Activity間転送について

button_open = (Button) findViewById(R.id.button_open);// 

        button_open.setOnClickListener(new OnClickListener() {  // 

            

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                Intent intent1 = new Intent();       // Activity  

                intent1.setClass(Mainactivity.this, NewActivity.class);

                // Activity  ， Activity, Activity

                intent1.putExtra("1", " ");    // , ， ，   

                startActivity(intent1);// Activity  

            }

        });

1 Intent intent1 = new Intent();

2                 intent1.setClass(Mainactivity.this, NewActivity.class);

3                 intent1.putExtra("1", " ");

4                 startActivity(intent1);

1 Intent intent_get = getIntent();

2         String str = intent_get.getStringExtra("1");

3         text_1.setText(str);