'getting exception "Error while connecting UiAutomation" on starting instrumentation using Runtime.getRuntime().exec

started the shell command from mainActivity.java, Runtime.getRuntime().exec("am instrument -w com.example.android.testing.uiautomator.BasicSample.test/androidx.test.runner.AndroidJUnitRunner");

and trying to get a UiDevice object in AndroidJUnit4 class as below,

    @RunWith(AndroidJUnit4.class)
@SdkSuppress(minSdkVersion = 18)
public class ChangeTextBehaviorTest {
      @Before
    public void startMainActivityFromHomeScreen() throws UiObjectNotFoundException, 
          InterruptedException {
        // Initialize UiDevice instance
        Instrumentation instr = InstrumentationRegistry.getInstrumentation();
        mDevice = UiDevice.getInstance(instr);
     }

On running the instrumantation from adb, it works fine but through shell command from mainActivity it fails with below reason,

Line 14779: 02-20 12:27:45.655  7344  7411 I TestRunner: started: testChangeText_newActivity(com.example.android.testing.uiautomator.BasicSample.ChangeTextBehaviorTest)
Line 14784: 02-20 12:27:45.667  7344  7411 E TestRunner: failed: testChangeText_newActivity(com.example.android.testing.uiautomator.BasicSample.ChangeTextBehaviorTest)
Line 14785: 02-20 12:27:45.667  7344  7411 E TestRunner: ----- begin exception -----
Line 14786: 02-20 12:27:45.669  7344  7411 E TestRunner: java.lang.RuntimeException: Error while connecting UiAutomation@f398452[id=-1, flags=0]
Line 14787: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.app.UiAutomation.connect(UiAutomation.java:252)
Line 14788: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.app.Instrumentation.getUiAutomation(Instrumentation.java:2182)
Line 14789: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.uiautomator.UiDevice.getUiAutomation(UiDevice.java:1129)
Line 14790: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.uiautomator.QueryController.<init>(QueryController.java:95)
Line 14791: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.uiautomator.UiDevice.<init>(UiDevice.java:109)
Line 14792: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.uiautomator.UiDevice.getInstance(UiDevice.java:261)
Line 14793: 02-20 12:27:45.669  7344  7411 E TestRunner:    at com.example.android.testing.uiautomator.BasicSample.ChangeTextBehaviorTest.startMainActivityFromHomeScreen(ChangeTextBehaviorTest.java:73)
Line 14794: 02-20 12:27:45.669  7344  7411 E TestRunner:    at java.lang.reflect.Method.invoke(Native Method)
Line 14795: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
Line 14796: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
Line 14797: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
Line 14798: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.internal.runner.junit4.statement.RunBefores.evaluate(RunBefores.java:76)
Line 14799: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
Line 14800: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
Line 14801: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
Line 14802: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
Line 14803: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
Line 14804: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
Line 14805: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
Line 14806: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
Line 14807: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
Line 14808: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
Line 14809: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
Line 14810: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
Line 14811: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.ext.junit.runners.AndroidJUnit4.run(AndroidJUnit4.java:162)
Line 14812: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.Suite.runChild(Suite.java:128)
Line 14813: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.Suite.runChild(Suite.java:27)
Line 14814: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
Line 14815: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
Line 14816: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
Line 14817: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
Line 14818: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
Line 14819: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
Line 14820: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
Line 14821: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
Line 14822: 02-20 12:27:45.669  7344  7411 E TestRunner:    at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
Line 14823: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
Line 14824: 02-20 12:27:45.669  7344  7411 E TestRunner:    at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:439)
Line 14825: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2211)
Line 14826: 02-20 12:27:45.669  7344  7411 E TestRunner: Caused by: android.os.DeadObjectException
Line 14827: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.os.BinderProxy.transactNative(Native Method)
Line 14828: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.os.BinderProxy.transact(BinderProxy.java:550)
Line 14829: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.app.IUiAutomationConnection$Stub$Proxy.connect(IUiAutomationConnection.java:422)
Line 14830: 02-20 12:27:45.669  7344  7411 E TestRunner:    at android.app.UiAutomation.connect(UiAutomation.java:249)

Thannk you in Advance, little help if anyone already saw this will help to get through.

android-testingandroid-uiautomator


Sources

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Source: Stack Overflow

Solution Source

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