android - 从 Uri 创建文件

Question

我正在尝试将图像上传到 php，为此我需要将文件发送到服务器。所以我尝试从数据参数创建一个文件。

但我收到此错误无法解析构造函数文件

这是我的代码:

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
            // Get the url from data
            Uri selectedImageUri = data.getData();
            if (null != selectedImageUri) {
                // File
                File imageFilePath = new File(selectedImageUri);

Answer 1

正确的方法是getContentResolver().openInputStream(uri_of_your_file);并使用 FileOutputStream 到您所需的路径，然后使用该文件。

自Commonsware answer起

You can use ContentResolver and openInputStream() to get an InputStream on the content represented by the Uri. You can create a FileOutputStream on some file that you control. And, you can use Java I/O to copy from the InputStream to the OutputStream, making your own copy of the content in a file that you control.

执行此操作的示例代码，

InputStream in =  getContentResolver().openInputStream("your_uri_here");
OutputStream out = new FileOutputStream(new File("your_file_here"));
        byte[] buf = new byte[1024];
        int len;
        while((len=in.read(buf))>0){
            out.write(buf,0,len);
        }
        out.close();
        in.close();