Question

On my on create function I give the location an ID. However my issue is when I go to add a photo to that page before I’ve saved it. I need to save the photo with the same ID as the page. So I create the ID on the on create then when i add a picture and come back as it’s loaded the other intent it runs the code again and creates a new ID. How can I pass the ID through the photo and back.

The variable checkStationObjectID is set at the top of the file.

Heres my on create:

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_asset);

        Bundle extras = getIntent().getExtras(); 
        Log.e("CamDebug", "Loading extras");
        if (extras != null) {   
            PreviousStationObjectID = extras.getString("StationObjectID");  
            editMode = extras.getBoolean("editMode");
            editAreaObjectID = extras.getString("editAreaObjectID");

        } 



        if(editMode){
            checkStationObjectID = editAreaObjectID;
             Log.e("CHECK ID - Edit mode", checkStationObjectID);

         } else {

            if(checkStationObjectID == null){
                checkStationObjectID = NewAssetStationObjectID;
                Log.e("CHECK ID = NEW ID", checkStationObjectID);
            } 

        }

       //Other items taken out



    }

I launch the camera with:

public void startCamera() 
{
    File photo = null;
    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
    timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());

    if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) 
               {
                   photo = new File(Global.Pictures + timestamp +".png");

               } 
    else 
               {
                   photo = new File(getCacheDir(), FOLDER_NAME+File.separator+timestamp+".png");
               }    
    if (photo != null) 
               {
                   intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
                   selectedImageUri = Uri.fromFile(photo);
                   startActivityForResult(intent, CAPTURE_IMAGE_CALLBACK);
               }

}

Answer 1

onCreate is called whenever your application is started. If you are calling another app like a camera, then the OS can kill your own Activity at any time while the camera Activity is running. This could be to recover memory or resources that the running app needs. Then when you exit the camera the OS will restart your Activity, which will call onCreate again.

I would suggest that you save the ID that you have generated into SharedPreferences just before you start the camera app. Then check for a saved ID in onActivityResult.