编译错误：错误：（81、18）错误：找不到符号方法addOnPageChangeListener（OnPageChangeListener）答案

【问题标题】：Compilation Error: Error:(81, 18) error: cannot find symbol method addOnPageChangeListener(OnPageChangeListener)编译错误：错误：（81、18）错误：找不到符号方法addOnPageChangeListener（OnPageChangeListener）
【发布时间】：2016-08-26 08:06:02
【问题描述】：

我的项目运行良好（备份项目仍然没有产生这个错误）但是当我为 Conact_Us 页面添加布局时，它产生了这个错误。（联系我们活动没有抛出任何错误）以下是我的 Gradle 构建消息

信息：Gradle 任务 [:app:assembleDebug] 在不一致的位置 'C:\Users\DELL\AppData\Local\Android\Sdk\add-ons\addon-google_apis-google-23-1' 中观察到包 ID 'add-ons;addon-google_apis-google-23'（预期 'C:\Users\DELL\AppData\Local\Android\Sdk\add-ons\addon-google_apis-google-23'）已经在 'C:\Users\DELL\AppData\Local\Android\Sdk\add-ons\addon-google_apis-google-23' 中观察到包 ID 'add-ons;addon-google_apis-google-23'。在“C:\Users\DELL\AppData\Local\Android\Sdk\add-ons\addon-google_apis-google-23-1”处跳过重复项 :app:preBuild UP-TO-DATE :app:preDebugBuild UP-TO-DATE :app:checkDebugManifest :app:preReleaseBuild UP-TO-DATE :app:prepareComAndroidSupportAnimatedVectorDrawable2400Beta1Library UP-TO-DATE :app:prepareComAndroidSupportAppcompatV72400Beta1Library UP-TO-DATE :app:prepareComAndroidSupportDesign2400Beta1Library UP-TO-DATE :app:prepareComAndroidSupportMediarouterV72300Library UP-TO-DATE :app:prepareComAndroidSupportMultidex101Library UP-TO-DATE :app:prepareComAndroidSupportRecyclerviewV72400Beta1Library UP-TO-DATE :app:prepareComAndroidSupportSupportV42400Library UP-TO-DATE :app:prepareComAndroidSupportSupportVectorDrawable2400Beta1Library UP-TO-DATE :app:prepareComDaimajiaSliderLibrary115Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServices902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAds902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAdsLite902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAnalytics902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAnalyticsImpl902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAppindexing902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAppinvite902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAuth902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAuthBase902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesBase902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesBasement902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesCast902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesDrive902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesFitness902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesGames902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesGcm902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesIdentity902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesIid902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesLocation902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesMaps902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesNearby902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesPanorama902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesPlus902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesSafetynet902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesTagmanager902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesTagmanagerApi902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesTasks902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesVision902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesWallet902Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesWearable902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseAnalytics902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseAnalyticsImpl902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseAuth902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseAuthCommon902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseAuthModule902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseCommon902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseConfig902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseCrash902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseDatabase902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseDatabaseConnection902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseIid902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseMessaging902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseStorage902Library UP-TO-DATE :app:prepareComGoogleFirebaseFirebaseStorageCommon902Library UP-TO-DATE :app:prepareDebugDependencies :app:compileDebugAidl 最新 :app:compileDebugRenderscript 最新 :app:generateDebugBuildConfig 最新 :app:mergeDebugShaders 最新 :app:compileDebugShaders 最新 :app:generateDebugAssets 最新 :app:mergeDebugAssets 最新 :app:generateDebugResValues 最新 :app:generateDebugResources 最新 :app:mergeDebugResources 最新 :app:processDebugManifest 最新 :app:processDebugResources 最新 :app:generateDebugSources 最新 :app:incrementalDebugJavaCompilationSafeguard UP-TO-DATE :app:compileDebugJavaWithJavac :app:compileDebugJavaWithJavac - 不是增量的（例如输出已更改，之前没有执行等）。 E:\Optasia\Optasia2\app\src\main\java\com\example\dell\optasia\WelcomeActivity.java 错误：(81, 18) 错误：找不到符号方法 addOnPageChangeListener(OnPageChangeListener) 注意：某些输入文件使用或覆盖已弃用的 API。注意：使用 -Xlint:deprecation 重新编译以获取详细信息。 :app:compileDebugJavaWithJavac 失败错误：任务“：app：compileDebugJavaWithJavac”执行失败。编译失败；有关详细信息，请参阅编译器错误输出。信息：构建失败信息：总时间：9.781 秒信息：2个错误信息：0 个警告信息：在控制台中查看完整的输出

