在 Android 中我可以设置 Handler(looper) 优先级吗？

Question

我有这个设置，其中 Progressbar 显示不确定的进度。然后我将这个在主循环线程上浮出水面的后台线程放入 RecyclerView 适配器中。

线程同时向 Progressbar 报告进度，它有自己的守护线程侦听，这反过来在循环器上显示 show/set Progressbar 状态。

我的problem/question是Progressbar守护线程调用looper更新Progressbar时，进度条可视化不流畅。

我想知道在使用 Handler 发布到 Main Looper 时是否可以像创建普通线程时那样优先排序，以便 Progressbar 顺利

Answer 1

我猜这是一个答案，正如@pskink 所评论的那样，我正在尝试“Thread.setPriority()”，我认为它正在工作。在这里我设置了 MIN_PRIORITY 并且它几乎减慢了一切。优先级为 3 更好。我认为这应该根据平台在运行时设置 CPU

Class: BackgroundExecutorService.java

import android.os.Handler;
import android.os.Looper;
import android.support.annotation.NonNull;


import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

    public enum BackgroundExecutorService {
        INSTANCE;

        /*
         * Max single thread ExecutorService that will spin down thread after use
         */
        private final Executor executor;

        {
            ThreadPoolExecutor executor = new ThreadPoolExecutor(1, 1,
                    5L, TimeUnit.SECONDS,
                    new LinkedBlockingQueue<Runnable>(),
                    new ThreadFactory() {
                        @Override
                        public Thread newThread(@NonNull final Runnable r) {
                            Thread t = new Thread(r, "GooglePlaceExc" + "Thread");
                            t.setPriority(Thread.MIN_PRIORITY);
                            return t;
                        }
                    });
            executor.allowCoreThreadTimeOut(true);
            this.executor = executor;
        }

        private final Handler mHandler = new Handler(Looper.getMainLooper());

        public <R> void enqueue(final BackgroundJob<R> job) {
            executor.execute(new Runnable() {
                @Override
                public void run() {
                    try {
                        final R result = job.executeInBackground();
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                job.onSuccess(result);
                            }
                        });
                    } catch (final Exception e) {
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                job.onFailure(e);
                            }
                        });
                    }
                }
            });
        }
    }

在 Android 中我可以设置 Handler(looper) 优先级吗？

In Android can I set the Handler(looper) priority?

multithreading

android

progress-bar

android-looper