Java 如何使用指纹扫描仪对用户进行身份验证

我一直在开发我的个人android应用程序来存储我的密码。（因为lastpass是为手机付费的）。我目前使用

简单密码验证

，但我希望能够利用我的

指纹

扫描仪

在文件

AndroidManifest.xml

中：

<uses-permission android:name="android.permission.USE_FINGERPRINT" />

但是我如何使用手机所有者的指纹对其进行身份验证呢

更新：

我用了卢波米尔·巴别夫的答案，而且答案很完美。你填写了你在OnAuthSucceed上实现的两个方法，onAuthFailed无法处理授权是否成功，我还必须添加一些权限检查，因为Android studio让我这么做

public void startListening() {
    if (isFingerScannerAvailableAndSet()) {
        try {
            if (ActivityCompat.checkSelfPermission(mContext.getApplicationContext(), Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
            }
            mFingerprintManager.authenticate(null, mCancellationSignal, 0 /* flags */, mAuthenticationCallback, null);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

及

---

我为指纹事件创建自定义处理程序类：

import android.content.Context;
import android.hardware.fingerprint.FingerprintManager;
import android.os.Build;
import android.os.CancellationSignal;

public class FingerprintHandler {
    private Context                                     mContext;
    private FingerprintManager                          mFingerprintManager = null;
    private CancellationSignal                          mCancellationSignal;
    private FingerprintManager.AuthenticationCallback   mAuthenticationCallback;
    private OnAuthenticationSucceededListener           mSucceedListener;
    private OnAuthenticationErrorListener               mFailedListener;

    public interface OnAuthenticationSucceededListener {
        void onAuthSucceeded();
    }

    public interface OnAuthenticationErrorListener {
        void onAuthFailed();
    }

    public void setOnAuthenticationSucceededListener (OnAuthenticationSucceededListener listener){
        mSucceedListener = listener;
    }

    public void setOnAuthenticationFailedListener(OnAuthenticationErrorListener listener) {
        mFailedListener = listener;
    }

    public FingerprintHandler(Context context){
        mContext = context;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            mFingerprintManager = context.getSystemService(FingerprintManager.class);
            mCancellationSignal = new CancellationSignal();

            mAuthenticationCallback = new FingerprintManager.AuthenticationCallback() {
                @Override
                public void onAuthenticationError(int errorCode, CharSequence errString) {
                    super.onAuthenticationError(errorCode, errString);
                }

                @Override
                public void onAuthenticationHelp(int helpCode, CharSequence helpString) {
                    super.onAuthenticationHelp(helpCode, helpString);
                }

                @Override
                public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
                    super.onAuthenticationSucceeded(result);
                    if( mSucceedListener != null )
                        mSucceedListener.onAuthSucceeded();
                }

                @Override
                public void onAuthenticationFailed() {
                    super.onAuthenticationFailed();
                    if (mFailedListener != null)
                        mFailedListener.onAuthFailed();
                }
            };
        }
    }

    public void startListening(){
        if (isFingerScannerAvailableAndSet() ) {
            try{
                mFingerprintManager.authenticate(null, mCancellationSignal, 0 /* flags */, mAuthenticationCallback, null);
            } catch (Exception e){
                e.printStackTrace();
            }
        }
    }

    public void stopListening(){
        if ( isFingerScannerAvailableAndSet() ) {
            try {
                mCancellationSignal.cancel();
                mCancellationSignal = null;
            } catch (Exception e){
                e.printStackTrace();
            }
        }
    }

    public boolean isFingerScannerAvailableAndSet(){
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
            return false;
        if( mFingerprintManager == null )
            return false;
        if( !mFingerprintManager.isHardwareDetected() )
            return false;
        if( !mFingerprintManager.hasEnrolledFingerprints())
            return false;

        return true;
    }
}

在初始化之后，onCreate方法中的指纹处理程序：

mFingerprintHandler = new FingerprintHandler(this);
mFingerprintHandler.setOnAuthenticationSucceededListener(this);
mFingerprintHandler.setOnAuthenticationFailedListener(this);

您可以通过以下方法检查指纹是否可用，并在活动中设置：

    if( mFingerprintHandler.isFingerScannerAvailableAndSet() ){
        // show image or text or do something 
    }

您可以通过以下方法处理指纹响应：

@Override
public void onAuthSucceeded() {
     //fingerprint auth succeded go to next activity (or do something)
}


@Override
public void onAuthFailed() {
    //fingerpring auth failed, show error toast (or do something)
}

你准备好了！：） 不要忘记在onPause和onResume方法中停止并开始监听指纹：

@Override
public void onResume() {
    super.onResume();
    mFingerprintHandler.startListening();
}

@Override
public void onPause() {
    super.onPause();
    mFingerprintHandler.stopListening();
}

---

快乐编码：）

你可以用这个。它支持所有锁定机制（PIN、图案、密码、指纹扫描仪）

---

<代码> LaSTPASS被支付< /代码> -好吧，尽管推理完全由你决定，我会说你根本不认为你的时间有价值。“最后一个通行证一年只需12美元。如果你只是为了取代最后一个通行证，那就看看keepass吧。@MarcinOrlowski我知道你在说什么，但既然我正在学习android rn，这对我来说是一个发现moreHoly的大好机会。”。。你是我的英雄，@lubomirbebev一切都像微风一样。我唯一要做的就是添加一些权限检查，但仅此而已。。谢谢，从现在起，我们将在每个应用程序中使用此功能

    if( mFingerprintHandler.isFingerScannerAvailableAndSet() ){
        // show image or text or do something 
    }

@Override
public void onAuthSucceeded() {
     //fingerprint auth succeded go to next activity (or do something)
}


@Override
public void onAuthFailed() {
    //fingerpring auth failed, show error toast (or do something)
}

@Override
public void onResume() {
    super.onResume();
    mFingerprintHandler.startListening();
}

@Override
public void onPause() {
    super.onPause();
    mFingerprintHandler.stopListening();
}

Intent credentialsIntent = null;
KeyguardManager keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP)
    credentialsIntent = keyguardManager.createConfirmDeviceCredentialIntent("title", "desc"), context.getString(R.string.verification_desc));

//If phone lock is set, launch the unlock screen
if (credentialsIntent != null) {
    ((Activity) context).startActivityForResult(credentialsIntent, CREDENTIALS_RESULT);
}
//Phone is not locked
else {
    doTheWork();
}  

@Override
public void onActivityResult(int requestCode) {
    if (requestCode == CREDENTIALS_RESULT) {
        doTheWork;
    } 
    else 
        Log.e("TA", "Error");
}