Develop Reference

Picasso Image in Database

I have a simple question. How can I save Picasso image (that loads successfully from json) into database. I want to convert it into a bitmap if it possible, or is there another way to save it?
I tried this method for drawable images and its work perfectly.
My code:
public static byte[] imageViewToByte(ImageView image) {
Bitmap bitmap = ((BitmapDrawable) image.getDrawable()).getBitmap();
// Bitmap bitmap=(BitmapDrawable)image.getI);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
return byteArray;`.
}

After successful load of image set to picasso then , use below code to convert image url to bitmap :
try {
URL url = new URL("http://....");
Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch(IOException e) {
System.out.println(e);
}
or, use below :
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
By using sharedpreference ,you can save bitmap to internal storage .

Not getting correct Path when Select Image from Gallery

When I take an image by Camera, its works fine and I get the image path to save in SQLite database and can retrieve the path to show required image. But when I select an image from Gallery I don't get the correct path which I need to save in database for the further retrieve. I don't get image cause the path is incorrect when I save path in the database. So my question is - how can I get the correct absolute path of the gallery image?
#RequiresApi(api = Build.VERSION_CODES.N)
private void onCaptureImageResult(Intent data) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File destination = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bm = BitmapFactory.decodeFile(destination.getAbsolutePath());
ivImage.setImageBitmap(bm);
showImagepathET.setText(destination.getAbsolutePath());// This path will save in database
}
#SuppressWarnings("deprecation")
private void onSelectFromGalleryResult(Intent data) {
Bitmap bm=null;
if (data != null) {
try {
bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData());
} catch (IOException e) {
e.printStackTrace();
}
}
File destination = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
showImagepathET.setText(destination.getAbsolutePath());// This path will save in database
ivImage.setImageBitmap(bm);
}
Here, I get the correct image to show in ImageView ivImage in both take an image by camera or gallery. But I don't get the path correctly when I pick an image from Gallery(works fine when I take camera Image) which I save in database for further path retrieve.

how i can get this selected image path
For what feels like the 3,735th time, there is no "selected image path". You are getting a Uri back (data.getData()); a Uri does not have to point to a file. For example, http://stackoverflow.com/questions/44057912/not-getting-correct-path-when-select-image-from-gallery is a Uri; it does not represent a file on the filesystem.
If you want a file, use a file-picker library.

At last, I decided to do the same procedure what I did in Method "onCaptureImageResult(Intent data)". The image I get from the Gallery stored again to a directory.I know this is absolutely not the good procedure, but it solved my problem temporally until I get a good answer.
#SuppressWarnings("deprecation")
private void onSelectFromGalleryResult(Intent data) {
Bitmap bm=null;
if (data != null) {
try {
bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData());
} catch (IOException e) {
e.printStackTrace();
}
}
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File destination = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bm1 = BitmapFactory.decodeFile(destination.getAbsolutePath());
ivImage.setImageBitmap(bm1);
String selectedImageUri = data.getData().getPath();
showImagepathET.setText(destination.getAbsolutePath());
}

Android sending email with attachment

I was having some problem when trying to attach a generated QR code as attachment using email in Android Programming. Here is the part where I generate the QR code and then call the send email:
#SuppressLint("NewApi")
private void generateQR() {
// Find screen size
WindowManager manager = (WindowManager) getSystemService(WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
Point point = new Point();
display.getSize(point);
int width = point.x;
int height = point.y;
// Encode with a QR Code image
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(qrInputText, null,
Contents.Type.TEXT, BarcodeFormat.QR_CODE.toString(),
smallerDimension);
try {
Bitmap bitmap = qrCodeEncoder.encodeAsBitmap();
ImageView myImage = (ImageView) findViewById(R.id.ivImage);
myImage.setImageBitmap(bitmap);
new SendEmailAsyncTask().execute(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
}
class SendEmailAsyncTask extends AsyncTask <Bitmap, Void, Boolean> {
#Override
protected Boolean doInBackground(Bitmap... params) {
GMailSender sender = new GMailSender("something#gmail.com","pwd");
try {
sender.sendMail("Successful Event Registration QR Code",params[0], "something#gmail.com", "something#gmail.com");
System.out.println("send");
} catch (Exception e) {
System.err.println("err"+e);
Log.e("SendMail", e.getMessage(), e);
}
return null;
}
}
However, I am getting error message at the sendMail that line:
The method sendMail(String, String, String, String) in the type GMailSender is not applicable for the arguments (String, Bitmap, String, String)
Because previously when I replace the params[0], it was a string before that. But then I have to pass in the generated QR code bitmap into the email content. Any ideas?
Thanks in advance.
Update
Bitmap bitmap = qrCodeEncoder.encodeAsBitmap();
ImageView myImage = (ImageView) findViewById(R.id.ivImage);
myImage.setImageBitmap(bitmap);
counterQR++;
String path = Environment.getExternalStorageDirectory().toString();
OutputStream fOut = null;
File file = new File(path, "eNeighbourhood"+counterQR+".jpg");
fOut = new FileOutputStream(file);
Bitmap pictureBitmap = getImageBitmap(bitmap); // obtaining the Bitmap
pictureBitmap.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
fOut.flush();
fOut.close();
MediaStore.Images.Media.insertImage(getContentResolver(),file.getAbsolutePath(),file.getName(),file.getName());
With these code above, I am trying to convert bitmap into file so that I can modify the sendMail() by taking in file parameter as well. However, I am getting getImageBitmap is undefined for MainActivity

Unable to display image in imageview

I'm trying to display a image in the imageview.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView imageView = (ImageView)findViewById(R.id.imageView1);
try {
File imgFile = new File("C:\\photos\\a.jpg");
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
if (myBitmap == null) {
Log.e("BITMAP", "myBitmap is NULL");
}
imageView.setImageBitmap(myBitmap);
}catch (Exception e) {
e.printStackTrace();
}
}
I can see the error message "myBitmap is NULL".
Is there anything i need to do, to ensure the path is recognized.
Thanks!

The path "C:\\photos\\a.jpg" refers to a path in your Windows system, and this is invalid. Android doesn't know anything about Windows.
You need to put the file in your resources directory or your assets directory, and provide the path accordingly.

try this :
place image in assets folder and then:
private Bitmap getBitmapFromAsset(String strName)
{
AssetManager assetManager = getAssets();
InputStream istr = null;
try {
istr = assetManager.open(strName);
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bitmap = BitmapFactory.decodeStream(istr);
return bitmap;
}
and then set image Bitmap in imageView as:
imageView.setImageBitmap(getBitmapFromAsset("fileName"));
Or if image file is on SD card then try this :
File f = new File("/mnt/sdcard/photo.jpg");
Bitmap bmp = BitmapFactory.decodeFile(f.getAbsolutePath());
imageView.setImageBitmap(bmp);
hope this will help you.

Null Pointer Exception on Bitmap bitmap = content.getDrawingCache();

I'm trying to create an app which allows users to screenshot the current view. I'm using the following code to do so.
View content = ((Activity)ctx).findViewById(R.id.rootlayout);
Bitmap bitmap = content.getDrawingCache();
File file = new File("/sdcard/test.png");
try
{
file.createNewFile();
FileOutputStream ostream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 100, ostream);
ostream.close();
}
catch (Exception e)
{
e.printStackTrace();
}
However, i'm getting a Null Pointer Exception on the following line:
Bitmap bitmap = content.getDrawingCache();
What would this mean, that the view is empty?
Any help would be great!

You need to call content.setDrawingCacheEnabled(true); before you can use that. Then call content.setDrawingCacheEnabled(false); when you're done.