内部类完成后，Java启动Next循环迭代 [英] Java start Next loop iteration after inner class has finished

问题描述

所以我陷入了一个非常基本的Java问题上.

So I got stuck on a pretty basic Java thing.

也就是说，我有一个 iteration ，需要在 inner class 完成后转到下一个循环.但是由于内部类需要花费大量时间，并且可以在内部类中访问的变量必须为 final 这会抛出 RejectedExecutionException .

Namely I have an iteration that needs to go to a next loop after the inner class has finished. But since the inner class takes a lot of time and the variables that can be accessed in inner class must be final it throws me RejectedExecutionException.

java.util.concurrent.RejectedExecutionException: Task android.os.AsyncTask$3@290074 rejected from java.util.concurrent.ThreadPoolExecutor@d50b99d[Running, pool size = 17, active threads = 17, queued tasks = 128, completed tasks = 42]

这是引发异常的简化解决方案.

Here is the simplified solution that threw the exception.

for (int i = 0; i < 10;i++) {

        String[] cmd = { "-i",  imageToBeFiltered.toString(), "-filter_complex", filters[loopCounter], imageWithFilter.toString()};

        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {

            @Override
            public void onSuccess(String message) {
                super.onSuccess(message);

                //Continue loop only if it has reached onSuccess or onFailure

            }
            @Override
            public void onFailure(String message) {
                super.onFailure(message);
                //Continue loop only if it has reached onSuccess or onFailure
            }
        });
    }
}

在执行正常的 fori-loop 时，它并不总是等待所有 terminal调用完成并继续进行.

When doing the normal fori-loop it does not always wait for all of the terminal calls to finish and just goes on.

推荐答案

您是否考虑过递归?

void myMethod(int index) {
    String[] cmd = { "-i",  imageToBeFiltered.toString(), "-filter_complex", filters[loopCounter], imageWithFilter.toString()};

    ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {

        @Override
        public void onSuccess(String message) {
            super.onSuccess(message);

            if (index < 10) myMethod(index++);

        }
        @Override
        public void onFailure(String message) {
            super.onFailure(message);

            if (index < 10) myMethod(index++);
        }
    });
}

我猜想 loopCounter 应该是索引，在这种情况下，如果您使用此代码，则需要更改它.

I'm guessing that loopCounter is supposed to be the index, in which case you'll want to change that if you use this code.

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