Thursday, August 1, 2013

Display Custom Info Window with ImageView on Google Map V2

To display image on Google Map V2 Bubble, we will be integrating Universal Image Loader

In Map V2, to display custom bubble, there is a InfoWindowAdapter class.

Implement the InfoWindowAdapter class and override 2 methods :
1. getInfoContents(Marker marker)
2. getInfoWindow(Marker marker)

Set InfoWindowAdapter

googleMap.setInfoWindowAdapter(new CustomInfoWindowAdapter());

Store Marker id in variable with each marker image URL. So, in CustomInfoWindowAdapter class, it can be accessed using Marker Id. Fro now we will store id in Hashtable:

markers.put(hamburg.getId(), "http://img.india-forums.com/images/100x100/37525-a-still-image-of-akshay-kumar.jpg");

Create custom_info_window.xml layout. It will be displayed when click on Marker.

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/custom_info_bubble"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/badge"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginRight="5dp"
        android:adjustViewBounds="true" >
    </ImageView>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:singleLine="true"
            android:textColor="#ff000000"
            android:textSize="14dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/snippet"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ff7f7f7f"
            android:textSize="14dp" />
    </LinearLayout>

</LinearLayout>

CustomInfoWindowAdapter

package com.ngshah.goglemapv2withlazyloading;

import java.util.Hashtable;

import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.InfoWindowAdapter;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.ngshah.goglemapv2withlazyloading.R;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.cache.memory.impl.FIFOLimitedMemoryCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;

public class MainActivity extends FragmentActivity {

    private GoogleMap googleMap;
    private final LatLng HAMBURG = new LatLng(53.558, 9.927);
    private final LatLng KIEL = new LatLng(53.551, 9.993);
    private Marker marker;
    private Hashtable<String, String> markers;
    private ImageLoader imageLoader;
    private DisplayImageOptions options;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        
        initImageLoader();
        markers = new Hashtable<String, String>();
        imageLoader = ImageLoader.getInstance();
        
        options = new DisplayImageOptions.Builder()
            .showStubImage(R.drawable.ic_launcher)        //    Display Stub Image
            .showImageForEmptyUri(R.drawable.ic_launcher)    //    If Empty image found
            .cacheInMemory()
            .cacheOnDisc().bitmapConfig(Bitmap.Config.RGB_565).build();
        
        if ( googleMap != null ) {
           
            googleMap.setInfoWindowAdapter(new CustomInfoWindowAdapter());
           
            final Marker hamburg = googleMap.addMarker(new MarkerOptions().position(HAMBURG)
                        .title("Hamburg"));
            markers.put(hamburg.getId(), "http://img.india-forums.com/images/100x100/37525-a-still-image-of-akshay-kumar.jpg");
           
            final Marker kiel = googleMap.addMarker(new MarkerOptions()
                        .position(KIEL)
                        .title("Kiel")
                        .snippet("Kiel is cool")
                        .icon(BitmapDescriptorFactory
                            .fromResource(R.drawable.ic_launcher)));
            markers.put(kiel.getId(), "http://www.yodot.com/images/jpeg-images-sm.png");
             
            googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
            googleMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
        }
    }
    
    private class CustomInfoWindowAdapter implements InfoWindowAdapter {

        private View view;

        public CustomInfoWindowAdapter() {
            view = getLayoutInflater().inflate(R.layout.custom_info_window,
                    null);
        }

        @Override
        public View getInfoContents(Marker marker) {

            if (MainActivity.this.marker != null
                    && MainActivity.this.marker.isInfoWindowShown()) {
                MainActivity.this.marker.hideInfoWindow();
                MainActivity.this.marker.showInfoWindow();
            }
            return null;
        }

        @Override
        public View getInfoWindow(final Marker marker) {
            MainActivity.this.marker = marker;

            String url = null;

            if (marker.getId() != null && markers != null && markers.size() > 0) {
                if ( markers.get(marker.getId()) != null &&
                        markers.get(marker.getId()) != null) {
                    url = markers.get(marker.getId());
                }
            }
            final ImageView image = ((ImageView) view.findViewById(R.id.badge));

            if (url != null && !url.equalsIgnoreCase("null")
                    && !url.equalsIgnoreCase("")) {
                imageLoader.displayImage(url, image, options,
                        new SimpleImageLoadingListener() {
                            @Override
                            public void onLoadingComplete(String imageUri,
                                    View view, Bitmap loadedImage) {
                                super.onLoadingComplete(imageUri, view,
                                        loadedImage);
                                getInfoContents(marker);
                            }
                        });
            } else {
                image.setImageResource(R.drawable.ic_launcher);
            }

            final String title = marker.getTitle();
            final TextView titleUi = ((TextView) view.findViewById(R.id.title));
            if (title != null) {
                titleUi.setText(title);
            } else {
                titleUi.setText("");
            }

            final String snippet = marker.getSnippet();
            final TextView snippetUi = ((TextView) view
                    .findViewById(R.id.snippet));
            if (snippet != null) {
                snippetUi.setText(snippet);
            } else {
                snippetUi.setText("");
            }

            return view;
        }
    }

    private void initImageLoader() {
        int memoryCacheSize;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
            int memClass = ((ActivityManager) 
                    getSystemService(Context.ACTIVITY_SERVICE))
                    .getMemoryClass();
            memoryCacheSize = (memClass / 8) * 1024 * 1024;
        } else {
            memoryCacheSize = 2 * 1024 * 1024;
        }

        final ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
                this).threadPoolSize(5)
                .threadPriority(Thread.NORM_PRIORITY - 2)
                .memoryCacheSize(memoryCacheSize)
                .memoryCache(new FIFOLimitedMemoryCache(memoryCacheSize-1000000))
                .denyCacheImageMultipleSizesInMemory()
                .discCacheFileNameGenerator(new Md5FileNameGenerator())
                .tasksProcessingOrder(QueueProcessingType.LIFO).enableLogging() 
                .build();

        ImageLoader.getInstance().init(config);
    }
}

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