I try to create synchronized threads, but I always get the following error: android.os.NetworkOnMainThreadException.
I've read more posts, but they don't work for me.
Below I write the code blocks that do not work for me:
1.
final SyncApp syncJob = new SyncApp();
Thread t = new Thread (new Runnable () {
#Override
public void run () {
synchronized (syncJob) {
String s = syncJob.insert (newJobs, GlobalVariables.URL_LOCALHOST + "jobs");
txtState.setText (s);
}}});
}
});
t.Start ();
// t.run ();
2.
myClass.runOnUiThread(new Runnable() {
public void run() {...}
})
3.
Running code in main thread from another thread
SyncApp:
public class SyncApp {
synchronized public String insert(List<Jobs> job, String... params) {
URL url = null;
HttpURLConnection conn = null;
try {
url = new URL(params[0]);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
conn.setDoInput(true);
conn.setDoOutput(true);
String str = new Gson().toJson(job);
byte[] outputInBytes = str.getBytes();
OutputStream os = conn.getOutputStream();
os.write( outputInBytes );
os.flush();
int responseCode=conn.getResponseCode();
String response = null;
if (responseCode == HttpsURLConnection.HTTP_OK) {
String line;
BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((line=br.readLine()) != null) {
response+=line;
}
}
else {
response=conn.getResponseMessage();
}
return response;
} catch (Exception e) {
e.printStackTrace();
} finally {
conn.disconnect();
}
return null;
}
}
I need to call a thread, wait for the answer and call another thread. Their answers I must use them in the activity
I need to call a thread, wait for the answer and call another thread.
Their answers I must use them in the activity
Example using async tasks to accomplish objective.
In this code, let A be your activity which needs to call a thread,
wait for the answer and call another thread. Customize as needed.
Since you never wait in UI threads, callbacks are used to accomplish synchronization.
Let A be your activity class:
public class A extends Activity {
// some method in activity where you launch a background thread (B)
// which then completes and invokes callback which then creates and launches
// a background thread (C) which then completes and invokes a callback.
//
// In callback C, you are on the UI thread.
protected void someMethod() {
new B(new B.CallbackB() {
public void result(Object o) {
new C(new C.CallbackC() {
public void result(Object o, Object answerFromB) {
// OK - C is now done and we are on UI thread!
// 'o' is answer from C
// 'answerFromB' also provided
}
}, o).execute(new Object());
}
).execute(new Object());
}
}
Define a class B:
public class B extends AsyncTask<Object, Void, Object> {
public static interface CallbackB {
void result(Object o);
}
private CallbackB cb;
public B (CallbackB cb) {
this.cb = cb;
}
protected Object doInBackground(Object... params) {
// do work and return an answer.
return new Object();
}
protected void onPostExecute(Object result) {
if (cb != null) {
cb.result(result);
}
}
}
Define a class C:
public class C extends AsyncTask<Object, Void, Object> {
public static interface CallbackC {
void result(Object o, Object answerFromB);
}
private CallbackC cb;
private Object answerFromB;
public C (CallbackC cb, Object answerFromB) {
this.cb = cb;
this.answerFromB = answerFromB;
}
protected Object doInBackground(Object... params) {
// do work and return an answer.
return new Object();
}
protected void onPostExecute(Object result) {
if (cb != null) {
cb.result(result, answerFromB);
}
}
}
For reference:
https://stackoverflow.com/a/9963705/2711811
My solution is:
public class Sync extends AppCompatActivity {
...
