Android：打開失敗：ENOENT（無此類文件或目錄）錯誤

Question

我正在按照本教程拍照，保存，縮放並在android中使用。 但是我正在獲取Android: open failed: ENOENT (No such file or directory)嘗試打開/檢索保存的圖像時出現Android: open failed: ENOENT (No such file or directory)錯誤。 經過一番研究，我發現這篇文章假定該問題與文件中包含數字名稱的文件有關，例如我的文件帶有當前時間戳的名稱。 我檢查了圖像是否保存在文件目錄中，並登錄以確保用於檢索圖像的文件名與原始名稱匹配。 這是我的代碼中出現錯誤的部分：

private void setPic(ImageView myImageView) {
    // Get the dimensions of the View
    int targetW = myImageView.getWidth();
    int targetH = myImageView.getHeight();

    // Get the dimensions of the bitmap
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;
    Log.v("IMG Size", "IMG Size= "+String.valueOf(photoW)+" X "+String.valueOf(photoH));

    // Determine how much to scale down the image
    int scaleFactor = Math.min(photoW/targetW, photoH/targetH);

    // Decode the image file into a Bitmap sized to fill the View
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
    myImageView.setImageBitmap(bitmap);
}

這是日志顯示的內容：

E/BitmapFactory﹕ Unable to decode stream: java.io.FileNotFoundException: /file:/storage/sdcard0/Pictures/JPEG_20150728_105000_1351557687.jpg: open failed: ENOENT (No such file or directory)

我正在嘗試打開名為JPEG_20150728_105000_1351557687.jpg的圖像

Answer 1

我下載了您的代碼，並嘗試在我的應用程序中使用它們。 發現前綴/file:導致FileNotFoundException 。

將您的方法替換為以下方法。

    private void setPic(ImageView myImageView) {
    // Get the dimensions of the View
    int targetW = myImageView.getWidth();
    int targetH = myImageView.getHeight();

    String path = mCurrentPhotoPath.replace("/file:","");

    // Get the dimensions of the bitmap
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(path, bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;
    Log.v("IMG Size", "IMG Size= " + String.valueOf(photoW) + " X " + String.valueOf(photoH));

    // Determine how much to scale down the image
    int scaleFactor = Math.min(photoW/targetW, photoH/targetH);

    // Decode the image file into a Bitmap sized to fill the View
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    Bitmap bitmap = BitmapFactory.decodeFile(path, bmOptions);
    myImageView.setImageBitmap(bitmap);
}