小编Gau*_*ham的帖子

Android SDK：22 (L) UiAutomator 版本：'com.android.support.test.uiautomator:uiautomator-v18:2.1.1'

在单击按钮时，我正在尝试使用 Android 应用程序访问仪器

Boolean start = false;
start = startInstrumentation(new ComponentName("com.automation.vzw.sanity.test", "android.test.InstrumentationTestRunner"), null, null);
  System.out.println("value of start is " +start);

start 的值显示“true”，表示它已启动

问题是：一旦 Instrumentation 启动并调用 setUp() ，当下面被执行时，就会发生崩溃

public class ApplicationTest extends InstrumentationTestCase {

 public void setUp() {
              UiDevice testDevice = UiDevice.getInstance(getInstrumentation());
             }

 public void testCase1(){

        System.out.println("In testcase1");

}

}

崩溃详情：

/TestRunner(11209): started: testCase1(com.automation.vzw.sanity.ApplicationTest)

I/TestRunner(11209): failed: testCase1(com.automation.vzw.sanity.ApplicationTest)

I/TestRunner(11209): ----- begin exception -----

I/TestRunner(11209): 

I/TestRunner(11209):   java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.UiAutomation.setOnAccessibilityEventListener(android.app.UiAutomation$OnAccessibilityEventListener)' on a null object …