I'm trying to capture image & display in imageview and pick image from gallery to image view. So, I have to different requestcodes but startactivityforresult deprecated, and so, ı use that:
ActivityResultLauncher<Intent> startActivityIntent = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
#Override
public void onActivityResult(ActivityResult result) {
// Add same code that you want to add in onActivityResult method
}
});
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA_PERM_CODE){
Toast.makeText(this, "2", Toast.LENGTH_SHORT).show();
File f = new File(currentPhotoPath);
selectedImage.setImageURI(Uri.fromFile(f));
Log.d("tag","Absolute Uri of Image is " + Uri.fromFile(f));
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);}
if(requestCode == GALLERY_PERM_CODE){
Toast.makeText(this, "3", Toast.LENGTH_SHORT).show();
Uri contentUri = data.getData();
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "." + getFileExt(contentUri);
Log.d("tag","Absolute Uri of Image is " + imageFileName);
selectedImage.setImageURI(contentUri);
}
}
How can I add requestcodes in ActivityResultLauncher? or are there other ways to do that?
Related
Before adding viewmodel & livedata , i successfully implemented infinity scroll with retrofit. But after adding viewmodel & livedata with Retrofit, My can't update recyclerview with new data call or viewmodel observer not update the list.
I simply want to infinite scrolling as my code does before. I add a global variable to reuse next page token. Am i missing anything or any sample to implement infinite recyclerview with viewmodel & retrofit will be awesome.
public static String NEXT_PAGE_URL = null;
I coded like that.
My Activity -> PlaceListActivity
placeRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
LogMe.d(tag, "onScrollStateChanged:: " + "called");
// check scrolling started or not
if (newState == AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
isScrolling = true;
}
}
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
LogMe.d(tag, "onScrolled:: " + "called");
super.onScrolled(recyclerView, dx, dy);
currentItem = layoutManager.getChildCount();
totalItems = layoutManager.getItemCount();
scrolledOutItems = ((LinearLayoutManager) recyclerView.getLayoutManager()).findFirstVisibleItemPosition();
LogMe.d(tag, "currentItem:: " + currentItem);
LogMe.d(tag, "totalItems:: " + totalItems);
LogMe.d(tag, "scrolledOutItems:: " + scrolledOutItems);
if (isScrolling && (currentItem + scrolledOutItems == totalItems)) {
LogMe.d(tag, "view:: " + "finished");
isScrolling = false;
if (ApplicationData.NEXT_PAGE_URL != null) {
LogMe.d(tag, "place adding:: " + " onScrolled called");
ll_loading_more.setVisibility(View.VISIBLE);
// todo: call web api here
callDataFromLocationAPi(type, ApplicationData.NEXT_PAGE_URL, currentLatLng);
} else {
LogMe.d(tag, "next_page_url:: " + " is null");
}
}
}
});
private void callDataFromLocationAPi(String type, String next_page_url, LatLng latLng) {
if (Connectivity.isConnected(activity)) {
showProgressDialog();
model.getNearestPlaces(type, next_page_url, latLng).
observe(activity, new Observer<List<PlaceDetails>>() {
#Override
public void onChanged(#Nullable List<PlaceDetails> placeDetails) {
ll_loading_more.setVisibility(View.GONE);
LogMe.i(tag, "callDataFromLocationAPi: onChanged called !");
hideProgressDialog();
if (placeDetails != null) {
placeDetailsList = placeDetails;
placeListAdapter.setPlaceList(placeDetails);
}
}
});
} else {
showAlertForInternet(activity);
}
}
In PlaceViewModel
public class PlaceViewModel extends AndroidViewModel {
//this is the data that we will fetch asynchronously
private MutableLiveData<List<PlaceDetails>> placeList;
private PlaceRepository placeRepository;
private String tag = getClass().getName();
public PlaceViewModel(Application application) {
super(application);
placeRepository = new PlaceRepository(application);
}
//we will call this method to get the data
public MutableLiveData<List<PlaceDetails>> getNearestPlaces(String type,
String next_page_token,
LatLng latLng) {
//if the list is null
if (placeList == null) {
placeList = new MutableLiveData<>();
//we will load it asynchronously from server in this method
//loadPlaces(type, next_page_token, latLng);
placeList = placeRepository.getNearestPlacesFromAPI(type, next_page_token, latLng);
}
//finally we will return the list
return placeList;
}
}
In my PlaceRepository.java looks
public class PlaceRepository {
private static final Migration MIGRATION_1_2 = new Migration(1, 2) {
#Override
public void migrate(SupportSQLiteDatabase database) {
// Since we didn't alter the table, there's nothing else to do here.
}
};
private PlaceDatabase placeDatabase;
private CurrentLocation currentLocation = null;
private String tag = getClass().getName();
//this is the data that we will fetch asynchronously
private MutableLiveData<List<PlaceDetails>> placeList;
public PlaceRepository(Context context) {
placeDatabase = PlaceDatabase.getDatabase(context);
//addMigrations(MIGRATION_1_2)
placeList =
new MutableLiveData<>();
}
public MutableLiveData<List<PlaceDetails>> getNearestPlacesFromAPI(String type, final String next_page_token, LatLng latLng) {
List<PlaceDetails> placeDetailsList = new ArrayList<>();
try {
ApiInterface apiService = ApiClient.getClient().create(ApiInterface.class);
Call<Example> call = apiService.getNearbyPlaces(type,
latLng.latitude + "," +
latLng.longitude, ApplicationData.PROXIMITY_RADIUS,
ApplicationData.PLACE_API_KEY, next_page_token);
call.enqueue(new Callback<Example>() {
#Override
public void onResponse(Call<Example> call, Response<Example> response) {
try {
Example example = response.body();
ApplicationData.NEXT_PAGE_URL = example.getNextPageToken();
// next_page_url = example.getNextPageToken();
LogMe.i(tag, "next_page_url:" + ApplicationData.NEXT_PAGE_URL);
if (example.getStatus().equals("OK")) {
LogMe.i("getNearbyPlaces::", " --- " + response.toString() +
response.message() + response.body().toString());
// This loop will go through all the results and add marker on each location.
for (int i = 0; i < example.getResults().size(); i++) {
Double lat = example.getResults().get(i).getGeometry().getLocation().getLat();
Double lng = example.getResults().get(i).getGeometry().getLocation().getLng();
String placeName = example.getResults().get(i).getName();
String vicinity = example.getResults().get(i).getVicinity();
String icon = example.getResults().get(i).getIcon();
String place_id = example.getResults().get(i).getPlaceId();
PlaceDetails placeDetails = new PlaceDetails();
if (example.getResults().get(i).getRating() != null) {
Double rating = example.getResults().get(i).getRating();
placeDetails.setRating(rating);
}
//List<Photo> photoReference = example.getResults().
// get(i).getPhotos();
placeDetails.setName(placeName);
placeDetails.setAddress(vicinity);
placeDetails.setLatitude(lat);
placeDetails.setLongitude(lng);
placeDetails.setIcon(icon);
placeDetails.setPlace_id(place_id);
//placeDetails.setPlace_type(place_type_title);
double value = ApplicationData.
DISTANCE_OF_TWO_LOCATION_IN_KM(latLng.latitude, latLng.longitude, lat, lng);
//new DecimalFormat("##.##").format(value);
placeDetails.setDistance(new DecimalFormat("##.##").format(value));
String ph = "";
if (example.getResults().
get(i).getPhotos() != null) {
try {
List<Photo> photos = example.getResults().
get(i).getPhotos();
//JSONArray array = new JSONArray(example.getResults().
