import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class PickUtils {
public static final String DOCUMENTS_DIR = "documents";
@SuppressLint("NewApi")
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
/
/ ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
ExternalStorageDirectory() + "/" + split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentId(uri);
if (id != null && id.startsWith("raw:")) {
return id.substring(4);
}
String[] contentUriPrefixesToTry = new String[]{
"content://downloads/public_downloads",
"content://downloads/my_downloads"
};
for (String contentUriPrefix : contentUriPrefixesToTry) {
try {
// note: id 可能为字符串，如在华为10.0系统上，选择⽂件后id为："msf:254"，导致转Long异常
Uri contentUri = ContentUris.withAppendedId(Uri.parse(contentUriPrefix), Long.parseLong(id));
String path = getDataColumn(context, contentUri, null, null);
if (path != null && !path.equals("")) {
return path;
}
} catch (Exception e) {
}
}
// path could not be retrieved using ContentResolver, therefore copy file to accessible cache using streams                String fileName = getFileName(context, uri);
File cacheDir = getDocumentCacheDir(context);
File file = generateFileName(fileName, cacheDir);
String destinationPath = null;
if (file != null) {
destinationPath = AbsolutePath();
saveFileFromUri(context, uri, destinationPath);
}
return destinationPath;
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentId(uri);
final String[] split = docId.split(":");
final String type = split[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[]{split[1]};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".Scheme())) {
String path = getDataColumn(context, uri, null, null);
if (path != null && !path.equals("")) return path;
// path could not be retrieved using ContentResolver, therefore copy file to accessible cache using streams            String fileName = getFileName(context, uri);
File cacheDir = getDocumentCacheDir(context);
File file = generateFileName(fileName, cacheDir);
String destinationPath = null;
if (file != null) {
destinationPath = AbsolutePath();
saveFileFromUri(context, uri, destinationPath);
}
return destinationPath;
}
// File
else if ("file".Scheme())) {
Path();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "alstorage.documents".Authority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {安卓intent用法
return "com.android.providers.downloads.documents".Authority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.dia.documents".Authority());
}
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {column};
String path = "";
try {
cursor = ContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && veToFirst()) {
final int column_index = ColumnIndexOrThrow(column);
path = String(column_index);
return path;
}
} catch (Exception e) {
} catch (Exception e) {
e.printStackTrace();
} finally {
if (cursor != null)
cursor.close();
}
return path;
}
public static String getFileName(@NonNull Context context, Uri uri) {
String mimeType = ContentResolver().getType(uri);
String filename = null;
if (mimeType == null && context != null) {
String path = getPath(context, uri);
if (path == null) {
filename = String());
} else {
File file = new File(path);
filename = Name();
}
} else {
Cursor returnCursor = ContentResolver().query(uri, null,
null, null, null);
if (returnCursor != null) {
int nameIndex = ColumnIndex(OpenableColumns.DISPLAY_NAME);                veToFirst();
filename = String(nameIndex);
returnCursor.close();
}
}
String[] filename_s = filename.split("\\.",2);
return filename_s[0];
}
public static String getName(String filename) {
if (filename == null) {
return null;
}
int index = filename.lastIndexOf('/');
return filename.substring(index + 1);
}
public static File getDocumentCacheDir(@NonNull Context context) {
Log.d("PickUtils", "getDocumentCacheDir");
File dir = new CacheDir(), DOCUMENTS_DIR);
if (!ists()) {
dir.mkdirs();
}
return dir;
}
@Nullable
public static File generateFileName(@Nullable String name, File directory) {
if (name == null) {
return null;
}
File file = new File(directory, name);
if (ists()) {
String fileName = name;
String extension = "";
int dotIndex = name.lastIndexOf('.');
if (dotIndex > 0) {
fileName = name.substring(0, dotIndex);
extension = name.substring(dotIndex);
}
int index = 0;
while (ists()) {
index++;

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