On default Android Back Button Customiztion

 How To Override the “Back” button so it doesn't Finish() my  Activity?

public void onBackPressed() {
   Intent setIntent = new Intent(Intent.ACTION_MAIN);
   setIntent.addCategory(Intent.CATEGORY_HOME);
   setIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
   startActivity(setIntent);
}

Android Back Button to specific activity

public void onBackPressed() {

  super.onBackPressed();

  startActivity(new Intent(ThisActivity.this, NextActivity.class)); 

  finish();

  }

How to disable back button in android

@Override
public void onBackPressed() {
    // do nothing.
}