chrome webview中出现"不支持的ABI"错误

Question

我按照以下说明编译,安装并成功运行了基于chromium 46(标签46.0.2490.71)的自定义webview:

https://www.chromium.org/developers/how-tos/android-build-instructions

并建立了忍者目标"system_webview_apk".

而且效果很棒!

现在我正在尝试将它集成到我的自定义android映像中,该映像基于从AOSP构建的lolipop 5.1.1_r29.构建和安装步骤有效,但是当应用程序试图给webview充气时,我有以下错误:

E/AndroidRuntime:  Caused by: java.lang.IllegalArgumentException: Unsupported ABI: null
 at dalvik.system.VMRuntime.getInstructionSet(VMRuntime.java:324)
 at dalvik.system.VMRuntime.is64BitAbi(VMRuntime.java:337)
 at android.webkit.WebViewFactory.getWebViewNativeLibraryPaths(WebViewFactory.java:286)

(帖子末尾的完整堆栈跟踪)

奇怪的是,如果我使用完全相同的 APK,并使用ADB安装它:

adb shell stop
adb pull /system/app/webview/webview.apk
adb shell rm -rf /system/app/webview/
adb shell start
adb install webview.apk

然后错误消失,webview正确显示.

接下来,如果我再次将它放回/ system/app:

adb uninstall com.android.webview
adb push webview.apk /system/app/webview/webview.apk
adb shell stop
adb shell start

它再次失败并出现同样的错误.

我对"不支持的ABI:null"的调查只给了我这个:https: //code.google.com/p/chromium/issues/detail？id = 559720

但它似乎没有相关性.

我需要在Android 5.1.1上基于chrome 46(至少)的webview.

任何帮助,线索或建议将不胜感激:)

一些额外的信息:

关于nexus 6:

root@shamu:/ # ll /system/lib/libwebv*
-rw-r--r-- root     root     31282132 2008-04-15 23:40 libwebviewchromium.so
-rw-r--r-- root     root         5376 2015-12-09 15:51 libwebviewchromium_loader.so
-rw-r--r-- root     root         9532 2015-12-09 15:51 libwebviewchromium_plat_support.so

Chromium构建配置:

$ cat chromium.gyp_env
{ 'GYP_DEFINES': 'target_arch=arm OS=android', }

$ cat .gclient
solutions = [
  { "name"        : "src",
    "url"         : "https://chromium.googlesource.com/chromium/src.git",
    "deps_file"   : "DEPS",
    "managed"     : False,
    "custom_deps" : {
    },
    "safesync_url": "",
  },
]
cache_dir = None
target_os = ["android"]

完整堆栈跟踪:

 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.webviewui/com.example.webviewui.MainActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class android.webkit.WebView
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
     at android.app.ActivityThread.access$800(ActivityThread.java:151)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
     at android.os.Handler.dispatchMessage(Handler.java:102)
     at android.os.Looper.loop(Looper.java:135)
     at android.app.ActivityThread.main(ActivityThread.java:5254)
     at java.lang.reflect.Method.invoke(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:372)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
  Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class android.webkit.WebView
     at android.view.LayoutInflater.createView(LayoutInflater.java:633)
     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
     at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
     at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
     at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
     at android.app.Activity.setContentView(Activity.java:2145)
     at com.example.webviewui.MainActivity.onCreate(MainActivity.java:48)
     at android.app.Activity.performCreate(Activity.java:5990)
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
     at android.app.ActivityThread.access$800(ActivityThread.java:151) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5254) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
  Caused by: java.lang.reflect.InvocationTargetException
     at java.lang.reflect.Constructor.newInstance(Native Method)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
     at android.view.LayoutInflater.createView(LayoutInflater.java:607)
     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55) 
     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682) 
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378) 
     at android.app.Activity.setContentView(Activity.java:2145) 
     at com.example.webviewui.MainActivity.onCreate(MainActivity.java:48) 
     at android.app.Activity.performCreate(Activity.java:5990) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
     at android.app.ActivityThread.access$800(ActivityThread.java:151) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5254) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
  Caused by: java.lang.IllegalArgumentException: Unsupported ABI: null
     at dalvik.system.VMRuntime.getInstructionSet(VMRuntime.java:324)
     at dalvik.system.VMRuntime.is64BitAbi(VMRuntime.java:337)
     at android.webkit.WebViewFactory.getWebViewNativeLibraryPaths(WebViewFactory.java:286)
     at android.webkit.WebViewFactory.loadNativeLibrary(WebViewFactory.java:397)
     at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:103)
     at android.webkit.WebView.getFactory(WebView.java:2194)
     at android.webkit.WebView.ensureProviderCreated(WebView.java:2189)
     at android.webkit.WebView.setOverScrollMode(WebView.java:2248)
     at android.view.View.<init>(View.java:3588)
     at android.view.View.<init>(View.java:3682)
     at android.view.ViewGroup.<init>(ViewGroup.java:497)
     at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:55)
     at android.webkit.WebView.<init>(WebView.java:544)
     at android.webkit.WebView.<init>(WebView.java:489)
     at android.webkit.WebView.<init>(WebView.java:472)
     at android.webkit.WebView.<init>(WebView.java:459)
     at java.lang.reflect.Constructor.newInstance(Native Method) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:288) 
     at android.view.LayoutInflater.createView(LayoutInflater.java:607) 
     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55) 
     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682) 
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378) 
     at android.app.Activity.setContentView(Activity.java:2145) 
     at com.example.webviewui.MainActivity.onCreate(MainActivity.java:48) 
     at android.app.Activity.performCreate(Activity.java:5990) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
     at android.app.ActivityThread.access$800(ActivityThread.java:151) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5254) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)    

Answer 1

为arm编译WebView时，Chromium（64.0.3282.134，以及可能的其他版本）将针对armv7。这会导致将本机库放在 apk 中的armeabi-v7a 文件夹下。当它安装在我的示例 armv7 Android 5.1.1 设备上时，Android 将运行 dex2opt 来处理 apk。在此过程中，它将在armeabi文件夹下查找本机库，而不是armeabi-v7a文件夹。因此，它永远找不到库，并且当 WebView 启动时它会失败。

Chromium 的消息来源评论说它不再支持 armeabi，因此为此进行构建似乎不可行。我确实尝试显式构建 ARM 版本 6，但编译失败。

我发现的解决方法是这样的：

1. 解压构建的 Chromium webview apk
2. 将库文件夹armeabi-v7a重命名为armeabi
3. 将所有内容压缩备份，将生成的文件重命名为 apk。（请注意，压缩时不要压缩内容。WebView 期望其某些资产不被压缩，压缩它们会导致运行时失败）。
4. 使用zipalign和apksigner使 apk 准备好安装
5. 安装生成的 apk 文件

这样做时，我观察到 Android 5.1.1 设备能够找到本机库并在启动 WebView 时使用它们。