在Android app中ui自动化期间获取错误。我已经实现了简单的LoginScreen，其中包含两个编辑文本，一个用于电子邮件，一个用于密码，一个登录按钮。运行测试类时，我总是遇到这种类型的线程错误。任何人都可以告诉我为什么会出现这个错误。我已经为另一个项目实现了相同的代码，那个时候也面临着这个错误。
错误： -
Thread[Compiler,5,system]
dalvik.system.NativeStart.run(Native Method)
Thread[Binder_2,5,main]
dalvik.system.NativeStart.run(Native Method)
Thread[ReferenceQueueDaemon,5,system]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:364)
java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:130)
java.lang.Thread.run(Thread.java:841)
Thread[Binder_1,5,main]
dalvik.system.NativeStart.run(Native Method)
Thread[FinalizerDaemon,5,system]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:401)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73)
java.lang.Daemons$FinalizerDaemon.run(Daemons.java:170)
java.lang.Thread.run(Thread.java:841)
Thread[FinalizerWatchdogDaemon,5,system]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:364)
java.lang.Daemons$FinalizerWatchdogDaemon.waitForObject(Daemons.java:230)
java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:207)
java.lang.Thread.run(Thread.java:841)
Thread[Instr: android.support.test.runner.AndroidJUnitRunner,5,main]
dalvik.system.VMStack.getThreadStackTrace(Native Method)
java.lang.Thread.getStackTrace(Thread.java:579)
java.lang.Thread.getAllStackTraces(Thread.java:521)
android.support.test.runner.MonitoringInstrumentation.getThreadState(MonitoringInstrumentation.java:501)
android.support.test.runner.MonitoringInstrumentation.dumpThreadStateToOutputs(MonitoringInstrumentation.java:496)
android.support.test.runner.MonitoringInstrumentation.waitForActivitiesToComplete(MonitoringInstrumentation.java:307)
android.support.test.runner.MonitoringInstrumentation.finish(MonitoringInstrumentation.java:273)
android.support.test.runner.AndroidJUnitRunner.finish(AndroidJUnitRunner.java:282)
android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:271)
android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)
Thread[GC,5,system]
dalvik.system.NativeStart.run(Native Method)
Thread[JDWP,5,system]
dalvik.system.NativeStart.run(Native Method)
Thread[OkHttp ConnectionPool,5,main]
java.lang.Object.wait(Native Method)
java.lang.Thread.parkFor(Thread.java:1205)
sun.misc.Unsafe.park(Unsafe.java:325)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2056)
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:435)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
java.lang.Thread.run(Thread.java:841)
Thread[hwuiTask1,5,main]
dalvik.system.NativeStart.run(Native Method)
Thread[Signal Catcher,5,system]
dalvik.system.NativeStart.run(Native Method)
Thread[main,5,main]
android.os.BinderProxy.transact(Native Method)
android.app.ActivityManagerProxy.finishActivity(ActivityManagerNative.java:2272)
android.app.Activity.finish(Activity.java:4216)
android.support.test.runner.MonitoringInstrumentation$ActivityFinisher.run(MonitoringInstrumentation.java:655)
android.os.Handler.handleCallback(Handler.java:733)
android.os.Handler.dispatchMessage(Handler.java:95)
android.os.Looper.loop(Looper.java:136)
android.app.ActivityThread.main(ActivityThread.java:5001)
java.lang.reflect.Method.invokeNative(Native Method)
java.lang.reflect.Method.invoke(Method.java:515)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
dalvik.system.NativeStart.main(Native Method)
MainActivity.java
public class MainActivity extends AppCompatActivity {
Button btn_login;
EditText et_username,et_password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_login=(Button)findViewById(R.id.btn_login);
et_username=(EditText) findViewById(R.id.et_username);
et_password=(EditText)findViewById(R.id.et_password);
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String email_enter = et_username.getText().toString();
String pass_enter = et_password.getText().toString();
userLogin(email_enter,pass_enter);
}
});
}
public void userLogin(String emailenter, String passenter) {
Intent i = new Intent(MainActivity.this,SecondActivity.class);
startActivity(i);
}
MainActivityTest.java
public class MainActivityTest{
UiDevice device;
MainActivity loginScre;
public void setUp() throws Exception {
loginScre = new MainActivity();
}
@Test
public void getIntValue() throws Exception {
device = UiDevice.getInstance(getInstrumentation());
device.pressHome();
device.wait(Until.hasObject(By.desc("Apps")), 3000);
UiObject2 appsButton = device.findObject(By.desc("Apps"));
appsButton.click();
device.wait(Until.hasObject(By.desc("LoginDemo")), 3000);
UiObject2 calculatorApp = device.findObject(By.text("LoginDemo"));
calculatorApp.click();
UiObject editText = new UiObject(new UiSelector().resourceId("example.com.logindemo:id/et_username"));
editText.setText("abc@gmail.com");
String emainEnter = editText.getText().toString();
UiObject psswrd = new UiObject(new UiSelector().resourceId("example.com.logindemo:id/et_password"));
psswrd.click();
psswrd.setText("abc23$");
String psswrdEnter = "abc23$";
device.wait(Until.hasObject(By.text("Login")), 1000);
UiObject2 buttonlogin = device.findObject(By.text("Login"));
buttonlogin.click();
loginScre.userLogin(emainEnter, psswrdEnter);
}