//get(i).getPhotos());
//JSONObject jsonObj = new JSONObject(array.toString());
//ph = jsonObj.getString("photo_reference");
ph = photos.get(0).getPhotoReference();
//LogMe.i(tag, "\n" + ph);
} catch (Exception e) {
e.printStackTrace();
//placeDetails.setPicture_reference(ph);
//PLACE_DETAILS_LIST.add(placeDetails);
//LogMe.i(tag, "#### Exception Occureed ####");
ph = "";
//continue;
}
}
placeDetails.setPicture_reference(ph);
placeDetailsList.add(placeDetails);
placeList.postValue(placeDetailsList);
}
} else {
}
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Call<Example> call, Throwable t) {
Log.e("onFailure", t.toString());
}
});
} catch (RuntimeException e) {
//hideProgressDialog();
Log.d("onResponse", "RuntimeException is an error");
e.printStackTrace();
} catch (Exception e) {
Log.d("onResponse", "Exception is an error");
}
return placeList;
}
}
I precise code due to question simplicity.
Though you already use android-jetpack, take a look at Paging library. It's specially designed for building infinite lists using RecyclerView.
Based on your source code, I'd say that you need PageKeyedDataSource, here is some example which includes info about how to implement PageKeyedDataSource -
7 steps to implement Paging library in Android
If talking about cons of this approach:
You don't need anymore to observe list scrolling (library doing it for you), you just need to specify your page size in the next way:
PagedList.Config myPagingConfig = new PagedList.Config.Builder()
.setPageSize(50)
.build();
From documentation:
Page size: The number of items in each page.
Your code will be more clear, you'll get rid of your RecyclerView.OnScrollListener
ViewModel code will be shorter, it's will provide only PagedList:
#NonNull
LiveData<PagedList<ReviewSection>> getReviewsLiveData() {
return reviewsLiveData;
}
I have this quite simple app, to upload pictures to Firebase directly from camera, written following the original documentation from Android developpers page. It works very well on emulators, but on my Galaxy S4 it crashes. The variable imageFileName gets null on onActivityResult, but only in GS4. Here is what is get in emulators:
I/TAG 0:: FILENAME JPEG_20170420_005617_
I/TAG 1:: FILENAME JPEG_20170420_005617_
And here is what is get in GS4:
I/TAG 0:: FILENAME JPEG_20170420_005617_
I/TAG 1:: FILENAME null
Why it gets null out of nothing? Why on S4? Without this value I cant putFile to Firebase. Only with GS4.
Thanks for your help.
private FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();
private StorageReference mStorage;
private Button mSelect, mCam;
public Uri uri, photoURI;
private String imageFileName;
private ProgressDialog mProgressDialog;
private static final int GALLERY_INTENT = 2;
private static final int CAMERA_REQUEST_CODE = 1;
static final int REQUEST_TAKE_PHOTO = 1;
String mCurrentPhotoPath;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mStorage = FirebaseStorage.getInstance().getReference();
mSelect = (Button) findViewById(R.id.first_but);
mCam = (Button) findViewById(R.id.sec_but);
mProgressDialog = new ProgressDialog(this);
mCam.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//startActivityForResult(intent, CAMERA_REQUEST_CODE);
dispatchTakePictureIntent();
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
Log.i("TAG 1: ", "FILENAME " + imageFileName);
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
Log.i("TAG 0: ", "FILENAME " + imageFileName);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
Weirdly, what solved the probem was adding this to AdroidManifest.xml
<activity
android:name=".YourActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:screenOrientation="portrait" >
</activity>
Thanks to #Janine Kroser
original post: Photo capture Intent causes NullPointerException on Samsung phones only
I still would like some explanation to that, other than "Samsung is weird". Is it possible that the orientation change would destroy some activity containing data?
