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Android, Glide Image Loading Library: NullPointerException, ProviderInfo

Just getting into the Glide image loading library for Android. Currently working with some code from here:
https://github.com/bumptech/glide/issues/459
My full project is here is you want to look at it:
https://github.com/mhurwicz/glide02
I'm getting the following exception when I run the app in the emulator in Android Studio:
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
This is the key statement in MainActivity:
new ShareTask(this).execute("http://thelink");
(thelink is actually goo.gl/gEgYUd -- couldn't leave that in above because stackoverflow doesn't allow URL shorteners. )
Here is my code for the ShareTask class
class ShareTask extends AsyncTask<String, Void, File> {
private final Context context;
public ShareTask(Context context) {
this.context = context;
}
#Override protected File doInBackground(String... params) {
String url = params[0]; // should be easy to extend to share multiple images at once
try {
return Glide
.with(context)
.load(url)
.downloadOnly(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
.get() // needs to be called on background thread
;
} catch (Exception ex) {
Log.w("SHARE", "Sharing " + url + " failed", ex);
return null;
}
}
#Override protected void onPostExecute(File result) {
if (result == null) { return; }
Uri uri = FileProvider.getUriForFile(context, context.getPackageName(), result);
share(uri); // startActivity probably needs UI thread
}
private void share(Uri result) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/jpeg");
intent.putExtra(Intent.EXTRA_SUBJECT, "Shared image");
intent.putExtra(Intent.EXTRA_TEXT, "Look what I found!");
intent.putExtra(Intent.EXTRA_STREAM, result);
context.startActivity(Intent.createChooser(intent, "Share image"));
}
}
Using debug, it seems I may be running into trouble at the get() statement. For one thing, the width and the height are very large negative numbers. (See the code highlighted in green below.) Then the get() statement returns null. (See the code highlighted in red below.)
Thanks in advance for any help you can provide!

The NPE is coming from FileProvider.getUriForFile because you're passing in the wrong authority. You declared android:authorities="com.example.fileprovider" in the manifest, but you're using the package name at the call. This fails to resolve the info in FileProvider.parsePathStrategy. Match those two strings up and you'll be good to go.
The easiest fix is to use android:authorities="${applicationId}", this leads to 0 hardcoded strings, so you can keep using context.getPackageName().
Regarding your concerns during debug:
Target.SIZE_ORIGINAL is declared to be MIN_VALUE, hence the large number
it's not returning null, IDEA is just confused about where it is in the method, that return null; shouldn't be executed if it fails in the FileProvider code.
doGet(null): null is the timeout here, it's guarded properly in code
I've run the app and weirdly I got a log line saying
W/SHARE: Sharing http://... failed
but not a stack trace, which is weird, because ex cannot be null in a catch!

Codename One Java Scanner - Mobile App Build Error

I am building a Codename One Mobile Java app that requires to scan bar codes. I get build error on the build server. It used to work but of late in the last month I can't build a scanner app. Has anyone encountered this challenge? How can I resolve it? Below are the steps I took. Thanks!
I created a sample cn1 hello world barebones app with the native theme.
I imported these after adding the cn1-codescan and QRScanner libs using the Codename One Settings Wizard.
ext.codescan.CodeScanner and codename1.ext.codescan.ScanResult and littlemonkey.qrscanner.QRScanner
I created button to scan a bar code.
Button btn_scanBarcode = new Button("Barcode");
btn_scanBarcode.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent evt)
{
if (CodeScanner.getInstance() != null)
{
QRScanner.scanBarCode(new ScanResult()
{
public void scanCompleted(String contents, String formatName, byte[] rawBytes)
{
Dialog.show("Completed", contents, "OK", null);
}
public void scanCanceled()
{
Dialog.show("Cancelled", "Scan Cancelled", "OK", null);
}
public void scanError(int errorCode, String message)
{
Dialog.show("Error", message, "OK", null);
}
});
}
else
{
Dialog.show("Not Supported","Bar Code Scanning is not available on this device","OK",null);
}
}
});

You need to remove the old cn1libs and install the latest version from the extension manager UI within Codename One Settings.
I suggest deleting the ios.* and android.* build hints too so refresh client libs will update them to the latest version.

