Simple implementation of Android magnifying glass effect

Using the previously learned graphics and image painting technology and image adding special effects technology, we come to realize a simple application of Android magnifying glass.

The final effect is shown in the figure

Specific implementation:

The layout file RES / layout / main.xml used to display custom drawing classes:

Open mainactivity, create an internal class named MyView in the file, inherit android.view.view class, add construction method and override OnDraw (canvas) method, and draw in it:

MainActivity:

The running effect is the same as that shown in the first picture, and the test is successful.

The above is the whole content of this article. I hope it will be helpful to your study, and I hope you can support programming tips.