getExtras()数据传递

这里写代码片public void onClick(View v) {                Intent intent=new Intent();                intent.setClass(MainActivity.this,main2.class);                intent.putExtra("data","我是xx");                startActivity(intent);----------setContentView(R.layout.layout2);       Bundle bundle=  getIntent().getExtras();        String data= bundle.getString("data");       Log.d("d",data);