Question

（首先，我很抱歉我的英文不好，请修理一下）

嗨，我可以从数据库中填充listview，如果我点击任何listview项目，它会通过相关的“id”转到“Detail.class”。

问题是当我重新填充课程（lesson =“WHERE deck ='”+ lesson +“'”;）时，listview正确填充但listview index / id？不是更改，当我单击listview项目时，“Detail.class”正在打开，但错误的ID。

-----数据库助手类---

    if (lesson.equals("")) {
        lesson= "";

    } else {
        lesson= " WHERE deck='" + MainActivity.lesson + "'";

    }


    String selectQuery = "select word, id,word,typ from TAB" + lesson + " group by id";

---- MainActivity类----

private void loadListview() {
    Database db = new Database(getApplicationContext());
    List<String> labels = db.makeList();

    dataAdapter = new ArrayAdapter<String>(this, R.layout.listview_spc, labels);

    Listview1 = (ListView) findViewById(R.id.liAll);
    Listview1.setAdapter(dataAdapter);

}


    Listview1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                                long arg3) {

                Intent intent = new Intent(getApplicationContext(), Detail.class); 
                intent.putExtra("id", (int) word_ids[arg2]); // I think the problem is here.
                startActivity(intent);
                  }
    });

Answer 1

将clicklistner代码替换为以下内容，

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                        Intent intent = new Intent(getActivity(), Detail.class);
                        intent.putExtra("Id",labels.get(position).getId());
                        startActivity(intent);
                    }
                });

通过正确的ID重新填充listview？

1 个答案: