Android M指纹的资料太少，经过一段时间阅读原生Android代码，写了以下例子，贡献出来给需要帮助的人。

以下内容基于64位的高通CPU，搭载fpc1020芯片，此部分代码在原生android上做了更改，以应付工厂指纹的测试。原生android指纹录入需要采集10次(因不同的芯片而定)。

代码简单说明：

1. FingerPrintEnrollBase类：

重要的是

Java代码

public interface Listener {

void onEnrollmentHelp(CharSequence helpString);

void onEnrollmentError(int errMsgId, CharSequence errString);

void onEnrollmentProgressChange(int steps, int remaining);

}

这个接口。

1)onEnrollmentHelp函数:是下层返回的指纹操作帮助信息。

2)onEnrollmentError函数是下层返回的错误信息，errMsgId是错误信息类型，其中1表示指纹硬件不可用，3表示超时，5表示操作已取消。errString是errMsgId对应的文字信息，有需要的自己实验就知道了。

3)onEnrollmentProgressChange()函数是显示当前指纹的采集情况，steps：总共需要录入多少次；remaining是剩余多少次，我在此函数中有打印Log。

2. FingerPrintActivity是主Activity类，FingerPrintEnrollBase是指纹Base类。

需要特别说明的是，在FingerPrintEnrollBase类中有一句：private byte[] mToken = new byte[69];这个数组正常情况是通过输入密码后经由framework层向hal层申请的，我这里为了省去验证那一块的代码，通过sizeof(hw_auth_token_t)计算出来的为69，需要的请依此计算。我在代码里实验过，此数组如果不是69(在64位CPU上)，将直接导致程序crach!

fpc指纹的采集流程图：

源码如下：

FingerPrintEnrollBase：

Java代码

/*

* Copyright (C) 2015 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License

*/

package com.mediatek.test;

import android.app.Activity;

import android.app.Fragment;

import android.content.Context;

import android.hardware.fingerprint.FingerprintManager;

import android.os.Bundle;

import android.os.CancellationSignal;

import android.os.Handler;

import android.util.Log;

/**

* local fragment to handle the state around fingerprint enrollment.

*/

public class FingerPrintEnrollBase extends Fragment {

private int mEnrollmentSteps = -1;

private int mEnrollmentRemaining = 0;

private Listener mListener;

private boolean mEnrolling;

private CancellationSignal mEnrollmentCancel;

private Handler mHandler = new Handler();

private byte[] mToken = new byte[69];//if byte length != sizeof(hw_auth_token_t), throws Exception

private boolean mDone;

private static final String TAG = "FingerPrintEnrollBase";

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setRetainInstance(true);

}

@Override

public void onAttach(Activity activity) {

super.onAttach(activity);

}

@Override

public void onStart() {

super.onStart();

Log.d(TAG, "mToken length="+mToken.length);

if (!mEnrolling) {

FingerprintManager mFpM = (FingerprintManager) getActivity().getSystemService(Context.FINGERPRINT_SERVICE);

startEnrollment(mFpM);

}

}

@Override

public void onStop() {

super.onStop();

if (!getActivity().isChangingConfigurations()) {

cancelEnrollment();

}

}

protected void startEnrollment(FingerprintManager mFpM) {

mHandler.removeCallbacks(mTimeoutRunnable);

mEnrollmentSteps = -1;

mEnrollmentCancel = new CancellationSignal();

if(mFpM != null){

mFpM.enroll(mToken, mEnrollmentCancel, 0, mEnrollmentCallback);

}

mEnrolling = true;

}

protected void cancelEnrollment() {

mHandler.removeCallbacks(mTimeoutRunnable);

if (mEnrolling) {

mEnrollmentCancel.cancel();

mEnrolling = false;

mEnrollmentSteps = -1;

}

}

public void setListener(Listener listener) {

mListener = listener;

}

public int getEnrollmentSteps() {

return mEnrollmentSteps;

}

public int getEnrollmentRemaining() {

return mEnrollmentRemaining;

}

public boolean isDone() {

return mDone;

}

private FingerprintManager.EnrollmentCallback mEnrollmentCallback

= new FingerprintManager.EnrollmentCallback() {

@Override

public void onEnrollmentProgress(int remaining) {

if (mEnrollmentSteps == -1) {

mEnrollmentSteps = remaining;

}

mEnrollmentRemaining = remaining;

mDone = remaining == 0;

if (mListener != null) {

mListener.onEnrollmentProgressChange(mEnrollmentSteps, remaining);

}

}

@Override

public void onEnrollmentHelp(int helpMsgId, CharSequence helpString) {

if (mListener != null) {

mListener.onEnrollmentHelp(helpString);

}

}

@Override

public void onEnrollmentError(int errMsgId, CharSequence errString) {

if (mListener != null) {

mListener.onEnrollmentError(errMsgId, errString);

}

}

};

private final Runnable mTimeoutRunnable = new Runnable() {

@Override

public void run() {

cancelEnrollment();

}

};

public interface Listener {

void onEnrollmentHelp(CharSequence helpString);

void onEnrollmentError(int errMsgId, CharSequence errString);

void onEnrollmentProgressChange(int steps, int remaining);

