Question

我想防止Android线程同时在不同线程中运行同一任务。我创建了一个简单的Android应用，该应用使用{ "type": "project", "license": "proprietary", "require": { "php": "^7.1.3", "ext-ctype": "*", "ext-iconv": "*", "api-platform/api-pack": "^1.2", "doctrine/doctrine-migrations-bundle": "^2.1", "easycorp/easyadmin-bundle": "^2.3", "lexik/jwt-authentication-bundle": "^2.6", "nesbot/carbon": "^2.32", "symfony/console": "4.4.*", "symfony/dotenv": "4.4.*", "symfony/flex": "^1.3.1", "symfony/framework-bundle": "4.4.*", "symfony/security-bundle": "4.4.*", "symfony/yaml": "4.4.*" }, "require-dev": { "doctrine/doctrine-fixtures-bundle": "^3.3", "fzaninotto/faker": "^1.9", "symfony/maker-bundle": "^1.15", "symfony/profiler-pack": "^1.0" }, "config": { "preferred-install": { "*": "dist" }, "sort-packages": true }, "autoload": { "psr-4": { "App\\": "src/" } }, "autoload-dev": { "psr-4": { "App\\Tests\\": "tests/" } }, "replace": { "paragonie/random_compat": "2.*", "symfony/polyfill-ctype": "*", "symfony/polyfill-iconv": "*", "symfony/polyfill-php71": "*", "symfony/polyfill-php70": "*", "symfony/polyfill-php56": "*" }, "scripts": { "auto-scripts": { "cache:clear": "symfony-cmd", "assets:install %PUBLIC_DIR%": "symfony-cmd" }, "post-install-cmd": [ "@auto-scripts" ], "post-update-cmd": [ "@auto-scripts" ] }, "conflict": { "symfony/symfony": "*" }, "extra": { "symfony": { "allow-contrib": false, "require": "4.4.*" } } }类读取通知，并回复来自特定程序包的接收到的通知。我使用NotificationsListenerService为任务（通知）创建多个线程。一切正常，但是同一条消息或通知被放入多个线程中并同时执行，因此我的应用向用户发送了重复的答复，我知道这是由于竞争状况造成的，但是我找不到解决方案对于这个问题。我已经包含了一些代码片段，请让我知道问题出在哪里。

NotificationsListenerService.java

ThreadPoolExecutor

ThreadManager.java

public void onNotificationPosted(final StatusBarNotification sbn) {
    if (sbn != null && !sbn.isOngoing() && sbn.getPackageName().equals("com.whatsapp.w4b")) {
        notification = sbn.getNotification();
        if (notification != null) {
            bundle = notification.extras;
            remoteInputs = getRemoteInputs(notification);
            if (remoteInputs != null && remoteInputs.size() > 0) {
                Task task = new Task(getApplicationContext(), notification, bundle, remoteInputs, sbn);
                ThreadManager.getManagerInstance().runTask(task);

            }
        }


    }
}

Task.java

public class ThreadManager {


    private static final int NUMBER_OF_CORES = Runtime.getRuntime().availableProcessors();
    private static final int CORE_POOL_SIZE = NUMBER_OF_CORES * 2; 
    private static final int MAX_POOL_SIZE = NUMBER_OF_CORES * 2; 
    private static final int KEEP_ALIVE_TIME = 60;

    private static ThreadManager managerInstance = null;

    final BlockingQueue<Runnable> WorkQueue;
    private final ThreadPoolExecutor threadPoolExecutor;
    RejectedMessagesHandler rejectedHandles;

    static {
        managerInstance = new ThreadManager();
    }

    private ThreadManager() {
        WorkQueue = new LinkedBlockingQueue<Runnable>();
        rejectedHandles = new RejectedMessagesHandler();
        threadPoolExecutor = new ThreadPoolExecutor(CORE_POOL_SIZE, MAX_POOL_SIZE, KEEP_ALIVE_TIME,
                TimeUnit.MILLISECONDS, WorkQueue);
    }

    public void runTask(Runnable runnable) {
        threadPoolExecutor.execute(runnable);
    }

    public static ThreadManager getManagerInstance() {
        return managerInstance;
    }

}

防止线程运行同一任务

0 个答案: