Question

我需要Android设备上图片的File对象。

我使用函数来获取给定URI的FileInputStream。

FileInputStream getSourceStream(Uri u) throws FileNotFoundException {
    FileInputStream out = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        ParcelFileDescriptor parcelFileDescriptor =
                getContentResolver().openFileDescriptor(u, "r");
        FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
        out = new FileInputStream(fileDescriptor);
    } else {
        out = (FileInputStream) getContentResolver().openInputStream(u);
    }
    return out;
}

返回FileInputStream。我需要的是图像的File对象。如何从FileInputStream获取文件？

更新

这就是我获取URI的方式：

    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, ""), PICK_IMAGE);

并在onActivityResult上获取图片的URI。

@Override
protected void onActivityResult(int requestCode, int resultCode,
                                 Intent data) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    if(resultCode == RESULT_OK){
        String uri = data.getData();
    }
}

Answer 1

您可以使用以下代码将FileInputStream转换为File对象。

try {

        File outputFile = new File("YOUR DESIRED FILE PATH");


        FileOutputStream fos = new FileOutputStream(outputFile);
        int c;

        while ((c = fileInputStream.read()) != -1) {
           fos.write(c);
        }

        fileInputStream.close();
        fos.close();
    } catch (FileNotFoundException e) {
        System.err.println("FileStreamsTest: " + e);
    } catch (IOException e) {
        System.err.println("FileStreamsTest: " + e);
    }

这里＆＃39; fileInputStream＆＃39;是getSourceStream（）返回的对象

从FileInputStream获取File对象

1 个答案: