Let's take a look at the form of uri before 4.4: Uri: content://media/extenral/images/media/17766
Is it familiar? Look at the Uri form in 4.4 and later:
content://com.android.providers.media.documents/document/image%2706
As soon as the log is printed, I understand why. This thing is different before and after Android 4.4. Before 4.4, content was followed by the full path of the file. After 4.4, the path is no longer directly represented. This is easy to handle. After looking through the API, I found that the Uri after 4.4 is not unique, and it is not a unified format, so here is a general solution:
Insert one
The following is the solution after 4.2.2, after the managedQuery method was deprecated before 4.4:
public String getRealPathFromURI(Uri contentUri) {
String res = null;
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(contentUri, proj, null, null, null);
if(cursor.moveToFirst()){;
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
res = cursor.getString(column_index);
}
cursor.close();
return res;
}
Before 4.4, the path was obtained through Uri: data is Uri, and filename is a String string used to save the path.
public static String getPathByUri(Context context, Uri data) {
String filename=null;
if (data.getScheme().toString().compareTo("content") == 0) {
Cursor cursor = context.getContentResolver().query(data, new String[] { "_data" }, null, null, null);
if (cursor.moveToFirst()) {
filename = cursor.getString(0);
}
} else if (data.getScheme().toString().compareTo("file") == 0) {// file:///开头的uri
filename = data.toString();
filename = data.toString().replace("file://", "");// 替换file://
if (!filename.startsWith("/mnt")) {// 加上"/mnt"头
filename += "/mnt";
}
}
return filename;
}
After 4.4, get the path according to Uri:
// It is specially designed for Android4.4 to get the absolute path of the file from Uri, the previous method is no longer easy to use
@SuppressLint("NewApi")
public static String getPathByUri4kitkat(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
if (isExternalStorageDocument(uri)) {// ExternalStorageProvider
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 (isDownloadsDocument(uri)) {// DownloadsProvider
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(uri)) {// MediaProvider
final String docId = DocumentsContract.getDocumentId(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);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore
// (and
// general)
return getDataColumn(context, uri, null, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context
* The context.
* @param uri
* The Uri to query.
* @param selection
* (Optional) Filter used in the query.
* @param selectionArgs
* (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = { column };
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument {Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
Android 2.3.3 & 4.0.4 & 4.4 & 5.1.1 & 6.0 The real machine test is normal, welcome to copy!
Finally, attach the relevant functions used in a Video project for reference:
//return the id of URI
public static int getVideoUriByPath(Uri resultUri, Activity activity, String path){
resultUri= null;
int id=-1;
if(activity==null || path==null)
return id;
Uri preUri = Uri.parse("content://media/external/video/media/");
@SuppressWarnings("deprecation")
Cursor cursor = activity.managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Video.Media.DEFAULT_SORT_ORDER);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
String data = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
if (path.equals(data)) {
id = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID));
resultUri = Uri.withAppendedPath(preUri, "" + id);
break;
}
cursor.moveToNext();
}
return id;
}