If you open the solution in Xamarin Studio, it will not be able to load the Windows Phone project; and if you open the solution in Xamarin Studio under Windows, it will not be able to load the iOS project either.

TipCalc lets you type in a food-and-drink subtotal and a post-tax total from your restaurant bill and then select a tip percentage. It applies the percentage to the food-and-drink subtotal and adds the result to the post-tax total, rounded to the nearest quarter.

The solution contains four projects: the iOS, Android, and Windows Phone projects are small and standard Xamarin.Forms stub applications. All the common application code is in the TipCalc portable class library. The calculations are handled in aTipCalcModel class, and the entire user interface is realized in XAML in the TipCalcPage.xaml file. Two data-binding value converters help massage the data between the data model and the XAML file.

Author : https://github.com/rzaitov.

If you like this tutorial then you can download full copy of the code from github. 

You can configure an iOS device as a beacon as follows:
1) Obtain two iOS devices equipped with Bluetooth LE. One will be a target device, one will be a remote (calibration) device.
2) Load and launch this app on both devices.
3) Turn the target device into a beacon by selecting Configuration and turning on the Enabled switch.
4) Take the calibration device and move one meter away from the target device.
5) On the calibration device start the calibration process by selecting Calibration.
6) Choose the target device from the table view.
7) The calibration process will start. You should wave the calibration device from side-to-side while this process is running.
8) When the calibration process is done, it will show a calibrated RSSI value on the screen.
9) On the target device, go back to the Configuration screen and enter this value under Measured Power.

Note: The calibration process is optional, but recommended as it will fine-tune ranging for your environment. You can configure an iOS device as a beacon without calibrating it by not specifying a measured power. If a measured power is not specified, CoreLocation default to a pre-determined value.

Once you’ve setup your target device as a beacon, you can use this app to demo beacon ranging and monitoring. To demo ranging, select Ranging from the remote device.RangingViewController ranges a set of CLBeaconRegion. To demo monitoring, select Monitoring from the remote device.MonitoringViewController allows you to configure aCLBeaconRegion to monitor.

Author : https://github.com/aaronsky.

If you like this tutorial then you can download full copy of the code from github. 

• One overrides the draw method and handles the painting there.
• One arranges a set of Core Graphichs layers to handle the drawing.

Author : https://github.com/dylankelly5.

If you like this tutorial then you can download full copy of the code from github. 

MotionGraphs is an application project that demonstrates a how to use the push method to receive data from Core Motion. It displays graphs of accelerometer, gyroscope and device motion data.

The project has the following classes :

GraphView — A UIView subclass that provides the ability to plot accelerometer, gyroscope or device motion data. This is the same GraphView as the one in the AccelerometerGraph sample.

GraphViewController — A view controller that handles the display of accelerometer, gyroscope, and device motion data. Depending on the argument that is passed into its constructor it can display graph(s) generated from one of the three data types.

AppDelegate — A standard implementation of the UIApplicationDelegate protocol.

If you run the compiled application on a device that does not have a gyroscope, no gyroscope or device motion data will be available. You cannot effectively run the application on the simulator.

 
Author : https://github.com/aaronsky.

If you like this tutorial then you can download full copy of the code from github. 

Xamarin.Forms doesn’t yet have a vector graphics programming interface, but it does have a BoxView. Although normally used for displaying rectangular blocks of color, BoxView can be sized, positioned, and rotated. This is enough to render a classic analog clock.

Author : https://github.com/rzaitov.

If you like this tutorial then you can download full copy of the code from github. 

The TabbedPageDemo displays information about three species of primates with photographs from Wikipedia.

If you open the solution in Xamarin Studio, it will not be able to load the Windows Phone project; and if you open the solution in Xamarin Studio under Windows, it will not be able to load the iOS project either.

Author : https://github.com/rzaitov.

If you like this tutorial then you can download full copy of the code from github. 

Android :-

iOS :-

Windows :-

Author : https://github.com/rzaitov.

If you like this tutorial then you can download full copy of the code from github. 

Author : https://github.com/dylankelly5.

If you like this tutorial then you can download full copy of the code from github. 

This also shows how to setup a Login screen that transitions to the chat. On startup, it will request a login and password (both are “Root”).

The ChatViewController renders the discussion as well as a styled entry to get messages from the user and resizes the entry as needed (up to a point).

The ChatBubble hardcodes two images for left and right bubbles which are stretched using iOSUIImage support for stretching images. The ChatBubble does not really support configuring fonts or bubble colors, you will need to modify the source accordingly. Luckily the entire bubble code support is less than 100 lines of code.

Author : https://github.com/olegoid.

If you like this tutorial then you can download full copy of the code from github. 

The home screen has a button that will launch a background task that will execute even if the app is backgrounded.

Author : https://github.com/olegoid.

If you like this tutorial then you can download full copy of the code from github.