RK3288 android7.1 系统压力测试 webViwe 报错问题

项目场景：

RK3288 Android7.1 系统跑压力测试，部分系统apk webViwe 报错

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问题描述

webViwe 报错 For security reasons, WebView is not allowed in privileged processes。
例如：

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原因分析：

由于webView存在安全漏洞，谷歌从5.1开始全面禁止系统应用使用webView，使用会导致应用崩溃错误提示：For security reasons, WebView is not allowed in privileged processes异常信息。

当我们在申请app为系统应用，也就是我们在AndroidManifest文件中添加了：

android:sharedUserId=“android.uid.system”

可以看出是在 WebViewFactory.java 的getProvider 方法抛出的。源码路径为：
frameworks/base/core/java/android/webkit/WebViewFactory.java

static WebViewFactoryProvider getProvider() {
        synchronized (sProviderLock) {
            // For now the main purpose of this function (and the factory abstraction) is to keep
            // us honest and minimize usage of WebView internals when binding the proxy.
            if (sProviderInstance != null) return sProviderInstance; //如果sProviderInstance不为空直接返回
              
          //1，判断，如果是系统id ，则抛出异常。
            final int uid = android.os.Process.myUid();
            if (uid == android.os.Process.ROOT_UID || uid == android.os.Process.SYSTEM_UID) {
                throw new UnsupportedOperationException(
                        "For security reasons, WebView is not allowed in privileged processes");
            }
  
            StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
            Trace.traceBegin(Trace.TRACE_TAG_WEBVIEW, "WebViewFactory.getProvider()");
            try {
                //2
                Class<WebViewFactoryProvider> providerClass = getProviderClass();
  
                Trace.traceBegin(Trace.TRACE_TAG_WEBVIEW, "providerClass.newInstance()");
                try {
                    //3 给 sProviderInstance 赋值
                    sProviderInstance = providerClass.getConstructor(WebViewDelegate.class)
                            .newInstance(new WebViewDelegate());
                    if (DEBUG) Log.v(LOGTAG, "Loaded provider: " + sProviderInstance);
                    return sProviderInstance;
                } catch (Exception e) {
                    Log.e(LOGTAG, "error instantiating provider", e);
                    throw new AndroidRuntimeException(e);
                } finally {
                    Trace.traceEnd(Trace.TRACE_TAG_WEBVIEW);
                }
            } finally {
                Trace.traceEnd(Trace.TRACE_TAG_WEBVIEW);
                StrictMode.setThreadPolicy(oldPolicy);
            }
        }
    }

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解决方案：

系统应用AndroidManifest文件中不要随意添加 android:sharedUserId=“android.uid.system”，直接删除即可。