Question

我有一个工作的android应用程序，我已经添加了pdfView库。添加库后，在应用程序中添加其他功能并在模拟器上运行，构建失败并显示以下跟踪：

compile project(':pdfLib')

以下是我所做的更改： 1.我在文件中包含了pdflib库 - ＆gt;新 - ＆gt;导入模块 2.在build.gradle文件中添加了行Caused by: java.lang.UnsatisfiedLinkError: Couldn't load vudroid from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/app.com.blynq.player-2.apk"],nativeLibraryDirectories=[/data/app-lib/app.com.blynq.player-2, /system/lib]]]: findLibrary returned null at java.lang.Runtime.loadLibrary(Runtime.java:355) at java.lang.System.loadLibrary(System.java:525) at org.vudroid.core.VuDroidLibraryLoader.load(VuDroidLibraryLoader.java:13) at org.vudroid.pdfdroid.codec.PdfContext.<clinit>(PdfContext.java:13) at com.joanzapata.pdfview.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:50) at com.joanzapata.pdfview.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:31) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask.run(FutureTask.java:234) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) at java.lang.Thread.run(Thread.java:841)。 3.使用添加的lib添加了一些简单的代码。

在运行时也收到以下异常：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "app.com.blynq.player"
        minSdkVersion 18
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile files('libs/jackson-annotations-2.7.4.jar')
    compile files('libs/jackson-core-2.7.4.jar')
    compile files('libs/jackson-databind-2.7.4.jar')
    compile 'org.apache.httpcomponents:httpclient-android:4.3.5.1'
    compile files('libs/universal-image-loader-1.9.5.jar')
    compile files('libs/jpedal_lgpl.jar')
    compile 'com.joanzapata.pdfview:android-pdfview:1.0.4@aar'


}

请帮我解决一下这个。

更新：

build.gradle：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="app.com.blynq.player.MainActivity">


    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:adjustViewBounds="true"
        android:src="@drawable/blynq_logo"
        />

    <VideoView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/videoView"
        android:layout_gravity="center"
        android:adjustViewBounds="true"
        android:visibility="invisible"
        />

    <com.joanzapata.pdfview.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="invisible"/>

</FrameLayout>

activity_main.xml中

videoView.setVisibility(View.INVISIBLE);
imageView.setVisibility(View.INVISIBLE);
pdfView.setVisibility(View.VISIBLE);
pdfView.fromFile(new File(mediaPath)).defaultPage(1).enableSwipe(false).load();

我在pdfview中设置pdf的代码：

 try
        {
            PdfReader reader = null;
            int currentPage = 1;
            int pageCount = 0;
            string destinationFolderPath = string.Format(@"{0}PageImages\{1}", BaseDataPath, Convert.ToString(documentId));

            if (!Directory.Exists(destinationFolderPath))
            {
                Directory.CreateDirectory(destinationFolderPath);
            }


            reader = new PdfReader(filePath);
            reader.RemoveUnusedObjects();
            pageCount = reader.NumberOfPages;
            string ext = ".png";

            for (int i = 1; i <= pageCount; i++)
            {
                PdfReader reader1 = new PdfReader(filePath);
                string destinationFilePath = string.Format(@"{0}/{1}{2}", destinationFolderPath, Convert.ToString(i), ext);
                reader1.RemoveUnusedObjects();
                Document doc = new Document(reader1.GetPageSizeWithRotation(currentPage));
                PdfCopy pdfCpy = new PdfCopy(doc, new FileStream(destinationFilePath, FileMode.Create));
                doc.Open();
                for (int j = 1; j <= 1; j++)
                {
                    PdfImportedPage page = pdfCpy.GetImportedPage(reader1, currentPage);
                    //pdfCpy.SetFullCompression();
                    pdfCpy.AddPage(page);
                    currentPage += 1;
                }
                doc.Close();
                pdfCpy.Close();
                reader1.Close();
                reader.Close();
            }
        }
        catch (Exception ex)
        {

            throw ex;
        }

Answer 1

试试这个，这将解决您的问题。

- Replace your compile project(':pdfLib') with
   **'com.joanzapata.pdfview:android-pdfview:1.0.4@aar'** or whatever library you want to add, because adding this type a library, it is
   download the library at run time and build the gradle
   properly,because adding library manually may occur some path issues
   etc.

Answer 2

如果您查看库的文档，它会说它基于VuDroid，不再维护。图书馆本身也不再维护;可能是因为VuDroid被弃用了。我建议您尝试一个仍在维护的库，例如：

或者，您可以按照here所述在WebView中加载PDF。

添加pdfview库后，Android studio构建失败

2 个答案: