安卓指纹识别

安卓正式引入指纹模块,是在API23版本中,所以本文只针对API23以上的,不对API23以下,各大厂商的各自的Rom指纹做说明.

首先在清单文件中加入指纹权限:

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

注:我的studio版本是2.3.0,在使用中 清单文件中有这么一行代码
android:roundIcon="@mipmap/ic_launcher_round"
会导致指纹无法识别到,我删去了这行代码就可以了.如果各位也遇到这种情况 不妨试试.

public class ShuangMianActivity extends BaseActivity {
    private FingerHelper fingerHelper;
    private ImageView  imageViewPic;
    private int type = 0;

    @Override
    protected int getLayout() {
        return R.layout.activity_shuang_mian;
    }

    @Override
    protected void initView() {
        imageViewPic = (ImageView) findViewById(R.id.iv_shuangmianzhiwen_pic);
    }

    @Override
    protected void initData() {
        initFingerPrint();
    }

    private void initFingerPrint() {
        fingerPrintUiHelper = new FingerPrintUiHelper(this);
        fingerPrintUiHelper.startFingerPrintListen(new FingerprintManagerCompat.AuthenticationCallback() {

            @Override
            public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result) {
                Toast.makeText(ShuangMianActivity.this, "指纹识别成功", Toast.LENGTH_SHORT).show();
            }


            @Override
            public void onAuthenticationFailed() {
//                Toast.makeText(MainActivity.this, "指纹识别失败", Toast.LENGTH_SHORT).show();
               
            }

            @Override
            public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
                Toast.makeText(ShuangMianActivity.this, helpString, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onAuthenticationError(int errMsgId, CharSequence errString) {
                //但多次指纹密码验证错误后，进入此方法；并且，不能短时间内调用指纹验证
                Toast.makeText(ShuangMianActivity.this, "您尝试次数过多,请稍后再试", Toast.LENGTH_SHORT).show();
            }
        });
    }
  }

import android.app.Activity;
import android.support.v4.hardware.fingerprint.FingerprintManagerCompat;
import android.support.v4.os.CancellationSignal;

public class FingerHelper {

    private CancellationSignal signal;
    private FingerprintManagerCompat fingerprintManager;

    public FingerHelper(Activity activity) {
        signal = new CancellationSignal();
        fingerprintManager = FingerprintManagerCompat.from(activity);
    }

    public void startFingerPrintListen(FingerprintManagerCompat.AuthenticationCallback callback) {
        fingerprintManager.authenticate(null, 0, signal, callback, null);
    }
}