Unable to create link with DBX chooser error android

I am attempting to integrate the Dropbox chooser drop-in api into my application. I am running into an abnormal issue. In my app when I launch the dbx chooser, anytime that I select a file the application fails with the following error code:
Sorry, an error has occurred. Please try again later.
Here is the portion of my code that implements the Dropbox API. This portion of the code is where the dropbox api is initially invoked.
public void StartDropboxApplication() {
// create the chooser
DbxChooser chooser = new DbxChooser(APP_KEY);
DbxChooser.ResultType result;
// determine which mode to be in // TODO REMOVE ALL BUT FILE CONTENT TODO SIMPLIFY by making this a setting
switch(( (RadioGroup) ParentActivity.findViewById(R.id.link_type)).getCheckedRadioButtonId() ) {
case R.id.link_type_content:
result = DbxChooser.ResultType.DIRECT_LINK;
break;
default:
throw new RuntimeException("Radio Group Related error.");
}
// launch the new activity
chooser.forResultType(result).launch(ParentActivity, 0);
}
Here is the position where the code should then pick it up although it never does.
protected void onActivityResult( int request, int result, Intent data ) {
Log.i(fileName, "result: " + result);
// check to see if the camera took a picture
if (request == 1) {
// check to see if the picture was successfully taken
if (result == Activity.RESULT_OK) {
onPicture();
} else {
Log.i(fileName, "Camera App cancelled.");
}
} else if (request == 0) {
if ( result == Activity.RESULT_OK ) {
onDropbox(data);
} else {
Log.i(fileName, "dropbox related issue.");
}
}
}
Thank you for any help or suggestions that you are able to provide.

I was able to solve my own issues and get this working. On the off chance that someone else has a similar problem I will detail the solution. The first issue was I was that my APP_KEY was incorrect.
The next issue was that I was attempting to read from a direct link instead of a content link. The direct link provides the application with a link to the file on the Dropbox server whereas the content link provides the application with a cached version of the file. If the file is not present on the device, the SDK downloads a copy for you.

How to force app uninstall in order to update?

I did a mistake that apparently can be solved only by uninstalling and then installing my app again.
I delivered a message to the users, but no-one seems to uninstall it.
AFAIK, if I change the certificate file, the play store won't let me upload the application, and
obviously I don't want to upload a new app.
Is there a way to force uninstall in order to update?
Thanks!

There's no killswitch to remotely force uninstalls (that'd be a security nightmare). What you can do is publish a fixed version on Google Play, and wait for users to upgrade.

I don't know if this can help you but i had the same problem. The solution for me is that i check the app version every time the user opens it and compare it with a version code stored on apache server (in a checkversion.php file).
If versions doesn't match, i show a not cancelable dialog that ask the user to go to market and download the update.
Here is an example (keep in mind that i use Volley library to handle connections):
public class UpdateManager {
private Activity ac;
private HashMap<String,String> params;
public UpdateManager(Activity ac) {
this.ac = ac;
}
public void checkForUpdates() {
Log.d("UpdateManager","checkForUpdates() - Started...");
params = new HashMap<String,String>();
params.put("request","checkforupdates");
try {
params.put("versioncode", String.valueOf(ac.getPackageManager().getPackageInfo(ac.getPackageName(), 0).versionCode));
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (Helper.isInternetAvailable(ac)) { //this is a class i made to check internet connection availability
checkAppVersion();
} else { Log.d("UpdateManager","CheckForUpdates(): Impossible to update version due to lack of connection"); }
}
private void checkAppVersion() {
Log.d("UpdateManager","checkAppVersion() - Request started...");
JsonObjectRequest req = new JsonObjectRequest("http://yourserver/checkappversion.php", new JSONObject(params),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
if (response != null && response.has("result")) {
try {
Log.d("UpdateManager","checkAppVersion() - Request finished - Response: "+response.getString("result"));
if (response.getString("result").matches("updaterequested")) { //Update requested. Show the relative dialog
Log.d("UpdateManager","Update requested");
askUserForUpdate();
}
else if (response.getString("result").matches("current")) { //Same version. Do nothing
Log.d("UpdateManager","Version is up to date");
}
else if (response.getString("result").matches("error")) { //You can return an error message if error occurred on server
Log.d("UpdateManager","checkappversion Error - "+response.getString("error"));
}
VolleyLog.v("Response:%n %s", response.toString(4));
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("UpdateManager","Volley Error - "+error.getMessage());
}
});
req.setRetryPolicy(new DefaultRetryPolicy(60000,0,DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
ConnectionController.getInstance().addToRequestQueue(req);
}
public void askUserForUpdate() {
final Dialog diag = new Dialog(ac);
diag.requestWindowFeature(Window.FEATURE_NO_TITLE);
diag.setContentView(R.layout.updatemanager_requestupdate_dialog);
diag.setCancelable(false);
diag.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
TextView t = (TextView)diag.findViewById(R.id.requestupdate_dialog_main_text);
ImageView im_ok = (ImageView)diag.findViewById(R.id.requestupdate_dialog_ok);
ImageView im_canc = (ImageView)diag.findViewById(R.id.requestupdate_dialog_canc);
t.setText(ac.getResources().getString(R.string.update_manager_askuserforupdate));
im_canc.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
diag.dismiss();
ac.finish();
}
});
im_ok.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("market://details?id="+ac.getPackageName()));
diag.dismiss();
ac.startActivity(intent);
ac.finish();
}
});
diag.show();
}
}
You can then use it when your main activity (or maybe login activity) starts like this:
UpdateManager updateManager = new UpdateManager(MainActivity.this); //i assume MainActicity as the calling activity
updateManager.checkForUpdates();
Obviously this has to be implemented into the application code so, the first time, you have to rely only on the user to manually upgrade it. But this can help if you have the same problem in the future.
This is an extract from my personal code so you have to rearrange it to your needings. Hope this helps someone.

