This是一个已知的令人烦恼的2岁Android漏洞.
我的问题是除了修改Android源代码并再次编译之外,有没有人知道这个问题的解决方法?
这是我的代码,为了完成:
提升NPE的My Service子类方法:
/** Shows notification of started service */ private void doStartForeground() { // Prepare notification final NotificationHelper nh = doNotification("Service started"); // Start foreground startForeground(nh.getNotificationId(),nh.getNotification()); }
和JUnit测试方法:
public void test1() throws InterruptedException { assertTrue(context != null); final Intent service = new Intent(); service.setComponent(new ComponentName(CoreService.PACKAGE_NAME,CoreService.SERVICE_FULL_NAME)); IBinder binder = bindService(service); assertTrue(binder != null); }
堆栈跟踪:
java.lang.NullPointerException at android.app.Service.startForeground(Service.java:631) at com.blablabla.android.core.CoreService.doStartForeground(CoreService.java:82) at com.blablabla.android.core.CoreService.onCreate(CoreService.java:149) at android.test.ServiceTestCase.bindService(ServiceTestCase.java:234) at com.blablabla.android.core.test.MainTest.test1(MainTest.java:37) at java.lang.reflect.Method.invokeNative(Native Method) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:537) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1551)
服务启动正常,并且在不通过Android的JUnit运行时工作正常.
解决方法
我终于在我的服务中添加了一个新的静态字段:
/** JUNIT - this is for testing purposes only */ public static boolean isJUnit = false;
并在onCreate()方法中检查它:
// Start the service as foreground (Android should not kill this // service) if (!isJUnit) { doStartForeground(); }
然后我从JUnit的setUp()设置这个标志:
@Override protected void setUp() throws Exception { super.setUp(); // More setup MyServiceClass.isJUnit = true; }
不是最优雅的解决方案,但让我摆脱封锁.