I use wifidirect to send file,but I can't get the file name(include .jpg or .mp3),and sent it,it always null.
i'm using wifidirect demo provided Android Developers
I use
File f = new File(uri.getPath());
fileName = f.getName();
and
final File f = new File(Environment.getExternalStorageDirectory() + "/"
+ "Wifidirect" + "/" + fileName);
but fileName is alwas null
public class DeviceDetailFragment extends Fragment implements ConnectionInfoListener {
protected static final int CHOOSE_FILE_RESULT_CODE = 20;
private View mContentView = null;
private WifiP2pDevice device;
private WifiP2pInfo info;
//private static WiFiDirectBundle bundle = new WiFiDirectBundle();
ProgressDialog progressDialog = null;
private static String fileName;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mContentView = inflater.inflate(R.layout.device_detail, null);
mContentView.findViewById(R.id.btn_connect).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
WifiP2pConfig config = new WifiP2pConfig();
config.deviceAddress = device.deviceAddress;
config.wps.setup = WpsInfo.PBC;
config.groupOwnerIntent = 15;
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
progressDialog = ProgressDialog.show(getActivity(), "Press back to cancel",
"Connecting to :" + device.deviceAddress, true, true
// new DialogInterface.OnCancelListener() {
//
// #Override
// public void onCancel(DialogInterface dialog) {
// ((DeviceActionListener) getActivity()).cancelDisconnect();
// }
// }
);
((DeviceActionListener) getActivity()).connect(config);
}
});
mContentView.findViewById(R.id.btn_disconnect).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
((DeviceActionListener) getActivity()).disconnect();
}
});
mContentView.findViewById(R.id.btn_start_client).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
// Allow user to pick an image from Gallery or other
// registered apps
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CHOOSE_FILE_RESULT_CODE);
}
});
return mContentView;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// User has picked an image. Transfer it to group owner i.e peer using
// FileTransferService.
Uri uri = data.getData();
File f = new File(uri.getPath());
fileName = f.getName();
TextView statusText = (TextView) mContentView.findViewById(R.id.status_text);
statusText.setText("Sending: " + uri);
Log.d(WiFiDirectActivity.TAG, "Intent----------- " + uri);
Intent serviceIntent = new Intent(getActivity(), FileTransferService.class);
serviceIntent.setAction(FileTransferService.ACTION_SEND_FILE);
serviceIntent.putExtra(FileTransferService.EXTRAS_FILE_PATH, uri.toString());
serviceIntent.putExtra(FileTransferService.EXTRAS_GROUP_OWNER_ADDRESS,
info.groupOwnerAddress.getHostAddress());
serviceIntent.putExtra(FileTransferService.EXTRAS_GROUP_OWNER_PORT, 8988);
getActivity().startService(serviceIntent);
}
#Override
public void onConnectionInfoAvailable(final WifiP2pInfo info) {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
this.info = info;
this.getView().setVisibility(View.VISIBLE);
// The owner IP is now known.
TextView view = (TextView) mContentView.findViewById(R.id.group_owner);
view.setText(getResources().getString(R.string.group_owner_text)
+ ((info.isGroupOwner == true) ? getResources().getString(R.string.yes)
: getResources().getString(R.string.no)));
// InetAddress from WifiP2pInfo struct.
view = (TextView) mContentView.findViewById(R.id.device_info);
view.setText("Group Owner IP - " + info.groupOwnerAddress.getHostAddress());
// After the group negotiation, we assign the group owner as the file
// server. The file server is single threaded, single connection server
// socket.
if (info.groupFormed && info.isGroupOwner) {
new FileServerAsyncTask(getActivity(), mContentView.findViewById(R.id.status_text))
.execute();
} else if (info.groupFormed) {
// The other device acts as the client. In this case, we enable the
// get file button.
mContentView.findViewById(R.id.btn_start_client).setVisibility(View.VISIBLE);
((TextView) mContentView.findViewById(R.id.status_text)).setText(getResources()
.getString(R.string.client_text));
}
// hide the connect button
mContentView.findViewById(R.id.btn_connect).setVisibility(View.GONE);
}
/**
* Updates the UI with device data
*
* #param device the device to be displayed
*/
public void showDetails(WifiP2pDevice device) {
this.device = device;
this.getView().setVisibility(View.VISIBLE);
TextView view = (TextView) mContentView.findViewById(R.id.device_address);
view.setText(device.deviceAddress);
view = (TextView) mContentView.findViewById(R.id.device_info);
view.setText(device.toString());
}
/**
* Clears the UI fields after a disconnect or direct mode disable operation.
*/
public void resetViews() {
mContentView.findViewById(R.id.btn_connect).setVisibility(View.VISIBLE);
TextView view = (TextView) mContentView.findViewById(R.id.device_address);
view.setText(R.string.empty);
view = (TextView) mContentView.findViewById(R.id.device_info);
view.setText(R.string.empty);
view = (TextView) mContentView.findViewById(R.id.group_owner);
view.setText(R.string.empty);
view = (TextView) mContentView.findViewById(R.id.status_text);
view.setText(R.string.empty);
mContentView.findViewById(R.id.btn_start_client).setVisibility(View.GONE);
this.getView().setVisibility(View.GONE);
}
/**
* A simple server socket that accepts connection and writes some data on
* the stream.
*/
public static class FileServerAsyncTask extends AsyncTask<Void, Void, String> {
private Context context;
private TextView statusText;
//String FileName = "bundle.fileName";
/**
* #param context
* #param statusText
*/
public FileServerAsyncTask(Context context, View statusText) {
this.context = context;
this.statusText = (TextView) statusText;
}
#Override
protected String doInBackground(Void... params) {
try {
ServerSocket serverSocket = new ServerSocket(8988);
Log.d(WiFiDirectActivity.TAG, "Server: Socket opened");
Socket client = serverSocket.accept();
Log.d(WiFiDirectActivity.TAG, "Server: connection done");
/*final File f = new File(Environment.getExternalStorageDirectory() + "/"
+ "Wifidirect" + "/wifip2pshared-" + System.currentTimeMillis()
+ ".jpg");*/
final File f = new File(Environment.getExternalStorageDirectory() + "/"
+ "Wifidirect" + "/" + fileName);
File dirs = new File(f.getParent());
if (!dirs.exists())
dirs.mkdirs();
f.createNewFile();
Log.d(WiFiDirectActivity.TAG, "server: copying files " + f.toString());
InputStream inputstream = client.getInputStream();
copyFile(inputstream, new FileOutputStream(f));
serverSocket.close();
return f.getAbsolutePath();
} catch (IOException e) {
Log.e(WiFiDirectActivity.TAG, e.getMessage());
return null;
}
}
/*
* (non-Javadoc)
* #see android.os.AsyncTask#onPostExecute(java.lang.Object)
*/
#Override
protected void onPostExecute(String result) {
if (result != null) {
statusText.setText("File copied - " + result);
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + result), "image/*");
context.startActivity(intent);
}
}
/*
* (non-Javadoc)
* #see android.os.AsyncTask#onPreExecute()
*/
#Override
protected void onPreExecute() {
statusText.setText("Opening a server socket");
}
}
public static boolean copyFile(InputStream inputStream, OutputStream out) {
byte buf[] = new byte[1024];
int len;
try {
while ((len = inputStream.read(buf)) != -1) {
out.write(buf, 0, len);
}
out.close();
inputStream.close();
} catch (IOException e) {
Log.d(WiFiDirectActivity.TAG, e.toString());
return false;
}
return true;
}
}
File f = new File(uri.getPath());
fileName = f.getName();
This part of code in your app will get executed - if device acts as client
and
final File f = new File(Environment.getExternalStorageDirectory() + "/"
+ "Wifidirect" + "/" + fileName);
this part of code in your app will get executed - if device acts as server (in this case GO) but fileName is always null
Since filename is initialized to "null" , on the server device this will be null.
FileServerAsyncTask is created only on GO( server ) as per the code.
