Android指纹登录工具类封装

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脚本之家。

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