Question

我正在构建一个使用IOCipher和SQLCipher运行的安全Android应用程序。我的应用程序存储打算由第三方应用程序打开的PDF，DOC，DOCX，XLS，XLSX文件。目前我可以打开所有这些类型的文件，但 DOCX 。当我使用此方法打开存储在IOCipher中的docx文件时：

    File file = new File(path);
    Uri contentUri = Uri.parse(VFSContentProvider.FILES_URI + file.getName());

    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setData(contentUri);

Microsoft Word提示我错误消息：

无法打开文件＆＃34; myFile.docx.docx＆＃34; 。

发生这种情况对于我的所有docx文件，当内容提供商返回时，它似乎在文件末尾附加了两次mime类型......

以下是我的IOCipher内容提供商：

public class VFSContentProvider extends ContentProvider {
    public static final String TAG = "VFSContentProvider";
    public static final Uri FILES_URI = Uri
            .parse("content://com.plante.android.cobalt.VFSContentProvider/");
    private MimeTypeMap mimeTypeMap;

    @Override
    public boolean onCreate() {
        mimeTypeMap = MimeTypeMap.getSingleton();
        return true;
    }

    @Override
    public String getType(Uri uri) {
        String fileExtension = MimeTypeMap.getFileExtensionFromUrl(uri.toString());
        return mimeTypeMap.getMimeTypeFromExtension(fileExtension);
    }

    @Override
    public ParcelFileDescriptor openFile(Uri uri, String mode)
            throws FileNotFoundException {
        ParcelFileDescriptor[] pipe = null;
        InputStream in = null;

        try {
            pipe = ParcelFileDescriptor.createPipe();
            String path = uri.getPath();
            Log.i(TAG, "streaming " + path);
            // BufferedInputStream could help, AutoCloseOutputStream conflicts
            in = new FileInputStream(new File(path));
            new PipeFeederThread(in, new AutoCloseOutputStream(pipe[1])).start();
        } catch (IOException e) {
            Log.e(TAG, "Error opening pipe", e);
            throw new FileNotFoundException("Could not open pipe for: "
                    + uri.toString());
        }

        return (pipe[0]);
    }

    @Override
    public Cursor query(Uri url, String[] projection, String selection,
                        String[] selectionArgs, String sort) {
        // throw new RuntimeException("Operation not supported");
        return null;
    }

    @Override
    public Uri insert(Uri uri, ContentValues initialValues) {
        throw new RuntimeException("Operation not supported");
    }

    @Override
    public int update(Uri uri, ContentValues values, String where,
                      String[] whereArgs) {
        throw new RuntimeException("Operation not supported");
    }

    @Override
    public int delete(Uri uri, String where, String[] whereArgs) {
        throw new RuntimeException("Operation not supported");
    }

    static class PipeFeederThread extends Thread {
        InputStream in;
        OutputStream out;

        PipeFeederThread(InputStream in, OutputStream out) {
            this.in = in;
            this.out = out;
        }

        @Override
        public void run() {
            byte[] buf = new byte[8192];
            int len;

            try {
                while ((len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }

                in.close();
                out.flush();
                out.close();
            } catch (IOException e) {
                Log.e(TAG, "File transfer failed:", e);
            }
        }
    }

这是日志文件：

03-16 13:38:20.714 800-1325/? I/ActivityManager: START u0 {act=android.intent.action.VIEW dat=content://com.plante.android.cobalt.VFSContentProvider/0c8dbc0e1671e127ed9fcb2786b218d379f12888Finance_Corporate_BCP_Checklist_2014_MH20150115.docx flg=0x13000003 cmp=com.microsoft.office.word/com.microsoft.office.apphost.LaunchActivity} from uid 10182 on display 0

使用IOCipher和ContentProvider通过第三方应用程序打开DOCX文件时出现问题

0 个答案: