how to parse json data and display in listview using aysnctask
Question
I am parsing data and displaying it in ListView . I am done with my parsing successfully but I can't display that parsed data in ListView . I don't know what error I am getting. It automatically comes to home screen and I cant see even the error. I want to display the datas in ListView , those datas which I added in my HashMap .
private class Getiingbusdetails extends AsyncTask<Void, Void, Void> {
private static String url="http://runtowin.in/v2/ap/route_api.php?apicode=runtowin002&dateOfJourney=2017-01-01&originId=8&destinationId=5";
String response = " ";
String jsonstr;
ProgressDialog dialogProgress = new ProgressDialog(Searchbus.this);
AndroidHttpClient mClient = AndroidHttpClient.newInstance("");
JSONArray array3;
protected void onPreExecute(){
dialogProgress.setCancelable(true);
dialogProgress.setMessage("Please wait..");
dialogProgress.setIndeterminate(false);
dialogProgress.show();
}
@Override
protected Void doInBackground(Void... params) {
HttpGet request = new HttpGet(url);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try {
response = mClient.execute(request, responseHandler);
} catch (ClientProtocolException exception) {
exception.printStackTrace();
return null;
} catch (IOException exception) {
exception.printStackTrace();
return null;
}
Log.i("url", "" + url);
Log.i("routes", "" + response);
jsonstr = response;
if (jsonstr != null) {
try {
JSONArray array1 = new JSONArray(jsonstr);
for (int i = 0; i < array1.length(); i++) {
JSONObject obj1 = array1.getJSONObject(i);
JSONArray array2 = obj1.getJSONArray("bus_schedule");
for (int j = 0; j < array2.length(); j++) {
JSONObject obj2 = array2.getJSONObject(j);
array3 = obj2.getJSONArray("bus_route");
HashMap<String, String> map = new HashMap<>();
for (int k = 0; k < array3.length(); k++) {
JSONObject obj3 = array3.getJSONObject(k);
String s1 = obj3.getString("serviceDate");
String s2 = obj3.getString("amenities");
String s3 = obj3.getString("startCityName");
String s44 = obj3.getString("departureTime");
String s4=dateformatter(s44);
String s5 = obj3.getString("fare");
String s6 = obj3.getString("endCityName");
String s77 = obj3.getString("arrivalTime");
String s7=dateformatter(s77);
String s8 = obj3.getString("operatorName");
String s9 = obj3.getString("bus_id");
String s10 = obj3.getString("journeyHours");
String s11 = obj3.getString("available_seat");
String s12 = obj3.getString("total_seats");
String s13 = obj3.getString("seat_type");
String s14 = (""+s4+" - "+""+s7);
Log.e("servicedate"+s1,"amenities"+s2+"startcityname"+s3);
map.put(SERVICEDATE,s1);
map.put(AMENITIES,s2);
map.put(DEPARTTIME,s4);
map.put(FARE,s5);
map.put(ARRIVALTIME,s7);
map.put(JOURNEYHOURS,s10);
map.put(SEATSAVAILABLE,s12);
map.put(TOTALTIMING,s14);
busdetails.add(map);
}
JSONArray array4 = obj2.getJSONArray("boardingPoint");
for (int l = 0; l < array4.length(); l++) {
JSONObject obj4 = array4.getJSONObject(l);
String s14 = obj4.getString("boardingPointName");
String s15 = obj4.getString("boardingPointContact");
String s16 = obj4.getString("boardingPointTime");
String s17 = obj4.getString("boardingPointId");
String s18 = obj4.getString("BusId");
}
}
}
Log.e("response", array1.toString());
} catch (JSONException e) {
e.printStackTrace();
Log.e("log_tag", "Error parsing data "+e.toString());
}
}
return null;
}
protected void onPostExecute(Void result){
try {
/*
if (array3.equals("Bus not available.")) {
*/
dialogProgress.dismiss();
ListAdapter adapter = new SimpleAdapter(Searchbus.this, busdetails, R.layout.busdetailslistview,
new String[]{TOTALTIMING, FARE, JOURNEYHOURS, SEATSAVAILABLE, AMENITIES, DEPARTTIME},
new int[]{R.id.bustiming, R.id.fare_amt, R.id.journey_hours, R.id.seats_avail, R.id.busnametpe, R.id.bustype, R.id.bt_viewseat});
lv.setAdapter(adapter);
Toast.makeText(Searchbus.this, "" + journeydatefromjson + ".." + busname, Toast.LENGTH_SHORT).show();
}
catch(Exception e){
e.printStackTrace();
}
}
}`
my layout is `<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_searchbus"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.notebook.runtowin.Searchbus">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/mytoolbar"
android:layout_marginTop="3sp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:id="@+id/datelayout"
android:layout_alignParentTop="true"
android:layout_marginTop="18sp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/dateview"
android:hint="date"
android:textSize="26sp"
android:textColor="@color/colorPrimaryDark"/>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@+id/datelayout"
android:layout_marginTop="20sp"
android:id="@+id/relativeLayout1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Operator & Departure"
android:textSize="16sp"
android:id="@+id/departtextview"
android:padding="5sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Price"
android:textSize="16sp"
android:padding="5sp"
android:layout_marginLeft="15sp"
android:layout_marginStart="49dp"
android:id="@+id/textView2"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/departtextview" />
</RelativeLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/relativeLayout1"
android:layout_marginTop="10sp">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/listviewbusdetails"
android:divider="@color/colorPrimaryDark"
android:dividerHeight="1sp"/>
</LinearLayout>
</RelativeLayout>
</ScrollView>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="35sp"
android:minHeight="?attr/actionBarSize"
android:id="@+id/mytoolbar"
android:background="@color/colorPrimaryDark"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/from_to"
android:textColor="@color/colorwhite"/>
</android.support.v7.widget.Toolbar>
</RelativeLayout>
` my listview code is `<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/busname"
android:padding="4sp"
android:layout_alignParentStart="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone"
android:id="@+id/no_bus"
android:text="no bus is available"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="nddnsadasndman"
android:id="@+id/bustiming"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="bustype"
android:padding="4sp"
android:id="@+id/busnametpe"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="busslepper"
android:id="@+id/bustype"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/price"
android:layout_centerHorizontal="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="450"
android:id="@+id/fare_amt"
android:gravity="center"
android:layout_margin="15sp"
android:textSize="23sp"
android:layout_gravity="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="duration"
android:id="@+id/journey_hours"
android:gravity="center"
android:layout_gravity="center"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/seats"
android:layout_alignParentEnd="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="View seats"
android:layout_margin="8sp"
android:id="@+id/bt_viewseat"
android:background="@color/colorPrimaryDark"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="seats"
android:id="@+id/seats_avail"
android:gravity="center"/>
</LinearLayout>
</RelativeLayout>`
my logcat error is `12-29 14:53:35.435 13421-13421/com.example.notebook.runtowin W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
12-29 14:53:35.647 13421-13421/com.example.notebook.runtowin I/TextInputLayout: EditText added is not a TextInputEditText. Please switch to using that class instead.
12-29 14:53:35.651 13421-13421/com.example.notebook.runtowin I/TextInputLayout: EditText added is not a TextInputEditText. Please switch to using that class instead.
12-29 14:53:35.666 13421-13421/com.example.notebook.runtowin I/DpmTcmClient: RegisterTcmMonitor from: org.apache.http.impl.conn.TcmIdleTimerMonitor
12-29 14:53:35.692 13421-13459/com.example.notebook.runtowin D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
12-29 14:53:35.708 13421-13460/com.example.notebook.runtowin W/System: ClassLoader referenced unknown path: /system/framework/com.qualcomm.qti.GBAHttpAuthentication.jar
12-29 14:53:35.742 13421-13421/com.example.notebook.runtowin D/ActivityThreadInjector: clearCachedDrawables.
12-29 14:53:35.774 13421-13459/com.example.notebook.runtowin I/Adreno: QUALCOMM build : a7823f5, I59a6815413
Build Date : 09/23/16
OpenGL ES Shader Compiler Version: XE031.07.00.00
Local Branch : mybranch22028469
Remote Branch : quic/LA.BR.1.3.3_rb2.26
Remote Branch : NONE
Reconstruct Branch : NOTHING
12-29 14:53:35.784 13421-13459/com.example.notebook.runtowin I/OpenGLRenderer: Initialized EGL, version 1.4
12-29 14:53:35.848 13421-13459/com.example.notebook.runtowin E/HAL: hw_get_module_by_class: module name gralloc
12-29 14:53:35.848 13421-13459/com.example.notebook.runtowin E/HAL: hw_get_module_by_class: module name gralloc
12-29 14:53:37.589 13421-13460/com.example.notebook.runtowin I/city: [{"cityId":"5","cityName":"Coimbatore"},{"cityId":"6","cityName":"Chennai"},{"cityId":"7","cityName":"Madurai"},{"cityId":"8","cityName":"Kanyakumari"},{"cityId":"9","cityName":"Nagercoil"},{"cityId":"12","cityName":"Anjugramam"},{"cityId":"11","cityName":"Erode"},{"cityId":"13","cityName":"Valliyur"},{"cityId":"14","cityName":"Kavalkinaru"},{"cityId":"15","cityName":"Tirunelveli"}]
12-29 14:53:37.606 13421-13421/com.example.notebook.runtowin I/InstituteName: [Coimbatore, 5, Chennai, 6, Madurai, 7, Kanyakumari, 8, Nagercoil, 9, Anjugramam, 12, Erode, 11, Valliyur, 13, Kavalkinaru, 14, Tirunelveli, 15]
`
1 answers
solution1
0 2016-12-29 13:03:49
1) Make sure you parse the json correctly. System.out.pritnln("text") and Log.d("some", "thing") are your friends.
2) In Android Studio there is an easy way to view the log, look for: 6: Android Monitor.
3) Check this excellent post about ListView and it's Adapters. Mock your data &| classes to make sure you get the input you want.
4) Building Android Apps in a hurry is a bad idea. Java / Android is not strong with fast building, Cordova / Javascript / HTML are better for that. But Java & Android have the power and speed when done right...
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