在我的应用程序中，我收到服务器的响应，并在listview中显示它，现在我正在尝试的是当用户点击listitem它应该获取它的位置并需要将其发送到下一个活动，但它无法正常工作。
以下是mt代码段
btn_go.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager.getNetworkInfo(
ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED
|| connectivityManager.getNetworkInfo(
ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED) {
// listView1.removeAllViews();
listView1.setAdapter(null);
arraylist_oper = new ArrayList<HashMap<String, String>>();
// listView1.notify();
new getOperationalControlList().execute();
} catch (Exception e) {
e.printStackTrace();
}
}
});
listView1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
// TODO Auto-generated method stub
//qr = ((String) listView1.getItemAtPosition(position)).toString();
Intent intent=new Intent(OperationalControl.this,DispatchTracking.class);
intent.putExtra("arrow_val", "2");
intent.putExtra("qrcodes", qr);
Toast.makeText(OperationalControl.this, qr, Toast.LENGTH_LONG).show();
startActivity(intent);
}
});
}
class getOperationalControlList extends AsyncTask<String, String, String> {
private String msg = "";
int register_error = 1;
JSONArray operation;
JSONObject obc;
String error;
String access_token, office_name, office_id;
String user_id;
String name;
private ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog = new ProgressDialog(OperationalControl.this);
progressDialog.setCancelable(true);
progressDialog.setMessage("Loading...");
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setProgress(0);
progressDialog.show();
noresponse.setVisibility(View.GONE);
}
@Override
protected String doInBackground(String... params) {
JSONObject jsonObjSend;
String content = null;
arraylist_oper = new ArrayList<HashMap<String, String>>();
try {
consts.pref = getSharedPreferences("pref", MODE_PRIVATE);
consts.editor = consts.pref.edit();
String OperationalControlList_URL = ((consts.pref
.getString(consts.Base_URL,
consts.Base_URL)) + consts.OperationalControlList_URL);
Log.d("OperationalControlList_URL url:",
OperationalControlList_URL);
arraylist = new ArrayList<HashMap<String, String>>();
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(OperationalControlList_URL);
System.out.println("URL :-"
+ consts.OperationalControlList_URL.toString());
user_id = consts.pref.getString("user_id", "");
access_token = consts.pref.getString("access_token", "");
office_id = consts.pref.getString("office_id", "");
date = date_dropdown.getText().toString();
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(
5);
nameValuePair.add(new BasicNameValuePair("user_id", user_id));
nameValuePair.add(new BasicNameValuePair("access_token",
access_token));
nameValuePair.add(new BasicNameValuePair("filter", filter));
nameValuePair
.add(new BasicNameValuePair("office_id", office_id));
nameValuePair.add(new BasicNameValuePair("date", date));
// Encoding POST data
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
System.out.println("USER_ID : " + user_id.toString());
System.out.println("access_token : "
+ access_token.toString());
System.out.println("filter : " + filter.toString());
System.out.println("office_id : " + office_id.toString());
System.out.println("date : " + date.toString());
content = EntityUtils.toString(entity);
Log.d("aaa", content);
jsonObjSend = new JSONObject(content.toString());
if (jsonObjSend.getString("status").equals("2")) {
register_error = 1;
error = jsonObjSend.getString("error");
if (error.equals("3")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("4")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("5")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("6")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("7")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("8")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("9")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("10")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("11")) {
