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我有我的課是基於在線教程，我還沒有完全理解它（工作），但它的工作。從列表視圖中獲取特定的json對象點擊
它填充列表視圖，現在我想要獲取id並在更詳細的活動上顯示與該id相關的數據。
我已經獲得該項目的ID我正在點擊：
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id) {
Log.e("item clicks", "selected: " + position);
}
});
但現在，我沒有得到我怎麼會做這個，我得到的點擊位置的數據。
我有一個內部類「GetObras」，但我不能使用這些變量從它在我的onCreate，我試圖讓他們全球等
public class MainActivity extends ActionBarActivity implements SearchView.OnQueryTextListener{
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
private ListView list;
private static String url = "http://ploran.gear.host/scriptobras6.php";
ArrayList<HashMap<String, String>> obrasList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
obrasList = new ArrayList<HashMap<String, String>>();
list = (ListView)findViewById(R.id.list1);
new GetObras().execute();
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id) {
Log.e("item clicks", "selected: " + position);
}
});
}
private class GetObras extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
//JSONObject jsonObj = new JSONObject(jsonStr);
JSONArray obras = new JSONArray(jsonStr);
// Getting JSON Array node
//JSONArray obras = jsonObj.getJSONArray("obras");
// looping through All
for (int i = 0; i < obras.length(); i++) {
JSONObject c = obras.getJSONObject(i);
String id = c.getString("Id");
String nomeObra = c.getString("NomeObra");
String idCliente = c.getString("idCliente");
String DataLevantamento = c.getString("DataPLevantamento");
String DataRealizacao = c.getString("DataRLevantamento");
String Estado = c.getString("Estado");
String DataMateriais = c.getString("DataRMateriais");
String DataInicioObra = c.getString("DataInicioObra");
String DataConclusao = c.getString("DataConclusao");
String DataVestoria = c.getString("DataVestoria");
String Obs = c.getString("Obs");
String Prompor = c.getString("Prompor");
String Levantpor = c.getString("Levantpor");
String executpor = c.getString("executpor");
// tmp hash map for single contact
HashMap<String, String> obra = new HashMap<>();
// adding each child node to HashMap key => value
obra.put("Id", id);
obra.put("nomeObra", nomeObra);
obra.put("idCliente", idCliente);
obra.put("DataLevantamento", DataLevantamento);
obra.put("DataRealizacao", DataRealizacao);
obra.put("Estado", Estado);
obra.put("DataMateriais", DataMateriais);
obra.put("DataIncioObra", DataInicioObra);
obra.put("DataConclusao", DataConclusao);
obra.put("DataVestoria", DataVestoria);
obra.put("Obs", Obs);
obra.put("Prompor", Prompor);
obra.put("Levantpor", Levantpor);
obra.put("executpor", executpor);
// adding contact to contact list
obrasList.add(obra);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, obrasList,
R.layout.list_item, new String[]{"nomeObra", "idCliente",
"Estado"}, new int[]{R.id.name,
R.id.email, R.id.mobile});
list.setAdapter(adapter);
}
}
List<String> cities;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_search, menu);
MenuItem searchItem = menu.findItem(R.id.search);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
// User pressed the search button
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
// User changed the text
return false;
}
}
如果我認爲是正確的，我可以得到JsonArray從GetObras中的doInBackground方法執行：
JSONObject c = obras.getJSONObject(position);
謝謝。