Android指纹识别，2017312 03

Android 6.0 之后Google官方推出了指纹识别，但是很多厂商在6.0之前就有了指纹识别这一功能，这就涉及到了适配问题，不可能抛弃6.0之前的用户。

1，先介绍6.0之后的指纹识别的使用，虽然很简单，但也有几个坑。这里有两种方法获取到指纹对象。 FingerprintManager mManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE); FingerprintManagerCompat mManager = FingerprintManagerCompat.from(this);

一开始我以为用哪个都可以，反正只是兼容6.0以上的，但在使用第一种的时候在6.0以下就会崩溃，使用try catch都没用，在我的印象里try catch应该是能否捕获所有的异常，但不知为什么就没有捕获到这个ClassNotFoundException，不知有没有知道为什么的，希望给个提示，虽然可以先判断版本，但我怕特殊机型会出问题，就使用了兼容包里的FingerprintManagerCompat，但万万没想到，不好使，监听没有回掉，判断返回都是false，这弄的我很是诧异，偶然间发现当兼容包v4 v7 包依赖为25.0.0时是好使的，所以没办法只能是回滚了，这里还有一个需要注意的东西，项目中类库的包的兼容包依赖版本不能高于项目中的。

2，兼容三星的指纹识别 http://developer.samsung.com/galaxy/pass# 可以在这个地址中下载三星指纹识别需要的sdk，通过使用他的demo，可以很容易的容，在后面代码中会介绍几个常用的方法。三星给了自己的指纹识别dialog，而google并没有给指纹识别的界面，开发时因为时间原因就没有找怎么更改他给的dialog。而其他的则是模仿ios的指纹提示页面。还有我原以为6.0之后用google的就会好使，但没想到有的三星手机升级6.0之后并不好使，没有直接6.0系统的三星手机，所以就只能判断以下版本在判断以下有三星的sdk是否好使了，不好使在用google的方法。

3，兼容魅族手机 http://open-wiki.flyme.cn/index.php?title=指纹识别API 可以在这个地址中下载魅族手机指纹识别需要的sdk，这个就比较简单了，6.0以下使用这个，6.0以上使用官方的，但不知为什么没有api介绍，难道是我没有找到？里面有两个方法让我很是纠结不知那个是判断是否支持指纹，也没有那么多的测试机。

FingerprintManager open = FingerprintManager.open(); open.isSurpport() open.isFingerEnable()

4，代码：

/** * 判断能否使用指纹 */ public boolean canUseFingerprint() { //判断是否是三星手机而且可使用指纹 if (InfoUtil.getBrandName().equals("samsung")) {//判断是否是三星手机 if (FingerPrintUtil.get().isSamsungCanUseFingerPrint(this)) { return true; } else { return false; } } else if (InfoUtil.getBrandName().equals("Meizu") && InfoUtil.getSDKVersionNumber() < Build.VERSION_CODES.M) {//判断是否是魅族手机 if(FingerPrintUtil.get().isMeizuCanUseFingerPrint()){ return true; }else{ return false; } } else { if (InfoUtil.getSDKVersionNumber() >= Build.VERSION_CODES.M) { try { //捕获异常是否有FingerprintManager这个类 // FingerprintManager mFingerprintManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE); FingerprintManagerCompat mFingerprintManager = FingerprintManagerCompat.from(this); boolean hardwareDetected = mFingerprintManager.isHardwareDetected(); if (hardwareDetected) { return true; } } catch (Exception e) { return false; } } } return false; } /** * BrandName * @return */ public static String getBrandName(){ String brand = android.os.Build.BRAND; if (brand == null || brand.length() <= 0) { return ""; } else { return brand; } } public class FingerPrintUtil { private static FingerPrintUtil sFingerPrintUtil; public static FingerPrintUtil get(){ if(sFingerPrintUtil==null) { sFingerPrintUtil = new FingerPrintUtil(); } return sFingerPrintUtil; } public boolean isSamsungCanUseFingerPrint(Context context){ Spass mSpass = new Spass(); try { mSpass.initialize(context); boolean isFeatureEnabled_fingerprint = mSpass.isFeatureEnabled(Spass.DEVICE_FINGERPRINT); //判断是否可用指纹 if(isFeatureEnabled_fingerprint){ return true; }else{ return false; } } catch (SsdkUnsupportedException e) { // log("Exception: " + e); } catch (UnsupportedOperationException e) { // log("Fingerprint Service is not supported in the device"); } return false; } public boolean hasSetSamsungFingerPrint(Context context){ SpassFingerprint mSpassFingerprint = new SpassFingerprint(context); boolean hasEnrolledFingerprints = mSpassFingerprint.hasRegisteredFinger(); return hasEnrolledFingerprints; } public boolean isMeizuCanUseFingerPrint(){ try { FingerprintManager open = FingerprintManager.open(); if (open.isFingerEnable() && open.isSurpport()) { return true; } else { return false; } }catch (Exception e){ return false; } } public boolean hasMeizuSetFingerprint(){ try { FingerprintManager open = FingerprintManager.open(); if(open.getIds()==null){ return false; }else{ return true; } }catch (Exception e){ e.printStackTrace(); } return false; } }

google的指纹监听回掉的使用方法这个网上介绍很多，就不多做注释了：

mCancellationSignal = new CancellationSignal(); mManager.authenticate(null, 0, mCancellationSignal, new FingerprintManagerCompat.AuthenticationCallback() { @Override public void onAuthenticationError(int errMsgId, CharSequence errString) { super.onAuthenticationError(errMsgId, errString); mFingerprintHint.setText(errString); if (errString.equals("指纹操作已取消。")) { cancelFingerPrintDialog(); } } @Override public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) { super.onAuthenticationHelp(helpMsgId, helpString); mFingerprintHint.setText(helpString); } @Override public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result) { super.onAuthenticationSucceeded(result); cancelFingerPrintDialog(); requestUserInfo(); } @Override public void onAuthenticationFailed() { super.onAuthenticationFailed(); mFingerprintHint.setText("再试一次"); } }, null);

