我们在每个 Activity 中都有一个带有嵌入式 Webview 的夹具。在某个页面上，我们显示一个进度条，然后显示Webview，再次显示进度条，最后加载内容。
最后，我们使用 query 方法触发 Javascript 查询。我们的夹具最终看起来像这样 -
performAction('wait_for_no_progress_bars')
performAction("wait_for_view_by_id", 'webView')
performAction('wait_for_no_progress_bars')
performAction("wait_for_view_by_id", 'webView')
result =query("webView, css:"+locator)
它在查询步骤中失败，说“没有找到 Webviews”。这之前的步骤通过（它获取 WebView），但查询步骤失败。关于可能出现什么问题的任何想法？
在对robotium源码的研究中，我们发现query方法内部使用了' getCurrentViews()'，不仅看可见性，还对高度做了一些处理。我们这里的观点高度相当长。这会导致任何问题吗？
控制台输出如下 -
2013-01-10 14:33:42 - Action: wait_for_no_progress_bars - Params:
2013-01-10 14:33:42 - Result:'{"bonusInformation":[],"message":"","success":true}'
2013-01-10 14:33:42 - Action: wait_for_view_by_id - Params: webView
2013-01-10 14:33:42 - Result:'{"bonusInformation":[],"message":"","success":true}'
2013-01-10 14:33:42 - Action: wait_for_no_progress_bars - Params:
2013-01-10 14:33:42 - Result:'{"bonusInformation":[],"message":"","success":true}'
2013-01-10 14:33:42 - Action: wait_for_view_by_id - Params: webView
2013-01-10 14:33:42 - Result:'{"bonusInformation":[],"message":"","success":true}'
2013-01-10 14:33:47 - Action: query - Params: css, #payment_info
2013-01-10 14:33:48 - Result:'{"bonusInformation":["Exception stack trace:\njava.lang.RuntimeException: No webviews found\n\tat sh.calaba.instrumentationbackend.actions.webview.QueryHelper.executeJavascriptInWebview(QueryHelper.java:35)\n\tat sh.calaba.instrumentationbackend.actions.webview.Query.execute(Query.java:13)\n\tat sh.calaba.instrumentationbackend.Command.execute(Command.java:49)\n\tat sh.calaba.instrumentationbackend.actions.HttpServer.runCommand(HttpServer.java:158)\n\tat sh.calaba.instrumentationbackend.actions.HttpServer.serve(HttpServer.java:114)\n\tat sh.calaba.instrumentationbackend.actions.NanoHTTPD$HTTPSession.run(NanoHTTPD.java:412)\n\tat java.lang.Thread.run(Thread.java:856)\n"],"message":"No webviews found","success":false}'
亚行日志如下——
Activity to be started :class com.abcd.mobile.android.booking.PaymentInfoActivity
I/ActivityManager( 79): START {cmp=com.abcd.mobile.android/.booking.PaymentInfoActivity} from pid 2041
W/WindowManager( 79): Failure taking screenshot for (180x300) to layer 21045
W/InputManagerService( 79): Focus gain on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@4169adf0 (uid=10045 pid=2041)
D/RhinoConnector( 2041): Instantiating connection for activity com.abcd.mobile.android.booking.PaymentInfoActivity
D/dalvikvm( 2041): GC_CONCURRENT freed 1892K, 13% free 27424K/31175K, paused 7ms+24ms
I/Process ( 79): Sending signal. PID: 2041 SIG: 3
I/dalvikvm( 2041): threadid=3: reacting to signal 3abcd
D/RhinoConnector( 2041): Rhino bounded. Executing post connection hook for com.abcd.mobile.android.booking.PaymentInfoActivity
I/dalvikvm( 2041): Wrote stack traces to '/data/anr/traces.txt'
V/PhoneStatusBar( 152): setLightsOn(true)
I/Process ( 79): Sending signal. PID: 2041 SIG: 3
I/dalvikvm( 2041): threadid=3: reacting to signal 3
I/System.out( 2041): URI: /
I/System.out( 2041): header: {content-type=application/json;charset=utf-8, connection=close, user-agent=Ruby, host=127.0.0.1:34777, content-length=55, accept=*/*}
I/System.out( 2041): params: {json={"command":"query","arguments":["css","#payment_info"]}
I/System.out( 2041): }
I/System.out( 2041): files: {}
I/System.out( 2041): command: {"command":"query","arguments":["css","#payment_info"]}
I/InstrumentationBackend( 2041): Got command:'Command:'Line:null,query', arguments:'[css, #payment_info]'
I/dalvikvm( 2041): Wrote stack traces to '/data/anr/traces.txt'
W/System.err( 2041): java.lang.RuntimeException: No webviews found
W/System.err( 2041): at sh.calaba.instrumentationbackend.actions.webview.QueryHelper.executeJavascriptInWebview(QueryHelper.java:35)
W/System.err( 2041): at sh.calaba.instrumentationbackend.actions.webview.Query.execute(Query.java:13)
W/System.err( 2041): at sh.calaba.instrumentationbackend.Command.execute(Command.java:49)
W/System.err( 2041): at sh.calaba.instrumentationbackend.actions.HttpServer.runCommand(HttpServer.java:158)
W/System.err( 2041): at sh.calaba.instrumentationbackend.actions.HttpServer.serve(HttpServer.java:114)
W/System.err( 2041): at sh.calaba.instrumentationbackend.actions.NanoHTTPD$HTTPSession.run(NanoHTTPD.java:412)
W/System.err( 2041): at java.lang.Thread.run(Thread.java:856)