安卓扫码枪的问题
2019-10-24 本文已影响0人
仕明同学
- 扫码枪等于输入设备
- 在
Activity监听
override fun dispatchKeyEvent(event: KeyEvent?): Boolean {
println("shiming MainActivity 扫码枪 dispatchKeyEvent= ")
val mainActivity = this
when (event?.action) {
KeyEvent.ACTION_DOWN -> {
val unicodeChar = event.unicodeChar
mQRMsg.append(unicodeChar.toChar())
if (event.keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
return super.dispatchKeyEvent(event)
}
if (event.keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
return super.dispatchKeyEvent(event)
}
if (event.keyCode == KeyEvent.KEYCODE_BACK) {
return super.dispatchKeyEvent(event)
}
if (event.keyCode == KeyEvent.KEYCODE_MENU) {
return super.dispatchKeyEvent(event)
}
if (event.keyCode == KeyEvent.KEYCODE_HOME) {
return super.dispatchKeyEvent(event)
}
if (event.keyCode == KeyEvent.KEYCODE_POWER) {
return super.dispatchKeyEvent(event)
}
val len = mQRMsg.length
Observable.just("ARMSG").delay(200, TimeUnit.MILLISECONDS)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(object : io.reactivex.Observer<String> {
override fun onSubscribe(d: Disposable) {
}
override fun onNext(value: String) {
}
override fun onError(e: Throwable) {
}
override fun onComplete() {
if (len != mQRMsg.length) return
if (mQRMsg.isNotEmpty()) {
//去除杂质符号
val code = mQRMsg.toString().replace("[^0-9a-zA-Z]".toRegex(), "")
EventBusActivityScope.getDefault(mainActivity)
.post(BarCodeScanningGun(code))
ToastNativeLayoutUtils.toast("扫描枪的东西 MainA"+mQRMsg)
mQRMsg.setLength(0)
}
}
})
return true
}
}
return super.dispatchKeyEvent(event)
}
- 但是在
Activity有Dialog弹出的话，就会监听不到 - 1、这个
Dialog中dispatchKeyEvent方法行不通 ，也有可能我的姿势不对
/* 监听*/
// private StringBuffer mQRMsg = new StringBuffer();
// @Override
// public boolean dispatchKeyEvent(@NonNull KeyEvent event) {
//
//// switch (event.getKeyCode()) {
//// case KeyEvent.ACTION_DOWN:
//// int unicodeChar = event.getUnicodeChar();
//// mQRMsg.append((char) unicodeChar);
//// String code = mQRMsg.toString().replace("[^0-9a-zA-Z]", "");
//// ToastNativeLayoutUtils.INSTANCE.toast("扫描枪的东西 dispatchKeyEvent "+code);
//// mQRMsg.setLength(0);
//// return super.dispatchKeyEvent(event);
//// }
// System.out.println("");
// int unicodeChar = event.getUnicodeChar();
// mQRMsg.append((char) unicodeChar);
// String code = mQRMsg.toString().replace("[^0-9a-zA-Z]", "");
// ToastNativeLayoutUtils.INSTANCE.toast("扫描枪的东西 dispatchKeyEvent "+code);
// System.out.println("shiming code=="+code);
// mQRMsg.setLength(0);
// return super.dispatchKeyEvent(event);
// }
- 2、这个
Dialog中 正确的回调
mWaitingForCustomerDialog?.setOnKeyListener(object :DialogInterface.OnKeyListener{
override fun onKey(p0: DialogInterface?, p1: Int, event: KeyEvent?): Boolean {
when ( event?.action) {
KeyEvent.ACTION_DOWN -> {
val unicodeChar = event.unicodeChar
mQRMsg.append(unicodeChar.toChar())
if (event.keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
return false
}
if (event.keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
return false
}
if (event.keyCode == KeyEvent.KEYCODE_BACK) {
return false
}
if (event.keyCode == KeyEvent.KEYCODE_MENU) {
return false
}
if (event.keyCode == KeyEvent.KEYCODE_HOME) {
return false
}
if (event.keyCode == KeyEvent.KEYCODE_POWER) {
return false
}
val len = mQRMsg.length
Observable.just("ARMSG").delay(200, TimeUnit.MILLISECONDS)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(object : io.reactivex.Observer<String> {
override fun onSubscribe(d: Disposable) {
}
override fun onNext(value: String) {
}
override fun onError(e: Throwable) {
}
override fun onComplete() {
if (len != mQRMsg.length) return
if (mQRMsg.isNotEmpty()) {
//去除杂质符号
val code = mQRMsg.toString().replace("[^0-9a-zA-Z]".toRegex(), "")
ToastNativeLayoutUtils.toast("扫描枪的东西code: "+code)
if (mWaitingForCustomerDialog?.isShowing!!){
mWaitingForCustomerDialog?.dismiss()
}
mQRMsg.setLength(0)
}
}
})
}
}
return true
}
})