In android sample code file transfer is working only from client to server. In this code user can do file sharing in both directions i.e client to server as well as server to client.
You can see this link.
How can I transfer files between Android devices using Wi-Fi Direct?
I have a custom OpenCV camera activity that takes a photo when the screen is tapped. The activity is started with a startActivityForResult intent, and the filepath of the photo is handed back to the MainActivity after the activity is finished. However, the camera saves the photo asynchronously and therefore the filepath shouldn't be checked until the photo is taken. I am using the filepath to set an imageView, and calling it immediately gives an empty image. I have managed to make it work by using Thread.sleep(3000); but this is a horrible option as it just stalls the UI which, as I've read countless times, is a big no no! Is there a way I can wait until the photo is saved before calling the return to MainActivity intent? I understand there is a callback from the camera but I don't understand how it works or how to use it, perhaps that is the best way to go?
Here's some code anyway.
in MainActivity extends FragmentActivity:
rootView.findViewById(R.id.button_start_camera).setOnClickListener(new View.OnClickListener() {
// Listen for Take Photo button Click, start app's openCV camera
#Override
public void onClick(View view) {
// Start Camera app
Intent intentCamera = new Intent(getActivity(), CameraActivity.class);
startActivityForResult(intentCamera, 2);
}
});
In CameraActivity extends Activity implements CvCameraViewListener2, OnTouchListener:
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.i(TAG,"onTouch event");
if (takePicture) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd-HHmmss");
String currentDateandTime = sdf.format(new Date());
fileName = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath() +
"/MatCom_" + currentDateandTime + ".jpg";
mOpenCvCameraView.takePicture(fileName);
Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Intent returnIntent = new Intent();
returnIntent.putExtra("result", fileName);
setResult(RESULT_OK, returnIntent);
finish();
}
return false;
}
And then back to MainActivity:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent)
{
super.onActivityResult(requestCode, resultCode, intent);
Log.i(TAG, "onActivityResult. resultCode = " + requestCode);
if (requestCode == 1) {//My other startActivityForResult...}
if (requestCode == 131074 && resultCode == RESULT_OK){
Bundle bundle = intent.getExtras();
filepath = bundle.getString("result");
Log.i(TAG, filepath);
imageView = (ImageView) findViewById(R.id.imageView);
bmp = BitmapFactory.decodeFile(filepath);
imageView.setBackgroundResource(0);
imageView.setImageBitmap(bmp);
}
}
NOTICE: As an aside, for some reason my requestCode comes back as 131074 every time despite setting it at 2 for the startActivityForResult - let me know if you know why that is.
Finally, in case it's necessary to see, here's the takePicture method from the CameraView class:
public void takePicture(final String fileName) {
Log.i(TAG, "Taking picture");
PictureCallback callback = new PictureCallback() {
private String mPictureFileName = fileName;
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.i(TAG, "Saving a bitmap to file");
Bitmap picture = BitmapFactory.decodeByteArray(data, 0, data.length);
try {
FileOutputStream out = new FileOutputStream(mPictureFileName);
picture.compress(Bitmap.CompressFormat.JPEG, 90, out);
picture.recycle();
// Open the image for analysis
// Read in the image from the file
Mat mOriginalImage = Highgui.imread(fileName);
// Only process the image if it actually exists!
