In my main activity (LocalFeed) I have a listview that is connected to an AsyncTask which gets data from the database in Json format and then it sends it to the BaseAdapter. My problem is that notifyDataSetChanged() does nothing for me (upon further researching I got the logcat output from it included below), I have read a lot of posts on here like this one Android notifyDataSetChanged not working and have implemented their idea's but nothing works. I get the data originally when I set the adapter but when I have new data coming in it stays the same unless I call setAdapter again which is bad practice. First this is my activity..
public class LocalFeed extends Activity
{
String localstreams;
EditText POST;
SharedPreferences myaccount,mya;
String PathUrl;
float tlatmin,tlatmax,tlonmin,tlonmax,latitudes,longitudes;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.local_feed);
// Inputs that are used for the database
PathUrl = getResources().getString(R.string.PathUrl);
// URL for data api
localstreams = PathUrl + "/api/streams";
tlatmin = myaccount.getFloat("thirtylatmin", 0.0f);
tlatmax = myaccount.getFloat("thirtylatmax", 0.0f);
tlonmin = myaccount.getFloat("thirtylonmin", 0.0f);
tlonmax = myaccount.getFloat("thirtylonmax", 0.0f);
latitudes = myaccount.getFloat("latitudes", 0.0f);
longitudes = myaccount.getFloat("longitudes", 0.0f);
// This is the AsyncTask that will get the Json Data from the database
final ListView lv = (ListView) findViewById(R.id.localfeed);
new Streams_Async(localstreams, tlatmin, tlatmax, tlonmin, tlonmax, LocalFeed.this, myaccount, 1,lv).execute();
// I would like to setAdapter here but Json data only comes after onPostexecute of AsyncTask
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater mif=getMenuInflater();
mif.inflate(R.menu.menu_local_feed, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.Logout) {
SharedPreferences settings = getSharedPreferences("userInfo", MODE_PRIVATE);
settings.edit().clear().commit();
startActivity(new Intent(LocalFeed.this,Login.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}
I pass my Listview To the AsyncTask() since the data comes from there I can not call adapter until the onPostExecute() method. This is my AsyncTask()
public class Streams_Async extends AsyncTask<String,String,String> {
HttpURLConnection conn;
URL url;
String result="";
DataOutputStream wr;
String Stream_URL;
Activity m;
Integer page;
float tlatmin,tlatmax,tlonmin,tlonmax;
SharedPreferences myaccount;
public Streams_Async(String Stream_URL,float tlatmin,float tlatmax,float tlonmin,float tlonmax,Activity m,SharedPreferences myaccount,Integer page)
{
this.Stream_URL=Stream_URL;
this.tlatmin=tlatmin;
this.tlatmax=tlatmax;
this.tlonmin=tlonmin;
this.tlonmax=tlonmax;
this.m=m;
this.myaccount=myaccount;
this.page=page;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... params) {
// All This does it just get the data from the database
BufferedReader reader=null;
try{
url = new URL(Stream_URL);
conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.connect();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
String cert="thirtylatmin="+myaccount.getFloat("thirtylatmin", 0)+"&thirtylatmax="+myaccount.getFloat("thirtylatmax", 0)+"&thirtylonmin="+myaccount.getFloat("thirtylonmin", 0)+"&thirtylonmax="+myaccount.getFloat("thirtylonmax", 0)+
"&page="+page+"&pid="+myaccount.getInt("id", 0);
wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(cert);
wr.flush();
wr.close();
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuilder sBuilder = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
sBuilder.append(line + "\n");
}
result = sBuilder.toString();
reader.close();
conn.disconnect();
return result;
}
catch (Exception e)
{
e.printStackTrace();
}
return result;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
// All the data needed for listview is in result variable
try {
JSONObject jsonn = new JSONObject(result);
JSONArray jArray = jsonn.getJSONArray("localstreams");
JSONObject jobject = null;
JSONArray sss = new JSONArray();
for (int i = 0; i < jArray.length(); i++) {
jobject = jArray.getJSONObject(i);
jobject.getString("post");
jobject.getString("fullname");
jobject.getInt("id");
jobject.getInt("myid");
jobject.getInt("reputation");
jobject.getString("city");
jobject.getString("last_reply");
jobject.getString("state");
sss.put(jobject);
}
jsonn.put("localstreams", sss);
System.err.println("nnn: " + result);
if (lv.getAdapter() == null)
{
ListView mm= (ListView) m.findViewById(R.id.localfeed);
LocalFeed_CustomView DMF = new LocalFeed_CustomView(jsonn, m);
mm.setAdapter(DMF);
}
else
{
// This right here does not work
LocalFeed_CustomView DMF = new LocalFeed_CustomView(jsonn, m);
DMF.notifyDataSetChanged();
}
}
catch (Exception e) {
System.err.println("pp"+e.getMessage());
}
}
}
As you can see my problem is in the else statement inside onPostExecute it does not work; the **DMF.notifyDataSetChanged();**results in a parsing error which I can not find how to overcome.
public class LocalFeed_CustomView extends BaseAdapter {
JSONObject names;
Context ctx;
//,ra;
String result="";
private LayoutInflater mLayoutInflater = null;
public LocalFeed_CustomView(){}
public LocalFeed_CustomView(JSONObject arr,Context c) {
ctx = c;
names = arr;
mLayoutInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
notifyDataSetChanged();
}
public void updateList(){
notifyDataSetChanged();
}
@Override
public int getCount() {
try {
JSONArray jaLocalstreams = names.getJSONArray("localstreams");
return jaLocalstreams.length();
} catch (Exception e) {
Toast.makeText(ctx,"Error: Please try again",Toast.LENGTH_LONG).show();
return names.length();
}
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position,View convertView, ViewGroup parent) {
View row=convertView;
MyViewHolder holder=null;
try {
if(row==null) {
LayoutInflater li= (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = li.inflate(R.layout.customadapter, parent, false);
holder=new MyViewHolder(row);
row.setTag(holder);
}
else
{
holder=(MyViewHolder)row.getTag();
}
updateList();
// This populates Listview
JSONArray jaLocalstreams = names.getJSONArray("localstreams");
System.err.println("ssd:" + names);
final JSONObject jsonObject = jaLocalstreams.getJSONObject(position);
int a= jsonObject.getInt("myid");
holder.post.setText(jsonObject.getString("post"));
holder.fullname.setText(jsonObject.getString("fullname"));
holder.city.setText(jsonObject.getString("city")+ ", ");
holder.state.setText(jsonObject.getString("state"));
holder.comments.setText(jsonObject.getInt("comments")+ " Comments ");
holder.last_reply.setText(jsonObject.getString("last_reply"));
holder.reputation.setText(jsonObject.getString("reputation"));
jsonObject.getInt("profile_id");
jsonObject.getInt("id");
SharedPreferences myaccount = ctx.getSharedPreferences("userInfo", MODE_PRIVATE);
int my_id = myaccount.getInt("id", 0);
return row;
} catch (Exception e) {
e.printStackTrace();
}
return row;
}
class MyViewHolder{
TextView post,fullname,city,state,last_reply,comments,reputation;
ImageButton reputation_add;
MyViewHolder(View v)
{
post= (TextView)v.findViewById(R.id.post);
fullname= (TextView)v.findViewById(R.id.fullname);
city= (TextView)v.findViewById(R.id.city);
state= (TextView)v.findViewById(R.id.state);
last_reply= (TextView)v.findViewById(R.id.last_reply);
comments = (TextView)v.findViewById(R.id.id);
reputation= (TextView)v.findViewById(R.id.reputation);
reputation_add= (ImageButton)v.findViewById(R.id.reputation_add);
}
}
}
This below is the problem area
else
{
// This right here does not work
LocalFeed_CustomView DMF = new LocalFeed_CustomView(jsonn, m);
DMF.notifyDataSetChanged();
}
It goes to the catch statement and it's cause is null, this is the logcat for it.. What in my else code could be causing this error
java.lang.IllegalStateException: problem parsing idx 1
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:300)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1282)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:831)
at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:743)
at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:721)
at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$1.onReceive(NetworkStatsService.java:612)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:406)
at java.io.FileInputStream.<init>(FileInputStream.java:78)
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:269)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1282)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:831)
at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:743)
at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:721)
at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$1.onReceive(NetworkStatsService.java:612)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
at libcore.io.IoBridge.open(IoBridge.java:390)
at java.io.FileInputStream.<init>(FileInputStream.java:78)
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:269)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1282)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:831)
at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:743)
at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:721)
at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$1.onReceive(NetworkStatsService.java:612)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
09-30 03:47:45.001 36-67/? E/SurfaceTexture﹕ [com.exoler/com.exoler.Login] drainQueueLocked: SurfaceTexture has been abandoned!
09-30 03:47:45.261 158-188/com.android.inputmethod.latin E/ActivityThread﹕ Failed to find provider info for com.android.inputmethod.latin.dictionarypack
09-30 03:47:45.271 158-188/com.android.inputmethod.latin E/BinaryDictionaryGetter﹕ Could not find a dictionary pack
