Question

我正在尝试获取docx文件，如下所示

private let MaxLuck = 1000.0
public extension Double {
    public static func random(lower: Double = 0, _ upper: Double = 100, luck: Double) -> Double {
        let weight = min(luck / MaxLuck, 1)
        return (Double(arc4random()) / 0xFFFFFFFF) * weight * (upper - lower) + lower
    }
}

现在的结果是：

路径：public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == MainActivity.RESULT_OK) { if (resultCode == RESULT_OK) { // Get the Uri of the selected file Uri uri = data.getData(); String uriString = uri.toString(); File myFile = new File(uriString); String path = myFile.getAbsolutePath(); filepath =path; String displayName = null; if (uriString.startsWith("content://")) { Cursor cursor = null; try { cursor = this.getContentResolver().query(uri, null, null, null, null); if (cursor != null && cursor.moveToFirst()) { displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)); txtFilename.setText(displayName); filename = displayName; } } finally { cursor.close(); } } else if (uriString.startsWith("file://")) { displayName = myFile.getName(); txtFilename.setText(displayName); filename = displayName; } } } }

文件名：/content:/com.estrongs.files/storage/emulated/0/Download/Imp%20Values.docx

现在如何将此文档转换为base64？

提前致谢。

Answer 1

试试这个，希望它能起作用，我为.pdf和.doc

做了

// Create new stopwatch.
Stopwatch stopwatch = new Stopwatch();

// Begin timing.
stopwatch.Start();

// Do something.
for (int i = 0; i < 1000; i++)
{
    Thread.Sleep(1);
}

// Stop timing.
stopwatch.Stop();

// Write result.
Console.WriteLine("Time elapsed: {0}", stopwatch.Elapsed);

选择文件：

public static String convertFileToByteArray(File f) {
    byte[] byteArray = null;
    try {
        InputStream inputStream = new FileInputStream(f);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] b = new byte[1024 * 11];
        int bytesRead = 0;

        while ((bytesRead = inputStream.read(b)) != -1) {
            bos.write(b, 0, bytesRead);
        }

        byteArray = bos.toByteArray();

        Log.e("Byte array", ">" + byteArray);

    } catch (IOException e) {
        e.printStackTrace();
    }
    return Base64.encodeToString(byteArray, Base64.NO_WRAP);
}

Answer 2

上面的代码总是返回nullpointerexception，但这解决了它而没有任何错误

// Converting File to Base64.encode String type using Method
    public String getStringFile(File f) {
        InputStream inputStream = null; 
        String encodedFile= "", lastVal;
        try {
            inputStream = new FileInputStream(f.getAbsolutePath());

        byte[] buffer = new byte[10240];//specify the size to allow
        int bytesRead;
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Base64OutputStream output64 = new Base64OutputStream(output, Base64.DEFAULT);

            while ((bytesRead = inputStream.read(buffer)) != -1) {
                output64.write(buffer, 0, bytesRead);
            }
        output64.close();
        encodedFile =  output.toString();
        } 
         catch (FileNotFoundException e1 ) {
                e1.printStackTrace();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        lastVal = encodedFile;
        return lastVal;
    }

将docx，doc转换为base64 android

2 个答案: