Android set Marker with custom marker

Markers|Developer
reference to bon-app-etit

private void setMarker(final LatLng gps, final String title, final String desc, int resource)
{
 MarkerOptions markerOpt = new MarkerOptions()
 .position(gps)
 .title(title)
 .snippet(desc)
 .icon(BitmapDescriptorFactory.fromResource(resource));
 
 mGoogleMap.addMarker(markerOpt);
  
 InfoWindowAdapter iwa = new InfoWindowAdapter() {
         private final View contents = getActivity().getLayoutInflater().inflate(R.layout.custom_marker, null);
  
  @Override
  public View getInfoWindow(Marker arg0) {
   // TODO Auto-generated method stub
   return null;
  }
  
  @Override
  public View getInfoContents(Marker marker) {
      String title = marker.getTitle();
      TextView txtTitle = ((TextView) contents.findViewById(R.id.txtInfoWindowDesc));

             if (title != null) {
                 SpannableString titleText = new SpannableString(title);
                 txtTitle.setText(titleText);
             } else {
                  txtTitle.setText("");
         }
              
         TextView txtType = ((TextView) contents.findViewById(R.id.txtInfoWindowGps));
         txtType.setText(marker.getSnippet());
              
          return contents;

  }
 };
  
 mGoogleMap.setInfoWindowAdapter(iwa);
}

xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="horizontal"
  android:paddingRight="10dp">
  
  <ImageView
    android:id="@+id/ivInfoWindowMain"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_margin="10dp"
    android:adjustViewBounds="true"
    android:src="@drawable/tab_overview2">
  </ImageView>

  <LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:orientation="vertical">
    
    <TextView
      android:id="@+id/txtInfoWindowDesc"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="left"
      android:ellipsize="end"
      android:singleLine="true"
      android:textColor="#ff000000"
      android:textSize="14dp"
      android:textStyle="bold"/>

    <TextView
      android:id="@+id/txtInfoWindowGps"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:ellipsize="end"
      android:singleLine="true"
      android:textColor="#ff7f7f7f"
      android:textSize="14dp"/>
  </LinearLayout>
</LinearLayout>