[android help] How to press a button twice using Google UiAutomator?

How to press a button twice using Google UiAutomator?

I have the following script for typing '33' into the Calculator, in Android, using UiAutomator. However, only the first '3' is accepted, the second press is entirely ignored.

import com.android.uiautomator.core.*;
import com.android.uiautomator.testrunner.UiAutomatorTestCase;

public class MyFirstUiAutomatorTest extends UiAutomatorTestCase {
    UiObject getByDescription(String description) {
        return new UiObject(new UiSelector().description(description));
    }

    UiObject getByText(String description) {
        return new UiObject(new UiSelector().text(description));
    }

    UiObject scrollableGetByText(String text ) throws UiObjectNotFoundException {
            UiScrollable uiScrollable = new UiScrollable(new UiSelector().scrollable(true));
            uiScrollable.setAsHorizontalList();
            return uiScrollable.getChildByText(new UiSelector().className(
                    android.widget.TextView.class.getName()),
                    text);      
    }

    public void testStuff() throws UiObjectNotFoundException {
        getUiDevice().pressHome();
        getByDescription("Apps").clickAndWaitForNewWindow();
        getByText("Apps").click();
        scrollableGetByText("Calculator").clickAndWaitForNewWindow();

        // pressing '+' and '=' effectively clears the previous input
        getByText("+").click();
        getByText("=").click();
        getByText("3").click();
        // this second '3' is ignored
        getByText("3").click();
    }
}

I've tried adding a sleep for 2 seconds after the first click, by doing:

        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

... but that didn't change anything.

I also tried clicking on a different button, in between the 2 '3's, ie:

        new UiObject(new UiSelector().text("3")).click();
        new UiObject(new UiSelector().className("android.widget.EditText")).click();
        new UiObject(new UiSelector().text("3")).click();

... but that didn't work either.

Ideas?

(Note: using Android 4.1.2, in an AVD; running on Ubuntu linux 12.04)

.

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