msg = jsonObjSend.getString("message");
} else if (error.equals("12")) {
msg = jsonObjSend.getString("message");
} else {
msg = jsonObjSend.getString("message");
}
// {"status":1,"message":"There is no activity of the selected day and filtering otpions"}
} else if (jsonObjSend.getString("status").equals("1")) {
if (jsonObjSend.has("message"))
msg = jsonObjSend.getString("message");
// msg = jsonObjSend.getString("message");
register_error = 0;
operation = new JSONArray();
if (jsonObjSend.has("list")) {
operation = jsonObjSend.getJSONArray("list");
// arraylist_oper = new ArrayList<HashMap<String,
// String>>();
for (int i = 0; i < operation.length(); i++) {
map = new HashMap<String, String>();
qr = operation.getJSONObject(i)
.getString("qrcode");
type = operation.getJSONObject(i)
.getString("type").toString();
Log.d("Types", type);
String origin = operation.getJSONObject(i)
.getString("origin");
String destiny = operation.getJSONObject(i)
.getString("destiny");
String stop_status = operation.getJSONObject(i)
.getString("stop_status");
String stop_status_name = operation
.getJSONObject(i).getString(
"stop_status_name");
String stop_status_color = operation
.getJSONObject(i).getString(
"stop_status_color");
map.put("qrcode", qr);
map.put("type", type);
map.put("origin", origin);
map.put("destiny", destiny);
map.put("stop_status", stop_status);
map.put("stop_status_name", stop_status_name);
map.put("stop_status_color", stop_status_color);
// map.put("status_name", status_name);
arraylist_oper.add(map);
Log.d("qrcode:", qr + " type: " + type
+ " origine: " + origin);
}
} else {
msg = jsonObjSend.getString("message");
}
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e1) {
e1.printStackTrace();
}
return content;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
if (error.equals("6")) {
Intent intent=new Intent(OperationalControl.this,LoginActivity.class);
startActivity(intent);
OperationalControl.this.finish();
}
try {
if (arraylist_oper.size() > 0) {
Operational_LazyAdapter adpt = new Operational_LazyAdapter(
getApplicationContext(), arraylist_oper);
listView1.setAdapter(adpt);
// Toast.makeText(getApplicationContext(), msg,
// Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Office não definir corretamente ou" + msg,
Toast.LENGTH_LONG).show();
noresponse.setVisibility(View.VISIBLE);
}
} catch (Exception e) {
e.printStackTrace();
}
}
响应
{"status":1,
"list":[{
"qrcode":"#00000757-00000277-700101-0000000040",
"type":"Tipo de Opera\u00e7\u00e3o: Chegada",
"origin":"Origem: ARMAMAR (757)",
"destiny":"Destino: REGUA (277)",
"stop_status":6,
"stop_status_name":"Finalizado",
"stop_status_color":"#cccccc"
},
{
"qrcode":"#00000278-00000277-700101-0000000041",
"type":"Tipo de Opera\u00e7\u00e3o: Chegada",
"origin":"Origem: LAMEGO (278)",
"destiny":"Destino: REGUA (277)",
"stop_status":6,
"stop_status_name":"Finalizado",
"stop_status_color":"#cccccc"
}]
}
答案 0 :(得分：1)
在列表项单击侦听器上创建的Intent中，您应该添加所需的所有变量。
在你的情况下添加
intent.putExtra("position", position);
在您的DispatchTracking活动中使用
int position = getIntent().getExtras().getInt("position");
答案 1 :(得分：0)
您需要将if((a*a*i*j) <= m*n){
System.out.println("Entered if block");
if(a*i <= m){
//to check weather it is entering if()
System.out.println("true");
i+=1;
}
if(a*j <= n ){
System.out.println("false");
//to check weather it is entering if()
j+=1;
}
System.out.println("i is:"+ i +"j is:"+j);
}
HashMap传递给下一个Arraylist。像，
Activity并在您的下一个intent.putExtra("myList",arraylist_oper);
中检索为
Activity您需要通过Intent intent = getIntent();
ArrayList<HashMap<String,String>> mylist = (ArrayList<HashMap<String, String>>)intent.getSerializableExtra("myList");
下一个活动
qrCode现在在下一个活动中检索
intent.putExtra("qrcodes", arraylist_oper.get(position).get("qrcode")));
现在使用For循环检查第二个活动中的可复原的arraylist。
String qrCode = intent.getStringExtra("qrcodes");