I am using BackendLess backend service, but my prob is (i guess) more to android/java. So even if u are not familiar with BackendLess, i guess u can help, if u know of course :)
I have there a Fragment that calls and opens a DialogFragment with a ListView.
Using there an iterator to retrieve the data. It brings each column from the data table as an Array.
I set an onClickedItemListener that when item is clicked, it send the value to a TextView in the Fragment it was called from.
The data comes in the wrong order - didnt get how to do a sortBy, that connects to the bigger prob i have there -
There is a column there named "PropertyTypes". It holds 4 strings, which are coming out in the opposite order that i need. I want the "A" first, and get:
"D"
"C"
"B"
"A"
ok, so far no big deal, i guess can be sorted out with a sortBy that i just dont know how to do.
But... what happens is that it sends the wrong value to the TextView, meaning, for example, when i press "C" it set "A" on the TextView and so on, and, when i press the last one, in this case "A", the app is crashing...
What the hell is going on there?? :))
Here is the code -
The DialogFragment code:
public class OptionDialogFragment extends DialogFragment implements
AdapterView.OnItemClickListener {
ListView mylist;
TextView chosenProperty;
TextView presentListItem;
ArrayAdapter adapter;
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//mylist.addHeaderView(inflater.inflate(R.layout.option_dialog_header, null, false));
View view = inflater.inflate(R.layout.option_dialog_content, null, false);
mylist = (ListView) view.findViewById(R.id.list);
View headerView = inflater.inflate(R.layout.option_dialog_header, mylist, false);
headerView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dismiss();
}
});
mylist.addHeaderView(headerView);
View footerView = inflater.inflate(R.layout.option_dialog_footer, mylist, false);
footerView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dismiss();
}
});
mylist.addFooterView(footerView);
chosenProperty = (TextView) view.findViewById(R.id.chosenProperty);
getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final ArrayList<String> propertyTypes = new ArrayList<String>();
final ArrayList<Integer> numOfRoomies = new ArrayList<Integer>();
Backendless.Data.of(DialogOptions.class).find(new AsyncCallback<BackendlessCollection<DialogOptions>>() {
#Override
public void handleResponse(final BackendlessCollection<DialogOptions> dialogOptions) {
final Iterator<DialogOptions> iterator = dialogOptions.getCurrentPage().iterator();
while (iterator.hasNext()) {
DialogOptions dialogOptionsObject = iterator.next();
propertyTypes.add(dialogOptionsObject.getPropertyTypes());
// numOfRoomies.add( dialogOptionsObject.getNumOfRoomies() );
}
adapter = new ArrayAdapter<String>(getActivity(), R.layout.dialog_option_list_item, R.id.presentListItem, propertyTypes);
mylist.setAdapter(adapter);
mylist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String chosenItem = propertyTypes.get(position);
Intent intent = new Intent();
intent.putExtra("chosenItem", chosenItem);
getTargetFragment().onActivityResult(
getTargetRequestCode(), Activity.RESULT_OK, intent);
dismiss();
}
});
}
#Override
public void handleFault(BackendlessFault fault) {
// TODO: make sure to log the exception, just in case
}
});
}
}
This is the Relevant code in the Fragment that calls the DialogFragment:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.find_a_place, container, false);
chosenProperty = (TextView) view.findViewById(R.id.chosenProperty);
return view;
}
#Override
public void onViewCreated(final View view, Bundle savedInstanceState) {
final LinearLayout propertTypes = (LinearLayout)view.findViewById(R.id.propertyTypes);
propertTypes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
showDialog(getActivity(), "OptionDialog");
}
});
}
private void showDialog(FragmentActivity activity, String optionDialog) {
android.support.v4.app.FragmentManager manager = getFragmentManager();
DialogFragment dialog = new OptionDialogFragment();
dialog.setTargetFragment(this, 0);
dialog.show(manager, "OptionDialog");
dialog.setCancelable(true);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case 0:
if (resultCode == Activity.RESULT_OK) {
if(data!=null){
// set value to your TextView
chosenProperty.setText(data.getStringExtra("chosenItem"));
}
}
break;
}
}
Thanks a lot in advance for any answer!!