这是我发生错误的代码

    package com.example.dell.optasia;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.example.dell.optasia.MainActivity;
import com.example.dell.optasia.R;

public class WelcomeActivity extends AppCompatActivity {

    private ViewPager viewPager;
    private MyViewPagerAdapter myViewPagerAdapter;
    private LinearLayout dotsLayout;
    private TextView[] dots;
    private int[] layouts;
    private Button btnSkip, btnNext;
    private PrefManager prefManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Checking for first time launch - before calling setContentView()
    prefManager = new PrefManager(this);
    if (!prefManager.isFirstTimeLaunch()) {
        launchHomeScreen();
        finish();
    }

    // Making notification bar transparent
    if (Build.VERSION.SDK_INT >= 21) {
        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
    }

    setContentView(R.layout.activity_welcome);

    viewPager = (ViewPager) findViewById(R.id.view_pager);
    dotsLayout = (LinearLayout) findViewById(R.id.layoutDots);
    btnSkip = (Button) findViewById(R.id.btn_skip);
    btnNext = (Button) findViewById(R.id.btn_next);


    // layouts of all welcome sliders
    // add few more layouts if you want
    layouts = new int[]{
            R.layout.welcome_slide1,
            R.layout.welcome_slide2,
            R.layout.welcome_slide3,
            R.layout.welcome_slide4};

    // adding bottom dots
    addBottomDots(0);

    // making notification bar transparent
    changeStatusBarColor();

    myViewPagerAdapter = new MyViewPagerAdapter();
    viewPager.setAdapter(myViewPagerAdapter);
    viewPager.addOnPageChangeListener(viewPagerPageChangeListener);

    btnSkip.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            launchHomeScreen();
        }
    });

    btnNext.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // checking for last page
            // if last page home screen will be launched
            int current = getItem(+1);
            if (current < layouts.length) {
                // move to next screen
                viewPager.setCurrentItem(current);
            } else {
                launchHomeScreen();
            }
        }
    });
}

private void addBottomDots(int currentPage) {
    dots = new TextView[layouts.length];

    int[] colorsActive = getResources().getIntArray(R.array.array_dot_active);
    int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive);

    dotsLayout.removeAllViews();
    for (int i = 0; i < dots.length; i++) {
        dots[i] = new TextView(this);
        dots[i].setText(Html.fromHtml("&#8226;"));
        dots[i].setTextSize(35);
        dots[i].setTextColor(colorsInactive[currentPage]);
        dotsLayout.addView(dots[i]);
    }

    if (dots.length > 0)
        dots[currentPage].setTextColor(colorsActive[currentPage]);
}

private int getItem(int i) {
    return viewPager.getCurrentItem() + i;
}

private void launchHomeScreen() {
    prefManager.setFirstTimeLaunch(false);
    startActivity(new Intent(WelcomeActivity.this, HomeScreen.class));
    finish();
}

//  viewpager change listener
ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {

    @Override
    public void onPageSelected(int position) {
        addBottomDots(position);

        // changing the next button text 'NEXT' / 'GOT IT'
        if (position == layouts.length - 1) {
            // last page. make button text to GOT IT
            btnNext.setText(getString(R.string.start));
            btnSkip.setVisibility(View.GONE);
        } else {
            // still pages are left
            btnNext.setText(getString(R.string.next));
            btnSkip.setVisibility(View.VISIBLE);
        }
    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {

    }

    @Override
    public void onPageScrollStateChanged(int arg0) {

    }
};

/**
 * Making notification bar transparent
 */
private void changeStatusBarColor() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        Window window = getWindow();
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.setStatusBarColor(Color.TRANSPARENT);
    }
}

