Get GPS data from file metadata in Android 10 - java

So, I have to get GPS data from file MetaData. "No problem", I said, "This will only take an hour or two". Six hour later, here I am searching through all Android Documentation and Stack exchange questions I can yet I still cant get it to work.
My Code is straight forward:
I am using a ACTION_PICK to select a video (ACTION_OPEN_DOCUMENT Doesn't work either).
I Have already requested the following permissions and added to the Manifest:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_MEDIA_LOCATION" />
Below is code from the button listener
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK , MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
//intent.setType("video/*");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
startActivityForResult(Intent.createChooser(intent,"Select A Video"),REQUEST_VIDEO_CONTENT);
}
});
And From the OnActivityResult:
protected void onActivityResult(int requestCode, int resultCode, Intent vIntent) {
super.onActivityResult(requestCode, resultCode, vIntent);
if ((requestCode == REQUEST_VIDEO_CAPTURE || requestCode == REQUEST_VIDEO_CONTENT) && resultCode == RESULT_OK) {
//Attempt to get Content Data
vIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
vIntent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
Uri vUri = vIntent.getData();
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
vUri = MediaStore.setRequireOriginal(vUri);
}
try {
InputStream vIS = getContentResolver().openInputStream(vUri);
ExifInterface vExif = new ExifInterface(vIS);
} catch (SecurityException | IOException e) {
e.printStackTrace();
}
And finally, the lovely SecurityException:
W/System.err: java.lang.SecurityException: Permission Denial: reading com.google.android.apps.photos.contentprovider.impl.MediaContentProvider uri content://com.google.android.apps.photos.contentprovider/0/2/content%3A%2F%2Fmedia%2Fexternal%2Fvideo%2Fmedia%2F198668/ORIGINAL/NONE/video%2Fmp4/328149382?requireOriginal=1 from pid=6190, uid=10146 requires the provider be exported, or grantUriPermission()
W/System.err: at android.os.Parcel.createException(Parcel.java:2071)
at android.os.Parcel.readException(Parcel.java:2039)
W/System.err: at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:188)
at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:151)
W/System.err: at android.content.ContentProviderProxy.openTypedAssetFile(ContentProviderNative.java:705)
at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1710)
W/System.err: at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1526)
W/System.err: at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:1345)
at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:1293)
W/System.err: at com.equinox.openeyes.VideoSubmission.onActivityResult(VideoSubmission.java:117)
at android.app.Activity.dispatchActivityResult(Activity.java:8147)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4883)
W/System.err: at android.app.ActivityThread.handleSendResult(ActivityThread.java:4931)
at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51)
W/System.err: at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2022)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:235)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7441)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
I get that the Error is saying the provider needs to be exported, or grantUriPermission which sounds like an easy fix, except I cannot find a way to implement what they ask. All the places I have looked have suggested adding flags.. as you can see it didnt work.
Please Help :-(

Related

App crashes when calling dispatchTakePictureIntent

My app is crashing when I click on the following button to use dispatchTakePictureIntent
My code:
ic_img_item.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dispatchTakePictureIntent(PHOTO);
}
});
private void dispatchTakePictureIntent(int requestCode) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(activity.getPackageManager()) != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, PHOTO_TEMP);
takePictureIntent.putExtra("return-data", true);
startActivityForResult(takePictureIntent, requestCode);
}
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
try {
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inSampleSize = 2;
Bitmap bitmap = RotateBitmap(BitmapFactory.decodeStream(activity.getContentResolver().openInputStream(PHOTO_TEMP), null, bmOptions), getPictureOrientation(PHOTO_TEMP));
thumb = getThumbnail(bitmap);
setThumbnail(bitmap);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
Log:
--------- beginning of crash
2020-09-10 17:41:31.769 25093-25093/ubisolutions.net.datacenterinventory.debug E/AndroidRuntime: FATAL EXCEPTION: main
Process: ubisolutions.net.datacenterinventory.debug, PID: 25093
java.lang.RuntimeException: android.os.TransactionTooLargeException: data parcel size 3087012 bytes
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3782)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: android.os.TransactionTooLargeException: data parcel size 3087012 bytes
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:615)
at android.app.ActivityManagerProxy.activityStopped(ActivityManagerNative.java:3653)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3774)
at android.os.Handler.handleCallback(Handler.java:751) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6123) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779) 
2020-09-10 17:41:31.775 1239-1239/? E/NotificationService: Suppressing notification from package by user request.
2020-09-10 17:41:31.775 1239-25274/? I/QCALOG: [MessageQ_Client] connecting to server [/data/misc/location/mq/location-mq-s]
2020-09-10 17:41:31.776 1239-25274/? E/QCALOG: [MessageQ_Client] connect error: 111, [Connection refused]
I have seen some responses about similar issues but none of them helped me to solve it.
thanks.
Your code line
takePictureIntent.putExtra("return-data", true);
requests, that the picture data is returned directly, but it is too large to be passed back in the result. You should instead get it from PHOTO_TMP you are passing in the intent too.
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, PHOTO_TEMP)

Error Code 12500 when trying to implement google sign in for android

So I've been getting error 12500 for 3 days now and I've looked at every possible post to try and resolve the error. I've updated google play services, updated the google console to make sure there are supporting links and added a profile image. IM NOT USING FIREBASE. I'm just using google console. The error seems to be happening when I create the GoogleSignInAccount account.
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleSignInResult(task);
}
}
private void handleSignInResult(#NonNull Task<GoogleSignInAccount> completedTask) {
try {
GoogleSignInAccount account = completedTask.getResult(ApiException.class);
String idToken = account.getIdToken();
System.out.println(idToken);
updateUI(account);
} catch (Exception e) {
e.printStackTrace();
updateUI(null);
}
}
W/System.err: com.google.android.gms.common.api.ApiException: 12500:
at com.google.android.gms.common.internal.ApiExceptionUtil.fromStatus(Unknown Source:4)
at com.google.android.gms.auth.api.signin.GoogleSignIn.getSignedInAccountFromIntent(Unknown Source:8)
at edu.lehigh.cse216.phase0.ui.login.LoginActivity.onActivityResult(LoginActivity.java:90)
at android.app.Activity.dispatchActivityResult(Activity.java:7454)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4353)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4402)
at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
W/System.err: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Please follow Google Sign In error 12500 and second one please read latest docs of google sign in method.

Storage Access Framework - failing to obtain document tree from uri (returned from Drive app)

