FMX.FlashLight Sample

This is a sample that uses FireMonkey to make your device function as a flashlight.

Location

You can find the FireMonkeyMobile FlashLight sample project at:

• Start | Programs | Embarcadero RAD Studio Rio | Samples and navigate to:
  • Object Pascal\Multi-Device Samples\Device Sensors and Services\FlashLight
  • CPP\Multi-Device Samples\Device Sensors and Services\FlashLight
• Subversion Repository:
  • You can find Delphi and C++ code samples in GitHub Repositories. Search by name into the samples repositories according to your RAD Studio version.

Description

This application shows the use of the TCameraComponent to toggle a device flash.

Note: This application only has effect on an actual mobile device.

How to Use the Sample

1. Navigate to the one of the locations given above, and open:
   • Delphi: FlashLight.dproj
   • C++: FlashLight.cbproj
2. Press F9 or choose Run > Run.

Files

The project has one source file, FlashLightU.pas, which contains the main form class.

Classes

TFlashLightForm represents the main form of the application. It contains the following components:

• A TLayout object.
• A TCameraComponent object.
• Four TImage objects:
  • FlashLight
  • Light
  • ImageOn
  • ImageOff

Implementation

• The main form contains two TImage objects: ImageOff and ImageOn that are shown or hidden depending on whether the flash is active.
• The flashlight and the light on the screen are also two TImage objects on which two effects are applied: TGlowEffect and TShadowEffect.

Uses

• FMX.Media.TCameraComponent
• FMX.Media.TCameraComponent.TorchMode
• FMX.Controls.TControl.Visible

See Also

• FMX.CameraComponent Sample

• Lighting up the sky with FireMonkey
• FireMonkey Application Design
• FireMonkey
• iOS Mobile Application Development
• Tutorial: How to Use Cameras in a FireMonkey 3D Application
• Troubleshooting: Cannot Deploy to the iOS Simulator
• Troubleshooting: Cannot Deploy to the iOS Device