接上次的问题：大家都是怎么实现 android 异步接口测试的呢
根据大家的提示，和网上的各种资料，将代码修改为

public class Test extends InstrumentationTestCase {
    private Activity mActivity;
    private Context mApplicationContext;
    private int error_code = -1;
    private String message;

    private static final String TAG = "MyTest";
    @Override
    protected void setUp() throws Exception {

        super.setUp();
        Intent intent = new Intent();
        intent.setClassName("xxx.xxx.com.test", MainActivity.class.getName());
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        mActivity = (MainActivity) getInstrumentation().startActivitySync(intent);
        mApplicationContext = mActivity.getApplicationContext();
    }
    @Override
    protected void tearDown() throws Exception {
        mActivity.finish();
        try {
            super.tearDown();
        } catch (Exception e) {
            e.printStackTrace();
        }
        super.tearDown();
    }



    public void testLogin() throws Throwable{
        final CountDownLatch signal = new CountDownLatch(1);
        //在UI线程中执行异步操作
        runTestOnUiThread(new Runnable() {
            @Override
            public void run() {
                //我要测试的方法
                A.getInstance().login("ffff", 11, "", "test", new MyManager.CallBack() {
                    @Override
                    public void finish(int code, String msg) {
                        error_code = code;
                        message = msg;
                        signal.countDown();
                        Log.d(TAG, message);
                        Log.d(TAG, error_code + "");

                    }
                });
            }
        });
        //signal.await(10, TimeUnit.SECONDS);
        signal.await();
        assertEquals(1, error_code);
    }

}

执行测试，测试方法一直转圈,且 error_code 一直是-1，中间的 Log.d 也没有被执行到