Develop Reference

Why Camera activity returning null?

I used below codes for taking image from camera and put it in Image View (imgViewAds).
private void BtnPhoto_Click(object sender, EventArgs e)
{
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.SetVmPolicy(builder.Build());
Intent cameraIntent = new Intent(Android.Provider.MediaStore.ActionImageCapture);
var activities = PackageManager.QueryIntentActivities(cameraIntent, 0);
if (activities.Count > 0)
{
addAds.ImageName = Guid.NewGuid().ToString() + ".jpg";
Java.IO.File imageFile = new Java.IO.File(AdsAdapter.ImagePath(addAds.ImageName));
Android.Net.Uri imageUri = Android.Net.Uri.FromFile(imageFile);
cameraIntent.PutExtra(MediaStore.ExtraSizeLimit, 1024*10);
cameraIntent.PutExtra(MediaStore.ExtraOutput, imageUri);
StartActivityForResult(cameraIntent, 0);
}
else
{
Toast.MakeText(this, "Not Camera", ToastLength.Long).Show();
}
}
And here is OnActivityResult the the camare send result here.
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
if (resultCode == Result.Ok && (data != null))
{
Bundle extras = data.Extras;
Bitmap imageBitmap = (Bitmap)extras.Get("data");
imgViewAds.SetImageBitmap(imageBitmap);
MemoryStream stream = new MemoryStream();
imageBitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
addAds.AdsImage = stream.ToArray();
}
base.OnActivityResult(requestCode, resultCode, data);
}
but the data that sending to OnActivityResult is null and Image did not come to Image View.

When you pass EXTRA_OUTPUT with a URI to write to, the camera intent will be null and the picture is in the URI that you passed in.
so you could simply remove these two lines:
Android.Net.Uri imageUri = Android.Net.Uri.FromFile(imageFile);
cameraIntent.PutExtra(MediaStore.ExtraOutput, imageUri);
note that in this way you get the thumbnail of the image. so if you want the whole image you could use something like this (I haven't tested the code, but you could get the idea):
if (requestCode == CAMERA_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
addAds.ImageName = Guid.NewGuid().ToString() + ".jpg";
Java.IO.File imageFile = new Java.IO.File(AdsAdapter.ImagePath(addAds.ImageName));
Uri uri = Uri.fromFile(file);
Bitmap bitmap;
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
bitmap = cropAndScale(bitmap, 300); // if you mind scaling
profileImageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

Capture from camera Image is not clear(Blurry) in Android

I Have a Problem with the Camera Capture Image.its set blurry.
I searched lots of but i can't Get Solutions
I don't know How to solve issue
Here is My Code Which i Used For Camera Capture Image
private void cameraIntent()
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
///method to get Images
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_CAMERA);
} else {
if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
Toast.makeText(context, "Your Permission is needed to get access the camera", Toast.LENGTH_LONG).show();
}
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 1);
}
} else {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_CAMERA);
}
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == SELECT_FILE)
onSelectFromGalleryResult(data);
else if (requestCode == REQUEST_CAMERA)
onCaptureImageResult(data);
}
}
private void onCaptureImageResult(Intent data) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
byte[] imageInByte = bytes.toByteArray();
long lengthbmp = imageInByte.length;
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();
}
iv_upld.setImageBitmap(thumbnail);
}

Android get filesize after take camera?

How can i get file size after take camera.
I run the code the following results:filesize is 0.I think that the Camera InputStream is writing.But how can I get the real file size?
private void takeCamera(){
file = File.createTempFile("tp_", ".jpg", dir);
filePathCamera = file.getAbsolutePath();
Uri uri = Uri.fromFile(file);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(intent, REQUEST_CODE_CAMERA);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case REQUEST_CODE_CAMERA:
final File file = new File(filePathCamera);
if (!file.exists()) {
result.append("not exists\n");
return;
}
InputStream inputStream = null;
try {
inputStream = new FileInputStream(filePathCamera);
long size = inputStream.available();
result.append("size1:" + size + "\n");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (IOException ioe) {
ioe.printStackTrace();
// ignore
}
}
break;
}
}
}

In onActivityResult in case REQUEST_CODE_CAMERA: after checking if !file.exists() you can check in else part file.length which will give you size of file.

Android: Resolution issue while saving image into gallery

I've managed to programmatically take a photo from the camera, then display it on an imageview, and then after pressing a button, saving it on the Gallery.
It works, but the problem is that the saved photo are low resolution.. WHY?!
I took the photo with this code:
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
Then I save the photo on a var using :
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
thumbnail = (Bitmap) data.getExtras().get("data");
}
}
and then after displaying it on an imageview, I save it on the gallery with this function:
public void SavePicToGallery(Bitmap picToSave, File savePath){
String JPEG_FILE_PREFIX= "PIC";
String JPEG_FILE_SUFFIX= ".JPG";
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = JPEG_FILE_PREFIX + timeStamp + "_";
File filePath = null;
try {
filePath = File.createTempFile(imageFileName, JPEG_FILE_SUFFIX, savePath);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
FileOutputStream out = null;
try {
out = new FileOutputStream(filePath);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
picToSave.compress(CompressFormat.JPEG, 100, out);
try {
out.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Add the pic to Android Gallery
String mCurrentPhotoPath = filePath.getAbsolutePath();
MediaScannerConnection.scanFile(this,
new String[] { mCurrentPhotoPath }, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
}
});
}
I really can't figure out why it lose so much quality while saved..
Any help please ? Thanks..

The photo you are displaying in the ImageView is a thumbnail :
data.getExtras().get("data");
Are you calling the method :
public void SavePicToGallery(Bitmap picToSave, File savePath)
with the thumbnail ?
Here you have all the steps describe to do what you want :
http://developer.android.com/training/camera/photobasics.html

data.getExtras().get("data") only get thumbnail.
To do it properly, you have to declare global uri variable
Uri imageCapturedUri ;
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
imageCaptureUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageCaptureUri);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
// mImageCaptureUri is your Uri
}
}

camera activity gives null pointer exception

in my camera intent:
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
this part gives me a null pointer exception.
can anyone explain why and what need to be changed??
button_1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
startActivityForResult(intent, TAKE_PICTURE);
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// Image captured and saved to fileUri specified in the Intent
Toast.makeText(this, "Image saved to:\n" +
data.getData(), Toast.LENGTH_LONG).show();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the image capture
} else {
// Image capture failed, advise user
}
}
}

Try the following,
public class Camera extends Activity
{
private static final int CAMERA_REQUEST = 1888;
private String selectedImagePath;
WebView webview;
String fileName = "capturedImage.jpg";
private static Uri mCapturedImageURI;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Intent cameraIntent = new Intent(ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK) {
if (requestCode == CAMERA_REQUEST)
{
Bitmap photo = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
Random randomGenerator = new Random();randomGenerator.nextInt();
String newimagename=randomGenerator.toString()+".jpg";
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + newimagename);
try {
f.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//write the bytes in file
try {
fo = new FileOutputStream(f.getAbsoluteFile());
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fo.write(bytes.toByteArray());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
uri=f.getAbsolutePath();
//this is the url that where you are saved the image
}
}