Android message between 2 activities problem

I have the following code in one activity:

        in= new Intent(ThisActivity.this,AnotherActivity.class);
        imgarr = new ImageView[55];

        imgarr[0]=(ImageView) findViewById(R.id.species3);
        imgarr[0].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                b.putString("specno",Integer.toString(0)); in.putExtras(b);
                in.setClassName("com.DuckHuntersJournal","com.DuckHuntersJournal._1_TagKillActivity");
                startActivity(in);
            }
        });

And this code in another:

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.menu1tagkill);

        if ((savedInstanceState != null) && savedInstanceState.containsKey("specn开发者_高级运维o")) {
        Log.e(tag, "intent from species not null");
        species.setText(savedInstanceState.getString("specno"));
    }

However, savedInstanceState is null.

Why am I not getting any data back from the first activity?

You need to use :

   getIntent().getExtras().getString("specno");

in order to get the passed string from the first activity.

EDIT: I'm not sure what you are trying to do... for getting data from another Activity that started the current one you need to use getIntent().getExtras().

For saving your current stat when the Activity goes to background you save the data in the onSaveInstanceState() method and then in the onCreate(Bundle savedInstance) method you get the saved data from the savedInstance parameter.

You'll need to do the following in your receiving Activity:

String species = getIntent().getStringExtra("specno");