Users should be able to go to Settings > Applications > Manage Applications and select the application to be removed. I've never seen a case where the application can't be removed this way, except in the case of built-in applications which require a rooted device to remove.

Android/Java -- Post simple text to Facebook wall?

I'm trying to integrate posting to one's wall from within my app. I already have an area where the user can save his/her username and password (encrypted). I would like my program to recall the saved username and password, pass that to Facebook for authentication, and then allow the app to post simple text (maybe a link too) to the user's wall.
That said, I've read everything on the developer pages at Facebook (the api looks completely foreign to me... I've never done any type of web app development before... just desktop apps), and experimented with the Java libraries here but to be honest, I don't understand any of the various implementations. Some claim to be simple to use, but apparently they are all way above my head.
I've even tried messing with the official Facebook Android SDK, but that uses a webview interface, and I can't pass in the username and password for easy authentication. Plus, I'm still clueless as to how to post to the wall even after correct authentication.
Please help.
Thanks.
Oh, btw I already have a Facebook API key and Application ID.
[UPDATE 1]
For further clarification:
If I use the following code snippet with the official Facebook Android SDK http://github.com/facebook/facebook-android-sdk what should I do next (after the user has logged-in)? This is unclear to me.
Facebook facebookClient = new Facebook();
facebookClient.authorize(this, "[APP ID]", new String[] {"publish_stream", "read_stream", "offline_access"}, this);
where "this" is an Activity that implements a DialogListener, and "[APP ID]" is my Facebook application ID.
Thanks.
[UPDATE 2]
I found a solution (see below), though the only thing missing is the ability to auto-populate the login text boxes with the data I have stored in the app. The official Facebook Android SDK may not allow for this. I'll keep looking into it.

