I am trying to capture camera photo in may app...
this is what I have:
The photo is saved but on the on Activity Result, I get Null point Exception.
What could I be possible missing out?
private Uri getImgUri() {
File filePath= new File(Environment.getExternalStoragePublicDirectory (Environment.DIRECTORY_PICTURES),APP_ALIAS);
if(!filePath.exists()){
if(!filePath.mkdirs())
return null;
}
String timeStamp= new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String path=filePath.getPath()+File.separator+"_IMG"+timeStamp+".jpg";
File file=new File(path);
return Uri.fromFile(file);
}
private void startGetPicFromCam() {
Intent intent= new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri uri= getImgUri();
intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
startActivityForResult(intent,MEDIA_CAPTURE_RESULT_CODE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// super.onActivityResult(requestCode, resultCode, data);
if(requestCode==MEDIA_CAPTURE_RESULT_CODE){
if(resultCode==RESULT_OK){
try{
if(data.getData()!=null)
Toast.makeText(this,"saved to "+data.getData(),Toast.LENGTH_LONG).show();
else
Toast.makeText(this,"saved to path",Toast.LENGTH_LONG).show();
}
catch(Exception e){
Toast.makeText(this,e.getMessage(),Toast.LENGTH_LONG).show();
}
}
}
}
Edit, it appears I didn't read your question close enough. It appears that the issue is that when you use EXTRA_OUTPUT, a null intent is passed back. If you want to get access to your data, just query the file that you passed in as an extra. See this and this question for more detailed information.
Related
I am writing an android application. This app is built on top of Gmail. I want to add the ability to attach files from other apps. The first app I am working on doing this with is a custom Box app (made with the box sdk). I can currently send an intent, open an activity in the Box app, pick an attachment, and return. However, in my Box-SDK app, once an item is selected, I have no idea how to turn it into data that I can properly send back to my Gmail app (or any original sender of the intent). I also do not know how to send that data back to the originator of the intent.
I know setResult() is involved, but I am not sure where to put it or how to properly use it to carry the data chosen in box into the email app.
What's currently happening is it just goes back into gmail without an attachment and says that the download has finished.
Here is the code I currently have:
private void onFileSelected(final int resultCode, final Intent data) {
if (Activity.RESULT_OK != resultCode) {
Toast.makeText(this, "fail", Toast.LENGTH_LONG).show();
}
else {
final BoxAndroidFile file = data.getParcelableExtra(FilePickerActivity.EXTRA_BOX_ANDROID_FILE);
AsyncTask<Null, Integer, Null> task = new AsyncTask<Null, Integer, Null>() {
#Override
protected void onPostExecute(Null result) {
Toast.makeText(MainActivity.this, "done downloading", Toast.LENGTH_LONG).show();
// Intent result2 = new Intent();
// result2.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + ));
// setResult(Activity.RESULT_OK, result2);
//// setResult(resultCode, data);
super.onPostExecute(result);
finish();
}
#Override
protected void onPreExecute() {
Toast.makeText(MainActivity.this, "start downloading", Toast.LENGTH_LONG).show();
super.onPreExecute();
}
#Override
protected Null doInBackground(Null... params) {
BoxAndroidClient client = ((HelloWorldApplication) getApplication()).getClient();
try {
File f = new File(Environment.getExternalStorageDirectory(), file.getName());
Intent result2 = new Intent();
result2.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + f.getAbsolutePath()));
setResult(Activity.RESULT_OK, data);
// setResult(resultCode, data);
System.out.println(f.getAbsolutePath());
client.getFilesManager().downloadFile(file.getId(), f, null, null);
}
catch (Exception e) {
}
return null;
}
};
task.execute();
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == AUTH_REQUEST) {
onAuthenticated(resultCode, data);
}
else if (requestCode == UPLOAD_REQUEST) {
onFolderSelected(resultCode, data);
}
else if (requestCode == DOWNLOAD_REQUEST) {
onFileSelected(resultCode, data);
}
}
Try using a file provider:
https://developer.android.com/reference/android/support/v4/content/FileProvider.html#ServeUri
From the page:
"There are a variety of ways to serve the content URI for a file to a client app. One common way is for the client app to start your app by calling startActivityResult(), which sends an Intent to your app to start an Activity in your app. In response, your app can immediately return a content URI to the client app or present a user interface that allows the user to pick a file. In the latter case, once the user picks the file your app can return its content URI. In both cases, your app returns the content URI in an Intent sent via setResult()"
From another stackoverflow answer:
public void showCameraScreen(View view) {
// BUILT IN CAMERA
Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
camera.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(this)) );
this.startActivityForResult(camera, 1);
}
private File getTempFile(Context context) {
// it will return /sdcard/MyImage.tmp
final File path = new File(Environment.getExternalStorageDirectory(), context.getPackageName());
if (!path.exists()) {
path.mkdir();
}
return new File(path, "MyImage.tmp");
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
final File file = getTempFile(this);
byte[] _data = new byte[(int) file.length()];
try {
InputStream in = new FileInputStream(file);
in.read(_data);
in.close();
in = null;
//DO WHAT YOU WANT WITH _data. The byte array of your image.
} catch (Exception E) {
}
}
}
We can modify this code, where it says //Do What you want with the _data, just call
public final void setResult (int resultCode, Intent data)
I'm switching from using the default camera to finally growing a pair and deciding to make a custom camera. It's only showing me how much I don't fully understand.
Here is basically way I have been doing things in the main activity as far as photos go, but it will no longer work:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uiHelper.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == PICK_PHOTO_REQUEST) {
if (data == null) {
Toast.makeText(this, "General Error!", Toast.LENGTH_LONG).show();
}
else {
mMediaUri = data.getData();
}
Log.i(TAG, "Media URI: " + mMediaUri);
}
else {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
mediaScanIntent.setData(mMediaUri);
sendBroadcast(mediaScanIntent);
}
(...)
Here is the picture saving function along with a couple others of the new camera:
(...)
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.d("Picture taken");
String path = savePictureToFileSystem(data);
setResult(path);
finish();
}
private static String savePictureToFileSystem(byte[] data) {
File file = getOutputMediaFile();
saveToFile(data, file);
return file.getAbsolutePath();
}
private void setResult(String path) {
Intent intent = new Intent();
intent.putExtra(EXTRA_IMAGE_PATH, path);
setResult(RESULT_OK, intent);
}
*Credit to Paul Blundell
(...)
What do I need to do so that the main activity can receive the image's URI in the onactivityresult instead of the path String? Are URIs even applicable when it comes to custom cameras?
Please and thanks.
You use custom camera, but want to do it via Intent? OK, you have the absolute file path in
String abspath = data.getExtras().getString(EXTRA_IMAGE_PATH);
mMediaUri = Uri.fromFile(new File(abspath));
I'm completely news on android thing and unfortunately with little few time to learn it by the right way, I have a work to release.
The problem is: I need to take a picture and process her with an algorithm that I made.
I did it by the easiest way that I could find, I know it looks like really trahsie for those who really get android (sorry)
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
takePic();
protected void takePic(){
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, 100);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Bundle extras = data.getExtras();
mImageBitmap = (Bitmap) extras.get("data");
Algorithm(mImageBitmap)
But it doesn't process, it takes a photo, ask to save or cancell and leaves the application, I have already made by different ways (creating a new activity), but nothing seems to work
Heres how I did it
To go to the camera:
Somewhere, declaire a fileUri variable and hold onto it
Uri fileUri;
final int TAKE_PICTURE=100;//this can be any int, really
public void goToCamera(){
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
File photo;
try
{
// place where to store camera taken picture
photo = this.createTemporaryFile("picture", ".jpg");
Log.v(TAG, "Here(after createTempFile)");
photo.delete();
}
catch(Exception e)
{
Log.v(TAG, "Can't create file to take picture!" + e.getMessage());
Toast.makeText(context, "Please check SD card!", Toast.LENGTH_SHORT).show();
return;
}
fileUri = Uri.fromFile(photo);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
//Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, TAKE_PICTURE);
}
Then to retreive the image
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK){
this.getContentResolver().notifyChange(uri, null);
ContentResolver cr = this.getContentResolver();
Bitmap bitmap;
try
{
BitmapFactory.Options ops = new BitmapFactory.Options();
ops.inSampleSize = 4;
bitmap = BitmapFactory.decodeFile(uri.getPath().toString(), ops);
}
catch (Exception e)
{
Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT).show();
Log.d(TAG, "Failed to load", e);
}
}
}
The create temp file mentioned above:
private File createTemporaryFile(String part, String ext) throws Exception
{
File tempDir= Environment.getExternalStorageDirectory();
tempDir=new File(tempDir.getAbsolutePath()+"/.temp/");
Log.i(TAG, tempDir.toString());
if(!tempDir.exists())
{
Log.i(TAG, "Dir doesnt exist");
tempDir.mkdirs();
}
return File.createTempFile(part, ext, tempDir);
}
I realize this isn't probably as simple as you were hoping for, but this approach seemed to be as flexible and compatible as possible. Let me know if I left anything else out
I just want to take a Foto with my cam -(that functions)
To use it further i need the path were the intent has saved the picture.
But I don't want to tell the Intent where it should put the File.
(Because now it just creates the file automatically.
Heres the function that starts the camera
public void doCam() {
Intent i = new Intent("android.media.action.IMAGE_CAPTURE");
// startActivityForResult(intent,0);
try {
startActivityForResult(i, TAKEPICTURE_ACTIVITY);
} catch (ActivityNotFoundException e) {
Toast.makeText(this, "Application not available",
Toast.LENGTH_SHORT).show();
}
// Log.e(TAG, "Error in taking picture");
}
and heres the getting of the results and I want in the string address the path with the name of the picture
I found different solutions already but the all involved choosing the filename before taking the picture -> so the app decided how the picutre will be named.
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == TAKEPICTURE_ACTIVITY) {
// super.onActivityResult(requestCode, resultCode, intent);
if (resultCode == RESULT_OK) {
Bundle extras = intent.getExtras();
Bitmap bitmap = (Bitmap) extras.get("data");
//doesn't work
String address= (String) extras.get("EXTRA_OUTPUT");
The path should be found in intent.getData() try it.. If you don't have it there then you should consider forcing the camera to save the video in a custom location..
This is how you can get the path of the recently captured image:
try{
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
} catch(Exception e){
e.printStackTrace();
}
And in the onActivityResult() method:
String path=null;
try{
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
path=getLastImagePath();
} catch(Exception e){
}
I'm trying to put extras (string) in an intent. I use startActivityForResult and onActivityResult to get my extras on the other side.
But I can't get why it doesn't works ! Here's my code :
buttonCamera.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra("abc", "test");
startActivityForResult(intent, PHOTO_RESULT);
}
});
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PHOTO_RESULT) {
if (resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
if (extras != null) {
String abc = extras.getString("abc");
Toast.makeText(getApplicationContext(), abc, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "can't get", Toast.LENGTH_SHORT).show();
}
}
}
}
I always get an empty toast, so the extra is not null.. But I cant't get the String..
Thanks !
edit:
To tell the camera the file name you can use this:
File mFile = new File(path, filename);
final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mFile));
activity.startActivityForResult(intent, TAKE_PHOTO_CODE);
The camera activity will get your extra intent data, but it won't return that "abc" string. You can't tell the camera activity to return "abc" for results. What are you trying to do with that abc string?
Obviously you will get an empty toast .
You are putting extra for the intent new Intent(MediaStore.ACTION_IMAGE_CAPTURE) and the Intent data you are getting in onActivity result is different , (Returned from Camera Activity ) .
so store value in a class variable will work fine .