安卓对接扫码枪扫码枪模拟键盘输入方案一在页面添加个隐藏的input 框在input框内获取值来得到扫码枪的值。 获取焦点软键盘弹出不易隐藏。方案二标准扫描枪扫描数据会触发KEYCODE_ENTER键感兴趣的同学可以在onKeyEvent函数里打log看看这个扫描过程中 出发的keyCode和条形码或二维码内容比较。重写 onKeyDownimport android.os.Bundle; import android.view.KeyEvent; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity implements ScannerGunManager.OnScanListener { TextView barcodeView; Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); barcodeView findViewById(R.id.barcode); ScannerGunManager.getInstance().setScanListener(this); } Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode KeyEvent.KEYCODE_HOME) { return true; } boolean ret super.onKeyDown(keyCode, event); ScannerGunManager.getInstance().dispatchKeyEvent(keyCode, event); return ret; } Override public boolean dispatchKeyEvent(KeyEvent event) { // 优先处理扫码器事件 boolean isScannerEvent ScannerGunManager.getInstance().dispatchKeyEvent(event.getKeyCode(), event); Log.d(Scanner, 是否扫码事件 isScannerEvent); if (isScannerEvent) { return true; // 完全阻断事件传递 } // 其他全局按键处理如HOME键 if (event.getKeyCode() KeyEvent.KEYCODE_HOME event.getAction() KeyEvent.ACTION_DOWN) { return true; } return super.dispatchKeyEvent(event); } Override public void onResult(final String code) { runOnUiThread(new Runnable() { Override public void run() { barcodeView.setText(code); } }); } }ScannerGunManager.javaimport android.os.Handler; import android.text.TextUtils; import android.view.KeyEvent; import java.util.ArrayList; public class ScannerGunManager { private ArrayListInteger scannedCodes new ArrayListInteger(); private final static long MESSAGE_DELAY 1000; private final Handler mHandler; private Runnable mScanningFinishRunnable new Runnable() { Override public void run() { handleKeyCodes(); } }; public interface OnScanListener { void onResult(String code); } private OnScanListener listener; private volatile static ScannerGunManager sInstance; private ScannerGunManager() { mHandler new Handler(); } public static ScannerGunManager getInstance() { if (sInstance null) { synchronized (ScannerGunManager.class) { if (sInstance null) { sInstance new ScannerGunManager(); } } } return sInstance; } public String keyCodeToChar(int code, boolean isShift) { switch (code) { case KeyEvent.KEYCODE_SHIFT_LEFT: case KeyEvent.KEYCODE_SHIFT_RIGHT: case KeyEvent.KEYCODE_SPACE: case KeyEvent.KEYCODE_DPAD_DOWN: case KeyEvent.KEYCODE_DPAD_UP: return ; case KeyEvent.KEYCODE_0: return isShift ? ) : 0; case KeyEvent.KEYCODE_1: return isShift ? ! : 1; case KeyEvent.KEYCODE_2: return isShift ? : 2; case KeyEvent.KEYCODE_3: return isShift ? # : 3; case KeyEvent.KEYCODE_4: return isShift ? $ : 4; case KeyEvent.KEYCODE_5: return isShift ? % : 5; case KeyEvent.KEYCODE_6: return isShift ? ^ : 6; case KeyEvent.KEYCODE_7: return isShift ? : 7; case KeyEvent.KEYCODE_8: return isShift ? * : 8; case KeyEvent.KEYCODE_9: return isShift ? ( : 9; case KeyEvent.KEYCODE_A: return isShift ? A : a; case KeyEvent.KEYCODE_B: return isShift ? B : b; case KeyEvent.KEYCODE_C: return isShift ? C : c; case