Android : Check for Empty EditText fails

I've tried everything from matching strings, to using TextUtils.isEmpty. No matter what I do, b is always true (even when edittext is purposely left blank) which allows the code to proceed to the next steps (this is a Madlib app).

If anybody can see why the code isn't properly checking for blank edittext's and displaying the Please Fill In All Fields" toast when one is blank, it would be very appreciated. Thanks. Sorry for the messy code.

public class Madlibs extends Fragment {


    switch (((MainActivity) getActivity()).getStory()) {
    case 0:
        output.setText(Stories[0]);
        title = Titles[0];
        actionBar.setTitle(title);
        editTextNumber = 12;

        addEdit = new BootstrapEditText[editTextNumber];
        for (int i = 0; i < addEdit.length; i++) {
            addEdit[i] = new BootstrapEditText(getActivity());
            l_layout.addView(addEdit[i]);
            params.setMargins(0, 20, 0, 20);
            addEdit[i].setLayoutParams(params);
            addEdit[i].setId(i);
        }
        addEdit[0].setHint("Name of Sickness");
        addEdit[1].setHint("Adjective");
        addEdit[2].setHint("Name of Boy");
        addEdit[3].setHint("Body Part");
        addEdit[4].setHint("Color");
        addEdit[5].setHint("Animal");
        addEdit[6].setHint("Article of Clothing");
        addEdit[7].setHint("Relative");
        addEdit[8].setHint("Adjective");
        addEdit[9].setHint("Article of Clothing");
        addEdit[10].setHint("Body Part");
        addEdit[11].setHint("Number");

        break;
    case 1:
        // fragment = new Madlibs();
        break;
    case 2:
        // fragment = new MadlibsSaved();
    }

    convert = (BootstrapButton) view.findViewById(R.id.convert);
    convert.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            int i;
            String s;

            for (i = 0; i < addEdit.length; i++) {
                s = addEdit[i].getText().toString().trim();

                if (s.isEmpty() || s.length() == 0 || s.equals("") || s == null) {
                    b = false;
                }
                else
                {
                    b = true;
                }
            }
            if (b = true) {
                gather();
                postIt();
                outputText = output.getText().toString();
            } else {
                Toast.makeText(getActivity().getApplicationContext(),
                        "Please Fill In All Fields", Toast.LENGTH_LONG)
                        .show();
            }

        }
    });