如何找到android镜像的路径并从Uri创建文件

Question

我在将Uri路径转换为URI(创建文件)时遇到问题。

我的代码是：

private void uploadImageToServer(Uri path){
    String[] filePathColumn = {MediaStore.Images.Media.DATA};

    android.database.Cursor cursor = getContentResolver().query(path, filePathColumn, null, null, null);
    if (cursor == null)
        return;

    cursor.moveToFirst();

    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String filePath = cursor.getString(columnIndex);
    cursor.close();

    File file = new File(filePath);
}

然而，我的游标是空的。

我在函数中的"Uri路径“参数是：file:///storage/emulated/0/Pictures/MyApp/IMG_20170411_170952.jpg

我遵循的是这个教程：https://medium.com/@adinugroho/upload-image-from-android-app-using-retrofit-2-ae6f922b184c

Answer 1

试一试，我强烈建议不要使用

content:// 

只需将其用作

content:

String imagePath = "";
Uri targetUri = data.getData();
        if (data.toString().contains("content:")) {
            imagePath = getRealPathFromURI(targetUri);
        } else if (data.toString().contains("file:")) {
            imagePath = targetUri.getPath();
        } else {
            imagePath = null;
        }


 public String getRealPathFromURI(Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = {MediaStore.Images.Media.DATA};
        cursor = getContentResolver().query(contentUri, proj, null, null,
                null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

Answer 2

My "Uri path" parameter from function is: 
file:///storage/emulated/0/Pictures/MyApp/IMG_20170411_170952.jpg

那么你想要的路径是

/storage/emulated/0/Pictures/MyApp/IMG_20170411_170952.jpg

代码

private void uploadImageToServer(Uri uri){
   String filePath = uri.toString().replace("file://", "" );

   File file = new File(filePath);
}

也许您甚至可以直接使用uri.getPath()。请查收。