PdfrenderをFragmentで実装

PDFrenderをFragmentで実装しようと思っています

java
1@Override
2    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
3
4        View view = inflater.inflate(R.layout.pdf_render_fragment, container, false);
5        return view;
6    }
7
8    @Override
9    public void onViewCreated(View view, Bundle savedInstanceState) {
10        super.onViewCreated(view, savedInstanceState);
11
12        mPdfimage = (ImageView) view.findViewById(R.id.pdf_view);
13        mPreviousbtn = (Button)view.findViewById(R.id.btn_previous);
14        mNextbtn = (Button)view.findViewById(R.id.btn_next);
15
16        mPreviousbtn.setOnClickListener(onActionListener(-1));
17        mNextbtn.setOnClickListener(onActionListener(1));
18
19        int index = 0;
20        if (null != savedInstanceState) {
21            index = savedInstanceState.getInt("mCurrent_page", 0);
22        }
23        showpage(index);
24    }
25
26    @Override
27    public void onAttach(Activity activity) {
28        super.onAttach(activity);
29        try {
30            openRender(activity);
31        } catch (IOException e) {
32            e.printStackTrace();
33            activity.finish();
34        }
35    }
36
37    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
38    private void openRender(Activity activity) throws IOException {
39
40        try {
41
42            mFileDescriptor = activity.getAssets().openFd("sample.pdf").getParcelFileDescriptor();
43            mPdfRenderer = new PdfRenderer(mFileDescriptor);
44
45        }catch (Exception e){
46            e.printStackTrace();
47        }
48    }
49
50    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
51    private void showpage(int index){
52        if (mPdfRenderer.getPageCount() <= index){
53            return;
54        }
55
56        Bitmap bitmap = Bitmap.createBitmap(mCurrentPage.getWidth(),mCurrentPage.getHeight(), Bitmap.Config.ARGB_8888);
57        mCurrentPage.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
58
59        mPdfimage.setImageBitmap(bitmap);
60    }
61
62    private  View.OnClickListener onActionListener(final int i) {
63        return new View.OnClickListener() {
64            @TargetApi(Build.VERSION_CODES.LOLLIPOP)
65            @Override
66            public void onClick(View v) {
67
68                if (i < 0) {
69                    showpage(mCurrentPage.getIndex() - 1);
70                } else {
71                    showpage(mCurrentPage.getIndex() + 1);
72                }
73            }
74        };
75    }
76}

参考プロジェクトを見てプログラムを組んでいまして、とりあえずＰＤＦを表示できればいいと思ってやっているのですが、エラーが出てしまいました。

java
1 java.lang.NoClassDefFoundError: android.graphics.pdf.PdfRenderer
2                                                                                           at com.example.myapplication.Fragment.PdfRenderFragment.openRender(PdfRenderFragment.java:74)
3                                                                                           at com.example.myapplication.Fragment.PdfRenderFragment.onAttach(PdfRenderFragment.java:61)
4                                                                                           at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:849)
5                                                                                           at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
6                                                                                           at android.app.BackStackRecord.run(BackStackRecord.java:684)
7                                                                                           at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1453)
8                                                                                           at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
9                                                                                           at android.os.Handler.handleCallback(Handler.java:733)
10                                                                                           at android.os.Handler.dispatchMessage(Handler.java:95)
11                                                                                           at android.os.Looper.loop(Looper.java:146)
12                                                                                           at android.app.ActivityThread.main(ActivityThread.java:5602)
13                                                                                           at java.lang.reflect.Method.invokeNative(Native Method)
14                                                                                           at java.lang.reflect.Method.invoke(Method.java:515)
15                                                                                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
16                                                                                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
17                                                                                           at dalvik.system.NativeStart.main(Native Method)