在Android Studio中找不到符号类 [英] Cannot find symbol class in Android Studio

问题描述

我有两个项目A和B，其中B作为项目A的模块添加.我已经在A的Gradle构建文件中添加了依赖项.现在，我可以将B的类导入A中而不会出现任何错误(在编辑器中)，但是无法构建.首选项是项目B的一类.

I have two project A and B where B is added as a module of project A. I have added dependencies in A's Gradle build file. Now i can import B's class in A without any error (in editor) but can't build. Preferences is a class of project B.

Error:(22, 23) error: cannot find symbol class Preferences 

A的构建文件

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.0.0"

    defaultConfig {
        applicationId "com.example.A"
        minSdkVersion 9
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile project(':B')
}

B的构建文件

import org.apache.tools.ant.taskdefs.condition.Os

apply plugin: "android-library"

android {
    compileSdkVersion 18
    buildToolsVersion "21.0.0"

    defaultConfig {
        minSdkVersion 9
        targetSdkVersion 11
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles 'proguard.cfg'
        }
    }
    sourceSets.main {
        jniLibs.srcDir 'src/main/jniLibs'
        jni.srcDirs = [] //disable automatic ndk-build call
    }

    task ndkBuild(type: Exec) {
        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            commandLine 'ndk-build.cmd', '-C', file('src/main/jni').absolutePath
        } else {
            commandLine '/opt/adt-bundle-linux/android-ndk-r8e/ndk-build', '-C', file('src/main/jni').absolutePath
        }
        tasks.withType(JavaCompile) {
            compileTask -> compileTask.dependsOn ndkBuild
        }
    }

}

dependencies {
    compile 'com.android.support:support-v4:18.0.0'
}

如果删除导入，我可以成功构建项目(A).

I can successfully build the project(A) if remove the import.

推荐答案

我已经指出了问题所在.两个项目的TargetSdk version和support package version不相同.在用最新版本更改这些之后，我的问题就解决了.

I have pointed out the problem. TargetSdk version and support package version of two project are not same. After changing these with latest version, my problem is solved.

这篇关于在Android Studio中找不到符号类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！