android 6.0 指紋識别調用 Demo

activity_main.xml源碼

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.liu.finger.MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_activity_main_finger"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/textView"
        android:layout_marginTop="54dp"
        android:text="指紋識别" />
</LinearLayout>
           

MainActivity.java源碼

package com.liu.finger;

import android.Manifest;
import android.app.KeyguardManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.hardware.fingerprint.FingerprintManager;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;



public class MainActivity extends FragmentActivity {
    FingerprintManager manager;
    KeyguardManager mKeyManager;
    private final static int REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS = 0;
    private final static String TAG = "finger_log";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        manager = (FingerprintManager) this.getSystemService(Context.FINGERPRINT_SERVICE);
        mKeyManager = (KeyguardManager) this.getSystemService(Context.KEYGUARD_SERVICE);
        Button btn_finger = (Button) findViewById(R.id.btn_activity_main_finger);
        btn_finger.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (isFinger()) {
                    Toast.makeText(MainActivity.this, "請進行指紋識别", Toast.LENGTH_LONG).show();
                    Log(TAG, "keyi");
                    startListening(null);
                }
            }
        });

    }

    public boolean isFinger() {

        //android studio 上，沒有這個會報錯
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this, "沒有指紋識别權限", Toast.LENGTH_SHORT).show();
            return false;
        }
        Log(TAG, "有指紋權限");
        //判斷硬體是否支援指紋識别
        if (!manager.isHardwareDetected()) {
            Toast.makeText(this, "沒有指紋識别子產品", Toast.LENGTH_SHORT).show();
            return false;
        }
     Log(TAG, "有指紋子產品");
        //判斷 是否開啟鎖屏密碼

        if (!mKeyManager.isKeyguardSecure()) {
            Toast.makeText(this, "沒有開啟鎖屏密碼", Toast.LENGTH_SHORT).show();
            return false;
        }
        Log(TAG, "已開啟鎖屏密碼");
        //判斷是否有指紋錄入
        if (!manager.hasEnrolledFingerprints()) {
            Toast.makeText(this, "沒有錄入指紋", Toast.LENGTH_SHORT).show();
            return false;
        }
       Log(TAG, "已錄入指紋");

        return true;
    }

    CancellationSignal mCancellationSignal = new CancellationSignal();
    //回調方法
    FingerprintManager.AuthenticationCallback mSelfCancelled = new FingerprintManager.AuthenticationCallback() {
        @Override
        public void onAuthenticationError(int errorCode, CharSequence errString) {
            //但多次指紋密碼驗證錯誤後，進入此方法；并且，不能短時間内調用指紋驗證
            Toast.makeText(MainActivity.this, errString, Toast.LENGTH_SHORT).show();
            showAuthenticationScreen();
        }

        @Override
        public void onAuthenticationHelp(int helpCode, CharSequence helpString) {

            Toast.makeText(MainActivity.this, helpString, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {

            Toast.makeText(MainActivity.this, "指紋識别成功", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onAuthenticationFailed() {
            Toast.makeText(MainActivity.this, "指紋識别失敗", Toast.LENGTH_SHORT).show();
        }
    };


    public void startListening(FingerprintManager.CryptoObject cryptoObject) {
        //android studio 上，沒有這個會報錯
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this, "沒有指紋識别權限", Toast.LENGTH_SHORT).show();
            return;
        }
        manager.authenticate(cryptoObject, mCancellationSignal, 0, mSelfCancelled, null);


    }

    /**
     * 鎖屏密碼
     */
    private void showAuthenticationScreen() {

        Intent intent = mKeyManager.createConfirmDeviceCredentialIntent("finger", "測試指紋識别");
        if (intent != null) {
            startActivityForResult(intent, REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {
            // Challenge completed, proceed with using cipher
            if (resultCode == RESULT_OK) {
                Toast.makeText(this, "識别成功", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "識别失敗", Toast.LENGTH_SHORT).show();
            }
        }
    }

    private void Log(String tag, String msg) {
        Log.d(tag, msg);
    }
}