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sync_server);
dao = new DAO(this);
txtState = findViewById(R.id.txt_log);
btnSincro = findViewById(R.id.btn_sincro);
btnSincro.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countCall = 0;
callFlow();
}
});
btnHome = findViewById(R.id.btn_home);
btnHome.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(SyncServerActivity.this, MainActivity.class);
startActivity(intent);
}
});
}
private void callFlow() {
switch (countCall) {
case 0:
templates = toTemplate("url");
break;
case 1:
jobs = toJobs("url");
break;
case 2:
job = ... //select item
res = sendJobs(jobs, "url");
break;
default:
runOnUiThread(new Runnable() {
#Override
public void run() {
btnSincro.setEnabled(true);
txtState.append("\n\nEND");
}
});
}
}
private void nextStep() {
setText(txtState, "\nSync \n" + countCall + "/3");
countCall++;
callFlow();
}
private void setText(final TextView text, final String value) {
runOnUiThread(new Runnable() {
#Override
public void run() {
text.setText(value);
}
});
}
public List<Templates> toTemplate(final String... params) {
final List<Templates> list = new ArrayList<>();
Thread t = new Thread(new Runnable() {
#Override
public void run() {
URL url = null;
BufferedReader reader = null;
HttpURLConnection connection = null;
try {
url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
int responseCode = connection.getResponseCode();
String response = null;
if (responseCode == HttpsURLConnection.HTTP_OK) {
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parentArray = parentObject.getJSONArray("data");
for (int i = 0; i < parentArray.length(); i++) {
Templates item = new Gson().fromJson(parentArray.get(i).toString(), Templates.class);
list.add(item);
}
} else {
response = connection.getResponseMessage();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if (connection != null)
connection.disconnect();
try {
if (reader != null)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
nextStep(); //call next Thread
}
}
});
t.start();
return list;
}
public List<Jobs> toJobs(final String... params) {
final List<Jobs> list = new ArrayList<>();
Thread t = new Thread(new Runnable() {
#Override
public void run() {
URL url = null;
BufferedReader reader = null;
HttpURLConnection connection = null;
try {
url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
int responseCode = connection.getResponseCode();
String response = null;
if (responseCode == HttpsURLConnection.HTTP_OK) {
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parentArray = parentObject.getJSONArray("data");
for (int i = 0; i < parentArray.length(); i++) {
Jobs item = new Gson().fromJson(parentArray.get(i).toString(), Jobs.class);
list.add(item);
}
} else {
response = connection.getResponseMessage();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if (connection != null)
connection.disconnect();
try {
if (reader != null)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
nextStep();
}
}
});
t.start();
return list;
}
public Boolean sendJobs(final List<Jobs> job, final String... params) {
final Boolean[] result = {false};
Thread t = new Thread(new Runnable() {
#Override
public void run() {
URL url = null;
HttpURLConnection conn = null;
try {
url = new URL(params[0]);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
conn.setDoInput(true);
conn.setDoOutput(true);
String str = new Gson().toJson(job);
Log.d(TAG, str);
byte[] outputInBytes = str.getBytes();
OutputStream os = conn.getOutputStream();
os.write(outputInBytes);
os.flush();
int responseCode = conn.getResponseCode();
String response = null;
if (responseCode == HttpsURLConnection.HTTP_OK) {
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((line = br.readLine()) != null) {
response += line;
}
result[0] = true;
} else {
response = conn.getResponseMessage();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
conn.disconnect();
nextStep();
}
}
});
t.start();
return result[0];
}
}
Whenever a thread ends, it calls the nextStep() method, which starts the next trhead.
I'm trying to select text file by open file explorer then read the selected file.
I tried many many solutions. the last one is this code
public void btnRead_Click(View view) {
Intent chooseFile = new Intent(Intent.ACTION_GET_CONTENT);
chooseFile.setType("text/plain");
startActivityForResult(chooseFile, 1);
}
#Override
protected void onActivityResult(int requestedCode, int resultCode, Intent data) {
if (requestedCode == 1) {
if (resultCode == RESULT_OK) {
File file = new File(data.getDataString());
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
br.close();
}
catch (IOException e){}
textView = (TextView) findViewById(R.id.textView);
textView.setText(text);
}
}
}
Thanks in advance
I found the solution here: https://stackoverflow.com/a/40638366/5727559
The code is:
public static int PICK_FILE = 1;
public void btnRead_Click(View view)
{
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("text/plain");
startActivityForResult(intent, PICK_FILE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_FILE)
{
if (resultCode == RESULT_OK)
{
Uri uri = data.getData();
String fileContent = readTextFile(uri);
Toast.makeText(this, fileContent, Toast.LENGTH_LONG).show();
}
}
}
private String readTextFile(Uri uri)
{
BufferedReader reader = null;
StringBuilder builder = new StringBuilder();
try
{
reader = new BufferedReader(new InputStreamReader(getContentResolver().openInputStream(uri)));
String line = "";
while ((line = reader.readLine()) != null)
{
builder.append(line);
}
reader.close();
}
catch (IOException e) {e.printStackTrace();}
return builder.toString();
