加载插件时，获取资源报错'android.content.res.Resources android.content.Context.getResources()' on a null object reference #672

HQlin · 2021-11-11T09:04:09Z

2021-11-11 13:00:06.767 894-894/com.tencent.shadow.sample.host E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.tencent.shadow.sample.host:plugin, PID: 894
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tencent.shadow.sample.host/com.tencent.shadow.sample.plugin.runtime.PluginDefaultProxyActivity}: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at com.tencent.shadow.core.loader.delegates.ShadowActivityDelegate.onCreate(ShadowActivityDelegate.kt:152)
at com.tencent.shadow.core.runtime.container.PluginContainerActivity.onCreate(PluginContainerActivity.java:84)
at android.app.Activity.performCreate(Activity.java:7994)
at android.app.Activity.performCreate(Activity.java:7978)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at com.tencent.shadow.core.runtime.ShadowContext.getResources(ShadowContext.java:108)
at androidx.appcompat.app.AppCompatActivity.getResources(AppCompatActivity.java:577)
at com.bzl.inner.ui.activity.MySplashActivity.getSuperResources(MySplashActivity.java:103)
at com.bzl.inner.ui.activity.MySplashActivity.getResources(MySplashActivity.java:37)
at android.view.ContextThemeWrapper.initializeTheme(ContextThemeWrapper.java:210)
at android.view.ContextThemeWrapper.getTheme(ContextThemeWrapper.java:175)
at android.content.Context.obtainStyledAttributes(Context.java:770)
at androidx.appcompat.widget.TintTypedArray.obtainStyledAttributes(TintTypedArray.java:54)
at androidx.appcompat.app.AppCompatDelegateImpl.attachToWindow(AppCompatDelegateImpl.java:792)
at androidx.appcompat.app.AppCompatDelegateImpl.(AppCompatDelegateImpl.java:329)
at androidx.appcompat.app.AppCompatDelegateImpl.(AppCompatDelegateImpl.java:294)
at androidx.appcompat.app.SkinAppCompatDelegateImpl.(SkinAppCompatDelegateImpl.java:25)
at androidx.appcompat.app.SkinAppCompatDelegateImpl.get(SkinAppCompatDelegateImpl.java:18)
at com.bzl.basever.ui.base.AbstractBaseActivity.getDelegate(AbstractBaseActivity.java:161)
at androidx.appcompat.app.AppCompatActivity.attachBaseContext(AppCompatActivity.java:107)
at com.tencent.shadow.core.runtime.PluginActivity.setHostContextAsBase(PluginActivity.java:62)
at com.tencent.shadow.core.loader.delegates.ShadowActivityDelegate.initPluginActivity(ShadowActivityDelegate.kt:173)
at com.tencent.shadow.core.loader.delegates.ShadowActivityDelegate.onCreate(ShadowActivityDelegate.kt:122)
at com.tencent.shadow.core.runtime.container.PluginContainerActivity.onCreate(PluginContainerActivity.java:84)
at android.app.Activity.performCreate(Activity.java:7994)
at android.app.Activity.performCreate(Activity.java:7978)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

你好，插件的资源管理有哪些要注意的地方呢？比如说插件有使用skin-support换肤、butterknife-gradle-plugin这些是否对宿主启动插件时加载资源有影响？

shifujun · 2021-11-11T09:20:01Z

从堆栈能确定这是bug。

Shadow/projects/sdk/core/runtime/src/main/java/com/tencent/shadow/core/runtime/ShadowContext.java

Line 103 in 15c0cd9

Context baseContext = getBaseContext();

这里依赖baseContext获取hostContext了，但被调用时attachBaseContext还没有执行到。

这里应该可以通过让ShadowContext主动持有hostContext来修复。我晚一些提PR。

虽然我应该能构造测试用例，但最好你也能提供一下你的测试代码。

说到换肤这个场景，Shadow能否支持主要取决于换肤的代码是如何实现的。如果它完全依赖公开API，比如通过Context、Resource机制来实现的，Shadow应该是能够支持的。比如之前也有issue提到的一个sdk，我测试过：#595 (comment)

HQlin · 2021-11-12T04:09:52Z

抱歉，因为是公司代码不能提供。我尝试自己构建用例，但是不能复现…

shifujun · 2021-11-15T06:50:21Z

你前面的堆栈显示这里试图在Activity的attachBaseContext方法调用super.attachBaseContext之前就getResource。

我起初看到androidx.appcompat.app.SkinAppCompatDelegateImpl的包名，以为这是官方的代码呢。搜了一下看起来不是。

我现在也写不出正常情况下在调用super.attachBaseContext之前就getResource能正常跑的例子。

HQlin · 2021-11-16T09:25:43Z

androidx.appcompat.app.SkinAppCompatDelegateImpl是skin.support:skin-support-appcompat:4.0.4库的，临时解决方法是我把插件的父类activity舍弃skin.support换肤功能，注释以下代码：
/**
* Android Skin Support 需要添加的配置

@NonNull
@Override
public AppCompatDelegate getDelegate() {
    return SkinAppCompatDelegateImpl.get(this, this);
}

*/

shifujun added the bug Something isn't working label Nov 11, 2021

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加载插件时，获取资源报错'android.content.res.Resources android.content.Context.getResources()' on a null object reference #672

加载插件时，获取资源报错'android.content.res.Resources android.content.Context.getResources()' on a null object reference #672

HQlin commented Nov 11, 2021

shifujun commented Nov 11, 2021

HQlin commented Nov 12, 2021

shifujun commented Nov 15, 2021

HQlin commented Nov 16, 2021

加载插件时，获取资源报错'android.content.res.Resources android.content.Context.getResources()' on a null object reference #672

加载插件时，获取资源报错'android.content.res.Resources android.content.Context.getResources()' on a null object reference #672

Comments

HQlin commented Nov 11, 2021

shifujun commented Nov 11, 2021

HQlin commented Nov 12, 2021

shifujun commented Nov 15, 2021

HQlin commented Nov 16, 2021