Android指纹登录工具类封装

作者: 飘在天空的羽
来源: 51数据库
2021-07-07

本文实例为大家分享了android指纹登录工具类的封装代码，供大家参考，具体内容如下

核心

android 指纹是在 6.0 才出来的一个重要的功能

@requiresapi(api = build.version_codes.m)

核心的两个 api:

fingerprintmanager
keyguardmanager

step1

判断android 版本，如果小于 6.0 支持不了指纹

if(build.version.sdk_int < build.version_codes.m){
return;
}

step2

判断手机硬件（有没有指纹感应区）就是手机是否支持传感

@requiresapi(api = build.version_codes.m)
  public boolean ishardfinger() {
    if (fingerprintmanager != null && fingerprintmanager.ishardwaredetected()) {
      return true;
    } else {
      return false;
    }
  }

step3

检查手机是否开启锁屏密码（如手机未开锁，涉及到一个优先级问题，先解锁后使用）

public boolean iswindowsafe() {
    if (keyguardmanager != null && keyguardmanager.iskeyguardsecure()) {
      return true;
    } else {
      return false;
    }
  }

step4

检查手机是否有录入指纹

@requiresapi(api = build.version_codes.m)
  public boolean ishavehandler() {
    if (fingerprintmanager != null && fingerprintmanager.hasenrolledfingerprints()) {
      return true;
    } else {
      return false;
    }
  }

只有以上步骤全满足，才能使用指纹

开启指纹验证

@requiresapi(api = build.version_codes.m)
  public void authenticate(fingerprintmanager.cryptoobject cryptoobject, cancellationsignal cancellationsignal,
               int flag,
               fingerprintmanager.authenticationcallback authenticationcallback, handler handler) {
    if (fingerprintmanager != null) {
      fingerprintmanager.authenticate(cryptoobject, cancellationsignal, flag, authenticationcallback, handler);
    }
  }

参数中最重要的就是 cancellationsignal和 callback，其他传null 和 0 就行，cancellationsignal 是用来取消指纹验证的，而callback 可以回调指纹验证失败次数或者指纹验证成功

最后附上简单工具类

/**
 * 指纹识别工具类
 */
public class fingerutils {

  private final fingerprintmanager fingerprintmanager;
  private final keyguardmanager keyguardmanager;

  @requiresapi(api = build.version_codes.m)
  private fingerutils(context context) {
    fingerprintmanager = (fingerprintmanager) context.getsystemservice(context.fingerprint_service);
    keyguardmanager = (keyguardmanager) context.getsystemservice(context.keyguard_service);
  }

  private static fingerutils singleton = null;

  @requiresapi(api = build.version_codes.m)
  public static fingerutils getinstance(context context) {
    if (singleton == null) {
      synchronized (fingerutils.class) {
        if (singleton == null) {
          singleton = new fingerutils(context);
        }
      }
    }
    return singleton;
  }


  /**
   * ②检查手机硬件（有没有指纹感应区）
   */

  @requiresapi(api = build.version_codes.m)
  public boolean ishardfinger() {
    if (fingerprintmanager != null && fingerprintmanager.ishardwaredetected()) {
      return true;
    } else {
      return false;
    }
  }

  /**
   * ③检查手机是否开启锁屏密码
   */

  public boolean iswindowsafe() {
    if (keyguardmanager != null && keyguardmanager.iskeyguardsecure()) {
      return true;
    } else {
      return false;
    }
  }

  /**
   * ④检查手机是否已录入指纹
   */
  @requiresapi(api = build.version_codes.m)
  public boolean ishavehandler() {
    if (fingerprintmanager != null && fingerprintmanager.hasenrolledfingerprints()) {
      return true;
    } else {
      return false;
    }
  }

  /**
   * 创建指纹验证
   */
  @requiresapi(api = build.version_codes.m)
  public void authenticate(fingerprintmanager.cryptoobject cryptoobject, cancellationsignal cancellationsignal,
               int flag,
               fingerprintmanager.authenticationcallback authenticationcallback, handler handler) {
    if (fingerprintmanager != null) {
      fingerprintmanager.authenticate(cryptoobject, cancellationsignal, flag, authenticationcallback, handler);
    }
  }

  /**
   * 取消指纹验证 . 应该不会用上
   */
  public void cannelfinger(cancellationsignal cancellationsignal) {
    cancellationsignal.cancel();

  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。