Android: How to create a custom camera preview widget?

You need to create the following constructor in SurfaceView for this to work: CapturePreview(Context context, AttributeSet attrs) As you might know, in Java constructors aren't inherited from it's superclass, yet this is the constructor that Android tries to invoke when you use that component in an XML file (as opposed to defining your GUI programmatically). That won't work, of course, hence the error message, which should be a lot more clearer, in my opinion The AttributeSet contains every attribute mentioned in the XML declaration, so if you have custom attributes for your component, you can retrieve and take actions on them in the constructor.

You need to create the following constructor in SurfaceView for this to work: CapturePreview(Context context, AttributeSet attrs) As you might know, in Java constructors aren't inherited from it's superclass, yet this is the constructor that Android tries to invoke when you use that component in an XML file (as opposed to defining your GUI programmatically). That won't work, of course, hence the error message, which should be a lot more clearer, in my opinion. The AttributeSet contains every attribute mentioned in the XML declaration, so if you have custom attributes for your component, you can retrieve and take actions on them in the constructor.

You can implement a onTouchListener() to the respected view. When ever you clicks on the surface automatically Android System will take you to the onTouchListener() method.

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