//can you help me completing it ??? import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.widget.EditText; public class CrosswordActivity extends AppCompatActivity { private CrosswordPuzzle puzzle; private EditText[][] cells; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // create the puzzle and get references to the EditText views puzzle = new CrosswordPuzzle(); cells = new EditText[10][10]; for (int i = 0; i < 10; i++) { for (int j = 0; j < 10; j++) { String cellId = "cell_" + i + "_" + j; int resId = getResources().getIdentifier(cellId, "id", getPackageName()); cells[i][j] = findViewById(resId); } } // fill in some words on the puzzle puzzle.fillInWord("HELLO", 1, 0, true); puzzle.fillInWord("WORLD", 3, 3, false); // check for correct answers as the user types them in for (int i = 0; i < 10; i++) { for (int j = 0; j < 10; j++) { final int row = i; final int col = j; cells[i][j].addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { String answer = charSequence.toString(); if (answer.length() > 0) { puzzle.fillInWord(answer.toUpperCase(), row, col, true); if (puzzle.isValidWord(answer.toUpperCase())) { cells[row][col].setTextColor(getResources().getColor(android.R.color.holo_green_dark)); } else { cells[row][col].setTextColor(getResources().getColor(android.R.color.holo_red_dark)); } } else { puzzle.fillInWord(" ", row, col, true); cells[row][col].setTextColor(getResources().getColor(android.R.color.black)); } } @Override public void afterTextChanged(Editable editable) { } }); } } } ///////////////////////////////////////////////////////// public class CrosswordPuzzle { private char[][] puzzle; public CrosswordPuzzle() { // initialize the puzzle with empty cells puzzle = new char[10][10]; for (int i = 0; i < 10; i++) { for (int j = 0; j < 10; j++) { puzzle[i][j] = ' '; } } } public void fillInWord(String word, int row, int col, boolean isVertical) { // fill in the word on the puzzle for (int i = 0; i < word.length(); i++) { int r = row + (isVertical ? i : 0); int c = col + (isVertical ? 0 : i); puzzle[r][c] = word.charAt(i); } } public boolean isValidWord(String word) { // check if the word is valid (exists in the puzzle) for (int i = 0; i < puzzle.length; i++) { for (int j = 0; j < puzzle[i].length; j++) { if (puzzle[i][j] == word.charAt(0)) { // check horizontally if (j + word.length() <= puzzle[i].length) { boolean valid = true; for (int k = 1; k < word.length(); k++) { if (puzzle[i][j+k] != word.charAt(k)) { valid = false; break; } } if (valid) { return true; } } // check vertically if (i + word.length() <= puzzle.length) { boolean valid = true; for (int k = 1; k < word.length(); k++) { if (puzzle[i+k][j] != word.charAt(k)) { valid = false; break; } } if (valid) { return true; } } } } } return false; } }

help me to develop java crossword mobile