Android Disable back button

Question

I want to disable back button in my application. And if not possible, then I want to open MainActivity when click on it. Is there any solution? If yes help me?

Answer 1

simply write these lines

 @Override
public void onBackPressed() {

}

Answer 2

You can simply use this if you want to disable completely back button:

 @Override
    public void onBackPressed() {
        moveTaskToBack(false);
    }

Answer 3

you can use this code for onback button click to intent another activity.

 @Override
    public void onBackPressed() {
        Intent intent=new Intent(Caly_act.this,MainActivity_tab.class);
        startActivity(intent);
        finish();
    }