samsung的指纹识别回掉：

package com.yibairun.presenter; import android.content.Context; import com.samsung.android.sdk.pass.Spass; import com.samsung.android.sdk.pass.SpassFingerprint; import com.yibairun.contract.FingerPrintContract; /** * Created by zhangqingbin on 2017/3/8. */ public class SamsungFingerprintImpl { private final SpassFingerprint mSpassFingerprint; private final Spass mSpass; private final Context context; private final FingerPrintContract.OnSamsungFingerPrintCallBack callBack; private boolean onReadyIdentify; public SamsungFingerprintImpl(Context context, SpassFingerprint spassFingerprint, Spass spass, FingerPrintContract.OnSamsungFingerPrintCallBack callBack) { this.mSpassFingerprint = spassFingerprint; this.mSpass = spass; this.context = context; this.callBack=callBack; } private SpassFingerprint.IdentifyListener mIdentifyListenerDialog = new SpassFingerprint.IdentifyListener() { @Override public void onFinished(int eventStatus) { // log("identify finished : reason =" + getEventStatusName(eventStatus)); int FingerprintIndex = 0; boolean isFailedIdentify = false; onReadyIdentify = false; try { FingerprintIndex = mSpassFingerprint.getIdentifiedFingerprintIndex(); } catch (IllegalStateException ise) { // log(ise.getMessage()); } if (eventStatus == SpassFingerprint.STATUS_AUTHENTIFICATION_SUCCESS) { callBack.onPrintSuccess(); // log("onFinished() : Identify authentification Success with FingerprintIndex : " + FingerprintIndex); } else if (eventStatus == SpassFingerprint.STATUS_AUTHENTIFICATION_PASSWORD_SUCCESS) { // log("onFinished() : Password authentification Success"); } else if (eventStatus == SpassFingerprint.STATUS_USER_CANCELLED || eventStatus == SpassFingerprint.STATUS_USER_CANCELLED_BY_TOUCH_OUTSIDE) { // log("onFinished() : User cancel this identify."); } else if (eventStatus == SpassFingerprint.STATUS_TIMEOUT_FAILED) { // log("onFinished() : The time for identify is finished."); callBack.onPrintFailed("识别失败"); } else if (!mSpass.isFeatureEnabled(Spass.DEVICE_FINGERPRINT_AVAILABLE_PASSWORD)) { if (eventStatus == SpassFingerprint.STATUS_BUTTON_PRESSED) { // log("onFinished() : User pressed the own button"); // Toast.makeText(mContext, "Please connect own Backup Menu", Toast.LENGTH_SHORT).show(); } } else { // log("onFinished() : Authentification Fail for identify"); isFailedIdentify = true; } // if (!isFailedIdentify) { // resetIdentifyIndexDialog(); // } } @Override public void onReady() { // log("identify state is ready"); } @Override public void onStarted() { // log("User touched fingerprint sensor"); } @Override public void onCompleted() { // log("the identify is completed"); } }; public void startIdentifyDialog(boolean backup) { if (onReadyIdentify == false) { onReadyIdentify = true; try { if (mSpassFingerprint != null) { // setIdentifyIndexDialog(); mSpassFingerprint.startIdentifyWithDialog(context, mIdentifyListenerDialog, backup); } } catch (IllegalStateException e) { onReadyIdentify = false; // resetIdentifyIndexDialog(); // log("Exception: " + e); } } else { // log("The previous request is remained. Please finished or cancel first"); } } }

魅族的指纹识别回掉：

package com.yibairun.presenter; import com.fingerprints.service.FingerprintManager; import com.yibairun.contract.FingerPrintContract; /** * Created by zhangqingbin on 2017/3/9. */ public class MeizuFingerprintImpl { private final FingerPrintContract.OnMeizuFingerPrintCallBack callBack; private FingerprintManager.IdentifyCallback mIdentifyCallback; public MeizuFingerprintImpl(FingerPrintContract.OnMeizuFingerPrintCallBack callBack) { this.callBack=callBack; } FingerprintManager mFM; private void initFingPrintManager() { if (mFM == null) { mFM = FingerprintManager.open(); //调用open方法得到FingerprintManager } } public void startVerify() { initFingPrintManager(); //得到FingerprintManager实例 if (mFM.getIds() == null) { //得到系统中已经录入的指纹个数 return; } if (mIdentifyCallback == null) { //创建指纹认证回调函数 mIdentifyCallback = createIdentifyCallback(); } mFM.startIdentify(mIdentifyCallback, mFM.getIds()); //调用指纹认证接口 } private FingerprintManager.IdentifyCallback createIdentifyCallback() { return new FingerprintManager.IdentifyCallback() { @Override public void onIdentified(int id, boolean updated) { //认证成功 callBack.onMeizuPrintSuccess(); mFM.release(); //认证成功后release, 需要注意的是在不使用指纹功能后必须要调用release, 也就是说open和release严格配对 //否则会造成mBack不能使用, 因为只有调用release之后才能从指纹模式切换到back模式 } @Override public void onNoMatch() { //认证失败 // Log.d(TAG, "onNoMatch! "); callBack.onMeizuPrintFailed("认证失败"); startVerify(); //一次认证失败后重新再次发起认证 } }; } }

后续如果有测试机就会尝试兼容其他种类手机，并且补充这篇文章