}
I am creating an android app. I need to implement a code for uploading profile pic either from gallery or from by capturing from camera.An alert will be shown on clicking the part where picture to be uploaded. It consists of three options One to capture from camera,One to take from gallery,One to cancel.I can successfully
image captured from camera buy when I try to upload Image from gallery i got this error
E/MainActivity: Response from server: java.io.FileNotFoundException: /storage/emulated/0/Pictures/Upload/IMG_20170227_142713.jpg (No such file or directory)
This is the code I used to for alert builder to show options and also to open image gallery or to launch camera
//code to choose profile pic
iv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
/*Toast.makeText(getApplicationContext(),
"Please choose a photo", Toast.LENGTH_LONG)
.show();*/
final CharSequence[] items = { "Take Photo", "Choose from Library",
"Cancel" };
AlertDialog.Builder builder = new AlertDialog.Builder(LeftMenusMediaActivity.this);
builder.setTitle("Add Photo!");
builder.setItems(items,new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int item) {
if (items[item].equals("Take Photo")) {
//define the file-name to save photo taken by Camera activity
String fileName = "new-photo-name.jpg";
//create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION,"Image captured by camera");
//imageUri is the current activity attribute, define and save it for later usage (also in onSaveInstanceState)
imageUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
//create new Intent
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, PICK_Camera_IMAGE);
} else if (items[item].equals("Choose from Library")) {
try {
Intent gintent = new Intent();
gintent.setType("image/*");
gintent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(gintent, "Select Picture"),
PICK_IMAGE);
} catch (Exception e) {
Toast.makeText(getApplicationContext(),
e.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
} else if (items[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
});
This is my onActivity result function
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
selectedImageUri = null;
String filePath = null;
switch (requestCode) {
case PICK_IMAGE:
if (resultCode == Activity.RESULT_OK) {
selectedImageUri = data.getData();
// getPath(selectedImageUri);
launchUploadActivity(true);
Toast.makeText(this, selectedImageUri.toString(), Toast.LENGTH_SHORT).show();
}
break;
case PICK_Camera_IMAGE:
if (resultCode == RESULT_OK) {
//use imageUri here to access the image
selectedImageUri = imageUri;
launchUploadActivity(true);
/*Bitmap mPic = (Bitmap) data.getExtras().get("data");
selectedImageUri = Uri.parse(MediaStore.Images.Media.insertImage(getContentResolver(), mPic, getResources().getString(R.string.app_name), Long.toString(System.currentTimeMillis())));*/
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
}
break;
}
This is my function to launch upload activity
private void launchUploadActivity(boolean isImage){
Intent i = new Intent(LeftMenusMediaActivity.this, UploadActivity.class);
i.putExtra("filePath", selectedImageUri.getPath());
i.putExtra("isImage", isImage);
startActivity(i);
}
This the my Upload activity class
public class UploadActivity extends Activity {
// LogCat tag
private static final String TAG = MainActivity.class.getSimpleName();
private String filePath = null;
long totalSize = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Changing action bar background color
/* getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor(getResources().getString(
R.color.action_bar))));*/
// Receiving the data from previous activity
Intent i = getIntent();
// image or video path that is captured in previous activity
filePath = i.getStringExtra("filePath");
// boolean flag to identify the media type, image or video
boolean isImage = i.getBooleanExtra("isImage", true);
if (filePath != null) {
// Displaying the image or video on the screen
//previewMedia(isImage);
new UploadFileToServer().execute();
} else {
Toast.makeText(getApplicationContext(),
"Sorry, file path is missing!", Toast.LENGTH_LONG).show();
}
}
/**
* Uploading the file to server
* */
private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
#Override
protected void onPreExecute() {
// setting progress bar to zero
// progressBar.setProgress(0);
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
return uploadFile();
}
#SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(AppConfig.URL_PHOTO);
try {
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
new AndroidMultiPartEntity.ProgressListener() {
#Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
File sourceFile = new File(filePath);
;
// Adding file data to http body
entity.addPart("image", new FileBody(sourceFile));
// Extra parameters if you want to pass to server
entity.addPart("website",
new StringBody("www.androidhive.info"));
entity.addPart("email", new StringBody("abc#gmail.com"));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
Log.e(TAG, "Response from server: " + result);
// showing the server response in an alert dialog
showAlert(result);
super.onPostExecute(result);
}
}
/**
* Method to show alert dialog
* */
private void showAlert(String message) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(message).setTitle("Response from Servers")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// do nothing
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
What are the changes needed to make upload from gallery working
My app is working now. I made following changes to my code.
