android M 指纹api小示例

最近有个android M 项目上加入了指纹器件，需要测试指纹的录入和解锁，看了下M 自带的api后简单的做了实现。
主要是frameworks/base/core/java/android/hardware/fingerprint下的FingerprintManager类。
还有就是/frameworks/base/services/core/java/com/android/server/fingerprint下的FingerprintService.java
源码：
package xxxx.xxx.xxxximport android.app.Activity;import android.view.KeyEvent;import android.content.pm.ActivityInfo;import android.content.Intent;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Bundle;import android.os.SystemProperties;import android.os.Handler;import android.os.Message;import android.os.PowerManager;import android.util.DisplayMetrics;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.Toast;import android.content.Context;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.TextView;import android.hardware.fingerprint.Fingerprint;import android.hardware.fingerprint.FingerprintManager;import android.hardware.fingerprint.FingerprintManager.AuthenticationCallback;import android.hardware.fingerprint.FingerprintManager.AuthenticationResult;import android.hardware.fingerprint.FingerprintManager.RemovalCallback;import android.os.CancellationSignal;import java.util.List;import android.os.Vibrator;public class TestFingerPrint extends Activity implements View.OnClickListener {    private static final String TAG = "TestFingerPrint";    private RoundProgressBar enrollRoundPrg;//my progressbar,you can also define yours    private boolean mEnrolling;    private static Handler mOutHandler = null;    private int ID = -1;    private String mResult = null;    private int pass = 0;    private PowerManager.WakeLock mWakeLock;    private boolean mbStarted = false;    private Button mPass = null;    private Button mFail = null;    private Button mReset = null;    private byte[] mToken = new byte[69];//i hate this    private Vibrator mVibrator;    private FingerprintManager mFingerprintManager;    private CancellationSignal mEnrollmentCancel;    public static void setHandler(Handler handler) {        mOutHandler = handler;    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);        DisplayMetrics mDisplayMetrics = new DisplayMetrics();        getWindowManager().getDefaultDisplay().getMetrics(mDisplayMetrics);        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);        Intent intent = getIntent();        if (intent != null) {            ID = intent.getIntExtra("ID", 0);        }        setContentView(R.layout.finger_print);        mPass = (Button) findViewById(R.id.fp_pass);        mFail = (Button) findViewById(R.id.fp_fail);        mReset = (Button) findViewById(R.id.fp_reset);        mPass.setOnClickListener(this);        mFail.setOnClickListener(this);        mReset.setOnClickListener(this);        buttonShow(false,false,false);        if (mOutHandler != null) {            Message msg = mOutHandler                    .obtainMessage(FactoryTestMessage.MSG_OPEN_UI_OK);            msg.arg1 = (int) ID;            mOutHandler.sendMessage(msg);        }        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);        mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, TAG);        mVibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);        mFingerprintManager = (FingerprintManager) this.getSystemService(Context.FINGERPRINT_SERVICE);        enrollRoundPrg = (RoundProgressBar) findViewById(R.id.enrollPrg_roundProgressBar);    }    private void startFingerPrintTest() {        clearEnrolledFingerPrint();        enrollStart();    }    private void enrollStart() {//check device functional well or not        if (mFingerprintManager.isHardwareDetected()) {            Toast.makeText(this, "has fingerprint device", Toast.LENGTH_SHORT).show();        } else {            Toast.makeText(this, "no fingerprint device", Toast.LENGTH_SHORT).show();        }        mEnrollmentCancel = new CancellationSignal();        mFingerprintManager.enroll(mToken, mEnrollmentCancel, 0, mEnrollmentCallback);        mEnrolling = true;    }    private void doVerified(int flag) {        mFingerprintManager.authenticate(null, null, flag, mAuthenticationCallback, null);        long mid = mFingerprintManager.getAuthenticatorId();        Log.d(TAG, "mid = " + mid);    }    private void clearEnrolledFingerPrint() {//clear all fingerprints when in & out our test        final List items = mFingerprintManager.getEnrolledFingerprints();        if (items.size() > 0) {            Log.d(TAG, "Fingerprint = " + items.size());            for (Fingerprint i : items) {                mFingerprintManager.remove(i, mRemovalCallback);            }        }    }    @Override    protected void onStart() {        super.onStart();        startFingerPrintTest();    }    @Override    protected void onResume() {        super.onResume();        mWakeLock.acquire();    }    @Override    protected void onDestroy() {        super.onDestroy();        mWakeLock.release();        clearEnrolledFingerPrint();    }    