Reference :-
https://backendless.com/feature-47-loading-data-objects-from-server-with-sorting/
To Sort while retrieving Object use :-
QueryOptions queryOptions = new QueryOptions();
queryOptions.addSortByOption( "created ASC" );
dataQuery.setQueryOptions( queryOptions );
Use Query as below:-
// fetch restaurants
Backendless.Data.of( Restaurant.class ).find( dataQuery, new AsyncCallback<BackendlessCollection<Restaurant>>(){
Related
I have Two Activity ( Activity A, Activity B) In Activity A i have a EditText,Button and Image View And in Activity B i have a Listview and the listView View Contain CustomXml with ImageView,TextView,and Another TextView
in Activity A, i enter List Name in Edit Text (Ex : Apple) and i Chose One Image ina GridView (Ex an Apple Image )
and i pass Both the Edittext and ImageView to a new Activity Where i want to Display Those names in ListView (Apple and Apple Image) How to DO that
i want to display something like this ( i get the Grocery List and Image From the Previous Activity and i want to display in ListView( in listview i extra add the items Count TEXTVIEW)
firstActivity.Java
done.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String itemname = listname.getText().toString();
if (!TextUtils.isEmpty(listname.getText().toString())) {
startActivity(new Intent(getContext(), CheckslateHome.class).putExtra("data", itemname).putExtra("image", imageRes));
dismiss();
} else {
Toast.makeText(getContext(), "List Name not Empty ", Toast.LENGTH_SHORT).show();
}
}
});
Second Activity
public class CheckslateHome extends AppCompatActivity {
TextView listcounts;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checkslate_home);
Bundle bundle = getIntent().getExtras();
if (bundle != null) {
String itemName= bundle.getString("data");
Int ItemImage = bundle.getString("Image");
**//How to Pass these Intents into the Custom ListView**
}
listcounts = findViewById(R.id.list_count);
ListView listView = findViewById(R.id.list1);
CustomAdpter customAdapter = new CustomAdpter();
listView.setAdapter(customAdapter);
}
public class CustomAdpter extends BaseAdapter {
private Context context;
private LayoutInflater layoutInflater;
#Override
public int getCount() {
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
if (view == null) {
view = layoutInflater.inflate(R.layout.rowlayout, viewGroup, false);
}
ImageView imageicons = view.findViewById(R.id.image_list);
TextView listnames = view.findViewById(R.id.list_name);
return view;
}
}
I Highly suggest using a combination of Fragments and navigation, in this way you can easily navigate through your app and send values between fragments using safe-args plugin
but if you persist on using activity, you should use startActivityForResult to call second activity.
I have a listview inside a fragment class. When a listview item is clicked another activity is opened. The xml file of that activity has 2 imageviews inside a scroll view. The images change with respect to every listview item clicked. No matter which listview item i click on it shows the same image view. In my case it shows the R.drawable.geet94 no mater which listview item i click.
public class urdufrag1 extends Fragment {
public urdufrag1() {
// Required empty public constructor
}
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
private static final String TAG = "urdufrag1";
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup
main_content, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.geetfrag_urdu, main_content, false);
final int[] menuImage = {R.drawable.tgeet94,
R.drawable.tgeet95,R.drawable.tgeet96,R.drawable.tgeet97};
final ListView listView = (ListView) view.findViewById(R.id.GeetListU);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Intent intent = new Intent(getActivity(), PackageG.class);
//intent.putExtra("GeetType",
listView.getItemAtPosition(position).toString());
//intent.putExtra("GeetType", Integer.toString(position));
intent.putExtra("position", Integer.toString(position));
startActivity(intent);
}
});
AdapterGeetUrdu adapter = new AdapterGeetUrdu(getContext(), menuImage);
listView.setAdapter(adapter);
// Inflate the layout for this fragment
return view;
}
}
Second Activity
public class PackageG extends AppCompatActivity {
ImageView img1, img2;
PhotoViewAttacher mAttacher;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_package_g);
img1 = (ImageView) findViewById(R.id.imageView8);
img2 = (ImageView) findViewById(R.id.imageView9);
mAttacher = new PhotoViewAttacher(img1);
mAttacher = new PhotoViewAttacher(img2);
Intent intent = this.getIntent();
if(intent != null){
Integer position = intent.getExtras().getInt("position");
switch (position){
case 0: img1.setImageResource(R.drawable.geet94);
img2.setImageResource(R.drawable.geet94_1);
break;
case 1: img1.setImageResource(R.drawable.geet95);
img2.setImageResource(R.drawable.geet95_1);
break;
case 2: img1.setImageResource(R.drawable.geet96);
img2.setImageResource(R.drawable.geet96_1);
break;
default:
img1.setImageResource(R.drawable.carol);
img2.setImageResource(R.drawable.carol);
break;
}
}
mAttacher.update();
}
}
intent.putExtra("position", Integer.toString(position));
This is where you made mistake.
