Qoppa PDF Android NullPointer

Question

我正在尝试qoppapdf在我的应用程序，它运行到一个NullPointer在以下代码:

 PDFDocument pdf = null;
    try {
        pdf = new PDFDocument(url, null);
    } catch (PDFException e) {
        e.printStackTrace();
    }
    PDFPage page = pdf.getPage(0);

错误读取:

06-01 17:29:59.687  24761-24761/app W/dalvikvm﹕ Exception Ljava/lang/NullPointerException; thrown while initializing Lcom/qoppa/android/pdfProcess/PDFPage;
06-01 17:29:59.687  24761-24761/app D/AndroidRuntime﹕ Shutting down VM
06-01 17:29:59.687  24761-24761/app W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x413d22a0)
06-01 17:29:59.757  24761-24763/app D/dalvikvm﹕ GC_CONCURRENT freed 2569K, 26% free 10659K/14343K, paused 4ms+13ms, total 68ms
06-01 17:29:59.757  24761-24761/app E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.ExceptionInInitializerError
            at com.qoppa.android.pdfProcess.PDFDocument$1.b(Unknown Source)
            at com.qoppa.android.pdfViewer.e.p.b(Unknown Source)
            at com.qoppa.android.pdfProcess.PDFDocument.b(Unknown Source)
            at com.qoppa.android.pdfProcess.PDFDocument.<init>(Unknown Source)
            at com.qoppa.android.pdfProcess.PDFDocument.<init>(Unknown Source)
            at com.qoppa.android.pdfProcess.PDFDocument.<init>(Unknown Source)

用作输入的url是有效的，并且与其他PDF-Viewer一起工作良好。有人遇到过这样或类似的问题吗?我做错了吗?

我很高兴收到你的来信:-)

Answer 1

请在加载文档之前添加以下代码:

//这个静态允许SDK访问字体资源，
//它必须在使用库之前设置
StandardFontTF。