1.Hook思想
应用在Application中初始化hookWebView
/**
* Hook思想,解决root和system应用第一次无法使用webview
* 报错：java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes
*/
public 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) {
LogUtils.d("sProviderInstance isn't null");
return;
}
Method getProviderClassMethod;
if (sdkInt >22) {
getProviderClassMethod = factoryClass.getDeclaredMethod("getProviderClass");
}else if (sdkInt ==22) {
getProviderClassMethod = factoryClass.getDeclaredMethod("getFactoryClass");
}else {
LogUtils.d("Don't need to Hook WebView");
return;
}
getProviderClassMethod.setAccessible(true);
Class providerClass = (Class) getProviderClassMethod.invoke(factoryClass);
Class delegateClass = Class.forName("android.webkit.WebViewDelegate");
Constructor providerConstructor = providerClass.getConstructor(delegateClass);
if (providerConstructor !=null) {
providerConstructor.setAccessible(true);
Constructor declaredConstructor = delegateClass.getDeclaredConstructor();
declaredConstructor.setAccessible(true);
sProviderInstance = providerConstructor.newInstance(declaredConstructor.newInstance());
LogUtils.d("sProviderInstance:{}", sProviderInstance);
field.set("sProviderInstance", sProviderInstance);
}
LogUtils.d("Hook done!");
}catch (Throwable e) {
}
}
2.修改framework
framewor/base/core/java/android/webkit/WebViewFactory.java
@@ -148,10 +148,10 @@ public final class WebViewFactory {
if (sProviderInstance != null) return sProviderInstance;
final int uid = android.os.Process.myUid();
- if (uid == android.os.Process.ROOT_UID || uid == android.os.Process.SYSTEM_UID) {
+ /*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");
- }
+ }*/
Trace.traceBegin(Trace.TRACE_TAG_WEBVIEW, "WebViewFactory.getProvider()");
这种方式会导致系统不安全，不推荐；最好根据自己应用的包名加以判断
