Hi guys I have a question:
In short, I have a listview, with a searchbar on top of it, I am also able to start my other activities after filtering the results etc; basically everything works fine and sweet.
My question is this:
When launching the main activity the listview is visible (obviously enough). Is there a way to make the listview invisible and only after typing in the searchbar to make the results of the listview become visible? Something like an in app search thing; or am I just imagining things?
I hope that I am not too confusing with what I wrote above.
I am looking forward to your replies and I thank you in advance.
Go this way:
set your listview visibility to gone or invisible from your xml file:
android:visibility="gone"
Now apply textwatcher on searchbar edittext
edittext.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
//put your search logic here and populate listview.
//after populating listview set its visibility to visible
listView.setVisibility(View.VISIBLE);
//and set listview visibility to GONE again when user erase all text from search edittext
if(s.length() == 0){
listView.setVisibility(View.GONE);
} else {
listView.setVisibility(View.VISIBLE);
}
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
Related
I am developing an application with auto-complete text-view. My very first page contains auto-complete text-view which is working as SEARCH field. The moment my application launches, keyboard is also displaying and which hides my other contents in my first page.
I am sure that this will make user to feel bad. I need to overcome this. I need to lose focus of auto-complete text view initially and when user tap on it, keyboard should appear.
This is the listener code of my autocomplete text view.
AutoCompleteTextView jsearch;
jsearch = (AutoCompleteTextView) findViewById(R.id.asearch);
jsearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable editable) {
// TODO Auto-generated method stub
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
String newText = s.toString();
if(validNet()) {
new getJsonCategory().execute(newText);
mProgressBar.setVisibility(View.VISIBLE);
} else alertBox();
}
});
Two ways you can do.
Step 1:on launching the activity you can stop the popup of key board by the following code paste after oncreate:
getActivity().getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
Step 2:
In code make Autocompletetextview .setFocusable(false);
Let me know is it use full or on.so that i can help you more
now i am making a program in android using edittext and listview. I want to search the listview item using edittext above. After populate data to listview, when user type text in edittext, the listview will scroll to the position start with that text. Example: i have item: apple, application, book, boy, car, cat, cash..... when i type b in edittext then listview will scroll to book. I use the listview.setSelection(position), but because the amount of my data is over 30,000 , so when i use the following code it is slow to find data.
Are there any solutions or any other method to do this?
Here is my code:
YOUR_EDITTEXT.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
//LOGIC MAY DIFFER ACCORDING TO YOUR REQUIREMENT..
int POSITION = 0;
for(int i =0;i<list.size();i++) {
if(list.get(i).startsWith(s.toString()))
{
POSITION = i;
break;
}
}
listview.smoothScrollToPosition(POSITION);
}
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
});
You could take a different approach and load your list data with an AutoCompleteTextView. This would provide your required functionality and it's designed to handle large data sets.
Example:
https://developers.google.com/places/training/autocomplete-android
Is your list sorted? If it is, you can use binary sort on the datasource.
I have this application in which I create multiple EditTexts dynamically. The amount depends on user input. I am trying to allow the focus to change to the next edittext after two characters have been entered. I have this so far:
for(EditText editText : editTextList ) {
editText.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
if(s.toString().length() == 2) {
//code to change focus to next edit text goes here
}
}
});
}
The first problem is that this could potentially create many instances of TextWatcher if the user enters a large number (average in this context would probably be 100-600 EditText fields).
The second problem is how would I go about changing focus in the afterTextChanged method because I would want to change the focus to the next EditText away from the one that is currently being represented inside the loop.
Should I not be concerned about the potential performance issues of multiple TextWatcher objects? Should I scrap this whole implementation and focus elsewhere? Any suggestions will be greatly appreciated.
As you may have a lot of EditTexts at runtime i would suggest you to use maxlength attribute of EditText in this way you will restrict user to enter only 2 characters.
like this
EditText editText = new EditText(this);
int maxLength = 2;
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLength)});
Now add next button in your keyboard like this
yourEditText.setImeOptions(EditorInfo.IME_ACTION_NEXT);
It is the default behavior of next button to change focus to the immediate next view which takes input being in the same parent layout.
My app should open a file inside an edittext to show it to the user. If user want to modify it just press inside textwiew and write it. After do this when back button is pushed, if the text was modify, the changes should be saved, else, just close the current activity and go to parent.
There's a way to see if the text was edited?
My idea is to explicitly compare file and edittext character length, but there's something better than this "rude" method?
You can use a TextWatcher:
boolean changed = false;
EditText edit = (EditText)findViewById(R.id.medittext);
edit.addTextChangedListener(new TextWatcher() {
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
changed = true;
}
});
Just comparing the length might result in a false negative if the changes are of the same length as deletions in the text.
When the user presses back, just check if changed is true. This might result in a false positive if the user made an edit and then undid it, but it is better to have a few false positives than to lose user changes.
Nothing better actually you have to compare the text and not the length. The user could just replace a word. A TextWatcher would tell you that a user is editing but he just may change and change it back. So you really need to compare strings.
I have an edit text meant for searching purpose. I have added
searchET.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
//intent to another page where i show my search result
}
});
The problem is:
When I give a search string for eg: "fort" i get the required result in the next page. But when I press the back button, it doesnt move to the previous page on its first click. I will have to press back button 4 times to goto the previous page. This is because my search string is of length 4 and each time a value is entered into the edittext, the textchangelistener is called. How can I solve this issue? Please reply. Thanks in advance.
Depending on what you need, you can go to the next page based on some condition. For example, start a timer, and if the afterTextChanged is called before the timer expires, reset the timer. Alternatively, you can have a button 'Search' where the user explicitly indicates that he's done typing the word.
If you can share the required behaviour, better alternatives can be suggested.
actually when you want to decide when the text ends there is no point of including an addTextChangedListener. To improve the UI you could add this button into ur edit text .refer this : edittext with view