是否有任何已知的问题显示不确定的ProgressBar与AndroidJUnitRunner?我在测试中遇到这个错误:
05-26 15:22:48.504 1003-1016/?我/TestRunner:java.lang.RuntimeException: Could not launch intent= android.intent.action.MAIN flg = 0 x14000000行动cmp=com.cookbrite.dev/com.cookbrite.ui.HomeListActivity} within 45秒。也许主线程在合理的时间内没有空闲时间?可能会有一个动画或其他东西重新粉刷屏幕。或者活动正在进行网络调用创建?查看threaddump日志。最后一次供您参考在您的活动启动请求完成之前，事件队列处于空闲状态1432668122421，现在队列最后一次空闲是:1432668122421. 如果这些数字相同，您的活动可能占用了事件队列。
堆栈跟踪为:
05-26 15:22:48.504 1003-1016/? I/TestRunner﹕ java.lang.RuntimeException: Could not launch intent Intent { act=android.intent.action.MAIN flg=0x14000000 cmp=com.cookbrite.dev/com.cookbrite.ui.HomeListActivity } within 45 seconds. Perhaps the main thread has not gone idle within a reasonable amount of time? There could be an animation or something constantly repainting the screen. Or the activity is doing network calls on creation? See the threaddump logs. For your reference the last time the event queue was idle before your activity launch request was 1432668122421 and now the last time the queue went idle was: 1432668122421. If these numbers are the same your activity might be hogging the event queue.
at android.support.test.runner.MonitoringInstrumentation.startActivitySync(MonitoringInstrumentation.java:274)
at android.test.InstrumentationTestCase.launchActivityWithIntent(InstrumentationTestCase.java:119)
at android.test.InstrumentationTestCase.launchActivity(InstrumentationTestCase.java:97)
at android.test.ActivityInstrumentationTestCase2.getActivity(ActivityInstrumentationTestCase2.java:104)
at com.cookbrite.step2_functional.ui.homelist.HomeListFragmentLoadingTest.testLoadingSpinner(HomeListFragmentLoadingTest.java:40)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192)
at com.cookbrite.util.BaseBlackBoxTest.doRunTest(BaseBlackBoxTest.java:300)
at com.cookbrite.util.BaseBlackBoxTest.access$000(BaseBlackBoxTest.java:44)
at com.cookbrite.util.BaseBlackBoxTest$1.call(BaseBlackBoxTest.java:271)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:841)
由上述超时触发的线程转储显示似乎涉及到ProgressBar:
05-26 15:22:48.135 1003-1018/? E/THREAD_STATE﹕ Thread[main,5,main]
android.graphics.Canvas.native_drawBitmap(Native Method)
android.graphics.Canvas.drawBitmap(Canvas.java:1160)
android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:440)
android.graphics.drawable.RotateDrawable.draw(RotateDrawable.java:88)
android.graphics.drawable.LayerDrawable.draw(LayerDrawable.java:345)
android.widget.ProgressBar.onDraw(ProgressBar.java:1052)
android.view.View.draw(View.java:13944)
android.view.View.draw(View.java:13825)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13823)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13947)
android.view.View.draw(View.java:13825)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13823)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13947)
android.widget.FrameLayout.draw(FrameLayout.java:467)
android.view.View.draw(View.java:13825)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13823)
android.view.ViewGroup.drawChild(ViewGroup.java:3086)
android.view.ViewGroup.dispatchDraw(ViewGroup.java:2923)
android.view.View.draw(View.java:13947)
android.widget.FrameLayout.draw(FrameLayout.java:467)
com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2224)
android.view.ViewRootImpl.drawSoftware(ViewRootImpl.java:2482)
android.view.ViewRootImpl.draw(ViewRootImpl.java:2395)
android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2239)
android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1872)
android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
android.view.Choreographer.doCallbacks(Choreographer.java:562)
android.view.Choreographer.doFrame(Choreographer.java:532)
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
android.os.Handler.handleCallback(Handler.java:730)
android.os.Handler.dispatchMessage(Handler.java:92)
android.os.Looper.loop(Looper.java:137)
android.app.ActivityThread.main(ActivityThread.java:5103)
java.lang.reflect.Method.invokeNative(Native Method)
java.lang.reflect.Method.invoke(Method.java:525)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
dalvik.system.NativeStart.main(Native Method)
Thread[Binder_2,5,main]
dalvik.system.NativeStart.run(Native Method)
Thread[JDWP,5,system]
dalvik.system.NativeStart.run(Native Method)
Thread[pool-1-thread-1,5,main]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:364)
android.app.Instrumentation.startActivitySync(Instrumentation.java:403)
android.support.test.runner.MonitoringInstrumentation.access$101(MonitoringInstrumentation.java:69)
android.support.test.runner.MonitoringInstrumentation$3.call(MonitoringInstrumentation.java:265)
android.support.test.runner.MonitoringInstrumentation$3.call(MonitoringInstrumentation.java:262)
java.util.concurrent.FutureTask.run(FutureTask.java:234)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
java.lang.Thread.run(Thread.java:841)
Thread[pool-5-thread-1,5,main]
dalvik.system.VMStack.getThreadStackTrace(Native Method)
java.lang.Thread.getStackTrace
我不认为你真的可以测试进度条看他们是否完成。
我们使用进度条只是为了显示我们的进度(例如30天周期中的第7天，所以我们的进度条从未完成)。为了避免这个问题，我们不得不为我们的应用使用不同的API级别。我们似乎只在API级别为21的模拟器上遇到这个问题。一旦我们将模拟器切换到API级别19，我们的测试就成功了。
注意:我们在测试中用普通视图更改progressBar方面也取得了一些成功，但我们认为这比我们喜欢的更粗糙。