优化扫码枪支付
This commit is contained in:
mazengfei
@@ -5,7 +5,10 @@ import static android.content.Context.INPUT_SERVICE;
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import android.content.Context;
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import android.hardware.input.InputManager;
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import android.os.Handler;
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import android.os.Looper;
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import android.text.TextUtils;
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import android.view.InputDevice;
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import android.view.KeyCharacterMap;
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import android.view.KeyEvent;
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import java.util.Arrays;
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@@ -14,172 +17,185 @@ import java.util.List;
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/**
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* 扫描枪事件处理
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*/
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public class ScanGunKeyEventHelper {
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private final static long MESSAGE_DELAY = 500; //延迟500ms，判断扫码是否完成。
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private final StringBuffer mStringBufferResult; //扫码内容
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private boolean mCaps; //大小写区分
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private final Handler mHandler;
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private final Runnable mScanningFishedRunnable;
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private OnScanSuccessListener mOnScanSuccessListener;
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private final Context mContext;
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// private String mDeviceName = "TMC HIDKeyBoard";
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//private String mDeviceName = "Linux 3.4.35 with ak-hsudc Composite Gadget (ACM + HID)";
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//private String mDeviceName1 = "USBKey Chip USBKey Module";
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private static final long SCAN_DELAY = 200; // 扫码结束判断时间
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private String[] deviceNameArray = new String[]{
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"CROWN CROWN Barcode KeyBorad FS",
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"Linux 3.4.35 with ak-hsudc Composite Gadget (ACM + HID)",
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"USBKey Chip USBKey Module"
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};
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private long lastTime = 0L;
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private final StringBuilder resultBuffer = new StringBuilder();
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private boolean caps;
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public ScanGunKeyEventHelper(Context context, OnScanSuccessListener onScanSuccessListener) {
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mContext = context;
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mOnScanSuccessListener = onScanSuccessListener;
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mStringBufferResult = new StringBuffer();
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mHandler = new Handler();
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mScanningFishedRunnable = this::performScanSuccess;
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private final Handler handler = new Handler(Looper.getMainLooper());
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private final Runnable scanFinishRunnable;
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private OnScanSuccessListener listener;
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private long lastScanTime = 0;
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public ScanGunKeyEventHelper(OnScanSuccessListener listener) {
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this.listener = listener;
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scanFinishRunnable = this::handleScanFinish;
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}
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/**
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* 返回扫码成功后的结果
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* 扫码结束
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*/
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private void performScanSuccess() {
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String barcode = mStringBufferResult.toString();
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L.d("performScanSuccess barcode = " + barcode);
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long currentTime = System.currentTimeMillis();
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if (currentTime - lastTime < 5 * 1000) {
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L.d("performScanSuccess 操作太频繁");
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mStringBufferResult.setLength(0);
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private void handleScanFinish() {
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String barcode = resultBuffer.toString();
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if (barcode.isEmpty()) {
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return;
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}
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lastTime = currentTime;
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if (mOnScanSuccessListener != null && !TextUtils.isEmpty(barcode))
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mOnScanSuccessListener.onScanSuccess(barcode);
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mStringBufferResult.setLength(0);
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long now = System.currentTimeMillis();
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// 防止重复扫描
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if (now - lastScanTime < 1000) {
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resultBuffer.setLength(0);
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return;
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}
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lastScanTime = now;
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if (listener != null) {
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listener.onScanSuccess(barcode);
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}
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resultBuffer.setLength(0);
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}
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/**
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* 扫码枪事件解析
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*
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* @param event
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* 解析 KeyEvent
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*/
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public void analysisKeyEvent(KeyEvent event) {
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int keyCode = event.getKeyCode();
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//字母大小写判断
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checkLetterStatus(event);
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if (event.getAction() == KeyEvent.ACTION_DOWN) {
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char aChar = getInputCode(event);
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if (aChar != 0) {
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mStringBufferResult.append(aChar);
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}
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if (keyCode == KeyEvent.KEYCODE_ENTER) {
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//若为回车键，直接返回
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mHandler.removeCallbacks(mScanningFishedRunnable);
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mHandler.post(mScanningFishedRunnable);
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} else {
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//延迟post，若500ms内，有其他事件
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mHandler.removeCallbacks(mScanningFishedRunnable);
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mHandler.postDelayed(mScanningFishedRunnable, MESSAGE_DELAY);
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}
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if (event.getAction() != KeyEvent.ACTION_DOWN) {
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return;
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}
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checkCaps(event);
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int keyCode = event.getKeyCode();
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if (keyCode == KeyEvent.KEYCODE_ENTER) {
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handler.removeCallbacks(scanFinishRunnable);
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handler.post(scanFinishRunnable);
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return;
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}
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char c = getInputCode(event);
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if (c != 0) {
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resultBuffer.append(c);
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}
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handler.removeCallbacks(scanFinishRunnable);
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handler.postDelayed(scanFinishRunnable, SCAN_DELAY);
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}
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//检查shift键
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private void checkLetterStatus(KeyEvent event) {
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/**
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* 判断是否为扫码枪
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*/
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public boolean isScanGunEvent(KeyEvent event) {
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if (event == null) return false;
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InputDevice device = event.getDevice();
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if (device == null) return false;