My Android app wants to create a folder in Google Drive and get the uri from the Drive app on the device.
It sends an intent, you can see the code below:
private void createFolder(String folderName) {
Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
// Create a file with the requested MIME type.
intent.setType("vnd.android.document/directory");
intent.putExtra(Intent.EXTRA_TITLE, folderName);
startActivityForResult(intent, WRITE_REQUEST_CODE);
}
then it gets the returned data, you can see the code below:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent resultData)
{
if (requestCode == WRITE_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
Uri uri = null;
if (resultData != null) {
uri = resultData.getData();
Log.i("result", "Uri: " + uri.toString());
DocumentFile pickedDir = DocumentFile.fromTreeUri(this, uri); //this line gives the error
}
}
}
I used a mimetype found on the internet that seems to be a standard type. The same error is issued when using "application/vnd.google-apps.folder".
The goal is to have a document tree but in logcat I get the following error:
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=43, result=-1, data=Intent { dat=content://com.google.android.apps.docs.storage/document/acc=1;doc=encoded=LongStringWithRandomCharactersHere/j flg=0x43 }} to activity {com.example.myapplication/com.example.myapplication.MainActivity}: java.lang.IllegalArgumentException: Invalid URI: content://com.google.android.apps.docs.storage/document/acc%3D1%3Bdoc%3Dencoded%3DSameLongStringWithRandomCharactersHere%2Fj
and below
Caused by: java.lang.IllegalArgumentException: Invalid URI: content://com.google.android.apps.docs.storage/document/acc%3D1%3Bdoc%3Dencoded%3DAnotherLongStringWithDifferentRandomDataHere
Here's the complete stack trace:
2019-05-31 15:06:50.167 31184-31184/com.example.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication, PID: 31184
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=43, result=-1, data=Intent { dat=content://com.google.android.apps.docs.storage/document/acc=1;doc=encoded=randomcharacters flg=0x43 }} to activity {com.example.myapplication/com.example.myapplication.MainActivity}: java.lang.IllegalArgumentException: Invalid URI: content://com.google.android.apps.docs.storage/document/acc%3D1%3Bdoc%3Dencoded%3Drandomcharacters
at android.app.ActivityThread.deliverResults(ActivityThread.java:4365)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4409)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1670)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6687)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810)
Caused by: java.lang.IllegalArgumentException: Invalid URI: content://com.google.android.apps.docs.storage/document/acc%3D1%3Bdoc%3Dencoded%3Drandomcharacters
at android.provider.DocumentsContract.getTreeDocumentId(DocumentsContract.java:1023)
at android.support.v4.provider.DocumentFile.fromTreeUri(DocumentFile.java:138)
at com.example.myapplication.MainActivity.onActivityResult(MainActivity.java:254)
at android.app.Activity.dispatchActivityResult(Activity.java:7295)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4361)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4409) 
at android.app.ActivityThread.-wrap19(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1670) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6687) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810) 
The uri is not wrong because I can further extract the name of the folder (and the size=0), that is successfully created on the Drive cloud.
What's wrong instead? It seems that my app cannot handle it as a document tree.
This is working with Google Drive cloud space but maybe it's a hack. It is not guaranteed to always work.
This example creates a cloud file in a cloud folder that was created by the user (the SAF picker is opened by the app).
Creating the cloud folder (the user has to select the cloud root first from the picker UI)
Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
intent.setType("vnd.android.document/directory");
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
startActivityForResult(intent, CREATE_DIRECTORY_REQUEST_CODE);
onActivityResult
#Override
protected void onActivityResult(int requestCode,int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CREATE_DIRECTORY_REQUEST_CODE)
{
if (resultCode == Activity.RESULT_OK) {
int takeFlags = data.getFlags()
&
(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
ContentResolver resolver = this.getContentResolver();
resolver.takePersistableUriPermission(data.getData(),takeFlags);
archiveUri(data.getData().toString()); //important to save the toString() result, not getPath()
archiveAuthority(data.getData().getAuthority());
}
else
{
// The user cancelled the request.
}
}
}
using the Uri next time
ContentResolver contentResolver;
contentResolver = this.getContentResolver();
uriPath=retrieveArchivedUri();
Uri tempUri;
Uri uri;
String authority;
tempUri=Uri.parse(uriPath);
authority=retrieveArchivedAuthority();
uri= DocumentsContract.buildDocumentUri(authority,
DocumentsContract.getDocumentId(tempUri)); //folder Uri
try
{
DocumentsContract.createDocument(contentResolver,uri,"plain/text","fileName");
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}

