Develop Reference

not able to move images to another folder in gallery, using asynctask

I created an image gallery app.
My requirment: I want to select multiple images, click on button cut and come back to activity which displays all folders (ImageGallery.java). Now, I want to select a folder and paste all the selected images in that folder, on selecting the folder.
What is happening? I am able to select images using my app and come back to activity which displays all folders but not able to move them using my app.
I put the code for moving images in a background thread using task. I select images from one folder, come back to the activity which displays all the folders (ImageGallery.java) and select the folder to which the images are to be moved. But when I try to move images, selected images do not move to other folder being selected, on selecting a folder. I guess the code inside AsyncTask isn't even getting executed.
How do I fix it ?
PhotosActivity.java (Activity used to select images):
int int_position;
private GridView gridView;
GridViewAdapter adapter;
ArrayList<Model_images> al_menu = new ArrayList<>();
private ArrayList<Integer> mSelected = new ArrayList<>();
boolean boolean_folder;
gridView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(final AdapterView<?> parent, View view, final int position, long id) {
if (mSelected.contains(position)) {
mSelected.remove(position);
view.setBackgroundColor(Color.TRANSPARENT);// remove item from list
// update view (v) state here
// eg: remove highlight
} else {
mSelected.add(position);
view.setBackgroundColor(Color.LTGRAY);// add item to list
// update view (v) state here
// eg: add highlight
}
buttoncut.setVisibility(View.VISIBLE);
button2.setVisibility(View.VISIBLE);
button3.setVisibility(View.VISIBLE);
button4.setVisibility(View.VISIBLE);
button5.setVisibility(View.VISIBLE);
buttoncut.setOnClickListener(
new View.OnClickListener() {
public void onClick(View view) {
buttoncut.setVisibility(View.GONE);
button2.setVisibility(View.GONE);
button3.setVisibility(View.GONE);
button4.setVisibility(View.GONE);
button5.setVisibility(View.GONE);
Intent moveIntent = new Intent(PhotosActivity.this, ImageGallery.class);
moveIntent.putIntegerArrayListExtra("selected_images", mSelected);
startActivity(moveIntent);
}
});
ImageGallery.java:
public static ArrayList<Model_images> al_images = new ArrayList<>();
ArrayList<Integer> selectedImages = new ArrayList<>();
boolean boolean_folder;
Adapter_PhotosFolder obj_adapter;
GridView gv_folder;
private static final int REQUEST_PERMISSIONS = 100;
int int_position;
selectedImages = getIntent().getIntegerArrayListExtra("selected_images");
if (selectedImages != null) {
Toast.makeText(ImageGallery.this, "This code gets executed", Toast.LENGTH_SHORT)
.show();
new LongOperation().execute();
}
private class LongOperation extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
for (int image : selectedImages) {
File sourceImage = new File(al_images.get(int_position).getAl_imagepath().get(image)); //returns the image File from model class to be moved.
File destinationImage = new File(al_images.get(int_position).getStr_folder(), ".jpeg");
try {
copyOrMoveFile(sourceImage, destinationImage, true);
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
//Method to move the file
private void copyOrMoveFile(File file, File dir, boolean isCopy) throws IOException {
File newFile = new File(dir, file.getName());
FileChannel outChannel = null;
FileChannel inputChannel = null;
try {
outChannel = new FileOutputStream(newFile).getChannel();
inputChannel = new FileInputStream(file).getChannel();
inputChannel.transferTo(0, inputChannel.size(), outChannel);
inputChannel.close();
if (!isCopy)
file.delete();
} finally {
if (inputChannel != null) inputChannel.close();
if (outChannel != null) outChannel.close();
}
}
}

You have to use Intent.ACTION_MEDIA_SCANNER_SCAN_FILE for updating media store.
Inside AsyncTask -> onPostExecute method fetch latest images from MediaStore
private class LongOperation extends AsyncTask<String, Void, File> {
#Override
protected File doInBackground(String... params) {
for (String imagePath : selectedImages) {
File sourceImage = new File(imagePath); //returns the image File from model class to
// be// moved.
File destinationImage = new File(al_images.get(int_position).getDirectoryPath() +
File.separator + sourceImage.getName());
try {
moveFile(sourceImage, destinationImage, true);
return destinationImage;
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPreExecute() {
}
#Override
protected void onPostExecute(File file) {
super.onPostExecute(file);
getBaseContext().sendBroadcast(new Intent(
Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
fn_imagespath(); // Call method to fetch latest images.
}
}, 1000); // additional delay time of 1 sec to update media scanner
}
}
Just a better method to move file
private void moveFile(File file_Source, File file_Destination, boolean isCopy) throws IOException {
FileChannel source = null;
FileChannel destination = null;
if (!file_Destination.exists()) {
file_Destination.createNewFile();
}
try {
source = new FileInputStream(file_Source).getChannel();
destination = new FileOutputStream(file_Destination).getChannel();
long count = 0;
long size = source.size();
while ((count += destination.transferFrom(source, count, size - count)) < size) ;
if (!isCopy) {
file_Source.delete();
}
} finally {
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
}

Not much changes in code added MediaScannerConnection. Give it a try .
private class LongOperation extends AsyncTask<String, Void, Integer> {
#Override
protected Integer doInBackground(String... params) {
int movedCount=0;
for (int i=0;i<selectedImages.size();i++) {
File sourceImage = new File(al_images.get(int_position).getAl_imagepath().get(i));
File destinationImage = new File(al_images.get(int_position).getStr_folder(), ".jpeg");
try {
boolean isMoved= copyOrMoveFile(sourceImage, destinationImage, true);
if(isMoved) {
movedCount++;
callMediaScanner(ImageGallery.this, destinationImage.getAbsolutePath());
}
} catch (IOException e) {
e.printStackTrace();
}
}
return movedCount;
}
#Override
protected void onPostExecute(Integer val) {
super.onPostExecute(val);
// Here you have to modify return type of doInBackground as per your convineance
if(val.intValue()==selectedImages.size()){
Log.e("Moved","Allfile moved");
}else{
Log.e("Moved","Some file missing");
}
}
public boolean copyOrMoveFile(File localFile, File destinationFile, boolean isCopy) {
FileChannel outputChannel = null;
FileChannel inputChannel = null;
try {
outputChannel = new FileOutputStream(destinationFile).getChannel();
inputChannel = new FileInputStream(localFile).getChannel();
inputChannel.transferTo(0, inputChannel.size(), outputChannel);
inputChannel.close();
if (!isCopy)
localFile.delete();
} catch (Exception e) {
e.printStackTrace();
return false;
} finally {
try {
if (inputChannel != null) inputChannel.close();
if (outputChannel != null) outputChannel.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return true;
}
}
public void callMediaScanner(Context context, String path) {
MediaScannerConnection.scanFile(context,
new String[] { path }, null,null);
}

Difference between triggering camera.take picture from button click[Working] and through function call[Not working]