if (mOriginalImage != null) {
// Find the size of the image
org.opencv.core.Size mSizeReadImage = mOriginalImage.size();
// From the number of rows and columns get the coordinates of the largest possible centralised square
double height = mSizeReadImage.height;
double width = mSizeReadImage.width;
double minDim = Math.min(height, width);
double top = height/2.0 - 2.0*minDim/5.0;
double left = width/2.0 - 2.0*minDim/5.0;
// Create a submat of the image based on the centralised square
Mat mOriginalImageSubmat = mOriginalImage.submat((int)Math.round(top), (int)Math.round(top + 4.0*minDim/5.0), (int)Math.round(left), (int)Math.round(left + 4.0*minDim/5.0));
// Create another Mat the required size but same type as mOriginalImageSubmat and resize mOriginalImageSubmat to fit into it
Mat mDrawableSubmat = new Mat(new Size(480.0, 480.0), mOriginalImageSubmat.type());
Imgproc.resize(mOriginalImageSubmat, mDrawableSubmat, mDrawableSubmat.size());
Mat mColourSourceSubmat = mDrawableSubmat.clone();
Mat mCannyOutput = mDrawableSubmat.clone();
double minLineLength = 300.0;
ColourMatrix matrix = new ColourMatrix();
matrix.setColourMatch(colourMatch);
matrix.setColourOrder(colourOrder);
matrix.setComparison(comparison);
matrix.setDisplayHotspots(displayHotspots);
matrix.setDisplayOutline(displayOutline);
matrix.setIntensity(intensity);
matrix.setMatrixType(matrixType);
String output = matrix.decode(mColourSourceSubmat, mCannyOutput, mDrawableSubmat, minLineLength);
Log.i(TAG, "DJH - decoded: " + output);
}
mCamera.startPreview();
} catch (Exception e) {
e.printStackTrace();
}
}
};
mCamera.takePicture(null, null, callback);
}
Thread.sleep isn't bad per se. You can use a loop to 30 with thread.sleep(100). Then you'll only be pausing .1 second at a time, and the CPU still won't spike.
i just need to find the current location on maps using WIFI.I used tha below code to do that.
My code:
public class LocationActivity extends MapActivity implements LocationListener {
private MapView mapView;
private LocationManager locationManager;
private String latitude,longtitude;
#Override
protected boolean isRouteDisplayed() {
return false;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = this.getIntent().getExtras();
latitude = bundle.getString("latitude");
longtitude = bundle.getString("longtitude");
setContentView(R.layout.locationtab);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
locationIdentifier();
}
private void createMyLocOverlay(Double latitude, Double longtitude) {
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(
R.drawable.mylocation);
GeoPoint point = new GeoPoint((int) (latitude * 1E6),
(int) (longtitude * 1E6));
OverlayItem overlayitem = new OverlayItem(point, null, "You are here!");
MyLocationOverlay itemizedoverlay = new MyLocationOverlay(drawable,
this);
itemizedoverlay.addOverlay(overlayitem);
MyLocationOverlay overlayToRemove = null;
for (Overlay overlay : mapOverlays) {
if (overlay instanceof MyLocationOverlay) {
overlayToRemove = (MyLocationOverlay) overlay;
}
}
if (overlayToRemove != null) {
mapOverlays.remove(overlayToRemove);
}
mapOverlays.add(itemizedoverlay);
}
public void locationIdentifier() {
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(criteria,true);
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
createMyLocOverlay(location.getLatitude(), location.getLongitude());
Toast.makeText(
this,
"Latitude : " + location.getLatitude() + " : Longtitude : "
+ location.getLongitude(), Toast.LENGTH_LONG)
.show();
} else {
Toast.makeText(this, "Latitude/Longtitude not found",
Toast.LENGTH_LONG).show();
}
}
#Override
public void onLocationChanged(Location location) {
if (location != null) {
createMyLocOverlay(location.getLatitude(), location.getLongitude());
Toast.makeText(
this,
"LocationChanged Latitude : " + location.getLatitude()
+ " Longtitude : " + location.getLongitude(),
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Location is null", Toast.LENGTH_LONG).show();
}
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider, Toast.LENGTH_LONG)
.show();
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_LONG).show();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
How could i check it on emulator whether its working or not.?
For now, It is not possible to simulate it using emulator because it is simply doesn't support it. As alternative, you may put a flag constant (e.g. DEBUG=false/true) then if DEBUG=true, use the constant location otherwise use WIFI location.
Or use location provider which can support IP Address location. Which you can use as alternative if DEBUG=true.