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int sources = device.getSources();
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// HID keyboard
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boolean isKeyboard =
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(sources & InputDevice.SOURCE_KEYBOARD) == InputDevice.SOURCE_KEYBOARD;
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// 排除虚拟键盘
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boolean notVirtual =
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event.getDeviceId() != KeyCharacterMap.VIRTUAL_KEYBOARD;
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return isKeyboard && notVirtual;
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}
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/**
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* SHIFT 状态
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*/
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private void checkCaps(KeyEvent event) {
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int keyCode = event.getKeyCode();
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if (keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT || keyCode == KeyEvent.KEYCODE_SHIFT_LEFT) {
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if (event.getAction() == KeyEvent.ACTION_DOWN) {
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//按着shift键，表示大写
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mCaps = true;
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} else {
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//松开shift键，表示小写
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mCaps = false;
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}
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if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT
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|| keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT) {
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caps = event.getAction() == KeyEvent.ACTION_DOWN;
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}
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}
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/**
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* 获取扫描内容
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*
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* @param event
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* @return
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* KeyEvent 转字符
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*/
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private char getInputCode(KeyEvent event) {
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int keyCode = event.getKeyCode();
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char aChar;
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if (keyCode >= KeyEvent.KEYCODE_A && keyCode <= KeyEvent.KEYCODE_Z) {
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//字母
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aChar = (char) ((mCaps ? 'A' : 'a') + keyCode - KeyEvent.KEYCODE_A);
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return (char) ((caps ? 'A' : 'a') + keyCode - KeyEvent.KEYCODE_A);
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} else if (keyCode >= KeyEvent.KEYCODE_0 && keyCode <= KeyEvent.KEYCODE_9) {
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//数字
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aChar = (char) ('0' + keyCode - KeyEvent.KEYCODE_0);
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} else {
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//其他符号
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switch (keyCode) {
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case KeyEvent.KEYCODE_PERIOD:
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aChar = '.';
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break;
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case KeyEvent.KEYCODE_MINUS:
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aChar = mCaps ? '_' : '-';
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break;
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case KeyEvent.KEYCODE_SLASH:
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aChar = '/';
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break;
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case KeyEvent.KEYCODE_BACKSLASH:
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aChar = mCaps ? '|' : '\\';
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break;
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default:
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aChar = 0;
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break;
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}
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return (char) ('0' + keyCode - KeyEvent.KEYCODE_0);
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}
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return aChar;
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switch (keyCode) {
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case KeyEvent.KEYCODE_MINUS:
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return caps ? '_' : '-';
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case KeyEvent.KEYCODE_EQUALS:
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return caps ? '+' : '=';
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case KeyEvent.KEYCODE_LEFT_BRACKET:
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return caps ? '{' : '[';
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case KeyEvent.KEYCODE_RIGHT_BRACKET:
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return caps ? '}' : ']';
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case KeyEvent.KEYCODE_BACKSLASH:
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return caps ? '|' : '\\';
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case KeyEvent.KEYCODE_SEMICOLON:
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return caps ? ':' : ';';
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case KeyEvent.KEYCODE_APOSTROPHE:
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return caps ? '"' : '\'';
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case KeyEvent.KEYCODE_COMMA:
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return caps ? '<' : ',';
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case KeyEvent.KEYCODE_PERIOD:
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return caps ? '>' : '.';
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case KeyEvent.KEYCODE_SLASH:
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return caps ? '?' : '/';
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case KeyEvent.KEYCODE_SPACE:
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return ' ';
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default:
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return 0;
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}
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}
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public void release() {
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handler.removeCallbacks(scanFinishRunnable);
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listener = null;
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}
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public interface OnScanSuccessListener {
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void onScanSuccess(String barcode);
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}
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public void onDestroy() {
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mHandler.removeCallbacks(mScanningFishedRunnable);
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mOnScanSuccessListener = null;
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}
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/**
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* 输入设备是否存在
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*
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* @param deviceName
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* @return
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*/
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public boolean isInputDeviceExist(String deviceName) {
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InputManager inputManager = (InputManager) mContext.getSystemService(INPUT_SERVICE);
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int[] deviceIds = inputManager.getInputDeviceIds();
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for (int id : deviceIds) {
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if (inputManager.getInputDevice(id).getName().equals(deviceName)) {
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return true;
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}
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}
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return false;
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}
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/**
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* 是否为扫码枪事件(部分机型KeyEvent获取的名字错误)
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*
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* @param event
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* @return
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*/
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public boolean isScanGunEvent(KeyEvent event) {
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if (event == null || event.getDevice() == null) return false;
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String deviceName = event.getDevice().getName();
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L.e("event===" + deviceName +
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"===Char===" + event.getCharacters() +
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"===Action===" + event.getAction());
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//return deviceName.equals(mDeviceName) || deviceName.equals(mDeviceName1);
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List<String> devices = Arrays.asList(deviceNameArray);
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return devices.contains(deviceName);
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}
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}
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}
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