On activity result part
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
selectedImageUri = null;
switch (requestCode) {
case PICK_IMAGE:
if (resultCode == Activity.RESULT_OK) {
selectedImageUri = data.getData();
imagepath = getPath(selectedImageUri);
launchUploadActivity2(true);
Bitmap bitmap=BitmapFactory.decodeFile(imagepath);
iv.setImageBitmap(bitmap);
Toast.makeText(this, selectedImageUri.toString(), Toast.LENGTH_SHORT).show();
}
break;
case PICK_Camera_IMAGE:
if (resultCode == RESULT_OK) {
//use imageUri here to access the image
selectedImageUri = imageUri;
imagepath2=selectedImageUri.getPath();
launchUploadActivity(true);
Bitmap bitmap=BitmapFactory.decodeFile(imagepath2);
iv.setImageBitmap(bitmap);
Log.d(TAG,selectedImageUri.toString());
Toast.makeText(this, selectedImageUri.toString(), Toast.LENGTH_SHORT).show();
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
}
break;
}
I made two separate functions for launching upload activity.
Function for launching upload activity class for uploading image from gallery to server is this
private void launchUploadActivity2(boolean isImage){
filePath=imagepath;
if (filePath != null) {
// Displaying the image or video on the screen
//previewMedia(isImage);
new UploadImageToServer1().execute();
} else {
Toast.makeText(getApplicationContext(),
"Sorry, file path is missing!", Toast.LENGTH_LONG).show();
}
}
Function for uploading activity class for uploading image by capturing to server
private void launchUploadActivity(boolean isImage){
filePath=selectedImageUri.getPath();
if (filePath != null) {
// Displaying the image or video on the screen
//previewMedia(isImage);
new UploadImageToServer().execute();
} else {
Toast.makeText(getApplicationContext(),
"Sorry, file path is missing!", Toast.LENGTH_LONG).show();
}
}
Upload activity class
private class UploadImageToServer extends AsyncTask<Void, Integer, String> {
#Override
protected void onPreExecute() {
// setting progress bar to zero
// progressBar.setProgress(0);
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
return uploadFile();
}
#SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(AppConfig.URL_PHOTO);
try {
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
new AndroidMultiPartEntity.ProgressListener() {
#Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
File sourceFile = new File(filePath);
;
// Adding file data to http body
entity.addPart("image", new FileBody(sourceFile));
// Extra parameters if you want to pass to server
entity.addPart("userid",
new StringBody(session.getuid()));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
Log.e(TAG, "Response from server: " + result);
// showing the server response in an alert dialog
super.onPostExecute(result);
}
}
This is the function to create path to a particular folder while capturing image
/**
* Creating file uri to store image/video
*/
public Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
/**
* returning image / video
*/
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
AppConfig.IMAGE_DIRECTORY_NAME);
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d(TAG, "Oops! Failed create "
+ AppConfig.IMAGE_DIRECTORY_NAME + " directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else if (type == MEDIA_TYPE_VIDEO) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "VID_" + timeStamp + ".mp4");
} else {
return null;
}
return mediaFile;
}
Now I can upload from both gallery and camera
Please check the permission in manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Hope this helps.:)
this blog and this repo will be help to you
https://onurgurbuz.github.io/android-ftp-server-kullanimi
https://github.com/onurgurbuz/AndroFTP
OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("SessionId", "")
.addFormDataPart("UserDeviceGuid", "")
.addFormDataPart("UserPhoto", "photo.png", RequestBody.create(MEDIA_TYPE_PNG, new File(path)))
.build();
serverURL = serverURL + "/FileUpload/UserPhotoUpload";
Request request = new Request.Builder().url(serverURL).post(requestBody).build();
try {
Response response = client.newCall(request).execute();
String strResponse = response.body().string();
Log.d("upload image", "Response" + strResponse);
if (!response.isSuccessful()) {
} else {
JSONObject jsonResponse = null;
try {
jsonResponse = new JSONObject(strResponse);
} catch (JSONException e) {
e.printStackTrace();
}
if (jsonResponse != null && jsonResponse.has("Success") && jsonResponse.getBoolean("Success")) {
isSuccess = true;
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
to get retrofit object
if (retrofit == null) {
retrofit = new retrofit2.Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
Interface
#GET("/photos")
Call<List> getAllPhotos();
get galary image path
private Context context;
/* Get uri related content real local file path. */
public String getUriRealPath(Context ctx, Uri uri, int type) {
this.context = ctx;
String ret = "";
if (isAboveKitKat()) {
// Android OS above sdk version 19.
ret = getUriRealPathAboveKitkat(ctx, uri, type);
} else {
// Android OS below sdk version 19
ret = getImageRealPath(context.getContentResolver(), uri, null);
}
return ret;
}
public Uri getImageUri(Context context, Bitmap bitmap) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
String path = MediaStore.Images.Media.insertImage(context.getContentResolver(), bitmap, "img", null);
return Uri.parse(path);
} catch (IllegalArgumentException e) {
} catch (Exception e) {
}
return null;
}
#TargetApi(Build.VERSION_CODES.KITKAT)
private String getUriRealPathAboveKitkat(Context ctx, Uri uri, int type) {
String ret = "";
if (ctx != null && uri != null) {
if (type == 1) {
if (isFileUri(uri)) {
ret = uri.getPath();
} else if (isDocumentUri(ctx, uri)) {
ret = getPath(uri);
} else if (isGooglePhotoDoc(uri.getAuthority())) {
ret = uri.getLastPathSegment();
} else if (uri.toString().startsWith("content://com.google.android.apps.photos.contentprovider")){
try {
InputStream inputStream = context.getContentResolver().openInputStream(uri); // context needed
File photoFile = createTemporalFileFrom(inputStream);
ret = photoFile.getPath();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
} else if (isContentUri(uri)) {
if (isGooglePhotoDoc(uri.getAuthority())) {
ret = uri.getLastPathSegment();
} else if (uri.toString().startsWith("content://com.google.android.apps.photos.contentprovider")){
try {
InputStream inputStream = context.getContentResolver().openInputStream(uri); // context needed
File photoFile = createTemporalFileFrom(inputStream);
ret = photoFile.getPath();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else if (uri.toString().startsWith("content://com.google.android.apps.photos.content")){
try {
InputStream is = context.getContentResolver().openInputStream(uri);
if (is != null) {
Bitmap pictureBitmap = BitmapFactory.decodeStream(is);
ret = getImageUri(context, pictureBitmap).toString();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
ret = getImageRealPath(context.getContentResolver(), uri, null);
}
} else if (isFileUri(uri)) {
ret = uri.getPath();
} else if (isDocumentUri(ctx, uri)) {
ret = getPath(uri);
}
}
return ret;
}
private File createTemporalFileFrom(InputStream inputStream) throws IOException {
File targetFile = null;
if (inputStream != null) {
int read;
byte[] buffer = new byte[8 * 1024];
targetFile = createTemporalFile();
OutputStream outputStream = new FileOutputStream(targetFile);
while ((read = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, read);
}
outputStream.flush();
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return targetFile;
}
private File createTemporalFile() {
return new File(context.getExternalCacheDir(), "tempFile.jpg"); // context needed
}
#RequiresApi(api = Build.VERSION_CODES.KITKAT)
private String getPath(Uri uri) {
String ret = "";
// Get uri related document id.
String documentId = DocumentsContract.getDocumentId(uri);
// Get uri authority.
String uriAuthority = uri.getAuthority();
if (isMediaDoc(uriAuthority)) {
String idArr[] = documentId.split(":");
if (idArr.length == 2) {
// First item is document type.
String docType = idArr[0];
// Second item is document real id.
String realDocId = idArr[1];
// Get content uri by document type.
Uri mediaContentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
if ("image".equals(docType)) {
mediaContentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(docType)) {
mediaContentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(docType)) {
mediaContentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
// Get where clause with real document id.
String whereClause = MediaStore.Images.Media._ID + " = " + realDocId;
ret = getImageRealPath(context.getContentResolver(), mediaContentUri, whereClause);
}
} else if (isDownloadDoc(uriAuthority)) {
// Build download uri.
Uri downloadUri = Uri.parse("content://downloads/public_downloads");
// Append download document id at uri end.
Uri downloadUriAppendId = ContentUris.withAppendedId(downloadUri, Long.valueOf(documentId));
ret = getImageRealPath(context.getContentResolver(), downloadUriAppendId, null);
} else if (isExternalStoreDoc(uriAuthority)) {
String idArr[] = documentId.split(":");
if (idArr.length == 2) {
String type = idArr[0];
String realDocId = idArr[1];
if ("primary".equalsIgnoreCase(type)) {
ret = Environment.getExternalStorageDirectory() + "/" + realDocId;
}
}
}
return ret;
}
/* Check whether current android os version is bigger than kitkat or not. */
private boolean isAboveKitKat() {
boolean ret = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
return ret;
}
/* Check whether this uri represent a document or not. */
#TargetApi(Build.VERSION_CODES.KITKAT)
private boolean isDocumentUri(Context ctx, Uri uri) {
boolean ret = false;
if (ctx != null && uri != null) {
ret = DocumentsContract.isDocumentUri(ctx, uri);
}
return ret;
}
/* Check whether this uri is a content uri or not.
content uri like content://media/external/images/media/1302716
*/
public boolean isContentUri(Uri uri) {
boolean ret = false;
if (uri != null) {
String uriSchema = uri.getScheme();
if ("content".equalsIgnoreCase(uriSchema)) {
ret = true;
}
}
return ret;
}
/* Check whether this uri is a file uri or not.
file uri like file:///storage/41B7-12F1/DCIM/Camera/IMG_20180211_095139.jpg
*/
public boolean isFileUri(Uri uri) {
boolean ret = false;
if (uri != null) {
String uriSchema = uri.getScheme();
if ("file".equalsIgnoreCase(uriSchema)) {
ret = true;
}
}
return ret;
}
/* Check whether this document is provided by ExternalStorageProvider. */
private boolean isExternalStoreDoc(String uriAuthority) {
boolean ret = false;
if ("com.android.externalstorage.documents".equals(uriAuthority)) {
ret = true;
}
return ret;
}
/* Check whether this document is provided by DownloadsProvider. */
private boolean isDownloadDoc(String uriAuthority) {
boolean ret = false;
if ("com.android.providers.downloads.documents".equals(uriAuthority)) {
ret = true;
}
return ret;
}
/* Check whether this document is provided by MediaProvider. */
private boolean isMediaDoc(String uriAuthority) {
boolean ret = false;
if ("com.android.providers.media.documents".equals(uriAuthority)) {
ret = true;
}
return ret;
}
/* Check whether this document is provided by google photos. */
private boolean isGooglePhotoDoc(String uriAuthority) {
boolean ret = false;
if ("com.google.android.apps.photos.content".equals(uriAuthority)) {
ret = true;
}
return ret;
}
/* Return uri represented document file real local path.*/
public String getImageRealPath(ContentResolver contentResolver, Uri uri, String whereClause) {
String ret = "";
// Query the uri with condition.
Cursor cursor = contentResolver.query(uri, null, whereClause, null, null);
if (cursor != null) {
boolean moveToFirst = cursor.moveToFirst();
if (moveToFirst) {
// Get columns name by uri type.
String columnName = MediaStore.Images.Media.DATA;
if (uri == MediaStore.Images.Media.EXTERNAL_CONTENT_URI) {
columnName = MediaStore.Images.Media.DATA;
} else if (uri == MediaStore.Audio.Media.EXTERNAL_CONTENT_URI) {
columnName = MediaStore.Audio.Media.DATA;
} else if (uri == MediaStore.Video.Media.EXTERNAL_CONTENT_URI) {
columnName = MediaStore.Video.Media.DATA;
}
// Get column index.
int imageColumnIndex = cursor.getColumnIndex(columnName);
// Get column value which is the uri related file local path.
