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问题描述
在系统进程中使用 WebView 时，会抛出
AndroidRuntime: Caused by: java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes
特权进程包括sharedUserId为ROOT_UID和SYSTEM_UID的进程
错误日志
Process: com.android.androidx, PID: 5044
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.androidx/com.android.activityx.ChargeActivity}: android.view.InflateException: Binary XML file line #7 in com.android.androidx:layout/layout_charge: Binary XML file line #7 in com.android.androidx:layout/layout_charge: Error inflating class android.webkit.WebView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3437)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2041)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7386)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)
Caused by: android.view.InflateException: Binary XML file line #7 in com.android.androidx:layout/layout_charge: Binary XML file line #7 in com.android.androidx:layout/layout_charge: Error inflating class android.webkit.WebView
Caused by: android.view.InflateException: Binary XML file line #7 in com.android.androidx:layout/layout_charge: Error inflating class android.webkit.WebView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:854)
at android.view.LayoutInflater.createView(LayoutInflater.java:776)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:930)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:950)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1006)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1140)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1101)
at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:438)
at android.app.Activity.setContentView(Activity.java:3324)
at com.android.activityx.ChargeActivity.onCreate(ChargeActivity.java:40)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3273)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3437)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2041)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7386)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)
2020-10-05 14:50:47.621 5044-5044/? E/AndroidRuntime: Caused by: java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes
at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:236)
at android.webkit.WebView.getFactory(WebView.java:2551)
at android.webkit.WebView.ensureProviderCreated(WebView.java:2545)
at android.webkit.WebView.setOverScrollMode(WebView.java:2613)
at android.view.View.<init>(View.java:5062)
at android.view.View.<init>(View.java:5203)
at android.view.ViewGroup.<init>(ViewGroup.java:676)
at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:56)
at android.webkit.WebView.<init>(WebView.java:410)
at android.webkit.WebView.<init>(WebView.java:353)
at android.webkit.WebView.<init>(WebView.java:336)
at android.webkit.WebView.<init>(WebView.java:323)
... 32 more
解决办法
通过 hook 加载过程避免
在项目的 Application OnCreate() 或者要加载的 Activity setContentView() 前调用 hookWebView()
再次运行问题解决
public static void hookWebView(){
int sdkInt = Build.VERSION.SDK_INT;
try {
Class<?> factoryClass = Class.forName("android.webkit.WebViewFactory");
Field field = factoryClass.getDeclaredField("sProviderInstance");
field.setAccessible(true);
Object sProviderInstance = field.get(null);
if (sProviderInstance != null) {
Log.i("hook","sProviderInstance isn't null");
return;
Method getProviderClassMethod;
if (sdkInt > 22) {
getProviderClassMethod = factoryClass.getDeclaredMethod("getProviderClass");
} else if (sdkInt == 22) {
getProviderClassMethod = factoryClass.getDeclaredMethod("getFactoryClass");
} else {
Log.i("hook","Don't need to Hook WebView");
return;
getProviderClassMethod.setAccessible(true);
Class<?> factoryProviderClass = (Class<?>) getProviderClassMethod.invoke(factoryClass);
Class<?> delegateClass = Class.forName("android.webkit.WebViewDelegate");
Constructor<?> delegateConstructor = delegateClass.getDeclaredConstructor();
delegateConstructor.setAccessible(true);
if(sdkInt < 26){//低于Android O版本
Constructor<?> providerConstructor = factoryProviderClass.getConstructor(delegateClass);
if (providerConstructor != null) {
providerConstructor.setAccessible(true);
sProviderInstance = providerConstructor.newInstance(delegateConstructor.newInstance());
} else {
Field chromiumMethodName = factoryClass.getDeclaredField("CHROMIUM_WEBVIEW_FACTORY_METHOD");
chromiumMethodName.setAccessible(true);
String chromiumMethodNameStr = (String)chromiumMethodName.get(null);
if (chromiumMethodNameStr == null) {
chromiumMethodNameStr = "create";
Method staticFactory = factoryProviderClass.getMethod(chromiumMethodNameStr, delegateClass);
if (staticFactory!=null){
sProviderInstance = staticFactory.invoke(null, delegateConstructor.newInstance());
if (sProviderInstance != null){
field.set("sProviderInstance", sProviderInstance);
Log.i("hook","Hook success!");
} else {
Log.i("hook","Hook failed!");
} catch (Throwable e) {
Log.w("hook",e);
e.printStackTrace();
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