gistfile1.java

	static class TestAsyncTask extends AsyncTask<Void, Void, Void> {

		private static final String TAG = "TestAsyncTask";
		private static final int TASK_COUNT = 5;

		@Override
		protected Void doInBackground(Void... params) {
			Log.i(TAG, "doInBackground " + mId);

			try {
				Thread.sleep(5 * 1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}

			mLatch.countDown();
			return null;
		}

		@Override
		protected void onPreExecute() {
			Log.i(TAG, "onPreExecute " + mId);
		}

		private TestAsyncTask(int id, CountDownLatch latch) {
			mId = id;
			mLatch = latch;
		}

		private int mId;
		private CountDownLatch mLatch;

		public static void testDefaultExecutor() {
			Log.i(TAG, "testDefaultExecutor");

			CountDownLatch latch = new CountDownLatch(TASK_COUNT);
			for (int i = 0; i < TASK_COUNT; ++i) {
				TestAsyncTask task = new TestAsyncTask(i, latch);
				task.execute();
			}
			try {
				latch.await();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}

		public static void testThreadPoolExecutor() {
			Log.i(TAG, "testThreadPoolExecutor");

			CountDownLatch latch = new CountDownLatch(TASK_COUNT);
			for (int i = 0; i < TASK_COUNT; ++i) {
				TestAsyncTask task = new TestAsyncTask(i, latch);
				task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
			}
			try {
				latch.await();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}