I am calling rest API which gets access token from salesforce. after I make a rest call to get data from Salesforce and I'm successfully getting records. and all records are shown in android activity list view.
after that I call fragment but fragment view is not showing.
if I'm not making rest call then fragment show properly.
Here is the MainActivity class
public class MainActivity extends AppCompatActivity {
DrawerLayout dLayout;
private ArrayAdapter<String> listAdapter;
ProgressDialog progressDialog;
JSONTokener tokener;
String accessToken_, instanceURL_;
JSONArray finalResult;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setNavigationDrawer(); // call method
// button_save_account = (Button) findViewById(R.id.button_save_account);
accessToken_ = "00D7F000005oJve!ARUAQPJ8hMWibtO1flIPjZfzV4A__Kzj6wTjJ5XA_xE1zbqDs_0fOTZuxJFiLVxsFx_kNPxuNNK6c7yREtbxq4J7W1oWuUEs";
instanceURL_ = "https://harishgakhar40-dev-ed.my.salesforce.com";
// Create list adapter
listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, new ArrayList<String>());
((ListView) findViewById(R.id.contacts_list)).setAdapter(listAdapter);
try {
MyAsyncTasks myAsyncTasks = new MyAsyncTasks();
myAsyncTasks.execute(accessToken_, instanceURL_).get();
} catch (Exception e) {
}
}
private void setNavigationDrawer() {
dLayout = (DrawerLayout) findViewById(R.id.drawer_layout); // initiate a DrawerLayout
NavigationView navView = (NavigationView) findViewById(R.id.navigation); // initiate a Navigation View
navView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
Fragment frag = null; // create a Fragment Object
int itemId = menuItem.getItemId(); // get selected menu item's id
if (itemId == R.id.first) {
frag = new InsertRecords();
Bundle bundle = new Bundle();
bundle.putString("access token", accessToken_);
bundle.putString("instanc url", instanceURL_);
frag.setArguments(bundle);
} else if (itemId == R.id.second) {
Log.v("fragment second ---- ", "In Fragment Second ---- ");
frag = new SecondFragment();
} else if (itemId == R.id.third) {
frag = new ThirdFragment();
}
Toast.makeText(getApplicationContext(), menuItem.getTitle(), Toast.LENGTH_SHORT).show();
if (frag != null) {
Log.v("frag ---- ", "frag ------ " + frag);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
Log.v("transaction ---- ", "transaction ------ " + frag);
transaction.replace(R.id.frame, frag); // replace a Fragment with Frame Layout
transaction.commit(); // commit the changes
dLayout.closeDrawers(); // close the all open Drawer Views
return true;
}
return false;
}
});
}
public class MyAsyncTasks extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// display a progress dialog for good user experiance
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setMessage("Please Wait");
progressDialog.setCancelable(false);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
#Override
protected String doInBackground(String... params) {
String accessToken = params[0];
String instanceURL = params[1];
// implement API in background and store the response in current variable
String result = "";
DefaultHttpClient client = new DefaultHttpClient();
String url = instanceURL + "/services/data/v20.0/query/?q=";
String soqlQuery = "Select Id, Name, BillingStreet, BillingCity, BillingState From Account Limit 10 ";
try {
url += URLEncoder.encode(soqlQuery, "UTF-8");
} catch (UnsupportedEncodingException e) {
}
HttpGet getRequest = new HttpGet(url);
getRequest.addHeader("Authorization", "OAuth " + accessToken);
Log.v("Token in doin ---- ", "accessToken ---- in doin ---- " + accessToken);
Log.v("instanceURL doin ---- ", "instanceURL ---- in doin ---- " + instanceURL);
try {
HttpResponse response = client.execute(getRequest);
result = EntityUtils.toString(response.getEntity());
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
#Override
protected void onPostExecute(String result) {
try {
progressDialog.dismiss();
// dismiss the progress dialog after receiving data from API
JSONObject object = (JSONObject) new JSONTokener(result).nextValue();
JSONArray records = object.getJSONArray("records");
// globalState.setAccountNames(new String[records.length()]);
// globalState.setAccounts(new JSONObject[records.length()]);
listAdapter.clear();
for (int i = 0; i < records.length(); i++) {
JSONObject record = (JSONObject) records.get(i);
String accountName = record.getString("Name");
Log.v("accountName---- ", "accountName ---- " + accountName);
listAdapter.add(accountName);
// globalState.getAccountNames()[i] = accountName;
//globalState.getAccounts()[i] = record;
}
} catch (Exception e) {
}
Log.d("data", result.toString());
}
}
}
You are blocking MainThread which is rendering UI.
