android - 如何从android ListView 中获取值？

Question

我是android新手。我正在从mysql获取数据并在listview中显示它。事情工作正常，但现在我想在用户单击listview(Row)时将值传递给intent。我已经实现了setOnItemClickListener。但是 ListView 是动态的，所以我不知道如何获取值并将其传递给 Intent 。

提前致谢

public class AdminNotice extends Activity {

    private String[] navMenuTitles;
    private TypedArray navMenuIcons;
    private EditText editTextName;
    SharedPreferences sp;
    private String jsonResult;
    private ListView listView;
    private Button b;
    EditText etname, et;
    TextView tv;
    String myJSON;
    private static final String TAG = "MainActivity.java";
    private static final String TAG_NAME = "notice";
    private static final String TAG_DATE = "ndate";
    ProgressBar progressBar;
    Date date;
    JSONArray peoples = null;

    ArrayList<HashMap<String, String>> personList;

    ListView list;



    public static final String USER_NAME = "USERNAME";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.noticelist);
        progressBar = (ProgressBar) findViewById(R.id.progressbar);


        //SharedPreferences myprefs= getSharedPreferences("user", MODE_WORLD_READABLE);
        // String session_id= myprefs.getString("session_id", null);


        //TextView textView = (TextView) findViewById(R.id.fname);

        //textView.setText("Welcome "+session_id);





        navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

        navMenuIcons = getResources().obtainTypedArray(R.array.nav_drawer_icons);
        // load icons from
        // strings.xml


        list = (ListView) findViewById(R.id.listView);
        personList = new ArrayList<HashMap<String,String>>();

        getData();




    }



    //send messages stop

    //get json data start
    protected void showList(){
        try {
            JSONArray peoples = new JSONArray(myJSON);


            for(int i=0;i<peoples.length();i++){
                JSONObject c = peoples.getJSONObject(i);
                String name=null, date=null;

                /*if(c==null){
                    ProgressDialog progress = new ProgressDialog(this);
                    progress.setTitle("Loading");
                    progress.setMessage("Wait while loading...");
                    progress.show();
                }*/



                if(c.has("notice"))
                if(c.has("ndate"))




                progressBar.setVisibility(View.GONE);
                name = c.getString("notice");
                date = c.getString("ndate");




                HashMap<String,String> persons = new HashMap<String,String>();


                persons.put(TAG_NAME,name);
                persons.put(TAG_DATE,date);
                personList.add(persons);
            }



            ListAdapter adapter = new SimpleAdapter(
                    AdminNotice.this, personList, R.layout.list_item1,
                    new String[]{TAG_NAME,TAG_DATE},
                    new int[]{R.id.name, R.id.date}
            );

            list.setAdapter(adapter);

            list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int position,
                                        long id) {





                        /*ModelClass obj = getItem(position);
                        String name = obj.getName();*/


                    // Simple Toast to show the position Selected
                    Log.d("SELECT_POSITION", "Position For this List Item = " + position);
                }

            });

           /* list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                public void onItemClick(AdapterView parent, View view, int position, long id) {


                    Toast.makeText(getApplicationContext(), ((TextView) view).getText(), Toast.LENGTH_SHORT).show();

                }

            });*/





        } catch (JSONException e) {
            Log.i("tagconvertstr", "["+myJSON+"]");
        }
    }





    public void getData(){
        class GetDataJSON extends AsyncTask<String, Void, String>{


            @Override
            protected String doInBackground(String... params) {

                SharedPreferences myprefs= getSharedPreferences("user", MODE_WORLD_READABLE);
                String session_id= myprefs.getString("session_id", null);

                InputStream inputStream = null;
                String result = null;
                try {

                    String postReceiverUrl = "http://notice.php";

                    // HttpClient
                    HttpClient httpClient = new DefaultHttpClient();

                    // post header
                    HttpPost httpPost = new HttpPost(postReceiverUrl);

                    // add your data
                    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
                    nameValuePairs.add(new BasicNameValuePair("username", session_id));

                    httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                    HttpResponse response = httpClient.execute(httpPost);
                    HttpEntity resEntity = response.getEntity();

                    inputStream = resEntity.getContent();
                    // json is UTF-8 by default
                    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
                    StringBuilder sb = new StringBuilder();

                    String line = null;
                    while ((line = reader.readLine()) != null)
                    {
                        sb.append(line + "\n");
                    }
                    result = sb.toString();
                } catch (Exception e) {
                    Log.i("tagconvertstr", "["+result+"]");
                    System.out.println(e);
                }
                finally {
                    try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
                }
                return result;
            }

            @Override
            protected void onPostExecute(String result){
                myJSON = result;
                showList();
            }
        }
        GetDataJSON g = new GetDataJSON();
        g.execute();
    }
    //get json data stop

}

Answer 1

在 ListView 中的 onItemClickListener

Intent intent=new Intent(currentyactivty.this,secondactiviy.class);
intent.putExtra("TAG_NAME",  personList.get(position).get(TAG_NAME));
startActivity(intent);

在 onCreate 方法的第二个 Activity 中获取数据

String data;
Intent in=getIntent();

if(in!=null && in.hasExtra("TAG_NAME")){
    data=in.getStringArrayExtra("TAG_NAME");
}