Detailed explanation of Android simple gesture password open source library

brief introduction

This paper introduces the use and implementation of an Android gesture password open source library, which mainly realizes the following functions:

Recently, I need to use the gesture password unlocking function. I found some demos and felt it was a little troublesome to use. Therefore, I made the wheel by referring to some articles and encapsulated some relevant methods, which is more convenient to use.

The GitHub link is as follows. I think it's OK. Please help with star support~

GitHub link personal blog

Use effect

First, let's look at the use effect:

usage method

Use this control in an XML layout file

Some parameters that can be set are described as follows:

initialization

Set gesture password listening event

If the password has been set, you will enter the callback and process the result here. In the above example, a password reset process is added.

Gesture password setting

If the password has not been set, the callback will be entered when drawing the gesture. The return value is the number of touch points drawn. If true is returned in onfirstinputcomplete, the drawing of the second gesture password will be entered. After two inputs are consistent, the password will be automatically saved.

The number of retries exceeds the limit

If the listening event is set, the number of input errors is limited. After exceeding the upper limit, enter the callback and handle it in the callback.

Clear the logic of the password and add a judgment. For details, see the demo on GitHub

Other APIs

Import the library in the project

Just add two lines of code:

In the project build Add to gradle:

Module build Add dependencies to gradle:

The total use is like this, isn't it very simple!

Specific implementation process

Let's talk about the implementation process. If you just use it directly, you can skip this part.

Circular view of custom gesture password

This part mainly refers to Hongyang dada's blog and has been slightly modified

Initialize incoming parameters

Draw circles of different colors according to different touch states

Draw arrow

ViewGroup for custom gesture password

Add custom view properties

Get parameters and initialization

Draw the circle according to the parameters

After onMeasure, the method is called and the circular matrix is drawn.

Handling different events in touch monitoring

Set password processing:

Check whether the gesture password is correct:

Reset:

Some methods of public disclosure

Defines the preference for the password store

It's simply saving and reading