android webview 报错,解决Android8.0系统应用打开webView报错

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:Caused by: java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes 异常信息可以看出 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 providerClass = getProviderClass();

Trace.traceBegin(Trace.TRACE_TAG_WEBVIEW, "providerClass.newInstance()");

try {

//3 给 sProviderInstance 赋值

sProviderInstance = providerClass.get