Change this to, and will solve your problem.
intent.putExtra("position", position);
Because in your activity you are expecting an integer but you are passing string position from listview. Change the click listener as per the below code
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Intent intent = new Intent(getActivity(), PackageG.class);
intent.putExtra("position", position);
startActivity(intent);
}
});
In here I am trying to make OnItemLongClick, I tried doing it in ListActivity before and that's working.
Now I am trying to make one inside a Fragment, but I get an error here and there, I need some advice/suggestion/answer to solve the error, or the correct way to implement the method.
In the ListActivity (working):
public class ViewData extends ListActivity implements OnItemLongClickListener {
//init controller
private DBDataSource dataSource;
//init arraylist
private ArrayList<Barang> values;
private Button delButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewdata);
dataSource = new DBDataSource(this);
// open controller
dataSource.open();
// get values
values = dataSource.getAllBarang();
// insert data to array adapter
ArrayAdapter<Barang> adapter = new ArrayAdapter<Barang>(this,
android.R.layout.simple_list_item_1, values);
// set adapter in list
setListAdapter(adapter);
// listview for set onItemLongClickListener
ListView lv = (ListView) findViewById(android.R.id.list);
lv.setOnItemLongClickListener(this);
}
//if user longclick
#Override
public boolean onItemLongClick(final AdapterView<?> adapter, View v, int pos,
final long id) {
//tampilkan alert dialog
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.dialog_view);
dialog.setTitle("Pilih Aksi");
dialog.show();
final Barang b = (Barang) getListAdapter().getItem(pos);
delButton = (Button) dialog.findViewById(R.id.button_delete_data);
//apabila tombol delete di klik
delButton.setOnClickListener(
new OnClickListener()
{
#Override
public void onClick(View v) {
// Delete barang
dataSource.deleteBarang(b.getId());
dialog.dismiss();
finish();
startActivity(getIntent());
}
}
);
return true;
}
}
The Fragment version (still giving an error) :
public class Menu_Riwayat extends Fragment {
//init controller
private DBDataSource dataSource;
//init arraylist
private ArrayList<Investasi_DB> values;
static ListView lv;
private Button button_hapus;
static LinearLayout mLinear;
#Nullable
#Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
mLinear = (LinearLayout) inflater.inflate(R.layout.viewdata, container, false);
lv = (ListView) mLinear.findViewById(R.id.list);
dataSource = new DBDataSource(getActivity());
// open controller
dataSource.open();
// get values
values = dataSource.getAllInvestasi_DB();
// insert data to array adapter
ArrayAdapter<Investasi_DB> adapter = new ArrayAdapter<Investasi_DB>(getActivity(),
android.R.layout.simple_list_item_1, values);
// set adapter in list
lv.setAdapter(adapter);
return mLinear;
// ERROR IN THIS PART BELOW, not sure what to change "this" with
lv.setOnItemClickListener(this);
}
public boolean onItemLongClick(final AdapterView<?> adapter, View v, int pos,
final long id) {
//tampilkan alert dialog
final Dialog dialog = new Dialog(getActivity());
dialog.setContentView(R.layout.dialog_view);
dialog.setTitle("Pilihan");
dialog.show();
// ERROR IN THIS PART BELOW, not sure how to implement "getListAdapter()" inside fragment
final Investasi_DB b = (Investasi_DB) getListAdapter().getItem(pos);
button_hapus = (Button) dialog.findViewById(R.id.button_hapus);
button_hapus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dataSource.deleteInvestasi_DB(b.getId());
dialog.dismiss();
getActivity().finish();
// ERROR IN THIS PART BELOW, the "getIntent()" part
startActivity(getIntent());
}
});
return true;
}
}
I need help to solve the error (correct way to implement it):
getListAdapter(), getIntent(), and this in lv.setOnItemClickListener(this);
EDITED PART AFTER SOME SUGGESTION :
so now i make it like this
public class Menu_Riwayat extends Fragment {
