Example of method for Android to realize magnifying glass effect (with source code)

preface

Many students who have used English applications should see the effect of more than one magnifying glass, that is, after selecting a text, there will be a magnifying glass. How can this be realized? Let's analyze it today.

Source code analysis

The basic principle is to use shapedrawable to construct a circular drawable, and then set its paint shader to the picture to be enlarged, and then there is a simple position movement problem. The radius and magnification of the magnifying glass can be modified in the code. The code has comments, which should be well understood.

However, if there is only one solution to a problem, it is a bit frustrating. It's impossible to play something different. To play the program, you have to play personality and passion. Ha ha, there's too much nonsense. Get back to the point.

Let's look at another implementation of the magnifying glass

The path class is used here to cut out a circular area of the canvas and draw an enlarged part on it.

Source code download: click here

summary

The above is the whole content of this article. I hope the content of this article can bring some help to your study or work. If you have any questions, you can leave a message.