Develop Reference

Hide Keyboard and show it by button

I am creating a program that write in EditText by barcode reader so I don't want to show the keyboard immediately even if I focused on it I don't wanna it to be visible , I need to press a button to show keyboard only to Edit sometimes .
and thanks

I would disable the EditText button from the beginning:
editText.setEnabled(false);
And to answer your question, yes. Even if it is disabled, you can change the text. Disabled only means user can't change it. You can programmatically edit it.
Then when the button is pressed:
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
editText.setEnabled(true);
editText.requestFocus();
}
});
This should automatically show the keyboard when the button is pressed.
Bonus:
If you want to disable the EditText once the editing is done, you can do this:
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus) {
editText.setEnabled(false);
}
}
});

Show/Hide hint text for editText when enable fullsreen mode

How show hint text when open edittext in fullscreen mode?
I'm can show hint text with OnFocusChangeListener.
editChangeName.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View view, boolean b) {
editChangeName.setHint(b ? getResources().getString(R.string.name) : "");
}
});
But.
How hide hint text after closing edittext?

// assuming you have a EditText view with id
View viewById = getView().findViewById(R.id.editTextId);
if(viewById!=null) {
// set listener to this view "many views could share one listener"
viewById.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
// if view match id && has no focus
if(v.getId() == R.id.editTextId && !hasFocus)
// clear hint
((EditText) v).setHint(null);
// else show hint
}
});
}
hasFocus <- as name says
has (true) -> show
doesn't have (false) -> hide
if you are not sure if view by id is one you assign to an edit text do a check ( double check will not hurt)
if (EditText.class.isAssignableFrom(v.getClass()))
// do cast
EditText editText = (EditText) v;
This code is correct. But. How hide hinttext, after closing softkeyboard.. edittext have focus – Eugenu Yansky
Detecting when user has dismissed the soft keyboard
How to remove focus without setting focus to another control?
How to clear focus and remove keyboard on Android?

Remove Focus change Listener of a view in android

I have added FocusChangeListener to EditText. like
etZip.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus)
{
callAreaDetailService(zipCode,false);
}
}
});
Now If I have focus on etZip and I click on Button to go to anotherActivity. etZip loses focus and show Response alert in Next Activity.
I know I can add a boolean flag for not calling service if button is clicked. But I am sure there must be an android build in method to stop focus change.
There is no function like etZip.removeFocusChangeListener . So is there any way to do this using Android SDK.

Android - Do something *after* text is changed in EditText

I build an android application. I have an EditText. I want to save changes (or anything else) automatically after the user change the text.
Now I use
editText.addTextChangedListener(textWatcher);
and
TextWatcher textWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
...
}
But it saves the changes after every little change (add \ remove a letter), and I want that it'll be saved only after the user finished (closed the keyboard, clicked on a different edittext, etc. ).
How can I do that?

Implement onFocusChange of setOnFocusChangeListener and there's a boolean parameter for hasFocus. When this is false, you've lost focus to another control and you should save the data of editext. for example
EditText editText= (EditText) findViewById(R.id.editText);
editText.setOnFocusChangeListener(new OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus) {
//SAVE THE DATA
}
}
});
Implement setOnFocusChangeListener for all EditTexts and you should handle Back Press event too. If the user change the data of edittext and didn't goto another EditText and pressed back then edited vallue will not save. So should use onKeyDown or onBackPressed too

As Kotlin is now official android language:
var editText = findViewById<EditText>(R.id.editText)
editText.onFocusChangeListener = OnFocusChangeListener { _, hasFocus ->
if (!hasFocus) {
//SAVE THE DATA
}
}

Single click edittext

How can make an EditText have a onClick event so that on single click an action is done.
private void addListenerOnButton() {
dateChanger = (EditText) findViewById(R.id.date_iWant);
dateChanger.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
}
this is not working as excepted....single click gives just the onscreen keypad but not the datepicker dialog which appears only if i double click

if we just add android:focusableInTouchMode="false" in edittext on layout page it should work in a singleclick on its onclicklistener. no need to handle onFocusChangeListener.

Change your code from an onClickListener to an OnFocusChangeListener.
private void addListenerOnButton() {
dateChanger = (EditText) findViewById(R.id.date_iWant);
dateChanger.setOnFocusChangeListener(new OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus) {
showDialog(DATE_DIALOG_ID);
}
}
});
}

EditText is not meant for singleClick.
I mean you should not use Click Listener with it.
rather you can do like,
Use onFocusChangeListener which is also not 100% correct approach.
Best would be instead the EditText use one TextView write onClick of that and if needed give a background image to that TextView.

Rewrite
I have an EditText that launches a dialog when the user either clicks it once or navigates to it with a trackball / directional pad. I use this approach:
Use an OnFocusChangeListener for gaining focus to open the dialog.
Override dismissDialog() to clear the focus from the EditText when the user closes the dialog, preventing the user from entering text without the dialog (as far as I can tell)
.
I have also tried this (however I now remember this method did respond to trackball movement):
Use an OnClickListener for touch events.
Set setFocusable(false) to prevent user input.
Hope that helps.