Java 使用微调器在活动之间传输数据

我是Android开发的新手

我正在尝试将所选数据从多个微调器（搜索活动）传输到另一个活动（JSON搜索结果活动）

在最后，我有一个打开搜索结果的按钮

  Bundle extras = getIntent().getExtras();
  if(extras!=null){


            Integer item = extras.getInt("setwhat");
            //Use a switch(item) here to switch to different links based on selection
            TextView tv = (TextView) findViewById(R.id.tvtv);
            tv.setText("Another Activity, Item is :" + item.toString());

搜索活动： 我有java微调器

ArrayAdapter<CharSequence> whatlist = ArrayAdapter.createFromResource(this, 
R.array.whatlist, android.R.layout.simple_spinner_item);
whatlist.setDropDownViewResource(R.layout.spinner_style);
spwhat = (Spinner) findViewById(R.id.spWhat);
spwhat.setAdapter(whatlist);
spwhat.setOnItemSelectedListener(new MyOnItemSelectedListener());

这在搜索结果中

  Bundle extras = getIntent().getExtras();
  if(extras!=null){


            Integer item = extras.getInt("setwhat");
            //Use a switch(item) here to switch to different links based on selection
            TextView tv = (TextView) findViewById(R.id.tvtv);
            tv.setText("Another Activity, Item is :" + item.toString());

文本不会改变。 我在网上尝试过任何教程，并在这里搜索了几个小时的解决方案。。

---

有人可以帮忙吗？

您甚至不需要为微调器设置侦听器。只需将按钮的onclick更改为：

btnsearch = (Button)findViewById(R.id.btnSearch); 
btnsearch.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {

        Spinner spwhat = (Spinner) findViewById(R.id.spWhat);

        Intent ia = new Intent(SearchActivity.this, SearchResult.class);
        ia.putExtra("setwhat", spwhat.getSelectedItem().toString());
        startActivity(ia);
    }
});

btnsearch = (Button)findViewById(R.id.btnSearch); 
btnsearch.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {

        Spinner spwhat = (Spinner) findViewById(R.id.spWhat);

        Intent ia = new Intent(SearchActivity.this, SearchResult.class);
        ia.putExtra("setwhat", spwhat.getSelectedItem().toString());
        startActivity(ia);
    }
});