Android 代码不创建文件。找不到这样的文件或目录错误

Question

我有以下代码可以将捕获的图像写入 SD 卡

private static File getOutputMediaFile(){
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES), "AppName");

    if (!mediaStorageDir.exists()){
        if (!mediaStorageDir.mkdirs()){
            return null;
        }
    }

    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    return new File(mediaStorageDir.getPath() + File.separator +
            "IMG_"+ timeStamp + ".jpg");
}

使用方法如下:

public void takePicture(){
    i= new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //Open camera
    file = Uri.fromFile(getOutputMediaFile());
    i.putExtra(MediaStore.EXTRA_OUTPUT, file);
    startActivityForResult(i, 100);
}

捕获图像后，将文件路径发送到以下函数:

public void sendForUpload(String uploadUrl, String path){
    File dir = Environment.getExternalStorageDirectory();
    File imgFile = new File(dir, path);
    sendFile(uploadUrl, imgFile);
}
public void sendFile(String uploadUrl, File file){
    Log.d(GlobalClass.TAG, "File has arrived here");
    Log.d(GlobalClass.TAG, file.toString());
    byte[] fileData1 = new byte[(int) file.length()];
    FileInputStream fileInputStream;
    try{
        fileInputStream = new FileInputStream(file);
        fileInputStream.read(fileData1);
        fileInputStream.close();
    }catch (Exception e){
        Log.d("Error", e.getMessage());
    }
    .... // Upload
}

此处的 try block 失败，日志显示错误:

D/Error: /storage/emulated/0/storage/emulated/0/Pictures/AppName/IMG_20160516_120506.jpg: open failed: ENOENT (No such file or directory)

如何将文件读入sendFile()？

Answer 1

仔细查看错误中的路径:

/storage/emulated/0/storage/emulated/0/Pictures/AppName/IMG_20160516_120506.jpg

您会注意到 /storage/emulated/0 重复了。

替换:

File dir = Environment.getExternalStorageDirectory();
File imgFile = new File(dir, path);

与:

File imgFile = new File(path);