I figured it out, with Tom's help (thanks). The key was creating a dialog with the "stream.publish" API call, using the Facebook Android SDK. Here are the steps:
Download the official Facebook Android SDK : http://github.com/facebook/facebook-android-sdk
Import the project files into Eclipse.
Export the project as a *.jar file. (this might cause a conflict)
[UPDATE]
Facebook recently updated the source code and I noticed the icon file caused resource id conflicts with my projects (Android 1.5+). My solution is to forget about exporting as a jar. Instead, copy the Facebook "com" folder directly into your app's "src" folder (i.e. "com.facebook.android" should be a package in your app... right alongside your source files). If you already have a "com" folder in your "src" folder, don't worry about any dialog boxes that appear about overwriting files, none of your source files should be overwritten. Go back into Eclipse, and refresh the "src" folder and "com.facebook.android" should now be listed as a package. Copy one of the included Facebook icons to your app's "drawable" folder and refresh that as well. Eclipse will complain about the "FbDialog.java" file... just add an import pointing to your app's "R" file to the header of that file (e.g. if your app's package name is "com.android.myapp," then add this: "import com.android.myapp.R;"). Go to #5 if you needed to do this.
Add the .jar file to your project's build path
Look at the following simplified example code:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import com.facebook.android.*;
import com.facebook.android.Facebook.DialogListener;
public class FacebookActivity extends Activity implements DialogListener,
OnClickListener
{
private Facebook facebookClient;
private LinearLayout facebookButton;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.setContentView(R.layout.test);//my layout xml
facebookButton = (LinearLayout)this.findViewById(R.id.Test_Facebook_Layout);
}
#Override
public void onComplete(Bundle values)
{
if (values.isEmpty())
{
//"skip" clicked ?
return;
}
// if facebookClient.authorize(...) was successful, this runs
// this also runs after successful post
// after posting, "post_id" is added to the values bundle
// I use that to differentiate between a call from
// faceBook.authorize(...) and a call from a successful post
// is there a better way of doing this?
if (!values.containsKey("post_id"))
{
try
{
Bundle parameters = new Bundle();
parameters.putString("message", "this is a test");// the message to post to the wall
facebookClient.dialog(this, "stream.publish", parameters, this);// "stream.publish" is an API call
}
catch (Exception e)
{
// TODO: handle exception
System.out.println(e.getMessage());
}
}
}
#Override
public void onError(DialogError e)
{
System.out.println("Error: " + e.getMessage());
}
#Override
public void onFacebookError(FacebookError e)
{
System.out.println("Error: " + e.getMessage());
}
#Override
public void onCancel()
{
}
#Override
public void onClick(View v)
{
if (v == facebookButton)
{
facebookClient = new Facebook();
// replace APP_API_ID with your own
facebookClient.authorize(this, APP_API_ID,
new String[] {"publish_stream", "read_stream", "offline_access"}, this);
}
}
}

AsyncFacebookRunner mAsyncRunner;
Facebook facebook =new Facebook("Your app id");
btnLogin.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
facebook.authorize(FbdemoActivity.this, new String[]{ "user_photos,publish_checkins,publish_actions,publish_stream"},new DialogListener() {
#Override
public void onComplete(Bundle values) {
}
#Override
public void onFacebookError(FacebookError error) {
}
#Override
public void onError(DialogError e) {
}
#Override
public void onCancel() {
}
});
}
});
public void postOnWall(String msg) {
Log.d("Tests", "Testing graph API wall post");
try {
String response = facebook.request("me");
Bundle parameters = new Bundle();
parameters.putString("message", msg);
parameters.putString("description", "test test test");
response = facebook.request("me/feed", parameters,
"POST");
Log.d("Tests", "got response: " + response);
if (response == null || response.equals("") ||
response.equals("false")) {
Log.v("Error", "Blank response");
}
} catch(Exception e) {
e.printStackTrace();
}

Here is an objective answer to your new question, "What do I do next?"
A quick look at the source code leads me to believe this is what you do:
Check this URL for the REST (http://en.wikipedia.org/wiki/Representational_State_Transfer) API methods you can use to leave a comment/post:
http://developers.facebook.com/docs/reference/rest/
Specifically this: http://developers.facebook.com/docs/reference/rest/links.post
Check out lines 171 through 295 of Facebook.java
http://github.com/facebook/facebook-android-sdk/blob/master/facebook/src/com/facebook/android/Facebook.java
To see how to use the API to make these requests.
You'll probably want this method (it's overloaded, see the code).
/**
* Make a request to Facebook's old (pre-graph) API with the given
* parameters. One of the parameter keys must be "method" and its value
* should be a valid REST server API method.
*
* See http://developers.facebook.com/docs/reference/rest/
*
* Note that this method blocks waiting for a network response, so do not
* call it in a UI thread.
*
* Example:
* <code>
* Bundle parameters = new Bundle();
* parameters.putString("method", "auth.expireSession");
* String response = request(parameters);
* </code>
*
* #param parameters
* Key-value pairs of parameters to the request. Refer to the
* documentation: one of the parameters must be "method".
* #throws IOException
* if a network error occurs
* #throws MalformedURLException
* if accessing an invalid endpoint
* #throws IllegalArgumentException
* if one of the parameters is not "method"
* #return JSON string representation of the response
*/
public String request(Bundle parameters)

To those who have problems, in the new facebook(); , the string is you App_id, and just delete the APP_ID in the authorized call.
Don't know why the error message is shown, but I guess that facebook updated the facebook SDK.