传递方：

//点击btn_sub传递 fieldHeight.getText()和 fieldWeight.getText()

 private void setListeners()
    {
     btn_sub.setOnClickListener(calrBMI); 
    }
    private OnClickListener calrBMI = new OnClickListener()
    {
     public void onClick(View v)
     {

       Intent intent = new Intent();
       Bundle bundle = new Bundle();
       bundle.putString("key_height", fieldHeight.getText().toString());
       bundle.putString("key_weight", fieldWeight.getText().toString());
       intent.setClass(ActivityMain.this,Report.class);
       intent.putExtras(bundle);
       startActivity(intent);         
     }    
    };

接收方：

         Bundle bundle = new Bundle();
         bundle = this.getIntent().getExtras();
         double height = Double.parseDouble(bundle.getString("key_height"))/100;
         double weight = Double.parseDouble(bundle.getString("key_weight"));