Getting lot of ANR using Accessibility service in android

Question

i am getting ANR from reports

Broadcast of Intent { act=android.intent.action.PACKAGE_ADDED dat=package:com.google.android.apps.maps flg=0x4000010 cmp=xx.xx.xx/com.microsoft.aad.adal.ApplicationReceiver (has extras) }

Broadcast of Intent { act=android.intent.action.PACKAGE_ADDED dat=package:com.google.android.apps.translate flg=0x4000010 cmp=xx.xx.xx/com.microsoft.aad.adal.ApplicationReceiver (has extras) }

"main" prio=5 tid=1 TimedWaiting | group="main" sCount=1 dsCount=0 obj=0x7527b598 self=0xe9105400 | sysTid=29196 nice=0 cgrp=default sched=0/0 handle=0xebfd2534 | state=S schedstat=( 0 0 0 ) utm=1236 stm=469 core=2 HZ=100 | stack=0xff733000-0xff735000 stackSize=8MB
| held mutexes= at java.lang.Object.wait! (Native method) - waiting on <0x0fa0a2fe> (a java.lang.Object) at java.lang.Object.wait (Object.java:407) at android.view.accessibility.AccessibilityInteractionClient.waitForResultTimedLocked (AccessibilityInteractionClient.java:685) at android.view.accessibility.AccessibilityInteractionClient.getFindAccessibilityNodeInfosResultAndClear (AccessibilityInteractionClient.java:580) - locked <0x0fa0a2fe> (a java.lang.Object) at android.view.accessibility.AccessibilityInteractionClient.findAccessibilityNodeInfoByAccessibilityId (AccessibilityInteractionClient.java:292) at android.view.accessibility.AccessibilityNodeInfo.getChild (AccessibilityNodeInfo.java:851) at xxx.traverseNode (FooAccessibilityService.java:85) at xxx.traverseNode (FooAccessibilityService.java:86) at xxx.traverseNode (FooAccessibilityService.java:86) at xxx.traverseNode (FooAccessibilityService.java:86) at xxx.collectNodes (FooAccessibilityService.java:66) at xxx.onAccessibilityEvent (FooAccessibilityService.java:365) at android.accessibilityservice.AccessibilityService$2.onAccessibilityEvent (AccessibilityService.java:1449) at android.accessibilityservice.AccessibilityService$IAccessibilityServiceClientWrapper.executeMessage (AccessibilityService.java:1585) at com.android.internal.os.HandlerCaller$MyHandler.handleMessage (HandlerCaller.java:37) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6316) at java.lang.reflect.Method.invoke! (Native method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:872) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:762)

My code is

    ArrayList<AccessibilityNodeInfo> collectNodes(AccessibilityNodeInfo node) {

    ArrayList<AccessibilityNodeInfo> nodeInfoArrayList = new ArrayList<>();
    try {
        int childCount = node.getChildCount();
        for (int index = 0; index < childCount; index++) {
            AccessibilityNodeInfo childNode = node.getChild(index);


            traverseNode(childNode);
            if (childNodes != null && childNodes.size() > 0) {
                nodeInfoArrayList.addAll(childNodes);
                childNodes.clear();
            }
        }
    }
    catch (Exception e){
        e.printStackTrace();
    }
    return nodeInfoArrayList;
}

private void traverseNode(AccessibilityNodeInfo node) {
    try {
        AccessibilityNodeInfo edittextNode = null;
        if (null == node)
            return;

        final int count = node.getChildCount();
        if (count > 0) {
            for (int i = 0; i < count; i++) {
                AccessibilityNodeInfo childNode = node.getChild(i);
                if (childNode == null) {
                    node.recycle();
                    return;
                }
                else {
                    traverseNode(childNode);
                }
            }
        } else {

        }
    }
    catch (Exception error){
        error.printStackTrace();
    }
}

Any idea how to resolve this issue

Answer 1

If an app doesn't respond to the request for the AccessibilityNodeInfo, the request for it from the AccessibilityService will time out and return null. That timeout is set to 5s.

If you make repeated requests from the unresponsive app, you can end up with very long waits.

In the first part of the code shown, the loop will continue trying to traverse nodes even if that fails. That can lead to very long delays.

Answer 2

I got a very similar issue :

"main" prio=5 tid=1 TimedWaiting
  | group="main" sCount=1 dsCount=0 obj=0x74e352e8 self=0xb45f6a00
  | sysTid=1785 nice=0 cgrp=default sched=0/0 handle=0xb6efdde4
  | state=S schedstat=( 20808880338 15171670769 80754 ) utm=1292 stm=788 core=1 HZ=100
  | stack=0xbe022000-0xbe024000 stackSize=8MB
  | held mutexes=

  at java.lang.Object.wait! (Native method)
- waiting on <0x022019b2> (a java.lang.Object)

  at java.lang.Object.wait (Object.java:423)

  at android.view.accessibility.AccessibilityInteractionClient.waitForResultTimedLocked (AccessibilityInteractionClient.java:695)

  at android.view.accessibility.AccessibilityInteractionClient.getFindAccessibilityNodeInfosResultAndClear (AccessibilityInteractionClient.java:590)
- locked <0x022019b2> (a java.lang.Object)

  at android.view.accessibility.AccessibilityInteractionClient.findAccessibilityNodeInfosByViewId (AccessibilityInteractionClient.java:349)

  at android.view.accessibility.AccessibilityNodeInfo.findAccessibilityNodeInfosByViewId (AccessibilityNodeInfo.java:1374)

  at com.myApp.myFct (mySource.java:69)

This error is reported on Android 6, and 7.1, but mostly on android 7.0

UPDATE:

• we don't have a lot of user on android 8 yet, but I also see the problem on android 8.
• I still got no clue about how to fix that.

Answer 3

I found issue, actually this is issue due to onedrive-sdk-android

As per onedrive i use below code

repository {
    jcenter()
}

dependency {
    // Include the sdk as a dependency
    compile ('com.onedrive.sdk:onedrive-sdk-android:1.3+') {
        transitive = false
    }

    // Include the gson dependency
    compile ('com.google.code.gson:gson:2.3.1')

    // Include supported authentication methods for your application
    compile ('com.microsoft.services.msa:msa-auth:0.8.+')
    compile ('com.microsoft.aad:adal:1.1.+')
}

and below line

compile ('com.microsoft.aad:adal:1.1.+')

create error which i found here, after change compile ('com.microsoft.aad:adal:1.1.+') to compile ('com.microsoft.aad:adal:1.13.1') resolved issue.