//inisialisasi kontroller
private DBDataSource dataSource;
//inisialisasi arraylist
private ArrayList<Investasi_DB> values;
static ListView lv;
private Button button_hapus;
static LinearLayout mLinear;
#Nullable
#Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
mLinear = (LinearLayout) inflater.inflate(R.layout.viewdata, container, false);
lv = (ListView) mLinear.findViewById(R.id.list);
dataSource = new DBDataSource(getActivity());
// buka kontroller
dataSource.open();
// ambil semua data barang
values = dataSource.getAllInvestasi_DB();
// masukkan data barang ke array adapter
ArrayAdapter<Investasi_DB> adapter = new ArrayAdapter<Investasi_DB>(getActivity(),
android.R.layout.simple_list_item_1, values);
// set adapter pada list
lv.setAdapter(adapter);
//lv.setOnItemLongClickListener(this);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
final Dialog dialog = new Dialog(getActivity());
dialog.setContentView(R.layout.dialog_view);
dialog.setTitle("Pilihan");
dialog.show();
final Investasi_DB b = (Investasi_DB) lv.getItemAtPosition(position);
button_hapus = (Button) dialog.findViewById(R.id.button_hapus);
button_hapus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dataSource.deleteInvestasi_DB(b.getId());
dialog.dismiss();
getActivity().finish();
}
});
}
});
return mLinear;
}
its working, but the apps close itself after i click the button (i think because of getActivity().finish();), any idea about that ?
I need help to solve the error (correct way to implement it):
getListAdapter(), getIntent(), and this in
lv.setOnItemClickListener(this);
if with this you want to access a Context, you can use getActivity(). Fragment is not a Context
In setOnItemClickListener(this);, this refers to the current instance. With that line you are implying that this is also implementing the OnItemClickListener interface. Which is not true. You need yo add implement OnItemClickListener to your Fragment class.
getListAdapter():
instead of getListAdapter() you can use the ListView to retrieve the item at position, since you are already keeping a reference as member. Change
final Investasi_DB b = (Investasi_DB) getListAdapter().getItem(pos);
with
final Investasi_DB b = (Investasi_DB) lv.getItemAtPosition(pos);
why do you need this line startActivity(getIntent());?
With the following code I'm correctly receiving a dynamic list from mysql db and putting the elements in a listview.
public class MenuActivity extends ListActivity implements FetchDataListener {
private ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
initView();
}
private void initView() {
// show progress dialog
dialog = ProgressDialog.show(this, "", "Loading..");
String url = "http://www.*********.php";
FetchDataTask task = new FetchDataTask(this);
task.execute(url);
}
#Override
public void onFetchComplete(List<Application> data) {
// dismiss the progress dialog
if(dialog != null) dialog.dismiss();
// create new adapter
ApplicationAdapter adapter = new ApplicationAdapter(this, data);
// set the adapter to list
setListAdapter(adapter);
}
#Override
public void onFetchFailure(String msg) {
// dismiss the progress dialog
if(dialog != null) dialog.dismiss();
// show failure message
Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
}
This is my array adapter:
public class ApplicationAdapter extends ArrayAdapter<Application>{
private List<Application> items;
public ApplicationAdapter(Context context, List<Application> items) {
super(context, R.layout.app_cat_list, items);
this.items = items;
}
#Override
public int getCount() {
return items.size();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if(v == null) {
LayoutInflater li = LayoutInflater.from(getContext());
v = li.inflate(R.layout.app_cat_list, null);
}
Application app = items.get(position);
if(app != null) {
TextView titleText = (TextView)v.findViewById(R.id.titleTxt);
if(titleText != null) titleText.setText(app.getTitle());
}
return v;
}
Now I want to click on single row and open another activity passing some values via intent extra.
