how to use Instrumentation under the uiautomator project?

Question

I'm working on a uiautomator project recently and then the UiObject.getFromParent turn out a wrong element to me and I look into the source code of uiautomator and found out the answer is because by the UiSelector I used.

I found that the uiautomator is using the Instrumentation to get the UI element stuff just like :

getInstrumentation().getUiAutomation().getRootInActiveWindow();

I just want to get a AccessibilityNodeInfo node just like what uiautomator do but the uiautomator didn't exposed this.

I’m trying this way by a new class extends InstrumentationTestCase,by the getInstrumentation() always return a null to me.

i found an answer on android instrumentation test case - getinstrumentation() returning null that needs injectInstrumentation(InstrumentationRegistry.getInstrumentation()); and told InstrumentationRegistry is from the official Android testing-support-lib:0.1

I have download the Android Support Repository and import the testing-support-lib-0.1-source.jar into my project but I still can't see InstrumentationRegistry.

Anyone have any idea about my cast?

score 1 · Answer 1 · answered Jun 20 '15 at 19:42

I'm using an extension of InstrumentationTestCase and it works just fine like this:

@Override
public void setUp() throws Exception{
    super.setUp();
    Instrumentation instrumentation = InstrumentationRegistry.getInstrumentation();
    AccessibilityNodeInfo root = instrumentation.getUiAutomation().getRootInActiveWindow();
}

I imported

import android.test.InstrumentationTestCase;
import android.support.test.InstrumentationRegistry;
import android.view.accessibility.AccessibilityNodeInfo;

and installed

Android Support Repository (15)
Android Support Library (22.2)

Hope it helps.

Thank you for the answer yes it helped and i'm very appreciate,but my project is using the extension of UiAutomatorTestCase and i have already written a lot of code base on it,so i don't want to change it.and in the end i have solved this question in a little bit unnormal way what i marked as acceptance of answer.and sorry for the late reply. — coder, Jul 13 '15 at 16:16

score 0 · Answer 2 · answered Jun 14 '15 at 13:50

well,this question has beep solved by

unpack testing-support-lib-0.1.aar and get the classes.jar instead of testing-support-lib-0.1-source.jar

.and now the eclipse will not saying can't resolved anymore.By the way,u have to

add this lib to Ant's javac classpath by edit build.xml

or else u will get a lib not found while u trying ant build. but now the NEW question has turns out

INSTRUMENTATION_STATUS: stack=java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/test/InstrumentationRegistry;

maybe it's another question so i am going to find out via google and i will update this if figure it out or i will post a new question.

You shouldn't be using Eclipse but AndroidStudio. I had tons of problems when I tried to use Eclipse and after figuring out Android Studio it worked like a charm :) — Inês, Jun 20 '15 at 19:43

score 0 · Accepted Answer · answered Jul 13 '15 at 16:13

Frist tried:

i have noticed that the point of this question is the uiautomator didn't expose the api i want,and when i look into the source and found the UiDevice.dumpWindowHierarchy that has these code:

AccessibilityNodeInfo root =getAutomatorBridge().getQueryController().getAccessibilityRootNode();
 the getAutomatorBridge was implemented by UiDevice:
   UiAutomatorBridge getAutomatorBridge() {
        if (mUiAutomationBridge == null) {
            throw new RuntimeException("UiDevice not initialized");
        }
        return mUiAutomationBridge;
    }

the point is there is no modifier on it,so what i have done is modified it's modifier to public ,modified the byte code of

/system/framework/uiautomator.jar

and the other one in sdk(sorry i don't,ya it worked!i can use it like this.

AccessibilityNodeInfo root =getUidevice().getAutomatorBridge().getQueryController().getAccessibilityRootNode();

but there is a compatibility issue isn't it?

Second tried:

Let's think about the default modifier of java,we can access it under the same package,so why don't we just implement a class has the same Package name ?then we can call it without any unnomal patch. that's what i have done and it really works well:

package com.android.uiautomator.core;

import android.view.Display;
import android.view.accessibility.AccessibilityNodeInfo;

public class AutomationUltilites
{
    public AutomationUltilites()
    {
    }
    public static AccessibilityNodeInfo  getRootNode()
    {
        return UiDevice.getInstance().getAutomatorBridge().getRootInActiveWindow();
    }
    public static Display getDisplay()
    {
        return UiDevice.getInstance().getAutomatorBridge().getDefaultDisplay();
    }
}

Hope it helps.

how to use Instrumentation under the uiautomator project?

3 Answers3

Frist tried:

Second tried: