从sdcard棉花糖中的文件的URI获取真实路径
我想选择sdcard 不在内部存储中的文件，然后将其上传到服务器，但是我无法获取其大小的路径.我已经开始使用以下代码来选择文件:
I want to pick file that exist in sdcard not in internal storage and upload it server but I am not able to get its path for getting its size. I have start an intent for pick a file using below code:
intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
String[] mimetypes = {"application/*"};
intent.putExtra(Intent.EXTRA_MIME_TYPES, mimetypes);
startActivityForResult(
Intent.createChooser(intent, "Select a File to Upload"), FILE_SELECT_CODE);
For getting path to file I am using this answer and its working unless user select any file from sdcard(removable). When I debug the code and found that type is not primary so it will not go inside this condition :
if("primary".equalsIgnoreCase(type)){
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
所以我的问题是呢?即如果类型不是主要的怎么办?在这种情况下，我们如何获取文件的路径?我搜索了很多问题，并且教程中没有其他问题.我还尝试了此答案的其他部分，但它不起作用，因为System.getenv()为" SECONDARY_STORAGE "返回 null ，为" EXTERNAL_STORAGE "返回 sdcard ".尝试时出现文件找不到异常
So my question is what will be it's else? i.e. what if type is not primary? how we can get path to file in that case? I have search many questions and tutorial there is no else in any of them. I have also tried else part of this answer but its not working because System.getenv() return null for "SECONDARY_STORAGE" and sdcard for "EXTERNAL_STORAGE". I get file not found exception when I try:
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}else{
return System.getenv("EXTERNAL_STORAGE") + "/" + split[1];
}
文件的Uri和doc ID如下:
Uri and doc Id for file look like:
Uri :content://com.android.externalstorage.documents/document/0EF9-3110%3Adevice-2016-12-02-130553.png
Uri: content://com.android.externalstorage.documents/document/0EF9-3110%3Adevice-2016-12-02-130553.png
docId :0EF9-3110:device-2016-12-02-130553.png
docId: 0EF9-3110:device-2016-12-02-130553.png
有帮助吗?
在Android设备管理器上花了一些时间后，我找到了解决方案，这里是:
After spending time on Android Device Manager I have found solution, here it is:
如果文档类型ID不是主要的，那么我将使用以下路径创建路径:
If doc type id is not primary then I create path using :
filePath = "/storage/" + type + "/" + split[1];
编辑:对于DocumentUri，请根据文件类型选择contentUri
in case of DocumentUri select contentUri on basis of file type
以下是完整的功能:
public static String getRealPathFromURI_API19(Context context, Uri uri) {
String filePath = "";
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
} else {
if (Build.VERSION.SDK_INT > 20) {
//getExternalMediaDirs() added in API 21
File extenal[] = context.getExternalMediaDirs();
if (extenal.length > 1) {
filePath = extenal[1].getAbsolutePath();
filePath = filePath.substring(0, filePath.indexOf("Android")) + split[1];
}
}else{
filePath = "/storage/" + type + "/" + split[1];
}
return filePath;
}
} else if (isDownloadsDocument(uri)) {
// DownloadsProvider
final String id = DocumentsContract.getDocumentId(uri);
//final Uri contentUri = ContentUris.withAppendedId(
// Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
Cursor cursor = null;
final String column = "_data";
final String[] projection = {column};
try {
cursor = context.getContentResolver().query(uri, projection, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
String result = cursor.getString(index);
cursor.close();
return result;
}
} finally {
if (cursor != null)
cursor.close();
}
} else if (DocumentsContract.isDocumentUri(context, uri)) {
// MediaProvider
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String[] ids = wholeID.split(":");
String id;
String type;
if (ids.length > 1) {
id = ids[1];
type = ids[0];
} else {
id = ids[0];
type = ids[0];
}
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{id};
final String column = "_data";
final String[] projection = {column};
Cursor cursor = context.getContentResolver().query(contentUri,
projection, selection, selectionArgs, null);
if (cursor != null) {
int columnIndex = cursor.getColumnIndex(column);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
}
return filePath;
} else {
String[] proj = {MediaStore.Audio.Media.DATA};
Cursor cursor = context.getContentResolver().query(uri, proj, null, null, null);
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
if (cursor.moveToFirst())
filePath = cursor.getString(column_index);
cursor.close();
}
return filePath;
}
return null;
}