/**
 * View pager adapter
 */
public class MyViewPagerAdapter extends PagerAdapter {
    private LayoutInflater layoutInflater;

    public MyViewPagerAdapter() {
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View view = layoutInflater.inflate(layouts[position], container, false);
        container.addView(view);

        return view;
    }

    @Override
    public int getCount() {
        return layouts.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object obj) {
        return view == obj;
    }


    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        View view = (View) object;
        container.removeView(view);
    }
}
}
error at  viewPager.addOnPageChangeListener(viewPagerPageChangeListener);

以下是我构建的 Gradle

 apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.dell.optasia"
        minSdkVersion 15
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
        multiDexEnabled true

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.daimajia.slider:library:1.1.5@aar'
    androidTestCompile 'junit:junit:4.12'
    compile 'com.android.support:support-v4:24.0.0'
    compile 'com.android.support:appcompat-v7:24.0.0-beta1'
    compile 'com.google.android.gms:play-services:9.0.2'
    compile 'com.android.support:design:24.0.0-beta1'
    compile 'com.android.support:multidex:1.0.0'
    compile 'com.google.android.gms:play-services-ads:9.0.2'
    compile 'com.google.android.gms:play-services-auth:9.0.2'
    compile 'com.google.android.gms:play-services-gcm:9.0.2'
    compile files('E:/Optasia/Optasia2/libs/mail.jar')
    compile files('E:/Optasia/Optasia2/libs/android-support-v4.jar')
    compile files('E:/Optasia/Optasia2/libs/additionnal.jar')
    compile files('E:/Optasia/Optasia2/libs/activation.jar')

}

【问题讨论】：

添加项目所需的特定playservice 不要像这样添加`compile 'com.google.android.gms:play-services:9.0.2'` 什么是viewPagerPageChangeListener？
它是我从 github 获得的滑块代码。没有我自己的。它没有在我的备份中产生任何这种错误。
错误不在您的 gradle 文件中，而是在您的 MainActivity 文件中，因为您设置了 viewpager.addOnPageChangeListener() 但在您的代码中，您的 this 方法不在哪里。
但是在库中没有初始化此滑块检查 - 示例如何使用该滑块然后尝试使用它。
请分享您的 WelcomeActivity.jave 类的全部代码，或者使用这个也适用于介绍滑块androidhive.info/2016/05/android-build-intro-slider-app

标签： android

【解决方案1】：

我怀疑您在代码中获得了一个 ViewPager 类，而没有定义 onPageChangeListener 方法。

你需要使用这个导入

android.support.v4.view.ViewPager

我还建议像这样清理你的依赖项

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.daimajia.slider:library:1.1.5@aar'
    androidTestCompile 'junit:junit:4.12'

    compile 'com.android.support:design:24.0.0-beta1'
    compile 'com.android.support:multidex:1.0.0'
    compile 'com.google.android.gms:play-services-ads:9.0.2'
    compile 'com.google.android.gms:play-services-auth:9.0.2'
    compile 'com.google.android.gms:play-services-gcm:9.0.2'
}

然后，如果这些文件引用你的本地项目，这里，然后删除 v4 JAR

compile files('E:/Optasia/Optasia2/libs/mail.jar')
compile files('E:/Optasia/Optasia2/libs/android-support-v4.jar')
compile files('E:/Optasia/Optasia2/libs/additionnal.jar')
compile files('E:/Optasia/Optasia2/libs/activation.jar')

如果您的 jar 文件位于 libs 目录中，则不需要这些行，因为该行编译了 libs 中的所有 jar。

compile fileTree(include: ['*.jar'], dir: 'libs')

【讨论】：

是的，我觉得我的依赖关系很混乱。这很有帮助。我正在调查它，如果我的问题得到解决，我会通知。

【解决方案2】：

您添加了两个版本的支持库。删除 jar 版本，因为我怀疑应该是没有 addOnPageChangeListener 的旧版本

删除

compile files('E:/Optasia/Optasia2/libs/android-support-v4.jar')

【讨论】：

删除这个解决了我面临的问题！非常感谢！