java.io.FileNotFoundException: (Permission denied) Only in Oreo

I am downloading photos to smartphone. For versions lower than Oreo, there's no problem. But for Oreo, my code isn't not working. I tried this code in Emulator:
I implemented a function to save an image to external storage.
private void saveImageToExternalStorage(Bitmap finalBitmap,String name) {
String root = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString();
File myDir = new File(root + "/xx");
myDir.mkdirs();
String fname = name + ".jpg";
File file = new File(myDir, fname);
if (file.exists())
file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
}
catch (Exception e) {
e.printStackTrace();
}
// Tell the media scanner about the new file so that it is
// immediately available to the user.
MediaScannerConnection.scanFile(this, new String[] { file.toString() }, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
Log.i("ExternalStorage", "Scanned " + path + ":");
Log.i("ExternalStorage", "-> uri=" + uri);
}
});
}
I am requesting permissions with dexter library.
Dexter.withActivity(MainActivity.this)
.withPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
.withListener(new PermissionListener() {
#Override
public void onPermissionGranted(PermissionGrantedResponse response) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
if (!prefs.getBoolean("firstTime", false)) {
task.execute();
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("firstTime", true);
editor.commit();
}
}
#Override
public void onPermissionDenied(PermissionDeniedResponse response) {
Toast.makeText(MainActivity.this, "You need to allow permission if you want to use camera", Toast.LENGTH_LONG).show();
}
#Override
public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
token.continuePermissionRequest();
Toast.makeText(MainActivity.this, "You need to allow permission if you want to use camera", Toast.LENGTH_LONG).show();
}
}).check();
I save images with asynctask
final AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
private ProgressDialog dialog;
#Override
protected void onPreExecute()
{
this.dialog = new ProgressDialog(MainActivity.this);
this.dialog.setMessage(getString(R.string.newfeature));
this.dialog.setCancelable(false);
this.dialog.setOnCancelListener(new DialogInterface.OnCancelListener()
{
#Override
public void onCancel(DialogInterface dialog)
{
// cancel AsyncTask
cancel(false);
}
});
this.dialog.show();
}
#Override
protected Void doInBackground(Void... params)
{
// do your stuff
Bitmap myBitmap2 = BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.im2);
saveImageToExternalStorage(myBitmap2,"imag2");
myBitmap2.recycle();
return null;
}
#Override
protected void onPostExecute(Void result)
{
//called on ui thread
if (this.dialog != null) {
this.dialog.dismiss();
}
}
#Override
protected void onCancelled()
{
//called on ui thread
if (this.dialog != null) {
this.dialog.dismiss();
}
}
};
I can see Storage permission is granted when I look Settings --> Apps for my app. But images are not saved correctly. In fact images are saved but all of them is green square like this.
As a result, it gives permission denied error although permission is granted.
09-21 13:11:08.023 17636-17765/xx.xx W/System.err: java.io.FileNotFoundException: /storage/emulated/0/Pictures/xx/imag2.jpg (Permission denied)
09-21 13:11:08.024 17636-17765/xx.xx W/System.err: at java.io.FileOutputStream.open0(Native Method)
09-21 13:11:08.024 17636-17765/xx.xx W/System.err: at java.io.FileOutputStream.open(FileOutputStream.java:308)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:238)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:180)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at xx.xx.MainActivity.saveImageToExternalStorage(MainActivity.java:804)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at xx.xx.MainActivity.access$000(MainActivity.java:62)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at xx.xx.MainActivity$1.doInBackground(MainActivity.java:119)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at xx.xx.MainActivity$1.doInBackground(MainActivity.java:89)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:333)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
09-21 13:11:08.033 17636-17765/xx.xx W/System.err: at java.lang.Thread.run(Thread.java:764)
Access Sd-Card's files
Use DOCUMENT_TREE dialog to get sd-card's Uri.
Inform user about how to choose sd-card on the dialog. (with pictures or gif animations)
// call for document tree dialog
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
startActivityForResult(intent, REQUEST_CODE_OPEN_DOCUMENT_TREE);
On onActivityResult you'll have the selected directory Uri. (sdCardUri)
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_CODE_OPEN_DOCUMENT_TREE:
if (resultCode == Activity.RESULT_OK) {
sdCardUri = data.getData();
}
break;
}
}
Now must check if the user,
a. selected the sd-card
b. selected the sd-card that our file is on (some devices could have multiple sd-cards).
We check both a and b by finding the file through the hierarchy, from sd root to our file. If file found, both of a and b conditions are acquired.
//First we get `DocumentFile` from the `TreeUri` which in our case is `sdCardUri`.
DocumentFile documentFile = DocumentFile.fromTreeUri(this, sdCardUri);
//Then we split file path into array of strings.
//ex: parts:{"", "storage", "extSdCard", "MyFolder", "MyFolder", "myImage.jpg"}
// There is a reason for having two similar names "MyFolder" in
//my exmple file path to show you similarity in names in a path will not
//distract our hiarchy search that is provided below.
String[] parts = (file.getPath()).split("\\/");
// findFile method will search documentFile for the first file
// with the expected `DisplayName`
// We skip first three items because we are already on it.(sdCardUri = /storage/extSdCard)
for (int i = 3; i < parts.length; i++) {
if (documentFile != null) {
documentFile = documentFile.findFile(parts[i]);
}
}
if (documentFile == null) {
// File not found on tree search
// User selected a wrong directory as the sd-card
// Here must inform user about how to get the correct sd-card
// and invoke file chooser dialog again.
} else {
// File found on sd-card and it is a correct sd-card directory
// save this path as a root for sd-card on your database(SQLite, XML, txt,...)
// Now do whatever you like to do with documentFile.
// Here I do deletion to provide an example.
if (documentFile.delete()) {// if delete file succeed
// Remove information related to your media from ContentResolver,
// which documentFile.delete() didn't do the trick for me.
// Must do it otherwise you will end up with showing an empty
// ImageView if you are getting your URLs from MediaStore.
//
Uri mediaContentUri = ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
longMediaId);
getContentResolver().delete(mediaContentUri , null, null);
}
}
Note:
You must provide access permission to the external storage inside your manifest and for os>=Marshmallow inside the app.
https://stackoverflow.com/a/32175771/2123400
Edit Sd-Card's Files
For editing an existing image on your sd-card you don't need any of above steps if you want to invoke another app to do it for you.
Here we invoke all the activities (from all the installed apps) with the capability of editing the images. (Programmers mark their apps in the manifest for its capabilities to provide accessibility from other apps (activities)).
on your editButton click event:
String mimeType = getMimeTypeFromMediaContentUri(mediaContentUri);
startActivityForResult(Intent.createChooser(new Intent(Intent.ACTION_EDIT).setDataAndType(mediaContentUri, mimeType).putExtra(Intent.EXTRA_STREAM, mediaContentUri).addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION), "Edit"), REQUEST_CODE_SHARE_EDIT_SET_AS_INTENT);
and this is how to get mimeType:
public String getMimeTypeFromMediaContentUri(Uri uri) {
String mimeType;
if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
ContentResolver cr = getContentResolver();
mimeType = cr.getType(uri);
} else {
String fileExtension = MimeTypeMap.getFileExtensionFromUrl(uri
.toString());
mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(
fileExtension.toLowerCase());
}
return mimeType;
}
Note:
On Android KitKat(4.4) don't ask the user to select the sd-card because on this version of Android DocumentProvideris not applicable, hence we have no chance to have access to the sd-card with this approach.
Look at the API level for the DocumentProvider
https://developer.android.com/reference/android/provider/DocumentsProvider.html
I couldn't find anything that works on Android KitKat(4.4). If you found anything useful with KitKat please share with us.
On versions below the KitKat access to sd-card is already provided by the OS.

