パッケージRを修正するにはRが存在しませんsetContentView（R.layout.activity_main）それは影響を受けますか？最初のエラーメッセージで

Question

だった：

error: package R does not exist setContentView(R.layout.activity_main);

その後、私はので、私はMainActivityにパッケージ名を確認しようとしたともマニフェストファイルとインポートさmypackageとこの問題についてStackOverflowの中で答えをたくさん読んで。 Rは、問題のメッセージは、そのようになった：

Creating myapp-debug-unaligned.apk and signing it with a debug key... 
C:\Users\m0unta\AppData\Local\Android\android-sdk\tools\ant\build.xml:960: The following error occurred while executing this line: 
C:\Users\m0unta\AppData\Local\Android\android-sdk\tools\ant\build.xml:971: The following error occurred while executing this line: 
C:\Users\m0unta\AppData\Local\Android\android-sdk\tools\ant\build.xml:314: 
java.lang.NoClassDefFoundError: Could not initialize class sun.security.x509.X500Name 
    at com.android.sdklib.internal.build.SignedJarBuilder.writeSignatureBlock(SignedJarBuilder.java:384) 
    at com.android.sdklib.internal.build.SignedJarBuilder.close(SignedJarBuilder.java:273) 
    at com.android.sdklib.build.ApkBuilder.sealApk(ApkBuilder.java:795) 
    at com.android.ant.ApkBuilderTask.execute(ApkBuilderTask.java:371) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:396) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) 
    at com.android.ant.IfElseTask.execute(IfElseTask.java:124) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) 
    at com.android.ant.IfElseTask.execute(IfElseTask.java:124) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:396) 
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
    at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
    at org.apache.tools.ant.Task.perform(Task.java:348) 
    at org.apache.tools.ant.Target.execute(Target.java:435) 
    at org.apache.tools.ant.Target.performTasks(Target.java:456) 
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1405) 
    at org.apache.tools.ant.Project.executeTarget(Project.java:1376) 
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
    at org.apache.tools.ant.Project.executeTargets(Project.java:1260) 
    at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:286) 
    at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:555) 
    at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153) 
BUILD FAILED (total time: 2 seconds) 

注：私は、NetBeansを使用して、いないですAndroidのメーカー（多分これが問題であり、私は知らない）

Answer 1

R.javaが生成されますあなたのアプリを構築するとき。このエラーを解決するためにまず行うべきことは、プロジェクトをきれいにして再構築することです。引き続き同じエラーが発生する場合は、すべてのXMLファイルをチェックしてください。 AndroidManifest.xmlやレイアウトやその他のXMLリソースファイルのエラーは、R.javaの生成を停止します。

正式にサポートされているIDEなので、Android Studioに切り替えることを強くお勧めします。