Android(安卓)扫码盒子全局接收付款码（全局事件&上层接收&多重下发）

实现MainActivity，然后接收到的内容，通过接口回调，依次下发到各个业务

还有另一种用EditText接收付款码的方式，地址：https://blog.csdn.net/qq_39731011/article/details/106383787

    String barcode = "";  // 收到的码结果    String check = "0000";   //特殊码前缀 如：核销码    @Override    public boolean dispatchKeyEvent(KeyEvent event) {        if(event.getAction()==KeyEvent.ACTION_DOWN){            Log.e("dispatchKeyEvent","dispatchKeyEvent: "+event.toString());            char pressedKey = (char) event.getUnicodeChar();            barcode += pressedKey;            Log.e("dispatchKeyEvent","barcode: "+barcode);        }        if (event.getAction()==KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_ENTER) {            Log.e("dispatchKeyEvent","barcode最后: "+barcode);            //  Toast.makeText(MainActivity.this,barcode,Toast.LENGTH_LONG).show();            if(scanKeyManager!=null){                String str = barcode.trim().replace("\n","");                Log.e("付款码：", str + "");//check78787                if (str.length() == 18) {//1346 0952 2362 9255 02                    if (scanKeyManager != null && !str.startsWith(check)){                        scanKeyManager.analysisKeyEvent(str);                    }                }            }else{                if(barcode.startsWith(check)){                    getOrderEnsure(barcode.substring(4).replace("\n",""));                }            }            barcode="";        }        return super.dispatchKeyEvent(event);    }

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