How to open a file from a URI/Uri in Android

I am trying to open a file from my emulator's internal storage (was trying to put it in sdcard but it put to internal storage?). I have the user choose a file, then pass that file's Uri (note the case) to a text editing activity via intent. In this activity, I've tried a few things. My current code looks like this (excuse the madness, I've been trying a LOT of things):
try {
Intent intent = getIntent();
File file;
Uri uri = Parcels.unwrap(intent.getParcelableExtra("uri"));
URI newUri = new URI("file://"+uri.toString());
Log.d("uri", uri.toString());
Log.d("newUri", newUri.toString());
file = new File(newUri);
if (intent != null) {
Log.d("uriPath", uri.toString());
if (uri != null) {
file = new File(uri.getPath());
String text = readTextFile(file);
if (text != null) {
Log.d("in if text not null", text);
mEditText.setText(text);
}
// mEditText.setText(readTextFile(file));
}
}
}
catch(URISyntaxException e) { e.printStackTrace(); }
I've tried a LOT of things, with no success. I'm either getting file not found (as it's not prefixing the file with anything, just trying to load "document/primary%3Aindex.html"), or other exceptions, currently:
06-06 05:43:18.826 10794-10794/net.a40two.pext E/AndroidRuntime: FATAL EXCEPTION: main
Process: net.a40two.pext, PID: 10794
java.lang.RuntimeException: Unable to start activity ComponentInfo{net.a40two.pext/net.a40two.pext.ui.EditorActivity}: java.lang.IllegalArgumentException: Found authority in URI: file://content://com.android.externalstorage.documents/document/primary%3Aindex.html
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalArgumentException: Found authority in URI: file://content://com.android.externalstorage.documents/document/primary%3Aindex.html
at java.io.File.checkURI(File.java:230)
at java.io.File.<init>(File.java:175)
at net.a40two.pext.ui.EditorActivity.onCreate(EditorActivity.java:67)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
This happens even without the file:// concatenation. Most anything I can find online is either incredibly old, doesn't work, or both. Any help is sincerely appreciated.
The code in my main activity where I'm getting this URI is straight from developers.android.com:
public void onActivityResult(int requestCode, int resultCode,
Intent resultData) {
// The ACTION_OPEN_DOCUMENT intent was sent with the request code
// READ_REQUEST_CODE. If the request code seen here doesn't match, it's the
// response to some other intent, and the code below shouldn't run at all.
if (requestCode == READ_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
// The document selected by the user won't be returned in the intent.
// Instead, a URI to that document will be contained in the return intent
// provided to this method as a parameter.
// Pull that URI using resultData.getData().
Uri uri = null;
if (resultData != null) {
uri = resultData.getData();
Log.i("onActivityResult", "Uri: " + uri.toString());
Intent intent = new Intent(MainActivity.this, EditorActivity.class);
intent.putExtra("uri", Parcels.wrap(uri));
startActivity(intent);
finish();
}
}
}

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