How to Set the Focus (And Display the Keyboard) on My Edittext Programmatically

How can I set the focus (and display the keyboard) on my EditText programmatically

Try this:

EditText editText = (EditText) findViewById(R.id.myTextViewId);
editText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);

http://developer.android.com/reference/android/view/View.html#requestFocus()

How to show soft-keyboard when edittext is focused

To force the soft keyboard to appear, you can use

EditText yourEditText= (EditText) findViewById(R.id.yourEditText);
yourEditText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(yourEditText, InputMethodManager.SHOW_IMPLICIT);

And for removing the focus on EditText, sadly you need to have a dummy View to grab focus.

To close it you can use

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(yourEditText.getWindowToken(), 0);

This works for using it in a dialog

public void showKeyboard(){
    InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}

public void closeKeyboard(){
    InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputMethodManager.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
}

Android: force keyboard to appear and focus on EditText

Thanks to @Shubham's link I was able to figure it out. The solution was not the answer given in the link, however. It was the second answer.

editText.requestFocus();
InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);

Edit:

once using the above solution the keyboard will remain on the screen until a user presses either the back button or the home button (sometimes it takes a few times). To remove the keyboard use this

imm.toggleSoftInputFromWindow(rootView.getWindowToken(), 0,0);

in my case rootView is the rootView of the current activity. I have not tested this to see if this will work on child views.

How to set focus to editText when fragment start?

editText.requestFocus() will put focus to your View if it is focusable . But I guess you want to show keyboard when it is focused. If I am right then the following code might work for you.

editText.requestFocus();
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);

The code is from this post.
You can also check Android Developers for details.

How to programmatically set and remove Focus on edit text on click of a button

I think you confused setting focus and showing and hiding keyboard so try my answer:

 case R.id.add_timeline_status_IBTN:

    time_statusTV.setFocusable(true);
    time_statusTV.requestFocus();
    InputMethodManager imm = (InputMethodManager)this.getSystemService(Service.INPUT_METHOD_SERVICE);
    imm.showSoftInput( time_statusTV, 0);

and for clearing it:

imm.hideSoftInputFromWindow(your edittext.getWindowToken(), 0);

so your code must be something like:

  time_statusTV = (EditText) rootView.findViewById(R.id.time_statusTV);
  time_statusTV.setOnKeyListener(new OnKeyListener() {

    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if ((event.getAction() == KeyEvent.ACTION_DOWN)
                && (keyCode == KeyEvent.KEYCODE_ENTER)) {

            imm.hideSoftInputFromWindow( time_statusTV.getWindowToken(), 0); 
            time_statusTV.clearFocus();
        }
        return false;
    }
});

Android TextField : set focus + soft input programmatically

Good sir, try this:

edittext.setFocusableInTouchMode(true);
edittext.requestFocus();

I'm not sure, but this might be required on some phones (some of the older devices):

final InputMethodManager inputMethodManager = (InputMethodManager) context
                .getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.showSoftInput(edittext, InputMethodManager.SHOW_IMPLICIT);

Android: show soft keyboard automatically when focus is on an EditText

You can create a focus listener on the EditText on the AlertDialog, then get the AlertDialog's Window. From there you can make the soft keyboard show by calling setSoftInputMode.

final AlertDialog dialog = ...;

editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
        }
    }
});

How to set focus on editText Preference and show keyboard automatically?

in your preference fragment that extends from PreferenceFragmentCompat override onResume() with below

@Override
public void onResume() {
    super.onResume();
    Preference search = findPreference(getString(R.string.setting_edit_text_key));
    search.performClick();
}

Illustration: you inflate the EditTextPreference using its key, and perform a click on it.

force soft keyboard to show when EditText gets focus

This is how I show the ketyboard:

EditText yourEditText= (EditText) findViewById(R.id.yourEditText);
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(yourEditText, InputMethodManager.SHOW_IMPLICIT);