Where should I implement click listener?
I'm pretty sure it should be inserted in the "getView" but how I pass the app.getTitle() via intent? I know how pass intent extra in general, tried but no click happens.
Any help would be appreciated, thanks
Now I want to click on single row and open another activity passing
some values via intent extra. Where should I implement click listener?
No need to add OnItemClickListener because extending ListActivity in MenuActivity so just override onListItemClick method for handing ListView row click:
#Override
public void onListItemClick(ListView l, View view, int position, long id) {
// your code here...
}
how I pass the app.getTitle() via intent?
Get selected row TextView value in onListItemClick using view parameter:
TextView txtView=(TextView)v.findViewById(R.id.titleTxt);
String selectedText=txtView.getText().toString();
Use selectedText for sending value with Intent in Next Activity
Put this in your getView()
v.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent =new Intent(context, YourActivity.class);
context.startActivity(intent);
}
});
There can be multiple ways and following is one of them:
Set onItemClickListner on your listview in your activity and it will give you a callback i.e onListItemClick. But as you said you want the title their you have to set tag on the convertView in the getView method like covertView.setTag("itemTitle"); and in your onListItemClick get the tag from view and convert it to the title like this v.getTag().toString(); and set it any where you want.
follwoing is the full code:
#Override
public void onListItemClick(ListView l, View view, int position, long id) {
String title = view.getTag().toString();
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("title", title);
startActivity(intent);
// your code here... }
Please post if got stuck anywhere.
Someone know how SimpleCursorAdapter get database info with no have any content provider interaction? I searched in the docs, but i don't understand yet
I make the Udacity course for learn Android and I use this Fragment, but i can't understand the flow.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mForecastAdapter = new SimpleCursorAdapter(
getActivity(),
R.layout.list_item_forecast,
null,
// the column names to use to fill the textviews
new String[]{WeatherContract.WeatherEntry.COLUMN_DATETEXT,
WeatherContract.WeatherEntry.COLUMN_SHORT_DESC,
WeatherContract.WeatherEntry.COLUMN_MAX_TEMP,
WeatherContract.WeatherEntry.COLUMN_MIN_TEMP
},
// the textviews to fill with the data pulled from the columns above
new int[]{R.id.list_item_date_textview,
R.id.list_item_forecast_textview,
R.id.list_item_high_textview,
R.id.list_item_low_textview
},
0
);
mForecastAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder(){
#Override
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
boolean isMetric = FormatServices.isMetric(getActivity());
switch (columnIndex) {
case COL_WEATHER_MAX_TEMP:
case COL_WEATHER_MIN_TEMP: {
// we have to do some formatting and possibly a conversion
((TextView) view).setText(FormatServices.formatTemperature(
cursor.getDouble(columnIndex), isMetric));
return true;
}
case COL_WEATHER_DATE: {
String dateString = cursor.getString(columnIndex);
TextView dateView = (TextView) view;
dateView.setText(FormatServices.formatDate(dateString));
return true;
}
}
return false;
}
});
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
final ListView listView = (ListView) rootView.findViewById(R.id.listview_forecast);
listView.setAdapter(mForecastAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
/*String forecast = mForecastAdapter.getItem(position);
Toast.makeText(getActivity(), forecast, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getActivity(), DetailActivity.class)
.putExtra(Intent.EXTRA_TEXT, forecast);
startActivity(intent);*/
}
});
return rootView;
}
Someone can help-me to understand SimpleCursorAdapter flow?
I could understand how it works SimpleCursorAdapter. I using the Loader to get information and added after
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
mForecastAdapter.swapCursor(data);
}