我在使用Android Studio导入ViewPager时遇到问题？

Question

I'm trying to import a project into Android Studio. I'm getting weird errors.

Information:java: Errors occurred while compiling module 'library'
Information:Compilation completed with 100 errors and 5 warnings in 26 sec
Error:(31, 31) java: package android.support.v4.view does not exist
/Users/clxxxii/Downloads/JakeWharton-ViewPagerIndicator-8cd549f/library/src/com/viewpagerindicator/TitlePageIndicator.java

In the class TitlePageIndicator, these imports aren't working.

import android.support.v4.view.MotionEventCompat;
import android.support.v4.view.ViewConfigurationCompat;
import android.support.v4.view.ViewPager;

Android studio recognizes android.support.v4.view. but not ViewPager, ViewConfigurationCompat nor MotionEventCompat. Do you know what the problem could be?

///////

apply plugin: 'com.android.application'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile project(':android-sdks:extras:google:google_play_services:libproject:google-play-services_lib')
    compile project(':Downloads:Android Group Chat App using Sockets:android-websockets-master')
    compile project(':Downloads:JakeWharton-ViewPagerIndicator-8cd549f:library')
    compile project(':Downloads:BaseGameUtils')
    compile project(':Downloads:polljoy-android-master:PolljoySDK')
}

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    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')
    }
}

Answer 1

Your gradle.build file is missing these:

dependencies {
    compile 'com.android.support:support-v4:22.0.0'
    compile 'com.android.support:appcompat-v7:22.0.0'
}