android - 无法从数据库中获取数据并有意传递

Question

我在第一个 Activity 中从 MySQL 请求数据

protected Void doInBackground(String... params) {
        // TODO Auto-generated method stub

        String url = "http://myhost/app/get.php?id=" + name_id;

        JSONArray data;
        try {
            resultServer = getJSONUrl(url);
            data = new JSONArray(resultServer);

            MyArrList = new ArrayList<HashMap<String, Object>>();
            HashMap<String, Object> map;

            for(int i = 0; i < data.length(); i++){
                JSONObject c = data.getJSONObject(i);
                map = new HashMap<String, Object>();
                map.put("id", (String)c.getString("id"));
                map.put("name", (String)c.getString("name"));
                map.put("description", (String)c.getString("description"));

                MyArrList.add(map);
            }                               
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

然后像这样将此信息传递给另一个 Activity

Intent newActivity = new Intent(act1.this,act2.class);

       newActivity.putExtra("Name", Name);
       newActivity.putExtra("tableDescription", description);
       startActivity(newActivity);
       finish();

在下一个 Activity 中我得到这样的信息

    @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.information);

    String textDescription, name;
    TextView txtView;

    txtView = (TextView) findViewById(R.id.text);
    txtView = (TextView) findViewById(R.id.name);

    Intent intent= getIntent();
    textDescription = getIntent().getStringExtra("description");
    ((TextView)findViewById(R.id.text)).setText(textDescription+"");
    name = getIntent().getStringExtra("Name");
    ((TextView)findViewById(R.id.name)).setText(name+"");
} 

所以在第二个 Activity 中 Name 在那里，但是 textDescription 显示为 null，我确定数据库中的该列中有文本。

Answer 1

你的问题出在

 newActivity.putExtra("tableDescription", description);

 textDescription = getIntent().getStringExtra("description");

应该是

textDescription = getIntent().getStringExtra("tableDescription");