Android　　지문 인식 개발 예제

Android M 지문 자료가 너무 적어, 원생 Android 코드를 읽어보다가 일段时间을 보냈고, 다음 예제를 작성하여 필요한 사람들에게 기여했습니다.

　　다음 내용은64비트의 퀄컴 CPU, fpc을 탑재했습니다.1020 칩, 이 부분 코드는 원생 android에서 공장 지문 테스트를 대비하여 변경되었습니다. 원생 android 지문 입력은 수집이 필요합니다10번(칩에 따라 다릅니다).

　　코드 간단 설명:

　　1. FingerPrintEnrollBase 클래스:

　　중요한 것은

Java 코드

public interface Listener { 
  void onEnrollmentHelp(CharSequence helpString); 
  void onEnrollmentError(int errMsgId, CharSequence errString); 
  void onEnrollmentProgressChange(int steps, int remaining); 
}

　　이 인터페이스.

　　1)onEnrollmentHelp 함수는 하위에서 반환하는 지문 작업 도움 정보입니다.

　　2）onEnrollmentError 함수는 하위에서 반환하는 오류 정보입니다. errMsgId는 오류 정보 유형이며, 중에서1지문 하드웨어가 사용할 수 없음을 나타냅니다.3시간 초과를 나타냅니다.5操作이 취소되었습니다. errString은 errMsgId에 해당하는 텍스트 정보이며, 필요한 경우 자신이 실험해 보세요.

　　3）onEnrollmentProgressChange（）函数用于显示当前指纹采集情况，steps：总共需要录入多少次；remaining是剩余多少次，我在此函数中打印了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];此数组在正常情况下是通过输入密码后通过framework层向hal层申请的，为了省去验证那部分的代码，我这里通过sizeof(hw_auth_token_t)计算出来的为69，需要的话请按照此计算。我在代码中实验过，此数组如果不是69（在64如果在位CPU上直接运行，将直接导致程序崩溃！

　　　　　　 fpc指纹采集流程图：

　　　　　　源码如下：

　　　　　　 FingerPrintEnrollBase：

Java 코드

/* 
 * 版权（C） 2015 Android开源项目 
 * 
 * 根据Apache许可证版本 2.0（"许可协议"）； 
 * 您只能按照许可协议使用此文件。 
 * 您可以在以下位置获取许可协议的副本： 
 * 
 *  http://www.apache.org/许可/许可协议-2.0 
 * 
 * 除非适用法律要求或书面同意，否则软件 
 * 在许可协议下分发的软件是以"现状"为基础分发的。 
 * 无论明示或暗示，均不提供任何类型的保证或条件。 
 * 许可协议中规定了具体的管理权限语言，请参阅许可协议。 
 * 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 남아 있는) { 
   if (mEnrollmentSteps == -1) { 
    mEnrollmentSteps = 남아 있는; 
   } 
   mEnrollmentRemaining = 남아 있는; 
   mDone = 남아 있는 것이 0인가; 
   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 코드

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")&63;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; 
   } 
  } 
 } 
}

이上是 Android 지문 자료의 정리입니다. 이후 추가적인 자료를 계속 보충하겠습니다. 많은 도움을 주셔서 감사합니다!

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Android 지문 인식 개발 예제

Android　　지문 인식 개발 예제