0

我想使用 PdfViewer 库在我的 Android 应用程序中打开一个 .pdf 文件。我已经下载了库文件并将其添加到 lib 文件夹中。我还添加了清单上的权限。现在浏览文件后，它将显示加载程序对话框“加载 PDF 页面”，并且文件不显示。这是我的代码。

//浏览pdf文件

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("application/pdf");              
startActivityForResult(intent, PICK_FILE_REQUEST);

//onActivityResult

public void onActivityResult(final int requestCode, int resultCode,
            Intent data) {
        try {
            switch (requestCode) {
                case PICK_FILE_REQUEST:
                if (resultCode == RESULT_OK) {
                    try {
                        //To read PDF file
                        Uri selectedFile = data.getData();
                        String path =  selectedFile.getPath().toString();

                        final Intent intent = new Intent(MainActivity.this, ViewPdf.class);
                        intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
                        startActivity(intent);
                    } catch (Exception e) {
                        ShowDialog_Ok("Error", "Cannot Open File");
                    }
                }
                break;
            }
        } catch (Exception e) {
        }
    }

ViewPdf.class

public class ViewPdf extends PdfViewerActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
    }

    public int getPreviousPageImageResource() {
        return R.drawable.left_arrow;
    }

    public int getNextPageImageResource() {
        return R.drawable.right_arrow;
    }

    public int getZoomInImageResource() {
        return R.drawable.zoom_in;
    }

    public int getZoomOutImageResource() {
        return R.drawable.zoom_out;
    }

    public int getPdfPasswordLayoutResource() {
        return R.layout.pdf_file_password;
    }

    public int getPdfPageNumberResource() {
        return R.layout.dialog_pagenumber;
    }

    public int getPdfPasswordEditField() {
        return R.id.etPassword;
    }

    public int getPdfPasswordOkButton() {
        return R.id.btOK;
    }

    public int getPdfPasswordExitButton() {
        return R.id.btExit;
    }

    public int getPdfPageNumberEditField() {
        return R.id.pagenum_edit;
    }
}
4

1 回答 1

1

在您的项目中添加 PDFViewer 作为库，按照此处的指导将其资源复制到您的项目中。这是我的工作代码。我正在从资产文件夹中读取 pdf。根据您的要求进行定制。1.从上面的链接下载pdf阅读器项目。2. 复制项目中的所有资源。3.从 PdfViewerActivity 扩展您的活动（要在其中显示 pdf）。4. 在 yourpdfview 活动中复制 pdfreader 项目中的所有方法。5.运行。快乐编码

   AssetManager assetManager = getAssets();
   InputStream in = null;
   OutputStream out = null;
   File file = new File(getFilesDir(), "ABC.pdf");
   try {
    in = assetManager.open("ABC.pdf");
    out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);

    copyFile(in, out);
    in.close();
    in = null;
    out.flush();
    out.close();
    out = null;
} catch (Exception e) {
    Log.e("tag", e.getMessage());
}

 Intent intent = new Intent(this, YourNextActivityName.class);
 intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, getFilesDir() +           "/ABC.pdf");
startActivity(intent);

}

   private void copyFile(InputStream in, OutputStream out) throws    IOException {
  byte[] buffer = new byte[1024];
  int read;
  while ((read = in.read(buffer)) != -1) {
    out.write(buffer, 0, read);
}
}

yourpdfview 活动的方法是

   public int getPreviousPageImageResource() { return R.drawable.left_arrow; }
public int getNextPageImageResource() { return R.drawable.right_arrow; }
public int getZoomInImageResource() { return R.drawable.zoom_in; }
public int getZoomOutImageResource() { return R.drawable.zoom_out; }
public int getPdfPasswordLayoutResource() { return         R.layout.pdf_file_password; }
public int getPdfPageNumberResource() { return R.layout.dialog_pagenumber; }
public int getPdfPasswordEditField() { return R.id.etPassword; }
public int getPdfPasswordOkButton() { return R.id.btOK; }
public int getPdfPasswordExitButton() { return R.id.btExit; }
public int getPdfPageNumberEditField() { return R.id.pagenum_edit; }
于 2015-05-11T11:21:09.800 回答