public void onClick(View v) {        int msg_id = 0;        if (v == mPass) {            pass = 1;            mResult = "FingerPrint Test Pass";            buttonShow(false,false,false);            msg_id = FactoryTestMessage.MSG_ITEM_TEST_OK;            sendMessage(msg_id);            finish();        } else if (v == mFail) {            pass = 2;            mResult = "FingerPrint Test Fail";            if (FactoryItemManager.isSingleTest()) {                msg_id = FactoryTestMessage.MSG_ITEM_TEST_OK;                sendMessage(msg_id);                finish();            }        } else if (v == mReset) {            buttonShow(false,false,false);            if (FactoryItemManager.getItemResetTime(ID) >= 5){// five times reset                Toast.makeText(this, R.string.reset_times, Toast.LENGTH_LONG).show();            } else {                mResult = "reset";                sendMessage(FactoryTestMessage.MSG_ITEM_TEST_RESET);                setDialogProgress(0);                enrollRoundPrg.doBeginEnrollAnimation();                startFingerPrintTest();            }        }    }    private void sendMessage(int msg_id) {//send test result        Message msg = mOutHandler.obtainMessage(msg_id);        msg.arg1 = (int) ID;        msg.arg2 = (int) pass;        msg.obj = (String) mResult;        mOutHandler.sendMessage(msg);    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        //back button or not        if (keyCode == KeyEvent.KEYCODE_BACK) {            if ((FactoryItemManager.isSingleTest())                    || (FactoryItemManager.getItemResetTime(ID) >= 5)) {                Log.d(TAG, " onKeyDown: back key is pressed");                pass = 0;                sendMessage(FactoryTestMessage.MSG_ITEM_TEST_OK);                finish();            }            return true;        }        return super.onKeyDown(keyCode, event);    }    private void buttonShow(boolean passBt,boolean resetBt,boolean failBt){        mPass.setEnabled(passBt);        mReset.setEnabled(resetBt);        mFail.setEnabled(failBt);    }    private void setDialogProgress(int progress) {//update progress bar when enrolling        if (progress >= 0 && progress <= 100) {            enrollRoundPrg.setProgress(progress);            if (progress == 100) {                enrollRoundPrg.doEnrollSuccessAnimation();            }        }    }    private FingerprintManager.EnrollmentCallback mEnrollmentCallback            = new FingerprintManager.EnrollmentCallback() {        @Override        public void onEnrollmentProgress(int remaining) {//must enroll 14 times & i don't know why            Log.d(TAG,"onEnrollmentProgress  remaining = " + remaining);            if (0 == remaining) {                setDialogProgress(100);                doVerified(0);//enroll completed and start match            } else {                setDialogProgress((14 - remaining) * 7);//update progressbar while enrolling            }        }        @Override        public void onEnrollmentHelp(int helpMsgId, CharSequence helpString) {            Log.d(TAG,"onEnrollmentHelp  helpMsgId = " + helpMsgId + "helpString = " + helpString);        }        @Override        public void onEnrollmentError(int errMsgId, CharSequence errString) {            Log.d(TAG,"onEnrollmentError  errMsgId = " + errMsgId + "errString = " + errString);            if (errMsgId == 7) {//match fail,it will lockout for some time maybe 30s                enrollRoundPrg.doIdentifyFailAnimation();                buttonShow(false,true,true);                mFingerprintManager.resetTimeout(mToken); //Reset the lockout timer when asked to do so            }        }    };    private FingerprintManager.AuthenticationCallback mAuthenticationCallback            = new FingerprintManager.AuthenticationCallback() {        public void onAuthenticationError(int errorCode, CharSequence errString) {             Log.d(TAG,"onAuthenticationError");        }        public void onAuthenticationHelp(int helpCode, CharSequence helpString) { }        public void onAuthenticationSucceeded(AuthenticationResult result) {            Log.d(TAG,"onAuthenticationSucceeded");            enrollRoundPrg.doIdentifySuccessAnimation();//match success            buttonShow(true,true,true);        }        public void onAuthenticationFailed() {            Log.d(TAG,"onAuthenticationFailed");        }        public void onAuthenticationAcquired(int acquireInfo) {}    };    private FingerprintManager.RemovalCallback mRemovalCallback            = new FingerprintManager.RemovalCallback() {        public void onRemovalError(Fingerprint fp, int errMsgId, CharSequence errString) { }        public void onRemovalSucceeded(Fingerprint fingerprint) {            Log.d(TAG,"onRemovalSucceeded");        }    };}
另外注意上面使用到了几个权限需要加上
实现的功能比较简单，但指纹的基本功能都在里面，callback里面的状态比较多，都有Log打印出来的，关注你需要的就好了
原创文章，转载请说明出处，谢谢！
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