[英]Create File from Uri type android
I'm trying to select image from gallery then convert this image to File and send it via HttpPost but I'm getting always FileNotFoundException
. 我正在尝试从库中选择图像然后将此图像转换为文件并通过HttpPost发送它,但我总是得到
FileNotFoundException
。 This my Code : 我的代码:
Selecting the photo 选择照片
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1) {
// currImageURI is the global variable I’m using to hold the content:
currImageURI = data.getData();
//Save the currImageUri (URI type) to global variable.
photosHolder.getInstance().setOneIm(currImageURI);
}
}
}
Converting the photo 转换照片
// First Try
File myFile = new File((photosHolder.getInstance().getOneIm()).toString());
params.put("visit_report[photos_attributes][0][file]",myFile); **The exception Raised here
// second try
File myFile2 = new File((photosHolder.getInstance().getOneIm()).getPath());
params.put("visit_report[photos_attributes][1][file]",myFile2); ** Also here
And those are myFiles Value while debuging : 在调试时,这些是myFiles Value:
mFile : content:/com.android.providers.media.documents/document/image%3A19143
myFile2 : /document/image:19143
So any help ? 那有什么帮助吗?
Update I have tried this solution also : 更新我也试过这个解决方案:
//get The real path from uri then save it (and then use it to create the file)
photosHolder.getInstance().setUriString(getRealPathFromURI(currImageURI));
//Convert the image URI to the direct file system path of the image file
private String getRealPathFromURI(Uri contentURI) {
String result = "";
try {
Cursor cursor = getActivity().getContentResolver().query(contentURI, null, null, null, null);
if (cursor == null) { // Source is Dropbox or other similar local file path
result = contentURI.getPath();
} else {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
result = cursor.getString(idx); // Exception raised HERE
cursor.close(); }
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
But I got java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it
但是我得到了
java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it
java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it
and the idx
var == to -1
java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it
和idx
var ==到-1
java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it
Also I have tried @Praneeth Kalluri Solution but it returns always null as result. 我也试过@Praneeth Kalluri解决方案,但结果总是返回null。
Uri currImageURI = data.getData();
printing currImageURI will give you some thing like this: 打印currImageURI会给你一些这样的事情:
content://media/external/images/media/47
But what we need is the absolute path of that particular image . 但我们需要的是特定图像的绝对路径。 So we need to get real path from uri
所以我们需要从uri获得真正的路径
public String getRealPathFromURI(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.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();
}
}
}
Now modifiy your code like 现在修改你的代码就像
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1) {
// currImageURI is the global variable I’m using to hold the content:
currImageURI = data.getData();
//Save the currImageUri (URI type) to global variable.
photosHolder.getInstance().setOneIm(getRealPathFromURI(getActivity(),currImageURI));
}
}
}
public String getRealPathFromURI(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.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();
}
}
}
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