Set Focus on Edittext

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 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 set focus on the last character of EditText on Android

After the call to requestFocus(), you can set the position of the cursor at the end of the EditText as follows:

EditText editText = (EditText) findViewById(R.id.textId);
int pos = editText.getText().length();
editText.setSelection(pos);

set cursor focus on other edittext in android after done on keyboard button

You can try this one:

  edtwo.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            edtwo.setText("");
            edone.setText("");
            InputMethodManager imm = (InputMethodManager)v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(v.getWindowToken(), 0);

            edone.requestFocus();
            return true;
        }

    });

Set focus to the EditText upon clicking a button

This code for OnFocusChangeListener has to be modified little bit, for anonymous classes you need to have final reference of any object which you wish to modify, since you want to modify EditText

final int[] etColorId = new int[] {R.id.etColor1, R.id.etColor2, R.id.etColor3, R.id.etColor4, R.id.etColor5,
            R.id.etColor6, R.id.etColor7, R.id.etColor8, R.id.etColor9, R.id.etColor10, R.id.etColor11,
            R.id.etColor12, R.id.etColor13, R.id.etColor14, R.id.etColor15};

Now for OnClickListener do like this

for (int i=0;i<btnEditId.length;i++) 
{
    final int counter=i;
    int button=btnEditId[i];
    findViewById(button).setOnClickListener(new OnClickListener() 
    {

        @Override
        public void onClick(View v) 
        {

            // HERE v refers to button itself on which you clicked, 
            // you need to update get edit text so
            // based on ith position accessing the same edit as the button correspond too
            EditText edt=etColorId[counter];
            edt.setEnabled(true);
            edt.requestFocus();
            // and you are DONE!!!
        }
    });
}

UPDATE:

 new OnFocusChangeListener() 
 {

            @Override
            public void onFocusChange(View v, boolean hasFocus) 
            {

                if(!hasFocus) 
                { // lost focus
                       v.setEnabled(false);
                }
                else
                {
                    //you are already enabling on button click
                }
            }
  });

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;
    }
});