我尝试使用非零arg构造函数（基于Dagger的构造函数依赖项注入）来实现自定义#include <string.h>
if (memcmp ( section, current_section, sizeof(section) ) == 0) {
// both arrays have the same content
}
和AppComponentFactory和Application实例，但是我的应用无法启动因为我的自定义Activity子类型没有零arg构造函数，并且堆栈跟踪暗示我的自定义Application没有被使用。
AppComponentFactory 更新：进一步检查后，Logcat中出现另一个错误，表明系统找不到我的自定义E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.domain.app, PID: 32670
java.lang.RuntimeException: Unable to instantiate application com.domain.app.CustomApplication: java.lang.InstantiationException: java.lang.Class<com.domain.app.CustomApplication> has no zero argument constructor
at android.app.LoadedApk.makeApplication(LoadedApk.java:1226)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6431)
at android.app.ActivityThread.access$1300(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1859)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
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:930)
Caused by: java.lang.InstantiationException: java.lang.Class<com.domain.app.CustomApplication> has no zero argument constructor
at java.lang.Class.newInstance(Native Method)
at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:76)
at android.app.Instrumentation.newApplication(Instrumentation.java:1155)
at android.app.LoadedApk.makeApplication(LoadedApk.java:1218)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6431)
at android.app.ActivityThread.access$1300(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1859)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
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:930)
。
AppComponentFactory答案 0 :(得分：0)
在我的情况下，这是由于未在清单中使用完全限定的类名引起的。看来，当对E/LoadedApk: Unable to instantiate appComponentFactory
java.lang.ClassNotFoundException: Didn't find class "com.domain.app.appname.CustomAppComponentFactory" on path: DexPathList[[zip file "/data/app/com.domain.app.appname-8VLkpKFTUtW8k-xEHX-oMQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.domain.app.appname-8VLkpKFTUtW8k-xEHX-oMQ==/lib/arm64, /system/lib64, /system/product/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.app.LoadedApk.createAppFactory(LoadedApk.java:256)
at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:855)
at android.app.LoadedApk.getClassLoader(LoadedApk.java:950)
at android.app.LoadedApk.getResources(LoadedApk.java:1188)
at android.app.ContextImpl.createAppContext(ContextImpl.java:2462)
at android.app.ContextImpl.createAppContext(ContextImpl.java:2454)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6343)
at android.app.ActivityThread.access$1300(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1859)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
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:930)
属性使用简写.ClassName语法时，系统会预先加上applicationId而不是清单元素中声明的包。为了使系统能够识别我的android:appComponentFactory，我必须更改清单：
CustomAppComponentFactory对此：
<application
android:appComponentFactory=".CustomAppComponentFactory"
....
>
请注意，我还必须在清单中的<application
android:appComponentFactory="com.domain.app.CustomAppComponentFactory"
....
>
元素中添加tools:replace="appComponentFactory"才能完成所有这些工作，但是对于与application的清单合并错误有明确的错误消息建议添加replace属性。