I am stuck at this. MY application clicks multiple images programmatically.
Issue is my take picture call is inside button listener click function.
1. When i do button click it triggers the thread for take picture that works.
2. If i directly call that obj.run() it does not-> shows take picture failed at run time.
3. If i do btn.perform click - still fails.
I am building an application that listens on a socket and on a trigger click multiple images n save them to create .gif.
code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// android.support.v7.appcompat.R.layout.activity_main;
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
myContext = this;
initialize();
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
cameraId = i;
cameraFront = true;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraFront = false;
break;
}
}
return cameraId;
}
public void onResume() {
super.onResume();
if (!hasCamera(myContext)) {
Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG);
toast.show();
finish();
}
if (mCamera == null) {
//if the front facing camera does not exist
if (findFrontFacingCamera() < 0) {
Toast.makeText(this, "No front facing camera found.", Toast.LENGTH_LONG).show();
switchCamera.setVisibility(View.GONE);
}
mCamera = Camera.open(findFrontFacingCamera());
// mCamera.Parameters.class.
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
capture.performClick();
Log.d("naval", "onresume- clicked performed");
}
}
public void initialize() {
cameraPreview = (LinearLayout) findViewById(R.id.camera_preview);
mPreview = new CameraPreview(myContext, mCamera);
cameraPreview.addView(mPreview);
capture = (Button) findViewById(R.id.button_capture);
// capture.setVisibility(View.GONE);
capture.setOnClickListener(captrureListener);
// capture.performClick();
switchCamera = (Button) findViewById(R.id.button_ChangeCamera);
switchCamera.setVisibility(View.GONE); // JUST CHANGE THIS TO MAKE SWITCH CAMERA WORKS
switchCamera.setOnClickListener(switchCameraListener);
Log.d("naval", "initialize");
}
OnClickListener switchCameraListener = new OnClickListener() {
#Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG);
toast.show();
}
}
};
public void chooseCamera() {
//if the camera preview is the front
if (cameraFront) {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
}
#Override
protected void onPause() {
super.onPause();
//when on Pause, release camera in order to be used from other applications
releaseCamera();
Log.d("naval", "onpause");
}
private boolean hasCamera(Context context) {
//check if the device has camera
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
private PictureCallback getPictureCallback() {
PictureCallback picture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//make a new picture file
File pictureFile = getOutputMediaFile();
Log.d("naval", "picture call back start");
if (pictureFile == null) {
return;
}
try {
//write the file
FileOutputStream fos = new FileOutputStream(pictureFile);
Log.d("naval", "picture call back stream creation");
fos.write(data);
fos.close();
Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG);
Log.d("naval", "picture call back toast");
toast.show();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
//refresh camera to continue preview
mPreview.refreshCamera(mCamera);
//cameraPreview.start();
}
};
return picture;
}
OnClickListener captrureListener = new OnClickListener() {
#Override
public void onClick(View v) {
try {
Thread.sleep(1000);
}catch (Exception e)
{
e.printStackTrace();
}
CaptureThread captureThread = new CaptureThread();
captureThread.start();
/* String str = "";
while(true)
{
Log.d("naval","waiting for start inside file loop");
str = readFromFile();
if(str.equals("start")) {
Log.d("naval","calling capture object");
str = "";
CaptureThread captureThread = new CaptureThread();
captureThread.start();
}
else
{
try {
Log.d("naval","sleeping inside str loop");
Thread.sleep(1000);
}catch(Exception e)
{
e.printStackTrace();
}
continue;
// put sleep here
}
// read text file here at location /sdcard/info/info.txt
}*/
}
};
private String readFromFile() {
String ret = "";
try {
FileInputStream fis = new FileInputStream (new File("/storage/emulated/0/info/info.txt")); // 2nd line
// InputStream inputStream = openFileInput("/storage/emulated/0/info/info.txt");
if ( fis != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(fis);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}
fis.close();
ret = stringBuilder.toString();
Log.d("naval- string",ret);
if(!ret.isEmpty())
{
Log.d("naval","str is not null");
//delete file or clear file and create one
File fil = new File("/storage/emulated/0/info/info.txt");
fil.delete();
// create
File file = new File("/storage/emulated/0/info/info.txt");
file.createNewFile();
}
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}
//make picture and save to a folder
private static File getOutputMediaFile() {
//make a new file directory inside the "sdcard" folder
File mediaStorageDir = new File("/sdcard/", "pics");
Log.d("naval", "save picture function");
//if this "JCGCamera folder does not exist
if (!mediaStorageDir.exists()) {
//if you cannot make this folder return
if (!mediaStorageDir.mkdirs()) {
return null;
}
}
Log.d("naval", "cave picture betweent");
//take the current timeStamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
//and make a media file:
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "pic" + glo + ".png");
Log.d("naval", "File path above");
glo++;
return mediaFile;
}
private void releaseCamera() {
// stop and release camera
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}
class CaptureThread extends Thread {
#Override
public void run() {
int count = 0;
while(count < 6) {
**mCamera.takePicture(null, null, mPicture);**
count++;
try {
Thread.sleep(1000);
} catch (InterruptedException exception) {
exception.printStackTrace();
}
}
createGif();
}
public void createGif()
{
ByteArrayOutputStream bos = new ByteArrayOutputStream();
AnimatedGifEncoder encoder = new AnimatedGifEncoder();
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize = 6;
encoder.setDelay(100);
encoder.start(bos);
for(int i = 0;i<6;i++){
Bitmap bMap = BitmapFactory.decodeFile("/storage/emulated/0/pics/pic"+i+".png",options);
Log.d("naval","added image");
encoder.addFrame(bMap);
}
encoder.finish();
writeToFile(bos.toByteArray());
}
public void writeToFile(byte[] array) {
try {
String path = Environment.getExternalStorageDirectory() + "/gif/gif.gif";
FileOutputStream stream = new FileOutputStream(path);
stream.write(array);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

ok the answer is from button click it comes from UI thread. But the function call does not. to run this call the function from UI thread . It will work!!