KeyEvent.KEYCODE_D: return isShift ? D : d; case KeyEvent.KEYCODE_E: return isShift ? E : e; case KeyEvent.KEYCODE_F: return isShift ? F : f; case KeyEvent.KEYCODE_G: return isShift ? G : g; case KeyEvent.KEYCODE_H: return isShift ? H : h; case KeyEvent.KEYCODE_I: return isShift ? I : i; case KeyEvent.KEYCODE_J: return isShift ? J : j; case KeyEvent.KEYCODE_K: return isShift ? K : k; case KeyEvent.KEYCODE_L: return isShift ? L : l; case KeyEvent.KEYCODE_M: return isShift ? M : m; case KeyEvent.KEYCODE_N: return isShift ? N : n; case KeyEvent.KEYCODE_O: return isShift ? O : o; case KeyEvent.KEYCODE_P: return isShift ? P : p; case KeyEvent.KEYCODE_Q: return isShift ? Q : q; case KeyEvent.KEYCODE_R: return isShift ? R : r; case KeyEvent.KEYCODE_S: return isShift ? S : s; case KeyEvent.KEYCODE_T: return isShift ? T : t; case KeyEvent.KEYCODE_U: return isShift ? U : u; case KeyEvent.KEYCODE_V: return isShift ? V : v; case KeyEvent.KEYCODE_W: return isShift ? W : w; case KeyEvent.KEYCODE_X: return isShift ? X : x; case KeyEvent.KEYCODE_Y: return isShift ? Y : y; case KeyEvent.KEYCODE_Z: return isShift ? Z : z; case KeyEvent.KEYCODE_COMMA: return isShift ? : ,; case KeyEvent.KEYCODE_PERIOD: return isShift ? : .; case KeyEvent.KEYCODE_SLASH: return isShift ? ? : /; case KeyEvent.KEYCODE_BACKSLASH: return isShift ? | : \\; case KeyEvent.KEYCODE_APOSTROPHE: return isShift ? \ : ; case KeyEvent.KEYCODE_SEMICOLON: return isShift ? : : ;; case KeyEvent.KEYCODE_LEFT_BRACKET: return isShift ? { : [; case KeyEvent.KEYCODE_RIGHT_BRACKET: return isShift ? } : ]; case KeyEvent.KEYCODE_GRAVE: return isShift ? ~ : ; case KeyEvent.KEYCODE_EQUALS: return isShift ? : ; case KeyEvent.KEYCODE_MINUS: return isShift ? _ : -; case KeyEvent.KEYCODE_NUMPAD_SUBTRACT: return -; case KeyEvent.KEYCODE_NUMPAD_DIVIDE: return /; case KeyEvent.KEYCODE_NUMPAD_MULTIPLY: return *; case KeyEvent.KEYCODE_NUMPAD_DOT: return .; case KeyEvent.KEYCODE_NUMPAD_ADD: return ; case KeyEvent.KEYCODE_NUMPAD_COMMA: return ,; case KeyEvent.KEYCODE_NUMPAD_EQUALS: return ; case KeyEvent.KEYCODE_NUMPAD_LEFT_PAREN: return (; case KeyEvent.KEYCODE_NUMPAD_RIGHT_PAREN: return ); default: return ?; } } private void handleKeyCodes() { int count scannedCodes.size(); if (count 0) { return; } String result ; boolean hasShift false; for (int keyCode : scannedCodes) { result keyCodeToChar(keyCode, hasShift); hasShift (keyCode KeyEvent.KEYCODE_SHIFT_LEFT); } if (!TextUtils.isEmpty(result) listener ! null) { listener.onResult(result); } scannedCodes.clear(); } public boolean dispatchKeyEvent(int keyCode, KeyEvent event) { if (event.getDeviceId() -1) { return false; } if (keyCode ! KeyEvent.KEYCODE_ENTER) { scannedCodes.add(keyCode); mHandler.removeCallbacks(mScanningFinishRunnable); mHandler.postDelayed(mScanningFinishRunnable, MESSAGE_DELAY); } else { mHandler.removeCallbacks(mScanningFinishRunnable); handleKeyCodes(); } return true; } public void setScanListener(OnScanListener listener) { this.listener listener; } }