Android：R.java：错误 预期

Question

我是android开发的初学者，并且正在关注developer.android.com上的培训指南（更好的教程也将受到高度赞赏）。当我开始收到此错误时，我正在添加操作栏。

Executing tasks: [:app:assembleDebug]

Configuration on demand is an incubating feature.
Relying on packaging to define the extension of the main artifact has been deprecated and is scheduled to be removed in Gradle 2.0
:app:preBuild
:app:compileDebugNdk UP-TO-DATE
:app:preDebugBuild
:app:checkDebugManifest
:app:preReleaseBuild
:app:prepareComAndroidSupportSupportV132000Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42000Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWearable5077Library UP-TO-DATE
:app:prepareComGoogleAndroidSupportWearable100Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources UP-TO-DATE
:app:processDebugManifest
:app:processDebugResources
:app:generateDebugSources
:app:compileDebugJava
C:\Users\Brian\AndroidStudioProjects\MyAndroidWear\app\build\generated\source\r\debug\com\example\brian\myandroidwear\R.java:400: error: <identifier> expected
    public static final int =action_settings=0x7f050018;
                           ^
1 error

 FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 12.271 secs

它还说

error:  <identifier> expected

我遇到的主要问题是R.java是由android studio生成的，我从未触及过它，所以我很困惑。

实际的R.java代码在这里。

 public static final class id {
    public static final int =action_settings=0x7f050018;
    public static final int action_error=0x7f05000b;
    public static final int action_search=0x7f050017;
    public static final int action_settings=0x7f050016;
    public static final int action_success=0x7f05000d;
    public static final int all=0x7f050004;
    public static final int animation=0x7f05000e;
    public static final int bottom=0x7f050003;
    public static final int button_send=0x7f050014;
    public static final int dismiss_overlay_button=0x7f050011;
    public static final int dismiss_overlay_explain=0x7f050010;
    public static final int edit_message=0x7f050013;
    public static final int error_message=0x7f05000c;
    public static final int hybrid=0x7f050009;
    public static final int left=0x7f050000;
    public static final int message=0x7f05000f;
    public static final int none=0x7f050005;
    public static final int normal=0x7f050006;
    public static final int right=0x7f050002;
    public static final int satellite=0x7f050007;
    public static final int terrain=0x7f050008;
    public static final int text=0x7f050012;
    public static final int title=0x7f050015;
    public static final int top=0x7f050001;
    public static final int watch_view_stub=0x7f05000a;
}

错误在= action_settings部分的函数的第一行抛出。

任何帮助都将非常感激。如果还有什么需要看的话请告诉我。我仍然习惯了android和android studio所以我仍然不确定一切都是为了帮助调试。

Answer 1

听起来你不小心在XML中定义了一个id为=action_setting的菜单项。

例如：

<menu>
    <item 
        android:id="@+id/=action_settings" />
</menu>

从菜单XML中删除=，你应该很高兴。

Answer 2

我有同样的问题，因为我在我的资源中定义了一个没有名字的字符串。喜欢：

<string name="">some text</string>

Answer 3

检查您的资源文件名应该遵循文件命名规则。例：

文件名无效：50x60.png有效文件名：my_pic.png

Answer 4

我有类似的问题。步骤1.在您的情况下删除/编辑导致错误的文件：“public static final int = action_settings = 0x7f050018;”

第2步。构建 - >清除。由于R.java无法修改并自动生成，因此不要在R.java中编辑任何内容。祝好运！ :)