Why is the else part of my code not triggering the reset function of the game?

I want the tic tac toe game to reset and show Draw if it's tied

But this doesn't seem to work.

package com.codewithmischief.tictactoe;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
public class MainActivity extends AppCompatActivity {
boolean gameActive = true;
int activePlayer = 0;
int[] gameState = {2,2,2,2,2,2,2,2,2};
int[][] winPosition={
{0,1,2},{3,4,5},{6,7,8},
{0,3,6},{1,4,7},{6,7,8},
{0,4,8},{6,4,2}
};
public void tapBtn(View view) {
ImageView img = (ImageView) view;
int tappedImg = Integer.parseInt(img.getTag().toString());
if(!gameActive){
gameReset(view);
}
if(gameState[tappedImg] == 2) {
gameState[tappedImg] = activePlayer;
if (activePlayer == 0) {
img.setImageResource(R.drawable.x);
activePlayer = 1;
TextView status = findViewById(R.id.status);
status.setText("O's Turn");
} else {
img.setImageResource(R.drawable.o);
activePlayer = 0;
TextView status = findViewById(R.id.status);
status.setText("X's Turn");
}
}
//check if someone has won
for(int[] winPos : winPosition){
if(gameState[winPos[0]]==gameState[winPos[1]]
&& gameState[winPos[1]]==gameState[winPos[2]]
&& gameState[winPos[0]]!=2)
{
String winner;
gameActive=false;
if(gameState[winPos[0]]==0){
winner = "X won";
}
else if(gameState[winPos[0]]==1){
winner = "O won";
}
else{
winner="draw"; //this one is not working also i want it to reset the game when draw.
}
TextView status=findViewById(R.id.status);
status.setText(winner);
}
}
}
public void gameReset(View view) {
gameActive = true;
activePlayer = 0;
for(int i=0; i<gameState.length;i++){
gameState[i]=2;
}
((ImageView)findViewById(R.id.imageView0)).setImageResource(0);
((ImageView)findViewById(R.id.imageView1)).setImageResource(0);
((ImageView)findViewById(R.id.imageView2)).setImageResource(0);
((ImageView)findViewById(R.id.imageView3)).setImageResource(0);
((ImageView)findViewById(R.id.imageView4)).setImageResource(0);
((ImageView)findViewById(R.id.imageView5)).setImageResource(0);
((ImageView)findViewById(R.id.imageView6)).setImageResource(0);
((ImageView)findViewById(R.id.imageView7)).setImageResource(0);
((ImageView)findViewById(R.id.imageView8)).setImageResource(0);
TextView status = findViewById(R.id.status);
status.setText("X's Turn");
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

Just inside the for loop, you check

if (gameState[winPos[0]] == gameState[winPos[1]]
 && gameState[winPos[1]] == gameState[winPos[2]]
 && gameState[winPos[0]] != 2)

This means that somebody must have won: there are three of the same value in a row, and the value is not an empty tile.

When you then have your inner if statement:

if (gameState[winPos[0]] == 0) {
    winner = "X won";
} else if (gameState[winPos[0]] == 1) {
    winner = "O won";
} els e{
    winner="draw"; //this one is not working also i want it to reset the game when draw.
}

Either X has won, or O has won, but it cannot be a draw, because the outer if statement has already determined that somebody has won.

To check for a draw, you just need to have the code exit the for loop without having set a winner, and then check that none of the tiles are empty.

EDIT: as requested, adding my suggestion as two code fragments.

First, replace the for loop with the following code. Notice that I pulled the winner string out of the loop and I added a break to exit the loop as soon as a winner is found. Similarly, I pulled the part that fetches and sets the label's text value out of the loop, so that it is not called for every iteration.

String winner = null;
for (int[] winPos : winPosition) {
  // Did somebody win?
  if (gameState[winPos[0]] == gameState[winPos[1]]
      && gameState[winPos[1]] == gameState[winPos[2]]
      && gameState[winPos[0]] != 2) {
    gameActive = false;
    if (gameState[winPos[0]] == 0) {
      winner = "X won";
    } else if (gameState[winPos[0]] == 1) {
      winner = "O won";
    }
    // We found the winner, so exit the loop
    break;
  }
}
// If there is no winner yet, it might be a draw
if (winner == null && boardIsFull(gameState)) {
  winner = "draw";
}
// Only set the label text if there is a value to set
if (winner != null) {
  TextView status = findViewById(R.id.status);
  status.setText(winner);
}

You will then need an implementation of the boardIsFull method, which is relatively straightforward:

private boolean boardIsFull(int[] gameState) {
  for (int i = 0; i < gameState.length; ++i) {
    if (gameState[i] == 2) {
      return false;
    }
  }
  return true;
}

In your code:

   for(int[] winPos : winPosition){
if(gameState[winPos[0]]==gameState[winPos[1]]
&& gameState[winPos[1]]==gameState[winPos[2]]
/* A */        && gameState[winPos[0]]!=2)
{
String winner;
gameActive=false;
if(gameState[winPos[0]]==0){
winner = "X won";
}
else if(gameState[winPos[0]]==1){
winner = "O won";
}
/* B */    else{
winner="draw"; //this one is not working also i want it to reset the game when draw.
}
TextView status=findViewById(R.id.status);
status.setText(winner);
}

Line A means that the following code is only executed when gameState[winPos[0]] is not 2.

Line B however can only be reached if gameState[winPos[0]] is equal to 2, which cannot be due to the condition on line A.