To avoid this, android provides AsyncTask.
BUT make yourself and others working on your project favor and use Retrofit or other libraries. It will save you so much time and make your code cleaner.
Here you can find a good article.
If you really don't feel like using Retrofit, AsyncTask is an option too
You need to call your getAccountData function inside an AsyncTask. The implementation right now is blocking your UI thread, which created the problem I think.
public class GetAccountData implements AsyncTask<Void, Void, String> {
#Override
protected String doInBackground(Void... params) {
// Get account data here.
}
#Override
protected void onPostExecute(final String accountName) {
// Pass the accountName to the calling Activity here.
}
// Implement other methods if you need
}
If you are confused about how you can pass the data from your AsyncTask to your Activity, please consider looking into this answer here.
Related
I have an activity that calls JSON data from a foreign database.
Below is my ideal case for my app:
The JSON data is parsed and inserted into an SQLite database on Android
Next activity is started and the newly inserted data is read from the SQLite database
What actually happens:
The JSON data is parsed and inserted into an SQLite database on Android
The next activity is started while data is still being inserted and returns zero when reading from the desired databse for my ListArray in that activity.
How do I force Android to wait until database insertion is completed before starting the next activity?
EDIT
My doInBackground looks as follows:
#Override
protected String doInBackground(String... params) {
StringRequest strReq = new StringRequest(Request.Method.GET,
str, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
// Check for error node in json
if (!error) {
JSONArray jObjInside = jObj.getJSONArray("service_prov_services");
for (int i = 0; i < jObjInside.length(); i++) {
// Now store the user in SQLite
try {
// JSONObject user = jObj.getJSONObject("user");
String service_prov_type = jObj.getString("service_prov_type");
String service_prov_name = jObj.getString("service_prov_name");
String addr_street = jObj.getString("addr_street");
String addr_num = jObj.getString("addr_number");
String addr_plz = jObj.getString("addr_plz");
String addr_city = jObj.getString("addr_city");
JSONObject elem = jObjInside.getJSONObject(i);
if(elem != null){
String service_id = elem.getString("service_id");
String service_type = elem.getString("service_type");
String service_measure = elem.getString("service_measure");
// Inserting row in userServiceProvServices table
db.addUserServiceProvServices(service_id, service_prov_type,
service_prov_name, addr_street, addr_num, addr_plz, addr_city, service_type, service_measure);
Log.d("post_url for service", addr_plz );
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(), "Json error: " +
e.getMessage(), Toast.LENGTH_LONG).show();
}
}
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getActivity().getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(), "Json error: " +
e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getActivity().getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
}
});
Log.d("test string to appcntr",strReq.toString());
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
return params[0];
}
onPostExecute looks as follows:
#Override
protected void onPostExecute(String Result) {
//super.onPostExecute(Result);
pdLoading.dismiss();
//this method will be running on UI thread
Log.d(TAG, "Stamp: " + Result);
Bundle args = new Bundle();
args.putString("stampID", Result);
ProviderServiceListFragment frag = new ProviderServiceListFragment();
frag.setArguments(args);
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame,
frag)
.commit();
}
With the way I am doing it now, my next Fragment is already called, although the data has not finished being entered into the database. This means the ListArray in the follwoing Fragment is empty because of the missing database data.
I worked on this for a month and finally figured it out for myself (stupid nube I am..) So here is a piece of code inserting a record to sqlite.
On the chosen event ("onClick actionbutton1") a new AsyncTask is created with doInBackground, onPreExecute and onPostExecute.
onPreExecute will setMessage() and show() the progressDialog which will start spinning
onPostExecute will handle the new/next Activity
READ BELOW FOR doInBackground!!
actionButton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final ProgressDialog progressDialog = new ProgressDialog(AddUpdateEvf.this);
new AsyncTask<Void, Void, Boolean>() {
protected Boolean doInBackground(Void... params) {
doOneThing();
return null;
}
#Override
protected void onPreExecute() {
progressDialog.setMessage("Processing...");
progressDialog.show();
}
protected void onPostExecute(Boolean result) {
evaluationFormOps.close();
progressDialog.dismiss();
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(AddUpdateEvf.this);
alertDialogBuilder.setMessage("Added to Database...")
