【发布时间】:2014-03-03 12:48:18
【问题描述】:
我正在开发一个应用程序,我必须从服务器接收数据,我已成功读取数据。在这里我有问题我从 AsyncTask 中编写的服务器代码接收数据,并将数据从 AsyncTask 发送到我的活动,这里我只发送三个数据中的一个,我的 json 对象有 3 个对象。我可以在 AsyncTask 中获取 3 个对象但没有得到在活动中
我的异步任务
public class ReceivingLatLongAsync extends AsyncTask<Void, Void, Void> {
private ProgressDialog pDialog;
Context mContext;
JSONArray jsonArryDetails=null;
public static final String DETAILS = "locations";
public static final String LAT = "lat";
public static final String LNG = "lng";
public static final String ADDRESS = "address";
public static final String CTIME = "ctime";
private String lat1;
private String lng1;
private String address1;
private String time1;
public ReceivingLatLongAsync(Context context){
this.mContext = context;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(mContext);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
ServiceHandler serviceHandler= new ServiceHandler();
String jSonString = `serviceHandler.makeServiceCall
(TrafficConstants.RECIEVE_LATLON_POL_URL, ServiceHandler.POST);`
Log.e("Response: ", "> " + jSonString);
if(jSonString != null){
try {
JSONObject jsonObject = new JSONObject(jSonString);
jsonArryDetails = jsonObject.getJSONArray(DETAILS);
for(int i = 0;i<jsonArryDetails.length();i++){
JSONObject mapDetails =
jsonArryDetails.getJSONObject(0);
lat1 = mapDetails.getString(LAT);
lng1 = mapDetails.getString(LNG);
address1 = mapDetails.getString(ADDRESS);
time1 = mapDetails.getString(CTIME);
Log.e("ADDRESS1", address1);
Log.e("TIME2",time1);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pDialog.dismiss();
Intent intent = new Intent(mContext,GetLatLongForTPActivity.class);
intent.putExtra("LAT", lat1);
intent.putExtra("LNG", lng1);
intent.putExtra("ADDRESS", address1);
intent.putExtra("time",time1);
mContext.startActivity(intent);
}
}
我的活动
public class GetLatLongForTPActivity extends FragmentActivity
implements LocationListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_get_lat_long_for_tp);
timeEdit = (EditText)findViewById(R.id.timeId);
submitBtn = (Button)findViewById(R.id.subId);
Intent intent = getIntent();
String anotherLAT=intent.getStringExtra("LAT");
String anotherLNG=intent.getStringExtra("LNG");
Log.e(" NEW LATLONG",anotherLAT);
}
【问题讨论】:
-
尝试 startActivity(intent); 而不是 mContext.startActivity(intent);
-
您必须发送一个对象数组,用这些对象创建一个类并发送该数组,要发送您的数组,您必须实现
parcelable -
解析选项,试试Gson:stackoverflow.com/questions/21480634/…