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android - java.lang.InstantiationException : class has no zero argument constructor

我正在尝试使用BroadcastReceiver作为内部类来跟踪网络状态,但标题中出现异常。我应该怎么做才能解决这个问题?publicclassNetworkChangeReceiverextendsBroadcastReceiver{@OverridepublicvoidonReceive(Contextcontext,Intentintent){finalConnectivityManagerconnMgr=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);finalandroid

android - java.lang.InstantiationException : class has no zero argument constructor

我正在尝试使用BroadcastReceiver作为内部类来跟踪网络状态,但标题中出现异常。我应该怎么做才能解决这个问题?publicclassNetworkChangeReceiverextendsBroadcastReceiver{@OverridepublicvoidonReceive(Contextcontext,Intentintent){finalConnectivityManagerconnMgr=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);finalandroid

android - 这是什么警告: Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute

这个问题在这里已经有了答案:Whatisthe"IgnoringInnerClassesattribute"warningoutputduringcompilation?(4个回答)关闭8年前。我创建了3个布局HDPI和MDPI和LDPI,我编辑了xml文件中的任何一个,在控制台中,它们显示错误:warning:IgnoringInnerClassesattributeforananonymousinnerclassthatdoesn'tcomewithanassociatedEnclosingMethodattribute.(Thisclasswasprobablyproducedb

android - 这是什么警告: Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute

这个问题在这里已经有了答案:Whatisthe"IgnoringInnerClassesattribute"warningoutputduringcompilation?(4个回答)关闭8年前。我创建了3个布局HDPI和MDPI和LDPI,我编辑了xml文件中的任何一个,在控制台中,它们显示错误:warning:IgnoringInnerClassesattributeforananonymousinnerclassthatdoesn'tcomewithanassociatedEnclosingMethodattribute.(Thisclasswasprobablyproducedb

Android:FileProvider IllegalArgumentException 无法找到包含/data/data/**/files/Videos/final.mp4 的已配置根目录

我正在尝试使用FileProvider从私有(private)路径播放视频。面对java.lang.IllegalArgumentException:Failedtofindconfiguredrootthatcontains/data/data/XXXXX(Package)/files/Videos/final.mp4代码:Java代码:FileimagePath=newFile(getFilesDir(),"Videos");FilenewFile=newFile(imagePath,"final.mp4");Log.d(TAG,"-------------newFile:"+ne

Android:FileProvider IllegalArgumentException 无法找到包含/data/data/**/files/Videos/final.mp4 的已配置根目录

我正在尝试使用FileProvider从私有(private)路径播放视频。面对java.lang.IllegalArgumentException:Failedtofindconfiguredrootthatcontains/data/data/XXXXX(Package)/files/Videos/final.mp4代码:Java代码:FileimagePath=newFile(getFilesDir(),"Videos");FilenewFile=newFile(imagePath,"final.mp4");Log.d(TAG,"-------------newFile:"+ne

android - java.lang.IllegalArgumentException : Bad class: class java. util.GregorianCalendar

我在使用GregorianCalendar时收到此异常java.lang.IllegalArgumentException:错误的类:类java.util.GregorianCalendar谁知道如何解决,请帮帮我。p/s:我使用了以下代码:CalendarsomeDate=GregorianCalendar.getInstance();someDate.add(Calendar.DAY_OF_YEAR,-7);SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");StringformattedDate

android - java.lang.IllegalArgumentException : Bad class: class java. util.GregorianCalendar

我在使用GregorianCalendar时收到此异常java.lang.IllegalArgumentException:错误的类:类java.util.GregorianCalendar谁知道如何解决,请帮帮我。p/s:我使用了以下代码:CalendarsomeDate=GregorianCalendar.getInstance();someDate.add(Calendar.DAY_OF_YEAR,-7);SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");StringformattedDate

android - Proguard 问题 "Warning:Ignoring InnerClasses attribute for an anonymous inner class"

我不知道该如何描述这个问题。我搜索了很多,但没有找到任何解决方案。这个解决方案也没有帮助我-keepattributesEnclosingMethod:dependencies{compileproject(':libraries:material-drawer')compilefileTree(dir:'libs',include:['*.jar'])testCompile'junit:junit:4.12'compile'com.android.support:appcompat-v7:23.2.0'compile'com.android.support:recyclerview-

android - Proguard 问题 "Warning:Ignoring InnerClasses attribute for an anonymous inner class"

我不知道该如何描述这个问题。我搜索了很多,但没有找到任何解决方案。这个解决方案也没有帮助我-keepattributesEnclosingMethod:dependencies{compileproject(':libraries:material-drawer')compilefileTree(dir:'libs',include:['*.jar'])testCompile'junit:junit:4.12'compile'com.android.support:appcompat-v7:23.2.0'compile'com.android.support:recyclerview-