Android指纹识别认识和基本使用详解

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

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.FragmentActivity;
import android.support.v4.hardware.fingerprint.FingerprintManagerCompat;
import android.view.View;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
 
public class FingerActivity extends FragmentActivity {
 private Button mCancelBtn;
 private ImageView mShakeImage;
 private TextView mTryText;
 private int mCount=5;
 private FingerPrintUtils mFingerUtils;
 private TranslateAnimation mAnimation;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_finger);
 
 mCancelBtn = (Button) findViewById(R.id.finger_cancel);
 mCancelBtn.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  finish();
  }
 });
 mTryText= (TextView) findViewById(R.id.try_text);
 mTryText.setText("请轻触感应器验证指纹");
 mShakeImage = (ImageView) findViewById(R.id.image_finger);
 mAnimation=new TranslateAnimation(0,5,0,0);
 mAnimation.setDuration(800);
 mAnimation.setInterpolator(new CycleInterpolator(8));
 mFingerUtils=new FingerPrintUtils(this);
 mFingerUtils.setFingerPrintListener(new FingerCallBack());
 }
 
 
 private class FingerCallBack extends FingerprintManagerCompat.AuthenticationCallback{
 //多次识别失败,并且，不能短时间内调用指纹验证
 @Override
 public void onAuthenticationError(int errMsgId, CharSequence errString) {
  super.onAuthenticationError(errMsgId, errString);
  if (mCount>1){
  mCount--;
  mTryText.setText("指纹不匹配，还可以尝试"+mCount+"次");
  }else {
  mTryText.setText("1分钟后可重试!");
  }
  mHandler.sendMessageDelayed(new Message(), 1000 * 60);
 }
 
 //出错可恢复
 @Override
 public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
  super.onAuthenticationHelp(helpMsgId, helpString);
 }
 
 //识别成功
 @Override
 public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result) {
  super.onAuthenticationSucceeded(result);
  mFingerUtils.stopsFingerPrintListener();
  finish();
  Toast.makeText(FingerActivity.this, "识别成功+++", Toast.LENGTH_SHORT).show();
 
 }
 
 //识别失败
 @Override
 public void onAuthenticationFailed() {
  super.onAuthenticationFailed();
  if (mCount>1){
  mCount--;
  mTryText.setText("指纹不匹配，还可以尝试"+mCount+"次");
  }
  mShakeImage.startAnimation(mAnimation);
 }
 }
 
 private Handler mHandler=new Handler(){
 @Override
 public void handleMessage(Message msg) {
  super.handleMessage(msg);
  if (mFingerUtils!=null){
  mFingerUtils.reSetFingerPrintListener(new FingerCallBack());
  }
  mCount=5;
  if (mTryText!=null) {
  mTryText.setText("请轻触感应器验证指纹");
  }
 
 }
 };
 
}