Android单元测试-startActivity（）使应用程序/测试崩溃
我正在使用Espresso和Mockito测试Android应用程序，并扩展ActivityInstrumentationTestCase2 UI测试工作得很好，但我有一个按钮，当按下它时，onClick方法上的代码会触发startActivity（Intent），然后使应用程序和测试崩溃 在实际活动中，我有这个onClick方法Android单元测试-startActivity（）使应用程序/测试崩溃,android,unit-testing,testing,android-espresso,Android,Unit Testing,Testing,Android Espresso,我正在使用Espresso和Mockito测试Android应用程序，并扩展ActivityInstrumentationTestCase2 UI测试工作得很好，但我有一个按钮，当按下它时，onClick方法上的代码会触发startActivity（Intent），然后使应用程序和测试崩溃 在实际活动中，我有这个onClick方法 public void onContinueButtonClicked(View v) { Intent intent = new I
public void onContinueButtonClicked(View v)
{
Intent intent = new Intent(CurrentActivity.this, NextActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
onView(withId(R.id.btn_continue)).perform(click());
I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.654 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.704 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.754 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.804 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.854 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.905 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:41.955 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.005 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.055 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.105 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.156 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.206 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.256 21469-21505/com.example I/MonitoringInstrumentation: Unstopped activity count: 1
03-09 14:39:42.314 21469-21505/com.example E/THREAD_STATE: Thread[main,5,main]
android.os.MessageQueue.nativePollOnce(Native Method)
android.os.MessageQueue.next(MessageQueue.java:323)
android.os.Looper.loop(Looper.java:135)
android.app.ActivityThread.main(ActivityThread.java:5417)
java.lang.reflect.Method.invoke(Native Method)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Thread[Thread-904,5,main]
java.lang.Object.wait(Native Method)
java.lang.Thread.parkFor$(Thread.java:1220)
sun.misc.Unsafe.park(Unsafe.java:299)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2013)
java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:92)
Thread[FinalizerDaemon,5,system]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:423)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:101)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:72)
java.lang.Daemons$FinalizerDaemon.run(Daemons.java:185)
java.lang.Thread.run(Thread.java:818)
Thread[Queue,10,main]
java.lang.Object.wait(Native Method)
java.lang.Thread.parkFor$(Thread.java:1220)
sun.misc.Unsafe.park(Unsafe.java:299)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2013)
java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1038)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1098)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
java.lang.Thread.run(Thread.java:818)
Thread[Queue,10,main]
java.lang.Object.wait(Native Method)
java.lang.Thread.parkFor$(Thread.java:1220)
sun.misc.Unsafe.park(Unsafe.java:299)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2013)
java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1038)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1098)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
java.lang.Thread.run(Thread.java:818)
Thread[Queue,10,main]
java.lang.Object.wait(Native Method)
java.lang.Thread.parkFor$(Thread.java:1220)
sun.misc.Unsafe.park(Unsafe.java:299)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObjec
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'rx.Subscription rx.Observable.subscribe(rx.functions.Action1, rx.functions.Action1)' on a null object reference
at com.example.activities.MainActivity.onCreate(MainActivity.java:52)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.support.test.runner.MonitoringInstrumentation.callActivityOnCreate(MonitoringInstrumentation.java:532)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
... 23 more
所以，回答我自己的问题。 如果有人需要这些信息。 无法捕捉上下文；
该活动将启动，为防止崩溃，您需要模拟新活动中的所有方法。您可以像操作\u图像\u捕获意图所演示的那样存根该意图：
@Before
public void stubCameraIntent() {
ActivityResult result = createImageCaptureActivityResultStub();
// Stub the Intent.
intending(hasAction(MediaStore.ACTION_IMAGE_CAPTURE)).respondWith(result);
}
@Before
public void stubNextIntent() {
intended(hasComponent(NextActivity.class.getName()));
}
您可能会感兴趣您是否检查了此行
MainActivity.java:52