ret = cursor.getString(imageColumnIndex);
}
}
if (cursor != null){
cursor.close();
}
return ret;
}
Below code get image from gallery and go to show in image view
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1111:
if (resultCode == Activity.RESULT_OK) {
if (data != null) {
Uri selectedImage = data.getData();
if (selectedImage == null) {
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String name = "" + System.currentTimeMillis();
String path = MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, name, null);
selectedImage = Uri.parse(path);
}
if (selectedImage != null) {
adapter.dataList.get(index).setUri(selectedImage);
adapter.notifyDataSetChanged();
gotoUploadImage(selectedImage);
}
}
}
break;
}
}
Below code is to get list from web server
GetDataService service = RetrofitClientInstance.getRetrofitInstance().create(GetDataService.class);
Call<List<RetroPhoto>> call = service.getAllPhotos();
call.enqueue(new Callback<List<RetroPhoto>>() {
#Override
public void onResponse(Call<List<RetroPhoto>> call, Response<List<RetroPhoto>> response) {
progressDoalog.dismiss();
generateDataList(response.body());
}
#Override
public void onFailure(Call<List<RetroPhoto>> call, Throwable t) {
progressDoalog.dismiss();
Toast.makeText(HomeScreenActivity.this, "Something went wrong...Please try later!", Toast.LENGTH_SHORT).show();
}
});
So I have a bit of code that is returning me a GET response Code of 200 but will tell me that it is failing.
Here is the bit of code that is failing:
protected String doInBackground(Void... urls) {
// Do some validation here
try {
URL url = new URL(API_URL + authPreferences.getToken());
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0");
int responseCode = urlConnection.getResponseCode();
System.out.println("GET Response code:" + responseCode);
// urlConnection.addRequestProperty("client_id", ClientId);
// urlConnection.addRequestProperty("client_secret", ClientSecret);
// urlConnection.setRequestProperty("Authorization", "JWT " + authPreferences);
Log.i("URL", url.toString());
try {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
return stringBuilder.toString();
} finally {
urlConnection.disconnect();
}
} catch (Exception e) {
Log.e("ERROR", e.getMessage(), e);
return null;
}
}
protected void onPostExecute(String response) {
if (response == null) {
response = "THERE WAS AN ERROR";
}
progressBar.setVisibility(View.GONE);
Log.i("INFO", response);
responseView.setText(response);
//
// TODO: check this.exception
// TODO: do something with the feed
// try {
// JSONObject object = (JSONObject) new JSONTokener(response).nextValue();
// String requestID = object.getString("requestId");
// int likelihood = object.getInt("likelihood");
// JSONArray photos = object.getJSONArray("photos");
// .
// .
// .
// .
// } catch (JSONException e) {
// e.printStackTrace();
// }
}
}
I need the API_URL + authPreferences.getToken() to return me a token from the API_URL. The data type is JSON so maybe I am not handling that correctly? If you guys need to see any other big of my code just let me know. Any help is greatly appreciated.
The request and invalidate
public void requestToken() {
Account userAccount = null;
String user = authPreferences.getUser();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.GET_ACCOUNTS) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
for (Account account : mAccountManager.getAccountsByType(GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE)) {
if (account.name.equals(user)) {
userAccount = account;
break;
}
}
mAccountManager.getAuthToken(userAccount, "oauth2:" + SCOPE, null, this, new OnTokenAcquired(), null);
}
private void invalidateToken() {
AccountManager mAccountManager = AccountManager.get(this);
mAccountManager.invalidateAuthToken("com.google", authPreferences.getToken());
authPreferences.setToken(null);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == AUTHORIZATION_CODE) {
requestToken();
} else if (requestCode == ACCOUNT_CODE) {
String accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
authPreferences.setUser(accountName);
// invalidate old tokens which might be cached. we want a fresh
// one, which is guaranteed to work
invalidateToken();
requestToken();
}
}
}
public class OnTokenAcquired implements AccountManagerCallback<Bundle> {
#Override
public void run(AccountManagerFuture<Bundle> result) {
try {
Bundle bundle = result.getResult();
Intent launch = (Intent) bundle.get(AccountManager.KEY_INTENT);
if (launch != null) {
startActivityForResult(launch, AUTHORIZATION_CODE);
} else {
String token = bundle.getString(AccountManager.KEY_AUTHTOKEN);
authPreferences.setToken(token);
