Android Studio“无法解析符号字符串" [英] Android Studio "cannot resolve symbol String"

问题描述

我有一个在 Eclipse 中启动的小项目.然后我将其导出为 gradle 文件，然后将其导入 AS (0.5.7).

I have a small project that was started in Eclipse. I then exported it to a gradle file, and imported it to AS (0.5.7).

起初，似乎没有多少工作正常，但是在构建 => 制作项目"之后，我似乎没有遇到任何突出显示的错误.

At first, not much seemed to work as it should, but after a "build => make project", I didn't seem to get any highlighted errors or so.

所以我尝试在模拟设备上运行该应用程序.好吧，该设备从未启动，现在我在提到String"、ArrayList"等时看到红色波浪线，说它无法解析符号".

So I tried to run the app to an emulated device. Well, the device never launched, and now I get red squiggly lines under mentions of "String", "ArrayList" etc, saying it "cannot resolve the symbol".

什么?

我尝试过清理和重建，以及将项目与 gradle 文件同步".

I have tried cleaning and rebuilding, as well as "sync project with gradle files".

我该往哪里去?我很想开始在 AS 中进行开发！

Where do I go from here? I want to get going with developing in AS so bad!

项目设置截图:http://i.imgur.com/ycNyPaT.png

build.gradle 的内容:

Contents of build.gradle:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.+'
    }
}
apply plugin: 'android'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
}

android {
    compileSdkVersion 19
    buildToolsVersion "19.0.1"

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot('tests')

        // Move the build types to build-types/<type>
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/<type>/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

推荐答案

有更简单的我认为更正确的方法:

There is simpler and I think more correct way:

对我来说，这成功解决了问题(由 PC 意外断电引起)

For me this successfully resolved the issue (was caused by surprising power off of PC)

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