Detect Info Window Click, implements OnInfoWindowClickListener.

To detect user click on Info Window, implements OnInfoWindowClickListener. And setOnInfoWindowClickListener() to register it.

Modify from the post "Create custom info contents for GoogleMaps V2, by implementing custom InfoWindowAdapter".

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.InfoWindowAdapter;
import com.google.android.gms.maps.GoogleMap.OnInfoWindowClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.MapFragment;
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 android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity 
  implements OnMapLongClickListener, OnInfoWindowClickListener{
 
 class MyInfoWindowAdapter implements InfoWindowAdapter{
  
  private final View myContentsView;
  
  MyInfoWindowAdapter(){
   myContentsView = getLayoutInflater().inflate(R.layout.custom_info_contents, null); 
  }

  @Override
  public View getInfoContents(Marker marker) {
   TextView tvTitle = ((TextView)myContentsView.findViewById(R.id.title));
            tvTitle.setText(marker.getTitle());
            TextView tvSnippet = ((TextView)myContentsView.findViewById(R.id.snippet));
            tvSnippet.setText(marker.getSnippet());
   
            return myContentsView;
  }

  @Override
  public View getInfoWindow(Marker marker) {
   // TODO Auto-generated method stub
   return null;
  }
  
 }
 
 final int RQS_GooglePlayServices = 1;
 private GoogleMap myMap;
 TextView tvLocInfo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvLocInfo = (TextView)findViewById(R.id.locinfo);
        
        FragmentManager myFragmentManager = getFragmentManager();
        MapFragment myMapFragment 
         = (MapFragment)myFragmentManager.findFragmentById(R.id.map);
        myMap = myMapFragment.getMap();
        
        myMap.setMyLocationEnabled(true);
        
        myMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
        
        myMap.getUiSettings().setZoomControlsEnabled(true);
        myMap.getUiSettings().setCompassEnabled(true);
        myMap.getUiSettings().setMyLocationButtonEnabled(true);
        
        myMap.getUiSettings().setAllGesturesEnabled(true);
        
        myMap.setTrafficEnabled(true);
        
        myMap.setOnMapLongClickListener(this);
        myMap.setInfoWindowAdapter(new MyInfoWindowAdapter());
        myMap.setOnInfoWindowClickListener(this);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case R.id.menu_legalnotices:
   String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
     getApplicationContext());
   AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
   LicenseDialog.setTitle("Legal Notices");
   LicenseDialog.setMessage(LicenseInfo);
   LicenseDialog.show();
   return true; 
  }
  return super.onOptionsItemSelected(item); 
 }

 @Override
 protected void onResume() {
  super.onResume();
  
  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show();
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices); 
  }
 }

 @Override
 public void onMapLongClick(LatLng point) {
  tvLocInfo.setText("New marker added@" + point.toString());
  
  Marker newMarker = myMap.addMarker(new MarkerOptions()
         .position(point)
         .snippet(point.toString()));
  newMarker.setTitle(newMarker.getId());
  
 }

 @Override
 public void onInfoWindowClick(Marker marker) {
  Toast.makeText(getBaseContext(), 
    "Info Window clicked@" + marker.getId(), 
    Toast.LENGTH_SHORT).show();
  
 }
    
}

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The series:

A simple example using Google Maps Android API v2, step by step.