如何注入ui-thread并等待注入完成后再继续?

时间:2013-03-15 22:43:21

标签: android junit dependency-injection dagger

在Dagger中你必须注入UI线程。运行JUnit时,您没有在UI线程上运行。为了使它工作,我们必须在UI线程上发布一个Runnable并等待它完成注入。

我的代码如下所示:

    public void inject(final Object object) {
        // We always has to inject on the main thread.
        final CountDownLatch latch = new CountDownLatch(1);
        Handler mainHandler = new Handler(FodoApplication.getAppContext().getMainLooper());
        Runnable myRunnable = new Runnable() {
            public void run() {
                objectGraph.inject(object);
            latch.countDown();
            }
        };
        mainHandler.post(myRunnable);
        try {
            latch.await();
        } catch (InterruptedException e) {
            Log.e(TAG, "", e);
        }
    }

问题是当调用latch.await()时myRunnable不会启动。在运行JUnit时让Dagger注入的最佳方法是什么?