java.io.FileNotFoundException：打開失敗：ENOENT（沒有這樣的文件或目錄）

Question

不知道我到底在做什么錯，但是在嘗試將位圖保存到png文件時不斷出現此錯誤：

java.io.FileNotFoundException：/storage/emulated/0/storage/emulated/0/Pictures/HelloCamera/VID_20150806_124818.png：打開失敗：ENOENT（無此類文件或目錄）

  private File getVideoThumb(String mediaPath, Uri videoUri) {
    Bitmap bmThumbnail;
    bmThumbnail = ThumbnailUtils.createVideoThumbnail(mediaPath,   MediaStore.Video.Thumbnails.MINI_KIND);
    File fPath = Environment.getExternalStorageDirectory();
    String[] tokens = mediaPath.split("\\.(?=[^\\.]+$)");
    File f = null;
    f = new File(fPath, tokens[0] + ".png");
    FileOutputStream out = null;
    try {
        out = new FileOutputStream(f);
        bmThumbnail.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance
        // PNG is a lossless format, the compression factor (100) is ignored
    } catch (Exception e) {
        Log.d(Constants.DEBUG, "ERROR saving the compressed bitmap " + e);
        e.printStackTrace();
    } finally {
        try {
            if (out != null) {
                out.flush();
                out.close();
            }
        } catch (IOException e) {
            Log.d(Constants.DEBUG, "ERROR closing out stream for file for bitmap");
            e.printStackTrace();
        }
    }
     return f;
 }

似乎指出該錯誤是目錄/storage/emulated/0/的重復

我如何從中取出第二個正則表達式我嘗試了這個：

int index = mediaPath.lastIndexOf("\\");
String fileName = mediaPath.substring(index + 1);
String[] tokens = fileName.split("\\.(?=[^\\.]+$)");

Answer 1

如果你試試：

File f = null;
f = new File(mediaPath);
System.out.println(f.getName().split("\\.")[0] + ".png");

您將獲得所需的最后一個令牌。

Input: /storage/emulated/0/Pictures/HelloCamera/VID_20150806_131011.mp4
Output: VID_20150806_131011.png

Answer 2

我最終將fileName傳遞給getVideoThumb，謝謝@fhissen使我知道重復的路徑...代碼現在看起來像這樣...

 private File getVideoThumb(String mediaPath, String mediaName, Uri videoUri) {
        Bitmap bmThumbnail;

//MINI 512x334
        bmThumbnail = ThumbnailUtils.createVideoThumbnail(mediaPath, MediaStore.Video.Thumbnails.MINI_KIND);

        File fPath = Environment.getExternalStorageDirectory();


        String[] tokens = mediaName.split("\\.(?=[^\\.]+$)");
        File f = null;

        f = new File(fPath, tokens[0] +".png");
        FileOutputStream out = null;
        try {


            out = new FileOutputStream(f);
            bmThumbnail.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance
            // PNG is a lossless format, the compression factor (100) is ignored
        } catch (Exception e) {
            Log.d(Constants.DEBUG, "ERROR saving the compressed bitmap " + e);
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.flush();
                    out.close();
                }
            } catch (IOException e) {

                Log.d(Constants.DEBUG, "ERROR closing out stream for file for bitmap");
                e.printStackTrace();
            }
        }

        return f;
    }