将AsyncTask转换为RxJava(Android)
我有一些代码:将AsyncTask转换为RxJava(Android),java,android,rx-java,Java,Android,Rx Java,我有一些代码: class WorkEngineTask extends AsyncTask<Void, RecognitionResult, Void> { @Override protected Void doInBackground(Void... unused) { while (true) { try { frameReady.acquire(
class WorkEngineTask extends AsyncTask<Void, RecognitionResult, Void> {
@Override
protected Void doInBackground(Void... unused) {
while (true) {
try {
frameReady.acquire(); // waiting for the frame
if (!processing) {
break;
}
Camera.Size size = camera.getParameters().getPreviewSize();
RecognitionResult result;
switch (mAngle) {
case 0:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.Landscape);
break;
case 180:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.InvertedLandscape);
break;
case 270:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.InvertedPortrait);
break;
default:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.Portrait);
}
publishProgress(result); // show current result
} catch (Exception e) {
}
}
return null;
}
@Override
protected void onProgressUpdate(RecognitionResult... res) {
RecognitionResult result = res[0];
}
}
class WorkEngineTask扩展异步任务{
@凌驾
受保护的空位背景(空位…未使用){
while(true){
试一试{
frameReady.acquire();//正在等待帧
如果(!处理){
打破
}
Camera.Size Size=Camera.getParameters().getPreviewSize();
识别结果;
开关(槽){
案例0:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.scape);
打破
案例180:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.inversedlandscape);
打破
案例270:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.InvertedPortrait);
打破
违约:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.crative);
}
publishProgress(结果);//显示当前结果
}捕获(例外e){
}
}
返回null;
}
@凌驾
受保护的void onProgressUpdate(识别结果…res){
识别结果=res[0];
}
}
我需要将其转换为rxJava代码。我想写一些代码。这是我的密码:
public void workEngine() {
Observable.create((ObservableOnSubscribe<RecognitionResult>) emitter -> {
while (true) {
try {
frameReady.acquire(); // waiting for the frame
if (!processing) {
break;
}
Camera.Size size = camera.getParameters().getPreviewSize();
RecognitionResult result;
switch (mAngle) {
case 0:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.Landscape);
break;
case 180:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.InvertedLandscape);
break;
case 270:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.InvertedPortrait);
break;
default:
result = session.ProcessYUVSnapshot(mData, size.width, size.height, ImageOrientation.Portrait);
}
emitter.onNext(result);
} catch (Exception e) {
String message = "Error while processing frame: " + e.toString();
Log.d("smartid", message);
callback.error(message);
}
}
}).observeOn(Schedulers.io())
.subscribeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<RecognitionResult>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(RecognitionResult recognitionResult) {
draw.showResult(recognitionResult);
draw.invalidate();
callback.recognized(recognitionResult);
frameWaiting.release();
}
@Override
public void onComplete() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
});
}
public void workEngine(){
可观察。创建((可观察订阅)发射器->{
while(true){
试一试{
frameReady.acquire();//正在等待帧
如果(!处理){
打破
}
Camera.Size Size=Camera.getParameters().getPreviewSize();
识别结果;
开关(槽){
案例0:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.scape);
打破
案例180:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.inversedlandscape);
打破
案例270:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.InvertedPortrait);
打破
违约:
结果=session.ProcessYUVSnapshot(mData、size.width、size.height、ImageOrientation.crative);
}
emitter.onNext(结果);
}捕获(例外e){
String message=“处理帧时出错:”+e.toString();
Log.d(“smartid”,消息);
回调错误(消息);
}
}
}).observeOn(Schedulers.io())
.subscribeOn(AndroidSchedulers.mainThread())
.订阅(新观察员){
@凌驾
认购的公共无效(一次性d){
}
@凌驾
public void onNext(识别结果识别结果){
draw.showResult(识别结果);
draw.invalidate();
回调。已识别(识别结果);
frameWaiting.release();
}
@凌驾
未完成的公共空间(){
}
@凌驾
公共无效申报人(可丢弃的e){
e、 printStackTrace();
}
});
}
但这对我不起作用。我是Android新手,从来没有使用过异步任务,现在也不想使用它。我试了很多次,但都无济于事。我不明白我做错了什么。请帮助我解决此问题。无论您在AsyncTask中处理结果做了什么,都应该在onNext()中执行;即观察到干扰结果时。然后,一旦没有要发射的内容,就会调用onComplete()。所以清理工作应该在那里进行,比如释放电话。如果出现错误时需要记录日志之类的东西,可以在onError()中执行
@Override
public void onNext(RecognitionResult recognitionResult) {
//This doesn't match what you did in the AsyncTask above
draw.showResult(recognitionResult);
draw.invalidate();
callback.recognized(recognitionResult);
}
@Override
public void onComplete() {
frameWaiting.release();
}