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A view that renders a virtual Keyboard. Boolean that controls whether a view should have sound effects enabled for events such as. Android Media Basics: Images, Audio, and Video. By Lauren Darcey, Shane Conder, Carmen Delessio; Nov 19, 2013. Bitmaps and Canvas. The Bitmap (android.graphics.Bitmap) class represents a bitmap image. You create bitmaps via the BitmapFactory (android.graphics.BitmapFactory) class.
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If you want to display a live video stream or any content stream such as video or an OpenGL scene, you can use TextureView provided by android in order to do that.
In order to use TextureView, all you need to do is get its SurfaceTexture.The SurfaceTexture can then be used to render content. In order to do this, you just need to do instantiate an object of this class and implement SurfaceTextureListener interface. Its syntax is given below −
After that, what you need to do is to override its methods. The methods are listed as follows −
Any view that is displayed in the texture view can be rotated and its alpha property can be adjusted by using setAlpha and setRotation methods. Its syntax is given below −
Apart from these methods, there are other methods available in TextureView class. They are listed below −
| Sr.No | Method & description |
|---|---|
| 1 | getSurfaceTexture() This method returns the SurfaceTexture used by this view. |
| 2 | getBitmap(int width, int height) This method returns Returns a Bitmap representation of the content of the associated surface texture. |
| 3 | getTransform(Matrix transform) This method returns the transform associated with this texture view. |
| 4 | isOpaque() This method indicates whether this View is opaque. Access Fluid Mechanics 8th Edition solutions now. Our solutions are written by Chegg experts so you can be assured of the highest quality! Frank M White Authors: Rent| Buy. This is an alternate ISBN. View the primary ISBN for: Fluid Mechanics 8th Edition Textbook Solutions. Solutions by Chapter. Chegg Solution Manuals are written. Frank m white fluid mechanics 6th edition solutions manual torrent. |
| 5 | lockCanvas() This method start editing the pixels in the surface |
| 6 | setOpaque(boolean opaque) This method indicates whether the content of this TextureView is opaque. |
| 7 | setTransform(Matrix transform) This method sets the transform to associate with this texture view. |
| 8 | unlockCanvasAndPost(Canvas canvas) This method finish editing pixels in the surface. |
Example
The below example demonstrates the use of TextureView class. It crates a basic application that allows you to view camera inside a texture view and change its angle , orientation e.t.c.
To experiment with this example , you need to run this on an actual device on which camera is present.
| Steps | Description |
|---|---|
| 1 | You will use android studio IDE to create an Android application and name it as TextureView under a package com.example.textureview. |
| 2 | Modify src/MainActivity.java file to add Activity code. |
| 3 | Modify layout XML file res/layout/activity_main.xml add any GUI component if required. |
| 5 | Run the application and choose a running android device and install the application on it and verify the results. |
Here is the content of src/com.example.textureview/MainActivity.java.
Here is the content of activity_main.xml
Here is the default content of AndroidManifest.xml
Let's try to run your TextureView application. I assume you have connected your actual Android Mobile device with your computer. To run the app from Android studio, open one of your project's activity files and click Run icon from the toolbar. Before starting your application, Android studio will display following window to select an option where you want to run your Android application.
Select your mobile device as an option and then check your mobile device which will display following screen. This screen has alpha property set to 0.5 and rotation set to 45.
This screen has alpha property set to 1.5 and rotation set to 45.
This screen has alpha property set to 1.0 and rotation set to 90.
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