在vivo x9，Android系统版本为7.1.2上，存在使用问题

[zhechengmao]

在该机型上，脚本中使用该代码driver.elementByXPath(”******“).click();，会报空指针异常
2019-03-28 14:18:39 Request:http://localhost:3456/wd/hub/session/9d146aed-bf8d-42a7-a6b3-d4748a6bd1d6/element:{"using":"xpath","value":"//android.widget.FrameLayout[1]/android.widget.LinearLayout[1]/android.widget.FrameLayout[1]/android.widget.LinearLayout[1]/android.widget.FrameLayout[1]/android.support.v4.widget.DrawerLayout[1]/android.widget.RelativeLayout[1]/android.widget.FrameLayout[1]/android.widget.RelativeLayout[1]/android.widget.RelativeLayout[2]/android.widget.LinearLayout[1]/android.widget.FrameLayout[1]/android.widget.TextView[1]"}
2019-03-28 14:18:39 Response:{"status":0,"value":{"ELEMENT":"1"},"sessionId":"9d146aed-bf8d-42a7-a6b3-d4748a6bd1d6"}
2019-03-28 14:18:39 Request:http://localhost:3456/wd/hub/session/9d146aed-bf8d-42a7-a6b3-d4748a6bd1d6/element/1/click:{}
2019-03-28 14:18:40 Response:{"status":7,"value":"An element could not be located on the page using the given search parameters.","sessionId":"9d146aed-bf8d-42a7-a6b3-d4748a6bd1d6"}

java.lang.NullPointerException
at macaca.client.common.Utils.deleteRequest(Utils.java:125)
at macaca.client.common.Utils.request(Utils.java:142)
at macaca.client.commands.Session.delSession(Session.java:50)
at macaca.client.MacacaClient.quit(MacacaClient.java:1209)
at com.javademo.cases.Login.tearDown(Login.java:29)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
使用坐标点击，同样如此

换成华为机器，该问题得以解决。