mCanvas.drawBitmap(background, 0, 0, null);
mCanvas.drawBitmap(croppedOriginal, 10, 10, null);
return result;
}
public static Bitmap makeCroppedBitmap(Bitmap original, Bitmap mask) {
original = Bitmap.createScaledBitmap(original, mask.getWidth(),
mask.getHeight(), true);
Bitmap result = Bitmap.createBitmap(original.getWidth(), original.getHeight(),
Bitmap.Config.ARGB_8888);
Canvas mCanvas = new Canvas(result);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
mCanvas.drawBitmap(original, 0, 0, null);
mCanvas.drawBitmap(mask, 0, 0, paint);
paint.setXfermode(null);
return result;
}
Done, finish three nightmare researchingdays days :P
However, this approach leads new issue: the performance. Cause by drawing new bitmap with many layers, the map is laggy a bit. I'm thinking in improving this :)
Any sugguestion are appriciate :D