HB. :
I'm using this fileutils class when selecting a file from the device:
public class FileUtils {
private FileUtils() {
}
private static final String TAG = "FileUtils";
private static final boolean DEBUG = false;
private static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
private static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
private static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
private static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
private 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()) {
if (DEBUG)
DatabaseUtils.dumpCursor(cursor);
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public static String getPath(final Context context, final Uri uri) {
if (DEBUG)
Log.d(TAG + " File -",
"Authority: " + uri.getAuthority() +
", Fragment: " + uri.getFragment() +
", Port: " + uri.getPort() +
", Query: " + uri.getQuery() +
", Scheme: " + uri.getScheme() +
", Host: " + uri.getHost() +
", Segments: " + uri.getPathSegments().toString()
);
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 = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
// This is for checking Main Memory
if ("primary".equalsIgnoreCase(type)) {
if (split.length > 1) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
} else {
return Environment.getExternalStorageDirectory() + "/";
}
// This is for checking SD Card
} else {
return "storage" + "/" + docId.replace(":", "/");
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
if (id.startsWith("raw:")) {
String[] data = new String[2];
data[0] = id.replaceFirst("raw:", "");
data[1] = null;
return data[0];
}
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
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);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
I call this class in onActivityResult like this:
String sourcePath = FileUtils.getPath(this, data.getData());
For some reason I'm getting the following crash:
Caused by java.lang.IllegalArgumentException: Unknown URI: content://downloads/public_downloads/230
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:165)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:418)
at android.content.ContentResolver.query(ContentResolver.java:760)
at android.content.ContentResolver.query(ContentResolver.java:710)
at android.content.ContentResolver.query(ContentResolver.java:668)
at com.HBiSoft.ProGolf.Utils.FileUtils.getDataColumn(FileUtils.java:50)
at com.HBiSoft.ProGolf.Utils.FileUtils.getPath(FileUtils.java:116)
at com.HBiSoft.ProGolf.MainActivity.onActivityResult(MainActivity.java:652)
at android.app.Activity.dispatchActivityResult(Activity.java:7638)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4515)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4563)
at android.app.ActivityThread.-wrap21(Unknown Source)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1779)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:7000)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
the crash only happens when selecting a file from the downloads folder.
Can someone please help me resolve this?
HB. :
I have created a gist that solves this issue, here is the link.
IMPORTANT!!
When you select a file from Google Drive or Dropbox then you will get the following error:
Caused by java.lang.IllegalArgumentException: column '_data' does not exist
To resolve this you actually have to make a temporary copy of the file you are trying select.
First you have to check if the content:// uri is from Google Drive, you can do this by doing the following:
public boolean isGoogleDrive(Uri uri) {
return String.valueOf(uri).toLowerCase().contains("com.google.android.apps");
}
This will return true if it is a file from Google Drive. If it is, I will call a AsyncTask, as shown below:
//The data.getData() below refers to the uri you get in onActivityResult
if (isGoogleDrive(data.getData())) {
DownloadAsyncTask asyntask = new DownloadAsyncTask(data.getData(), this);
asyntask.execute();
asyntask.callback = this;
}
In the AsyncTask we will use the Uri to open a InputStream and get the byte data back which we will use to make a copy of the file.