.setCancelable(false)
.setPositiveButton("Continue", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
i = new Intent(AddUpdateEvf.this, ViewProduct.class);
i.putExtra(EXTRA_ADD_UPDATE, "View");
i.putExtra(EXTRA_PRODUCT_ID, hiddenTextId.getText().toString());
i.putExtra(EXTRA_PRODUCT_NO, productNo_tv.toString());
startActivity(i);
dialog.dismiss();
finish();
}
});
AlertDialog alert = alertDialogBuilder.create();
alert.show();
}
private void doOneThing() {
makeDbRequest();
do {
evfId = newEvf.getEvfId();
}
while (evfId<1);
}
}.execute();
}
});
Note this snippet in the above code called in doInBackground():
private void doOneThing() {
makeDbRequest();
do {
evfId = newEvf.getEvfId();
}
while (evfId<1);
}
Note: The makeDbRequest() handles the insert to sqlite by setting the values and then passing it to another class which handles the cursor and puts the values etc.
Heres a small snippet of relevant code in that class (which you should already have mastered...):
public Evf addEvf(Evf evf, String dBsuccess){
ContentValues values = new ContentValues();
values.put(TableHelper.PRODUCT_IDE,evf.getPRODUCTId());
values.put(TableHelper.CSCORE,evf.getcScore());
values.put(TableHelper.FSCORE,evf.getfScore());
values.put(TableHelper.TSCORE,evf.gettScore());
values.put(TableHelper.WEIGHT,evf.getWeight());
values.put(TableHelper.TEMP,evf.getTemp());
values.put(TableHelper.STATUS,evf.getStatus());
values.put(TableHelper.TIMESTAMP, String.valueOf(evf.getTimeStamp()));
values.put(TableHelper.LOADED, dBsuccess);
long insertid = database.insert(TableHelper.TABLE_EVFS,null,values);
evf.setEvfId((int) insertid);
return evf;
}
So above you can see the Id of, in my case evaluationform(Evf), being set to the insert id. This happens after the insert and you can set any value in your object class (the one with getters and setters...Evf())
Finally, use the do...while statement above to "listen" for the value being set in the object class
This can obviously only happen if the insert was finished and the onPosteExecute takes care of the rest
Hope it helps, crit is welcome, PEACHES!!
Use AsyncTask to process the Database insertion process & then use the onPostExecute method to move away from the current activity.
private class ProcessDatabase extends AsyncTask<String, String, String> {
String sampleData;
#Override
protected String doInBackground(String... params) {
//Call your Database Insert method here.
//In this example, I am inserting sampleData to the DB
return null;
}
#Override
protected void onPostExecute(String result) {
//This gets triggered when the process is complete
}
}
You can start the AsyncTask by adding the following code in your onCreate or where ever you want to start the DB Insertion process:
//in this case I am just passing a string, You can create your own
//custom class & send that as well
ProcessDatabase.execute(myData);
Refer this link for more information. Good luck!
The StringRequest is an Asynchronous request, so upon the executing the those lines onPostExecute will called immediately, so there is no guarantee that the sql update will complete before the next activity is launched.
Call the nextActivity at the end of the onResponse callback method of the StringRequest which way you can guarantee to insert the data to db first and then call the nextActivity.