Downloading list of audio from URL

So I'm implementing audio Playlist app that imports audios from Parse.com, and when I retrieve them by streaming them directly from their URls, it took maybe one minute to play after clicking play button.
So I don't want to use streaming from URL methods to play my audio from server because it makes it so slow. Instead I want to download list of audios from server (Parse.com) at once and then playing them by retrieving from sdcard.
I have the class that downloads single audio from single URL .. I want to edit the code to make it downloads more than one audio at once.
here is the class I have to download audio from URL.
class DownloadMusicfromInternet extends AsyncTask<String, String, String> {
private Context mContext;
private MediaPlayer mPlayer;
public DownloadMusicfromInternet(Context context) {
mContext = context;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
// Download Music File from Internet
#Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// Get Music file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(), 10 * 1024);
// Output stream to write file in SD card
OutputStream output = new
Also if you could help me in how to set a name for the audios, I don't want to write static name because I'm downloading more than one audio at a time .
FileOutputStream(Environment.getExternalStorageDirectory().getPath() + "/"+"how to put unique name for each audio here ?"+".mp3");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// Write data to file
output.write(data, 0, count);
}
// Flush output
output.flush();
// Close streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
// While Downloading Music File
// Once Music File is downloaded
#Override
protected void onPostExecute(String file_url) {
// Play the music
playMusic();
}
// Play Music
protected void playMusic() {
// Read Mp3 file present under SD card
Uri myUri1 = Uri.parse("file:///sdcard/"+"the same unique name that was set previously ! "+".mp3");
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mPlayer.setDataSource(mContext.getApplicationContext(), myUri1);
mPlayer.prepare();
// Start playing the Music file
mPlayer.start();
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
// Once Music is completed playing, enable the button
// btnPlayMusic.setEnabled(true);
Toast.makeText(mContext.getApplicationContext(), "Music completed playing", Toast.LENGTH_LONG).show();
}
});
} catch (IllegalArgumentException e) {
Toast.makeText(mContext.getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (SecurityException e) {
Toast.makeText(mContext.getApplicationContext(), "URI cannot be accessed, permissed needed", Toast.LENGTH_LONG).show();
} catch (IllegalStateException e) {
Toast.makeText(mContext.getApplicationContext(), "Media Player is not in correct state", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(mContext.getApplicationContext(), "IO Error occured", Toast.LENGTH_LONG).show();
}
}
}
and this is my adapter, and here is where my problem occurs and crashes my app. I don't know how to call ( DownloadMusicfromInternet ) more than once from the following adapter .
public class mAdapter extends ParseQueryAdapter<ParseObject> {
public mAdapter (Context context) {
super(context, new ParseQueryAdapter.QueryFactory<ParseObject>() {
public ParseQuery create() {
ParseQuery query = new ParseQuery("MusicPlaylist");
return query;
}
});
}
#Override
public View getItemView(final ParseObject object, View v, ViewGroup parent) {
if (v == null) {
v = View.inflate(getContext(), R.layout.list_music, null);
}
super.getItemView(object, v, parent);
//Audio retrieving
final ImageButton btn = (ImageButton) v.findViewById(R.id.play_btn);
final ParseFile fileObject = object.getParseFile("music");
**// here I put a loop because I want it to download a list of audios at once and I think here is the problem**
if (fileObject != null) {
for (int i = 10; i >= j; j++) {
new DownloadMusicfromInternet().execute(fileObject.getUrl());
}
fileObject.getDataInBackground(new GetDataCallback() {
#Override
public void done(byte[] bytes, com.parse.ParseException e) {
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
}//end on click
}//end listener
);
}//end done
});//end get data
}//end if
return v;
}//end getItem View
}//end mAdapter
Any help would be appreciated ..

How to use MediaScannerConnection scanFile?

I'm downloading image to a folder on the SDCARD. Since the images and my folder is not immediately visible in the Gallery I'm trying to get the MediaScannerConnection to update and show the folder/images in the gallery.
Shows you how to do this in view code ?
private void downloadImage() {
if (future != null) {
//set the callback and start downloading
future.withResponse().setCallback(new FutureCallback<Response<InputStream>>() {
#Override
public void onCompleted(Exception e, Response<InputStream> result) {
boolean success = false;
if (e == null && result != null && result.getResult() != null) {
try {
//prepare the file name
String url = mSelectedImage.getUrl();
String fileName = url.substring(url.lastIndexOf('/') + 1, url.length());
//create a temporary directory within the cache folder
File dir = Utils.getAlbumStorageDir("wall-tx");
//create the file
File file = new File(dir, fileName);
if (!file.exists()) {
file.createNewFile();
}
//copy the image onto this file
Utils.copyInputStreamToFile(result.getResult(), file);
//animate the first elements
animateCompleteFirst(true);
//Broadcast the Media Scanner Intent to trigger it
success = true;
} catch (Exception ex) {
Log.e("walltx", ex.toString());
}
//animate after complete
animateComplete(success);
} else {
animateReset(true);
}
}
});
}
}

