Android P(API 28)-StrictMode策略违反"SmartSelectionEventTracker $ SelectionEvent;-> selectionAction"的操作是什么?意思是? [英] Android P (API 28) - What does the StrictMode policy violation "SmartSelectionEventTracker$SelectionEvent;->selectionAction" mean?

问题描述

我正在使用StrictMode来查找非SDK用法:

I am using the StrictMode in order to find non-SDK usages:

if (BuildConfig.DEBUG && Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
    StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
            .detectNonSdkApiUsage()
            .penaltyLog()
            .build());
}

现在，我违反了政策:

D/StrictMode: StrictMode policy violation: android.os.strictmode.NonSdkApiUsedViolation: Landroid/view/textclassifier/logging/    SmartSelectionEventTracker$SelectionEvent;->selectionAction(IIILandroid/view/textclassifier/TextClassification;)Landroid/view/textclassifier/logging/    SmartSelectionEventTracker$SelectionEvent;
        at android.os.StrictMode.lambda$static$1(StrictMode.java:428)
        at android.os.-$$Lambda$StrictMode$lu9ekkHJ2HMz0jd3F8K8MnhenxQ.accept(Unknown Source:2)
        at java.lang.Class.getDeclaredMethodInternal(Native Method)
        at java.lang.Class.getPublicMethodRecursive(Class.java:2075)
        at java.lang.Class.getMethod(Class.java:2063)
        at java.lang.Class.getMethod(Class.java:1690)
        at bzi.a(SourceFile:11)
        at bzq.a(SourceFile:12)
        at org.chromium.content.browser.selection.SmartSelectionClient.<init>(SourceFile:5)
        at bzZ.a(Unknown Source:7)
        at org.chromium.android_webview.AwContents.e(SourceFile:193)
        at org.chromium.android_webview.AwContents.d(SourceFile:153)
        at org.chromium.android_webview.AwContents.<init>(SourceFile:81)
        at uY.run(SourceFile:15)
        at ahv.a(SourceFile:13)
        at ahw.run(SourceFile:2)
        at org.chromium.base.ThreadUtils.b(SourceFile:31)
        at ahv.a(SourceFile:7)
        at com.android.webview.chromium.WebViewChromiumFactoryProvider.b(SourceFile:6)
        at com.android.webview.chromium.WebViewChromium.init(SourceFile:111)
        at android.webkit.WebView.<init>(WebView.java:678)
        at android.webkit.WebView.<init>(WebView.java:604)
        at android.webkit.WebView.<init>(WebView.java:587)
        at android.webkit.WebView.<init>(WebView.java:574)
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
        at android.view.LayoutInflater.createView(LayoutInflater.java:647)
        at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:720)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:788)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at com.mine.ui.events.EventScreen.onCreateView(EventScreen.java:70)
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:2354)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1419)
        at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
        at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:799)
        at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
        at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
        at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2229)
        at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:781)
        (... shortened ...)

重要的一行是:

at com.mine.ui.events.EventScreen.onCreateView(EventScreen.java:70)

检查上述行:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// This is the important line:
ViewGroup content = (ViewGroup) inflater.inflate(R.layout.mine_event, container, false);
WebView webView = (WebView) content.findViewById(R.id.container);
webView.loadUrl(event.getWebViewUrl());
webView.getSettings().setJavaScriptEnabled(true);
(...)

所以我在通货膨胀发生时得到违规，我不太明白.

So I get the violation while the inflation happens, which I dont quite understand.

您会在提到的那行之后不久看到一个WebView起作用.我已经查看了SmartSelectionEventTracker

As you can see shortly after the mentioned line a WebView comes into play. I have looked at the source-code for the SmartSelectionEventTracker here and it seems like a generic class for Widgets like TextViews, WebViews, .... WebViews seem to be related to MockViews which are related to TextViews.

但是，除了这一发现之外，我还不知道违规行为的发生原因/原因以及我可以采取什么措施.

But apart from that finding I do not understand how / why the violation is happening and what I can do against it.

有人可以向我解释吗?

推荐答案

在Android P中，限制已添加到私有API(即，不属于公共SDK且可以通过反射访问的API).请参见对非SDK接口的限制:

In Android P, restrictions have been added to private APIs (that is, APIs that are not part of the public SDK and are accessed via reflection). See Restrictions on non-SDK interfaces:

Android 9(API级别28)引入了对非SDK接口使用的新限制，无论是直接，通过反射还是通过JNI.每当应用程序引用非SDK接口或尝试使用反射或JNI获取其句柄时，就会应用这些限制.有关此决定的更多信息，请参见通过减少非SDK接口的使用来提高稳定性.

Android 9 (API level 28) introduces new restrictions on the use of non-SDK interfaces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app references a non-SDK interface or attempts to obtain its handle using reflection or JNI. For more information about this decision, see Improving Stability by Reducing Usage of non-SDK Interfaces.

这就是您所看到的-这是一个警告，警告某人正在访问那些将来可能会删除的私有API之一.但是，如您所提到的，堆栈跟踪显示这是来自WebView的.特别是在

So that's what you're seeing -- it's a warning that something is accessing one of those private APIs that may be removed in the future. However, the stack trace shows, as you mentioned, that this is coming from the WebView. In particular, during the initialization of SmartSelectionClient. That initializes a native library that implicitly is accessing SmartSelectionEventTracker, which is marked with @hide in its Javadoc statement, which indicates it is not part of the public SDK.

简而言之，对于此特定警告，您可能无能为力，所以我不必担心.它发生在设备的Chromium WebView实现中，因此不在应用程序的控制范围之内.由于Android和Chromium都是由Google发布的，因此，如果将来的发行版中存在合法问题，则会在WebView实现中发布更新，然后才成为问题.

In short, there's likely nothing you can do about this particular warning, so I wouldn't worry about it. It's happening in the device's Chromium WebView implementation, so it's outside of your application's control. As both Android and Chromium are published by Google, if there is a legitimate issue in a future release, an update will be published to the WebView implementation before it becomes a problem.

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