private void makeJsonRequest(String str) {
StringRequest strReq = new StringRequest(Request.Method.GET,
str, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
// Check for error node in json
if (!error) {
JSONArray jObjInside = jObj.getJSONArray("service_prov_services");
for (int i = 0; i < jObjInside.length(); i++) {
// Now store the user in SQLite
try {
// JSONObject user = jObj.getJSONObject("user");
String service_prov_type = jObj.getString("service_prov_type");
String service_prov_name = jObj.getString("service_prov_name");
String addr_street = jObj.getString("addr_street");
String addr_num = jObj.getString("addr_number");
String addr_plz = jObj.getString("addr_plz");
String addr_city = jObj.getString("addr_city");
JSONObject elem = jObjInside.getJSONObject(i);
if (elem != null) {
String service_id = elem.getString("service_id");
String service_type = elem.getString("service_type");
String service_measure = elem.getString("service_measure");
// Inserting row in userServiceProvServices table
db.addUserServiceProvServices(service_id, service_prov_type,
service_prov_name, addr_street, addr_num, addr_plz, addr_city, service_type, service_measure);
Log.d("post_url for service", addr_plz);
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(), "Json error: " +
e.getMessage(), Toast.LENGTH_LONG).show();
}
}
goNextActivity();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getActivity().getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(), "Json error: " +
e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getActivity().getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
}
});
Log.d("test string to appcntr", strReq.toString());
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
private void goNextActivity(){
//this method will be running on UI thread
ProviderServiceListFragment frag = new ProviderServiceListFragment();
frag.setArguments(args);
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame,
frag)
.commit();
}
Hello all i have a search activity into my app that works good if i try to search an item by tiping a text keyword but if i try to search an item that also contain a number app crash. For example if i try to search the text "home" search works good but if i search "home 3" app crash. The error is : exception-illegal-character-in-query-at-index I want that the search works good also by typing a text or a text + number exc..
Thank you
IMPORTANT :
the search activity call an encoded url, "ADSEARCH_URL"
public static final String ADSEARCH_URL="https://gjeme.com/apps/menjehere/index.php?action=searchAd&categoryId=%s&adcity=%s&q=%s";
This is the search activity :
public class SearchActivity extends AppCompatActivity {
Toolbar toolbar;
ListView lsv;
String categoryId,keyword,city;
ProgressDialog progressBar;
List<CatAdd> catAddList;
CateAdDisplayAdapter adapter;
Typeface typeface;
#SuppressLint("NewApi") #Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activty_search);
toolbar = (Toolbar) findViewById(R.id.toolbar);
if (toolbar != null) {
toolbar.setTitle("Browse Ads");
setSupportActionBar(toolbar);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
getActionBarTextView();
typeface = Typeface.createFromAsset(getAssets(), "fonts/GandhiSerif- Bold.otf");
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
lsv = (ListView)findViewById(R.id.listView1);
catAddList = new ArrayList<CatAdd>();
categoryId = getIntent().getExtras().getString("categoryId", "0");
keyword = getIntent().getExtras().getString("keyword","keyword");
city = getIntent().getExtras().getString("city","city");
new SearchList().execute();
lsv.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Intent intent = new Intent(getApplicationContext(), BrowseAdsDetailActivity.class);
intent.putExtra("adId", String.valueOf(catAddList.get(arg2).getAddid()));
startActivity(intent);
}
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if(id==android.R.id.home)
{
onBackPressed();
}
return super.onOptionsItemSelected(item);
}
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
}
private TextView getActionBarTextView() {
TextView titleTextView = null;
try {
Field f = toolbar.getClass().getDeclaredField("mTitleTextView");
f.setAccessible(true);
titleTextView = (TextView)f.get(toolbar);
titleTextView.setTypeface(typeface);
} catch (NoSuchFieldException e) {
} catch (IllegalAccessException e) {
}
return titleTextView;
}
class SearchList extends AsyncTask<Void, Void, Void>
{
String jsonStr = null;
CustomProgressDialog cd = new CustomProgressDialog();
#Override
protected void onPreExecute() {
super.onPreExecute();
cd.showdialog(SearchActivity.this, "Loading...");
}
#Override
protected Void doInBackground(Void... arg0) {
ServiceHandler sh = new ServiceHandler();
jsonStr = sh.makeServiceCall(String.format(Constants.ADSEARCH_URL,categoryId,city,keyword) , ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONArray contacts = jsonObj.getJSONArray(Constants.TAG);
for (int i = contacts.length()-1; i > -1; i--) {
JSONObject c = contacts.getJSONObject(i);
String adId = c.getString(Constants.CAT_ADID);
String adTitle = c.getString(Constants.CAT_ADTITLE);
String adDes = c.getString(Constants.CAT_ADDES);
String adCreatedAt = c.getString("adCreatedAt");
String adcity= c.getString(Constants.CAT_CITY);
String adPrise= c.getString(Constants.CAT_PRICE);
JSONArray arrImages=c.getJSONArray("images");
ArrayList<String> imgArray=new ArrayList<String>();
for(int j=0;j<arrImages.length();j++)
{
JSONObject imgObj=arrImages.getJSONObject(j);
if(imgObj.has("imageName"))
{
imgArray.add(imgObj.getString("imageName"));
}
}
CatAdd v=new CatAdd();
v.setAddid(Integer.parseInt(adId));
v.setAdTitle(adTitle);
v.setAdDesc(adDes);
v.setAdCreatedAt(adCreatedAt);
v.setAdPrice(adPrise);
v.setImglist(imgArray);
v.setAdCity(adcity);
catAddList.add(v);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
cd.dismissdialog();
adapter = new CateAdDisplayAdapter(getApplicationContext(), catAddList);
lsv.setAdapter(adapter);
}
}
}
I think there isn't any problem with alpha-numeric characters here, but the SPACE is created one, while you are adding the text to URL.
Replace space(es) of searched keyword with %20 and hopefully you will find it fine.
I'm fighting with this for a week, without luck.
From the begining:
There is an Activity with Navigation Drawer included. This activity has it's own fragments. Fragments have logic to send requests to a weather api and logic to update themselves with given data. At the first run everything seems to work fine! I'm able to send request and fill views with given data (using okHttp).
Everything is starting to collapse after fragments recreations, I'm getting constantly getActivity() to be null ;(
Code Sample below:
Fragments first initialisation:
public abstract class DoubleFragmentActivity extends AppCompatActivity {
protected static final String TOP_FRAGMENT = "TOP_FRAGMENT";
protected static final String BOTTOM_FRAGMENT = "BOTTOM_FRAGMENT";
protected abstract Fragment topFragment();
protected abstract Fragment bottomFragment();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_container);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.topFragmentContainer, topFragment(), TOP_FRAGMENT)
.add(R.id.bottomFragmentContainer, bottomFragment(), BOTTOM_FRAGMENT)
.commit();
getSupportFragmentManager().executePendingTransactions();
}
}
}
Navigation Drawer:
private void selectDrawerItem(MenuItem menuItem) {
Fragment f;
Fragment f2;
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
switch (menuItem.getItemId()) {
case R.id.forecastFragment:
f = getSupportFragmentManager().findFragmentByTag("TOP_FRAGMENT");
f2 = getSupportFragmentManager().findFragmentByTag("BOTTOM_FRAGMENT");
if (f != mCurrentForecastFragment || f2 != mDailyForecastFragment) {
ft.replace(R.id.topFragmentContainer, new CurrentForecastFragment(), "TOP_FRAGMENT");
ft.replace(R.id.bottomFragmentContainer, new DailyForecastFragment(), "BOTTOM_FRAGMENT");
} else {
}
break;
case R.id.settingsFragment:
mToolbar.setVisibility(View.INVISIBLE);
f = new SettingsFragment();
ft.replace(R.id.topFragmentContainer, f);
break;
case R.id.paymentsFragment:
f = new PaymentsFragment();
ft.replace(R.id.topFragmentContainer, f);
break;
case R.id.aboutFragment:
break;
default:
}
getSupportFragmentManager().executePendingTransactions();
ft.commit();
menuItem.setChecked(true);
setTitle(menuItem.getTitle());
mDrawer.closeDrawers();
}
Fragment`s logic for connecting and fullfilling data:
public void makeConnectionToApi(String lat, String lon) {
mWeatherParams.setLanguage(Locale.getDefault().getLanguage());
Activity a = getActivity();
Uri.Builder currentBuilder = new Uri.Builder();
currentBuilder.scheme("http")
.authority("api.openweathermap.org")
.appendPath("data")
.appendPath("2.5")
.appendPath("weather")
.appendQueryParameter(WeatherConstants.KEY_LATITUDE, lat)
.appendQueryParameter(WeatherConstants.KEY_LONGITUDE, lon)
.appendQueryParameter(WeatherConstants.KEY_UNITS, mUnit)
.appendQueryParameter(WeatherConstants.KEY_LANGUAGE, mWeatherParams.getLanguage())
.appendQueryParameter("APPID", "###");
String currentUrl = currentBuilder.build().toString();
if (mUtility.isNetworkAvalaible()) {
Request requestCurrent = new Request.Builder().url(currentUrl).build();
//FIRST CALL
mCall = client.newCall(requestCurrent);
mCall.enqueue(new Callback() {
#Override
public void onFailure(Request request, IOException e) {
Bundle args = new Bundle();
args.putString(TAG, e.toString());
Utility.invokeDialog(TAG, e.toString(), getFragmentManager());
}
#Override
public void onResponse(Response response) throws IOException {
String responseBody = String.valueOf(response.body().string());
try {
mForecast.setCurrent(fetchCurrent(responseBody));
} catch (JSONException e) {
e.printStackTrace();
}
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
fillViewWithValues();
}
});
}
});
} else {
Utility.invokeDialog(TAG, "Check your internet connection!", getFragmentManager());
}
}
private Current fetchCurrent(String responseBody) throws JSONException {
Current current = new Current();
JSONObject jo = new JSONObject(responseBody);
//FETCH WEATHER ARRAY
JSONArray weather = jo.getJSONArray(WeatherConstants.KEY_CURRENT_CONDITIONS_ARRAY);
for (int j = 0; j < weather.length(); j++) {
JSONObject weatherParser = weather.getJSONObject(j);
current.setIcon(weatherParser.getString(WeatherConstants.KEY_ICON_ID));
Log.i(TAG, "Icons ID: " + weatherParser.getString(WeatherConstants.KEY_ICON_ID));
current.setConditions(weatherParser.getString(WeatherConstants.KEY_DESCRIPTION));
}
//FETCH TEMP
JSONObject temp = jo.getJSONObject(WeatherConstants.KEY_MAIN_OBJECT);
current.setDay(temp.getDouble(WeatherConstants.KEY_TEMP));
current.setPressure(temp.getDouble(WeatherConstants.KEY_PRESSURE));
current.setHumidity(temp.getDouble(WeatherConstants.KEY_HUMIDITY));
current.setDayMax(temp.getDouble(WeatherConstants.KEY_TEMP_DAY_MAX));
// FETCH VISIBILITY
if (jo.has(WeatherConstants.KEY_VISIBILITY)) {
current.setVisibility(jo.getInt(WeatherConstants.KEY_VISIBILITY));
}
//FETCH WIND
JSONObject wind = jo.getJSONObject(WeatherConstants.KEY_WIND_OBJECT);
current.setWindSpeed(wind.getDouble(WeatherConstants.KEY_WIND_SPEED));
if (wind.has(WeatherConstants.KEY_WIND_DEGREES)) {
current.setWindDegrees(wind.getInt(WeatherConstants.KEY_WIND_DEGREES));
}
JSONObject clouds = jo.getJSONObject(WeatherConstants.KEY_CLOUDS);
current.setClouds(clouds.getInt("all"));
current.setTimeStamp(jo.getInt(WeatherConstants.KEY_TIMESTAMP));
current.setCurrentLocation(jo.getString(WeatherConstants.KEY_CITY_NAME));
return current;
}
private void fillViewWithValues() {
Current current = mForecast.getCurrent();
if (mDeegreSwitch == 0) {
mCurrentTemperature.setText(current.getDay() + "\u00B0");
// setBackgroundColor(current.getDay());
} else {
int c = current.getDay();
double f = (9.0 / 5.0) * c + 32;
int e = (int) Math.round(f);
mCurrentTemperature.setText(String.valueOf((int) Math.round(f)) + "\u00B0");
// setBackgroundColor(e);
}
mCurrentCondition.setText(current.getConditions());
mPressure.setText(String.valueOf(current.getPressure()) + "hPa");
mClouds.setText(String.valueOf(current.getClouds()) + "%");
mHumidity.setText(String.valueOf(current.getHumidity()) + "%");
mCurrentIcon.setImageResource(current.getIcon());
}
Problems occurs here: getActivity().runOnUiThread inside makeConnectionToApi method. I've tried to fetch an activity from onAttach method and pass it makeConnectionToApi as parameter, it worked...but partially. App didn't crash but fragment`s view was not updated, like there was a second fragment underneath or something.
I have filling it might be something with threads or I'm doing sth wrong with fragments transaction...
I have a splash screen that loads URLs from the Internal Storage and downloads their content from the Web (with an AsynkTask). It puts the downloaded data into an ArrayList, calls the main Activity and finishes. The main activity adapter manages the ArrayList and sets a ListView containing its data.
While I'm in the main Activity, if I press the back button the application exits (I set the android:nohistory="true" for the splash screen activity), but when I return to the app, the splash screen gets loaded and downloads the data again, "doubling" the list view.
How can I prevent the splash screen to be loaded when I return to the app?
Splash screen code:
Context mContext;
ProgressBar progress = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.activity_launcher);
progress = (ProgressBar)findViewById(R.id.progress);
progress.setIndeterminate(true);
if(canWriteOnExternalStorage()) {
try {
setupStorage();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else
//dialog appears
}
AsynkTask code:
private class LoadGames extends
AsyncTask<String, Integer, Boolean> {
private ProgressDialog mProgressDialog = null;
private String remoteUrl = null;
#Override
protected void onCancelled() {
Log.e(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: onCancelled !");
super.onCancelled();
}
#Override
protected void onPreExecute() {
Log.d(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: onPreExecute !");
}
#Override
protected Boolean doInBackground(String... params) {
if (params.length == 0)
return false;
else
for (int k = 0; k < (params.length)/2; ++k)
{
this.remoteUrl = params[k*2];
Log.d(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: doInBackground ! ("
+ this.remoteUrl + ")");
// HTTP Request to retrieve the videogames list in JSON format
try {
// Creates the remote request
Log.d(com.example.ludos2_0.MainActivity.TAG,
this.remoteUrl);
RESTRequest request = new RESTRequest(this.remoteUrl);
request.isMethodGET(true);
// Executes the request and print the received response
String response = RESTRequestExecutor.execute(request);
// Custom/Manual parsing using GSON
JsonParser parser = new JsonParser();
if (response != null && response.length() > 0) {
Log.d(com.example.ludos2_0.MainActivity.TAG, "Response: "
+ response);
JsonObject jsonObject = (JsonObject) parser.parse(response);
JsonObject itemObj = jsonObject.getAsJsonObject("results");
String id = null;
String title = null;
String thumbnail = null;
String description = null;
String image = null;
String platform = null;
id = itemObj.get("id").getAsString();
title = itemObj.get("name").getAsString();
if (!(itemObj.get("image").isJsonNull()))
{
thumbnail = ((JsonObject)itemObj.get("image")).get("tiny_url").getAsString();
image = ((JsonObject)itemObj.get("image")).get("small_url").getAsString();
}
else
{
thumbnail = "http://www.persicetometeo.com/images/not_available.jpg";
image = "http://www.persicetometeo.com/images/not_available.jpg";
}
description = itemObj.get("deck").getAsString();
platform = params[k*2 + 1];
Log.d(com.example.ludos2_0.MainActivity.TAG,
title);
ListsManager.getInstance().addVideogame(new Videogame(id, title, thumbnail, image, description, platform));
} else {
Log.d(com.example.ludos2_0.MainActivity.TAG,
"Error getting response ...");
}
} catch (Exception e) {
e.printStackTrace();
Log.e(com.example.ludos2_0.MainActivity.TAG,
"Exception: " + e.getLocalizedMessage());
}
}
return true;
}
#Override
protected void onPostExecute(Boolean result) {
Log.d(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: onPostExecute !");
progress.setVisibility(View.GONE);
if (result == false) {
Log.e(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: Error Downloading Data !");
} else {
Log.d(com.example.ludos2_0.MainActivity.TAG,
"AsyncTask->LoadGames: Data Correctly Downloaded !");
Intent intent = new Intent(mContext, MainActivity.class);
startActivity(intent);
finish();
}
super.onPostExecute(result);
}
}
The setupStorage() method loads the file from the Storage and executes the AsynkTask.
Maybe could the overriding of the onRestart() method be a solution?
Or should I prevent the AsyncTask from loading the data already downloaded?
Thanks!
It would be better to prevent AsynkTask to download it again. Or better to clear your listview data. Means if use ArrayList with your List adapter then just clear it before storing putting new data.
I'm new to Fragments, and I have an problem with pressing back in some fragments.
MainActivity.java
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_main);
//Fragments are added programmatically here...
LoginFragment fragment = new LoginFragment();
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
android.support.v4.app.FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(R.id.content_frame, fragment);
transaction.commit();
}
#Override
public void onBackPressed() {
android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
Fragment curFrag;
curFrag = (Fragment) fm.findFragmentByTag("keuzen");
if (curFrag.isVisible() || curFrag.getTag() == "keuzen") {
Toast.makeText(getBaseContext(), "much keuzen", Toast.LENGTH_SHORT).show();
//keuzenFrag = null;
}
//Fragment curFrag = ((FragmentManager) fm.getFragments()).findFragmentByTag("single");
curFrag = (Fragment) fm.findFragmentByTag("single");
if (curFrag.isVisible()) {
Toast.makeText(getBaseContext(), "very single", Toast.LENGTH_SHORT).show();
}
}
I do not do anything with onBackPressed in the Fragments.
The wierd thing is, that only one Fragment with Async code, which crashes when I hit the back button.
But when I go to a other Fragment, and then back to the Fragment with Async code, and press the back button, it crashes.
The Async code in the fragment Fragment2
/**
* Async task class to get json by making HTTP call
* */
private class GetKeuzes extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(getActivity()); //KeuzenActivity.this
pDialog.setMessage("Laden...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url , ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
docent_opties = jsonObj.getJSONArray("docent_opties");
// loop door alle keuzes heen uit de JSON
for (int i = 0; i < docent_opties.length(); i++) {
JSONObject c = docent_opties.getJSONObject(i);
naam_cursus = c.getString(TB_naam_cursus);
naam_locatie = c.getString(TB_naam_locatie);
datum_vol = c.getString(TB_datum_vol);
naam_dagdeel = c.getString(TB_naam_dagdeel);
// Phone node is JSON Object
//JSONObject phone = c.getJSONObject(TAG_PHONE);
//String mobile = phone.getString(TAG_PHONE_MOBILE);
//String home = phone.getString(TAG_PHONE_HOME);
//String office = phone.getString(TAG_PHONE_OFFICE);
// temp HashMap voor enkele keuze
HashMap<String, String> keuze = new HashMap<String, String>();
// adding each child node to HashMap key => value
keuze.put(TB_naam_cursus, naam_cursus);
keuze.put(TB_naam_locatie, naam_locatie);
keuze.put(TB_datum_vol, datum_vol);
keuze.put(TB_naam_dagdeel, naam_dagdeel);
keuze.put("datum_dagdeel", datum_vol + ", '" + naam_dagdeel + "'");
keuzenList.add(keuze);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Gegevens ophalen via de url is mislukt");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
getActivity(), keuzenList,
R.layout.list_item, new String[] { TB_naam_cursus, TB_naam_locatie, "datum_dagdeel" }, new int[]
{ R.id.naamcursus, R.id.locatie, R.id.datum });
setListAdapter(adapter);
}
}
However, even when removing the Async code from the Fragment, the same problem still occurs...
So it shouldn't be the Async code.
This is the logcat:
http://pastebin.com/J5VhhCLG
Try using the FragmentManager's findFragmentById() or findFragmentByTag() methods, fragment Tag is your issue.
How are you adding the fragment:
FragmentTransaction.add(int containerViewId, Fragment fragment, String tag) ?
Remember fragment transaction runs asynchronously, make sure the tag is set.
Yes, its "find" not get, sorry about that.
The awnser was in the fact that I tried opening a other fragment from a fragment.
What you should do is make a function in your MainActivity:
public void openSesame(Bundle bundle) {
//Method2: pass data to fragment directly.
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
KeuzenFragment keuzenFragment = new KeuzenFragment();
keuzenFragment.setArguments(bundle);
android.support.v4.app.FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.content_frame, keuzenFragment, "keuzen").addToBackStack("keuzen");
transaction.remove(fragment1);
transaction.commit();
}
You probably want to change it up a bit for use with Fragments in the overload.
But that function goes in your MainActivity.
Call that function from the MainActivity like this:
((MainActivity)getActivity()).openSesame(bundle);
Done. :)