Here is the AsyncTask class (I've added comments to make it more understandable):
class DownloadAsyncTask extends AsyncTask<Uri, Void, String> {
private Uri mUri;
CallBackTask callback;
Context mContext;
private AlertDialog mdialog;
DownloadAsyncTask(Uri uri, Context context) {
this.mUri = uri;
mContext = context;
}
// In the onPreExecute() I'm displaying a custom dialog, this is not necessary, but recommended for when the user selects a large file
@Override
protected void onPreExecute() {
final AlertDialog.Builder mPro = new AlertDialog.Builder(new ContextThemeWrapper(mContext, R.style.myDialog));
@SuppressLint("InflateParams")
//Get reference to dialog layout
final View mPView = LayoutInflater.from(mContext).inflate(R.layout.dialog, null);
//Get reference to dialog title
final TextView title = mPView.findViewById(R.id.txtTitle);
//Get reference to dialog description
final TextView desc = mPView.findViewById(R.id.txtDesc);
//Set title text
title.setText("Please wait..");
//Set description text
desc.setText("Drive files needs to be imported, this might take some time depending on the file size.");
mPro.setView(mPView);
mdialog = mPro.create();
mdialog.show();
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected String doInBackground(Uri... params) {
//This will be the file we will use (the one that will be copied)
File file = null;
try {
//Create a temporary folder where the copy will be saved to
File temp_folder = mContext.getExternalFilesDir("TempFolder");
//Use ContentResolver to get the name of the original name
//Create a cursor and pass the Uri to it
Cursor cursor = mContext.getContentResolver().query(mUri, null, null, null, null);
//Check that the cursor is not null
assert cursor != null;
int nameIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
cursor.moveToFirst();
//Get the file name
String filename = cursor.getString(nameIndex);
//Close the cursor
cursor.close();
//open a InputStream by passing it the Uri
//We have to do this in a try/catch
InputStream is = null;
try {
is = mContext.getContentResolver().openInputStream(mUri);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//We now have a folder and a file name, now we can create a file
file = new File(temp_folder + "/" + filename);
//We can now use a BufferedInputStream to pass the InputStream we opened above to it
BufferedInputStream bis = new BufferedInputStream(is);
//We will write the byte data to the FileOutputStream, but we first have to create it
FileOutputStream fos = new FileOutputStream(file);
byte data[] = new byte[1024];
long total = 0;
int count;
//Below we will read all the byte data and write it to the FileOutputStream
while ((count = bis.read(data)) != -1) {
total += count;
fos.write(data, 0, count);
}
//The FileOutputStream is done and the file is created and we can clean and close it
fos.flush();
fos.close();
} catch (IOException e) {
Log.e("IOException = ", String.valueOf(e));
}
//Finally we can pass the path of the file we have copied
return file.getAbsolutePath();
}
protected void onPostExecute(String result) {
//We are done and can cancel the dialog
if (mdialog != null && mdialog.isShowing()) {
mdialog.cancel();
}
//I'm using a callback to let my Activity know that the AsyncTask is done. I pass the path along.
callback.getResultFromAsynTask(result);
}
}
You will see that in the onPostExecute() above I have callback.getResultFromAsynTask(result);. As I mentioned in the comment, I'm using a callback method to let the Activity know that I'm done and I pass the path to the callback.
In you Activity you have to implement the callback, like this:
public class MainActivity extends AppCompatActivity implements CallBackTask {
and the CallBackTask will look like this:
interface CallBackTask {
void getResultFromAsynTask(String result);
}
now you have to implement it in your Activity to get the result in your Activity:
@Override
public void getResultFromAsynTask(String result) {
// Do what you need with the result like starting your new Activity and passing the path
final Intent intent = new Intent();
intent.setClass(MainActivity.this, Player.class);
intent.putExtra("path", result);
startActivity(intent);
}
GREAT, you now have a Uri from a File://(instead of content://) that you have temporarily copied. But, don't forget to delete the file when you are done with it, otherwise your application size will keep growing bigger.
Below, I will delete the TempFolder we created earlier, I will be doing this in the Activities onBackPressed (this should be done in onDestroy() as well):
@Override
public void onBackPressed() {
super.onBackPressed();
File dir = getBaseContext().getExternalFilesDir("TempFolder");
deleteRecursive(dir);
}
void deleteRecursive(File fileOrDirectory) {
if (fileOrDirectory.isDirectory())
for (File child : fileOrDirectory.listFiles())
deleteRecursive(child);
fileOrDirectory.delete();
}
This is a lot read BUT... By doing it this way, you will NEVER have issues with any content:// Uri's.