Question

I am creating a simple game which after a 5 second timer expires and two conditions are checked, condition one is to level up, the intent starts the same activity and I intended to increment my variable level by one every time the player met the condition which increased the game level.

The second condition starts another activity, which is the fail screen.

I didn’t want a different screen for every level up increment, when I can just load the same activity and continue going through the conditions, but as the Activity starts again the level variable resets to its initialised value, the game never leaves level 1. Is there any way to pass a variable a value to an activity when starting it?

Here is the code I have for my Activity:

public class FirstOneActivity extends Activity {
/** Called when the activity is first created. */


MediaPlayer  ourSong;
int counter;
Button add;
Thread timer;
TextView display;
TextView lvl;
int level = 1;
int time;



@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ourSong = MediaPlayer.create(FirstOneActivity.this, R.raw.click);
    counter = 0;

    add = (Button) findViewById (R.id.bAdd);

    display = (TextView) findViewById (R.id.tvDisplay);
    lvl = (TextView) findViewById (R.id.lvldisplay);




    add.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            counter++;
            //ourSong.start();
            display.setText("Your total is "+ counter);

            if(counter ==1)

            { 

                set();
                timer.start();
            }

        }
    });


     timer = new Thread(){
        public void run(){
            try{
                sleep(time);
            }catch(InterruptedException e){
                e.printStackTrace();
            }finally{


                test();


            }
        }


    };

}


public void test(){

 if(counter>= 10 && level == 1 || counter>= 15 && level == 2)
    {    
        Intent openSplash = new Intent("com.deucalion0.FIRSTONE");
        startActivity(openSplash);
        level++;
    }

     else if(counter<10 && level == 1 || counter< 15 && level == 2){

        Intent openNext = new Intent("com.deucalion0.NEXT");
        startActivity(openNext);
    }


}


public void set(){


      if(level == 1)
    {   lvl.setText("Level is "+ level);
        time = 5000;
    }

    else if (level == 2)
    {lvl.setText("Level is "+level);
        time = 5000;
    }



}


}

Any advice is appreciated.

Answer 1

Sure. To put some data in the intent, just use the putExtra method, like so:

openNext.putExtra("levelNum", 2);

Then in the called Activity, retrieve the bundle of extras and pull out the one you want, like this:

// in onCreate() method
int levelNum = getIntent().getExtras().getInt("levelNum");