MediaScannerConnection.scanFile(this, new String[]{file.getPath()},
null, new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
// now visible in gallery
}
});

I can not see download image in gallery until I restart the phone

When I download an image and save it to the Android device the image does not appear in the gallery, later after the phone is restarted the images are in the gallery.
Here is the code where I download the images and save them to the device:
private void downloadImage() {
if (future != null) {
//set the callback and start downloading
future.withResponse().setCallback(new FutureCallback<Response<InputStream>>() {
#Override
public void onCompleted(Exception e, Response<InputStream> result) {
boolean success = false;
if (e == null && result != null && result.getResult() != null) {
try {
//prepare the file name
String url = mSelectedImage.getUrl();
String fileName = url.substring(url.lastIndexOf('/') + 1, url.length());
//create a temporary directory within the cache folder
File dir = Utils.getAlbumStorageDir("wall-tumbler");
//create the file
File file = new File(dir, fileName);
if (!file.exists()) {
file.createNewFile();
}
//copy the image onto this file
Utils.copyInputStreamToFile(result.getResult(), file);
//animate the first elements
animateCompleteFirst(true);
success = true;
} catch (Exception ex) {
Log.e("walltumbler", ex.toString());
}
//animate after complete
animateComplete(success);
} else {
animateReset(true);
}
}
});
}
}
#TargetApi(Build.VERSION_CODES.KITKAT)
private void downloadAndSetOrShareImage(final boolean set) {
if (future != null) {
//set the callback and start downloading
future.withResponse().setCallback(new FutureCallback<Response<InputStream>>() {
#Override
public void onCompleted(Exception e, Response<InputStream> result) {
boolean success = false;
if (e == null && result != null && result.getResult() != null) {
try {
//create a temporary directory within the cache folder
File dir = new File(DetailActivity.this.getCacheDir() + "/images");
if (!dir.exists()) {
dir.mkdirs();
}
//create the file
File file = new File(dir, "walltumbler.jpg");
if (!file.exists()) {
file.createNewFile();
}
//copy the image onto this file
Utils.copyInputStreamToFile(result.getResult(), file);
//get the contentUri for this file and start the intent
Uri contentUri = FileProvider.getUriForFile(DetailActivity.this, "com.mikepenz.fileprovider", file);
if (set) {
//get crop intent
Intent intent = WallpaperManager.getInstance(DetailActivity.this).getCropAndSetWallpaperIntent(contentUri);
//start activity for result so we can animate if we finish
DetailActivity.this.startActivityForResult(intent, ACTIVITY_CROP);
} else {
//share :D
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setData(contentUri);
shareIntent.setType("image/jpg");
shareIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
//start activity for result so we can animate if we finish
DetailActivity.this.startActivityForResult(Intent.createChooser(shareIntent, "Share Via"), ACTIVITY_SHARE);
}
success = true;
} catch (Exception ex) {
Log.e("walltumbler", ex.toString());
}
//animate after complete
animateComplete(success);
} else {
animateReset(true);
}
}
});
}
}
Utils
/**
* http://developer.android.com/training/basics/data-storage/files.html
*
* #param albumName
* #return
*/
public static File getAlbumStorageDir(String albumName) {
// Get the directory for the user's public pictures directory.
boolean success = false;
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), albumName);
if (!file.exists()) {
success = file.mkdir();
}
if (!success)
Log.i("wall-tumbler", "Directory not created");
else
Log.i("wall-tumbler", "Directory created");
return file;
}
/**
* http://developer.android.com/training/basics/data-storage/files.html
*
* #return
*/
public static boolean isExternalStorageWritable() {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
return true;
}
return false;
}
}
ScreenShot
http://i.stack.imgur.com/6dkp0.jpg

You should use the MediaStore content provider to add an image to the gallery.
ContentValues values = new ContentValues();
values.put(Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.MediaColumns.DATA, imagePath);
context.getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values);