}

}

FingerPrintActivity：

Java代码

package com.mediatek.test;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.List;

import java.util.Timer;

import java.util.TimerTask;

import android.R.color;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.graphics.Color;

import android.os.Bundle;

import android.os.CancellationSignal;

import android.os.Handler;

import android.os.Message;

import android.text.Spannable;

import android.text.style.ForegroundColorSpan;

import android.util.Log;

import android.view.KeyEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ProgressBar;

import android.widget.TableRow;

import android.widget.TextView;

import android.widget.Toast;

import com.mediatek.test.R;

import android.hardware.fingerprint.Fingerprint;

import android.hardware.fingerprint.FingerprintManager;

public class FingerPrintActivity extends Activity implements FingerPrintEnrollBase.Listener{

private static final String TAG = "FingerPrintActivity";

private MyHandler mHandler = new MyHandler();

private TextView fingerPrintAcquisitionTextView, fingerPrintEnrollmentErrorView, fingerPrintEnrollmentHelpView;

private FingerPrintEnrollBase fpeb;

private FingerprintManager mFingerprintManager;

@Override

protected int setTitleId() {

return R.string.tittle_fingerprint;

}

@Override

protected Activity getActivity() {

return this;

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.fingerprint);

fingerPrintAcquisitionTextView = (TextView)findViewById(R.id.fingerprint_message);

fingerPrintEnrollmentErrorView= (TextView)findViewById(R.id.fingerprint_enrollment_error);

fingerPrintEnrollmentHelpView= (TextView)findViewById(R.id.fingerprint_enrollment_help);

mFingerprintManager = (FingerprintManager) getActivity().getSystemService(

Context.FINGERPRINT_SERVICE);

}

private void sendMsgToHandler(int msgType, String remark){

Message msg = Message.obtain();

msg.what = msgType;

Bundle bundle = new Bundle();

bundle.putString("result", remark);

msg.setData(bundle);

mHandler.sendMessage(msg);

}

@Override

public void onEnrollmentHelp(CharSequence helpString) {

Log.d(TAG, "==onEnrollmentHelp="+helpString.toString());

sendMsgToHandler(3, helpString.toString());

}

@Override

public void onEnrollmentError(int errMsgId, CharSequence errString) {

Log.d(TAG, "==onEnrollmentError errMsgId="+errMsgId+" errString="+errString.toString());

if(errMsgId == 3){//time out

postEnrollment();

}else if(errMsgId == 1){//hardware lose efficacy

startEnrollment();

}else if(errMsgId == 5){//operation cancel

}else{

sendMsgToHandler(4, errString.toString());

}

}

@Override

public void onEnrollmentProgressChange(int steps, int remaining) {

Log.d(TAG, "===============onEnrollmentProgressChange=======");

Log.d(TAG, "steps" + steps + "||remaining=" + remaining);

fingerPrintEnrollmentHelpView.setText("");

fingerPrintEnrollmentErrorView.setText("");

sendMsgToHandler(2, getString(R.string.fingerprint_validate_success));

buttonS.setEnabled(true);

stopFingerprint();

}

private void startEnrollment(){

if (fpeb == null) {

fpeb = new FingerPrintEnrollBase();

}

fpeb.setListener(this);

fpeb.startEnrollment(mFingerprintManager);

}

private void postEnrollment(){

if(mFingerprintManager != null){

mFingerprintManager.postEnroll();

}

}

private void stopFingerprint() {

if (fpeb != null){

fpeb.cancelEnrollment();

onStop();

}

}

@Override

protected void onStart() {

super.onStart();

}

@Override

protected void onStop() {

super.onStop();

if(fpeb != null){

fpeb.setListener(null);

}

}

@Override

protected void onResume() {

super.onResume();

if(mFingerprintManager == null){

mFingerprintManager = (FingerprintManager) getActivity().getSystemService(

Context.FINGERPRINT_SERVICE);

}

startEnrollment();

}

@Override

protected void onPause() {

super.onPause();

postEnrollment();

mFingerprintManager = null;

stopFingerprint();

fpeb = null;

}

class MyHandler extends Handler{

@Override

public void handleMessage(Message msg) {

Bundle bundle = null;

super.handleMessage(msg);

switch (msg.what) {

case 0:

removeMessages(0);

bundle = msg.getData();

String result = bundle.getString("result");

selfTestView.setText(result);

selfTestView.setTextColor(result.contains("PASS")?Color.GREEN:Color.RED);

break;

case 1:

removeMessages(1);

bundle = msg.getData();

String rs = bundle.getString("result");

checkBroadView.setText(bundle.getString("result"));

checkBroadView.setTextColor(rs.contains("PASS")?Color.GREEN:Color.RED);

break;

case 2:

removeMessages(2);

bundle = msg.getData();

String fingerprint = bundle.getString("result");

fingerPrintAcquisitionTextView.setText(bundle.getString("result"));

fingerPrintAcquisitionTextView.setTextColor(fingerprint.contains("PASS")?Color.GREEN:Color.WHITE);

mButtonSelftest.setEnabled(true);

mButtonCheckerboardTest.setEnabled(true);

break;

case 3:

removeMessages(3);

bundle = msg.getData();

String enrollmentHelp = bundle.getString("result");

fingerPrintEnrollmentHelpView.setText(bundle.getString("result"));

break;

case 4:

removeMessages(4);

bundle = msg.getData();

String enrollmentError = bundle.getString("result");

fingerPrintEnrollmentErrorView.setText(bundle.getString("result"));

fingerPrintAcquisitionTextView.setText("");

break;

default:

break;

}

}

}

}

以上就是对Android 指纹资料的整理，后续继续补充相关资料，谢谢大家对本站的支持！