android 指纹验证api

通过FingerPrintManager可以验证指纹的对错，实例代码：
package com.example.administrator.mywork;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.hardware.fingerprint.FingerprintManagerCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
private FingerprintManagerCompat manager;
private Context mContext = MainActivity.this;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    manager = FingerprintManagerCompat.from(this);

    findViewById(R.id.btn_check).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            manager.authenticate(null, 0, null, new MyCallBack(), null);
        }
    });

}

public class MyCallBack extends FingerprintManagerCompat.AuthenticationCallback {
    private static final String TAG = "MyCallBack";

    // 当出现错误的时候回调此函数，比如多次尝试都失败了的时候，errString是错误信息
    @Override
    public void onAuthenticationError(int errMsgId, CharSequence errString) {
        Log.d(TAG, "onAuthenticationError: " + errString);
        Toast.makeText(mContext, "onAuthenticationError: " + errString, Toast.LENGTH_LONG).show();
    }

    // 当指纹验证失败的时候会回调此函数，失败之后允许多次尝试，失败次数过多会停止响应一段时间然后再停止sensor的工作
    @Override
    public void onAuthenticationFailed() {
        Log.d(TAG, "onAuthenticationFailed: " + "验证失败");
        Toast.makeText(mContext, "onAuthenticationFailed: " + "验证失败", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
        Log.d(TAG, "onAuthenticationHelp: " + helpString);
        Toast.makeText(mContext, "onAuthenticationHelp: " + helpString, Toast.LENGTH_LONG).show();
    }

    // 当验证的指纹成功时会回调此函数，然后不再监听指纹sensor
    @Override
    public void onAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult
                                                  result) {
        Log.d(TAG, "onAuthenticationSucceeded: " + "验证成功");
        Toast.makeText(mContext, "onAuthenticationSucceeded: " + "验证成功", Toast.LENGTH_LONG).show();
    }
}

}

FingerPrintManager目前只能做到验证指纹对错，不能录入指纹，录入api还没开放。