doCoolAuthenticatedStuff();
}
} catch (Exception e) {
Log.e("ERROR", e.getMessage(), e);
}
}
}
I am using Asynctask to extract some data from the web and use it in further calculations. I have implemented a connectivity check as well, it returns false if there is no connection but It crashes if there is internet connection and "the server is down". I want to display a dialog to notify the user that their internet is experiencing problems. But I can't seem to get it right. Please help. Thanks in advance. :)
HttpClient client;
String URL, re, element;
JSONObject json, getjson;
int i, j, statusCode;
HttpGet httpget;
HttpResponse response;
HttpEntity entity;
InputStream is;
BufferedReader reader;
StringBuilder sb, sb1;
SharedPreferences getinput, passjson;
ProgressDialog pd;
Context context = DataRetrieve.this;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.dataretrieve);
// Bundle gotBasket = getIntent().getExtras();
// URL = gotBasket.getString("key");
getinput = getSharedPreferences("input", 0);
URL = getinput.getString("key", null);
if (!isNetworkReachable()) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("No Network Connection");
builder.setMessage("The Network is unavailable. Please check your internet connection.");
builder.setPositiveButton("Settings",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent m = new Intent(
android.provider.Settings.ACTION_SETTINGS);
startActivity(m);
}
});
builder.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
Intent n = new Intent(DataRetrieve.this,
OpTilt.class);
startActivity(n);
}
});
builder.create().show();
} else {
Read r = new Read();
r.execute();
}
}
private boolean isNetworkReachable() {
// TODO Auto-generated method stub
ConnectivityManager mManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo current = mManager.getActiveNetworkInfo();
if (current != null && current.isConnectedOrConnecting()) {
return true;
}
return false;
}
public class Read extends AsyncTask<String, Integer, String> {
#Override
protected void onPreExecute() {
pd = new ProgressDialog(DataRetrieve.this);
pd.setTitle("Processing...");
pd.setMessage("Please wait.");
pd.setCancelable(false);
pd.setIndeterminate(true);
pd.show();
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
re = null;
is = null;
json = null;
try {
httpget = new HttpGet(URL);
client = new DefaultHttpClient();
response = client.execute(httpget);
entity = response.getEntity();
is = entity.getContent();
statusCode = response.getStatusLine().getStatusCode();
} catch (Exception e) {
statusCode = -1;
Log.e("log_tag", "Erro http " + e.toString());
}
if (statusCode == 200) {
try {
reader = new BufferedReader(new InputStreamReader(is,
"UTF-8"), 8);
sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
re = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Erro conversão " + e.toString());
}
}
return re;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
pd.dismiss();
try {
json = new JSONObject(result);
getjson = json.getJSONObject("Solar");
String H[] = new String[getjson.length()];
for (i = 0, j = 1; i < getjson.length(); i++, j++) {
H[i] = getjson.getString("" + j);
}
SharedPreferences sendHm;
sendHm = getSharedPreferences("parsedata", 0);
SharedPreferences.Editor editor = sendHm.edit();
for (int k = 0; k < H.length; k++) {
editor.putString("Hm" + k, H[k]);
}
editor.commit();
Intent f = new Intent(DataRetrieve.this, Calculator.class);
startActivity(f);
/*
* Bundle bundle = new Bundle(); bundle.putStringArray("key1",
* H); Intent f = new Intent(DataRetrieve.this,
* Calculator.class); f.putExtras(bundle); startActivity(f);
*/
}
catch (JSONException e) {
Log.e("log_tag", "Erro dados " + e.toString());
}
}
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
finish();
}
}
change your postExcute method code to below (you should check the result is not null or empty)
pd.dismiss();
if(!TextUtils.isEmpty(result))
{
try {
json = new JSONObject(result);
getjson = json.getJSONObject("Solar");
String H[] = new String[getjson.length()];
for (i = 0, j = 1; i < getjson.length(); i++, j++) {
H[i] = getjson.getString("" + j);
}
SharedPreferences sendHm;
sendHm = getSharedPreferences("parsedata", 0);
SharedPreferences.Editor editor = sendHm.edit();
for (int k = 0; k < H.length; k++) {
editor.putString("Hm" + k, H[k]);
}
editor.commit();
Intent f = new Intent(DataRetrieve.this, Calculator.class);
startActivity(f);
/*
* Bundle bundle = new Bundle(); bundle.putStringArray("key1",
* H); Intent f = new Intent(DataRetrieve.this,
* Calculator.class); f.putExtras(bundle); startActivity(f);
*/
}
catch (JSONException e) {
Log.e("log_tag", "Erro dados " + e.toString());
}
}