android 6.0 指纹识别调用 Demo

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activity_main.xml源码

<?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="指纹识别" /></LinearLayout>

MainActivity.java源码

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, "请进行指纹识别", Toast.LENGTH_LONG).show();                    Log(TAG, "keyi");                    startListening(null);                }            }        });    }    public boolean isFinger() {        //android studio 上，没有这个会报错        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {            Toast.makeText(this, "没有指纹识别权限", Toast.LENGTH_SHORT).show();            return false;        }        Log(TAG, "有指纹权限");        //判断硬件是否支持指纹识别        if (!manager.isHardwareDetected()) {            Toast.makeText(this, "没有指纹识别模块", Toast.LENGTH_SHORT).show();            return false;        }     Log(TAG, "有指纹模块");        //判断 是否开启锁屏密码        if (!mKeyManager.isKeyguardSecure()) {            Toast.makeText(this, "没有开启锁屏密码", Toast.LENGTH_SHORT).show();            return false;        }        Log(TAG, "已开启锁屏密码");        //判断是否有指纹录入        if (!manager.hasEnrolledFingerprints()) {            Toast.makeText(this, "没有录入指纹", Toast.LENGTH_SHORT).show();            return false;        }       Log(TAG, "已录入指纹");        return true;    }    CancellationSignal mCancellationSignal = new CancellationSignal();    //回调方法    FingerprintManager.AuthenticationCallback mSelfCancelled = new FingerprintManager.AuthenticationCallback() {        @Override        public void onAuthenticationError(int errorCode, 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(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();        }    };    public void startListening(FingerprintManager.CryptoObject cryptoObject) {        //android studio 上，没有这个会报错        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {            Toast.makeText(this, "没有指纹识别权限", Toast.LENGTH_SHORT).show();            return;        }        manager.authenticate(cryptoObject, mCancellationSignal, 0, mSelfCancelled, null);    }    /**     * 锁屏密码     */    private void showAuthenticationScreen() {        Intent intent = mKeyManager.createConfirmDeviceCredentialIntent("finger", "测试指纹识别");        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, "识别成功", Toast.LENGTH_SHORT).show();            } else {                Toast.makeText(this, "识别失败", Toast.LENGTH_SHORT).show();            }        }    }    private void Log(String tag, String msg) {        Log.d(tag, msg);    }}

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