卡片幻灯片库找不到符号变量/类android studio

Question

Error:(25, 31) error: package android.support.v4.util does not exist
Error:(26, 31) error: package android.support.v4.view does not exist
Error:(27, 31) error: package android.support.v4.view does not exist
Error:(2189, 17) error: cannot find symbol class SparseArrayCompat
Error:(692, 48) error: cannot find symbol variable MotionEventCompat
Error:(821, 28) error: cannot find symbol variable MotionEventCompat
Error:(858, 27) error: cannot find symbol variable MotionEventCompat
Error:(865, 29) error: cannot find symbol variable MotionEventCompat
Error:(976, 17) error: cannot find symbol variable MotionEventCompat
Error:(977, 17) error: cannot find symbol variable MotionEventCompat
Error:(1976, 9) error: cannot find symbol variable ViewCompat
Error:(2361, 52) error: cannot find symbol variable ViewCompat
Error:(2371, 52) error: cannot find symbol class SparseArrayCompat
Error:(2415, 60) error: cannot find symbol variable ViewCompat
Error:(2425, 60) error: cannot find symbol class SparseArrayCompat
Error:(2464, 26) error: cannot find symbol variable ViewCompat
    Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
:main:compileReleaseJavaWithJavac FAILED
Error:Execution failed for task ':main:compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

在将项目导入android studio时，它显示了一个错误，即它没有从库中找到某些项，这可能是什么问题？

我正在等待答复，如果您能找到任何可能的解决方案，请告诉我，我将非常感谢您

**This my build.gradle code**


apply plugin: 'com.android.application'
android {
    //compileSdkVersion 'Google Inc.:Google APIs:23'
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId ""
        minSdkVersion 16
        targetSdkVersion 23
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}
dependencies {
    compile project(':main')
    compile project(':circularImageView')
    compile project(':com_facebook_android')
    compile project(':main')
    compile 'com.android.support:support-v4:23.3.0'
    compile 'com.google.android.gms:play-services:+'
    compile files('libs/commons-codec-1.9.jar')
    compile files('libs/picasso-2.5.2.jar')
    compile files('libs/signpost-commonshttp4-1.2.1.1.jar')
    compile files('libs/signpost-core-1.2.1.1.jar')
    compile files('libs/signpost-jetty6-1.2.1.1.jar')
    compile files('libs/simple-side-drawer2.jar')
    compile files('libs/twitter4j-core-2.2.5.jar')
}

Answer 1

既然您使用的是Android Studio，我假设您使用的是Gradle。确保gradle构建脚本（build.gradle）中有适当的依赖项。例如，当它说“错误：包android.support.v4.util不存在”时，您可能缺少support v4库。您需要以下内容：

dependencies {
    compile 'com.android.support:support-v4:23.3.0'
} 

等等