Android 指纹功能实例代码

最近在做项目的时候遇到了添加打开app图像解锁的功能,自己嘴欠说现在都用指纹功能,自己给自己挖了一个坑,真是没谁了

从网上看了一些资料,但是给我demo考虑的不是很多,设备支不支持都没考虑,如果支持的话是否添加过指纹也不知道,其实方法都很简单。

废话不多说,贴上工具类和使用方法

package com.tsm.test;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.KeyguardManager;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.v4.hardware.fingerprint.FingerprintManagerCompat;
import android.support.v4.os.CancellationSignal;

public class FingerPrintUiHelper extends FingerprintManagerCompat.AuthenticationCallback {
  private final FingerPrintCallBack callback;
  private CancellationSignal signal;
  private FingerprintManagerCompat fingerprintManager;
  
  public static final int REQUEST_CODE_/confirm/i_DEVICE_CREDENTIALS = 10;
  
  private int count;
  
  public boolean isStartFinger;
  
  public FingerPrintUiHelper(Activity activity, FingerPrintCallBack callback) {
    this.callback = callback;
    signal = new CancellationSignal();
    fingerprintManager = FingerprintManagerCompat.from(activity);
    isStartFinger = false;
    if (!fingerprintManager.isHardwareDetected()) {
      if (callback != null)
 callback.donotSupportFinger();
      return;
    }
    if (!fingerprintManager.hasEnrolledFingerprints()) {
      if (callback != null)
 callback.FingerClosed();
    }
  }
  
  public void startFingerPrintListen() {
    count = 5;
    isStartFinger = true;
    fingerprintManager.authenticate(null, 0, signal, this, null);
  }
  
  public void stopsFingerPrintListen() {
    if (isStartFinger) {
      if (signal != null && !signal.isCanceled()) {
 signal.cancel();
      }
    }
  }
  
  @Override
  public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result) {
    if (callback != null)
      callback.onAuthenticationSucceeded();
  }
  
  @Override
  public void onAuthenticationFailed() {
    count--;
    if (count > 0) {
      if (callback != null)
 callback.onAuthenticationFailed(count);
      return;
    }
  }
  
  @Override
  public void onAuthenticationError(int errMsgId, CharSequence errString) {
    if (errMsgId == 5) {
      if (callback != null)
 callback.FingerClosed();
      return;
    }
    if (errMsgId == 7) {
      if (callback != null)
 callback.onAuthenticationError();
      return;
    }
  }
  
  @TargetApi(Build.VERSION_CODES.LOLLIPOP)
  public static void jumpToGesturePassCheck(Activity activity) {
    KeyguardManager keyguardManager =
 (KeyguardManager) activity.getSystemService(Context.KEYGUARD_SERVICE);
    Intent intent =
 keyguardManager.createConfirmDeviceCredentialIntent("finger", "测试指纹识别");
    activity.startActivityForResult(intent, REQUEST_CODE_/confirm/i_DEVICE_CREDENTIALS);
  }
  interface FingerPrintCallBack {
    
    void onAuthenticationSucceeded();
    
    void onAuthenticationFailed(int count);
    
    void onAuthenticationError();
    
    void FingerClosed();
    
    void donotSupportFinger();
  }
}

这个是工具类,下面上使用方法

package com.tsm.test;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity implements FingerPrintUiHelper.FingerPrintCallBack {
  private FingerPrintUiHelper fingerPrintUiHelper;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {////指纹功能是23之后的版本才有的
      initFingerPrint();
      Button button = (Button) findViewById(R.id.button);
      assert button != null;
      button.setonClickListener(new View.onClickListener() {
 @Override
 public void onClick(View v) {
   fingerPrintUiHelper.startFingerPrintListen();
 }
      });
      findViewById(R.id.btn).setonClickListener(new View.onClickListener() {
 @Override
 public void onClick(View v) {
   fingerPrintUiHelper.stopsFingerPrintListen();
 }
      });
    }
  }
  private void initFingerPrint() {
    fingerPrintUiHelper = new FingerPrintUiHelper(this, this);
  }
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == FingerPrintUiHelper.REQUEST_CODE_/confirm/i_DEVICE_CREDENTIALS) {
      // Challenge completed, proceed with using cipher
      if (resultCode == RESULT_OK) {
 Toast.makeText(this, "识别成功", Toast.LENGTH_SHORT).show();
// jumpToMain2Activity();
      } else {
 Toast.makeText(this, "识别失败", Toast.LENGTH_SHORT).show();
      }
    }
  }
  @Override
  protected void onDestroy() {
    if (fingerPrintUiHelper != null)
      fingerPrintUiHelper.stopsFingerPrintListen();
    super.onDestroy();
  }
  
  @Override
  public void onAuthenticationSucceeded() {
    Toast.makeText(this, "识别成功", Toast.LENGTH_SHORT).show();
  }
  @Override
  public void onAuthenticationFailed(int count) {
    String msg = "您还可以尝试%d次";
    Toast.makeText(this, String.format(msg, count), Toast.LENGTH_SHORT).show();
  }
  
  @Override
  public void onAuthenticationError() {
    FingerPrintUiHelper.jumpToGesturePassCheck(this);
  }
 
  
  @Override
  public void FingerClosed() {
    //TODO 可以写一个Dialog跳转设置页,这里我就不写了
    Toast.makeText(this, "指纹功能已关闭", Toast.LENGTH_SHORT).show();
  }
  @Override
  public void donotSupportFinger() {
  Log.i("info", "-------------doNotSupportFinger--------------------");
    Toast.makeText(this, "该设备不支持指纹功能", Toast.LENGTH_SHORT).show();
  }
 }

最后添加权限:

总结

以上所示是小编给大家介绍的Android 指纹功能实例代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！