#Map - Guide to Solve different kinds of Problems

Browse the beautiful apps built using Flutter

How to Combine Multiple Maps in Flutter/Dart

How to Combine Multiple Maps in Flutter/Dart

In this example, you will learn to combine or merge two or more maps in one map in Flutter or Dart. Sometimes, you may need to combine multiple hasMap into one map while building the mobile app.

[Solved] Concurrent modification during iteration Error in Flutter

[Solved] Concurrent modification during iteration Error in Flutter

In this post, you will learn to solve the ʺConcurrent modification during iterationʺ error in Dart or Flutter. This error occurs when you modify Map while iteration, or during the loop, i.e. Add or remove an item from Map during the loop.

How to Remove Item from Map in Flutter/Dart

How to Remove Item from Map in Flutter/Dart

In this example, you will learn how to remove single or multiple items from a Map using a key or value in Dart or Flutter. You may need to remove the specific element from the Map under different conditions.

How to Update Map Value in Flutter/Dart

How to Update Map Value in Flutter/Dart

This post will teach you to update the Map value in Dart or Flutter. You may need to update the value of the map in many conditions and instances like when you have new values for any map element.

How to Iterate through Map Values in Dart/Flutter

How to Iterate through Map Values in Dart/Flutter

This post will teach you how to iterate or loop through Map keys and values in Dart or Flutter. To go through a map is very important while reading API data or any data. See the example below to loop through the hashmap in Flutter.

How to Set Min/Max Zoom Level on Google Map in Flutter

How to Set Min/Max Zoom Level on Google Map in Flutter

In this example, you will know how to pre-set minimum and maximum zoom levels on Google Maps so that users can’t zoom more than the maximum zoom level or less than the minimum zoom level on Flutter App.

How to Draw Polylines on Google Map in Flutter

How to Draw Polylines on Google Map in Flutter

In this example, you will learn to draw polylines on Google Map in Flutter. Drawing polylines is an important factor of Google map to show path, direction or trails with different kind of color or lines, see the example below to dray polylines on Google Map:

How to Draw Polyline Trails of Moving Maker on Google Map in Flutter

How to Draw Polyline Trails of Moving Maker on Google Map in Flutter

In this example, you will learn how to draw polyline trails behind the marker while moving it from one location to another location on Google Map in Flutter. This feature is an important factor if you are making any GPS tracking or vehicle tracking app.

How to Move Marker Smoothly on Google Map in Flutter

How to Move Marker Smoothly on Google Map in Flutter

In this example, you will learn how to move the position of the marker from one location to another location smoothly like running a vehicle on Google Maps in Flutter. Moving markers smoothly is a very important factor while you are making any app to show vehicles on Google Map.

How to Move Markers Position on Google Map in Flutter

How to Move Markers Position on Google Map in Flutter

In this example, you will learn to move or change the position of the marker among many markers from one location point to another location point. Here, I have shown to move one marker from one longitude and latitude to another.

How to Resize Google Map Marker Image in Flutter

How to Resize Google Map Marker Image in Flutter

In this example, you will learn how to resize the bitmap image byte which is used as a marker image icon on Google Maps in Flutter. Google Maps shows the marker on its actual image size, here you will learn to resize the marker icon image.

How to Convert Map/Array List to JSON String in Flutter

How to Convert Map/Array List to JSON String in Flutter

In this post, we are going to show you how to convert a Map, Simple Array List, or List of Objects to JSON string in Flutter and Dart. You may need to convert array list or map to JSON string to save as string or send to the server as a string on your app.