I am googling for the last few hours, I've seen this question asked like 20 times but none of the solutions seem to work for me. I have a ListView and a CustomList class, that incorporates a list adapter and a simple dialog for editing/removing/renaming items. everything works as supposed until the first screen rotation. After that, the list stops being updated, although the adapter contains all the right data. I will post both files without skipping a line. I don't need any data being saved at this time, I will handle that later. This is really weird because supposedly the application gets completely restarted after screen rotation. What makes it even stranger, the dummy items are added onCreate even after screen rotation, but after that there is no other response from the list.
Please excuse my english and my noobness and try to point me in the right direction.
package com.sl.mylandmarks;
import android.app.Activity; import android.content.ContentResolver; import android.content.Context; import android.location.LocationManager; import android.os.Bundle; import android.provider.Settings; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView;
public class MainActivity extends Activity {
Button addButton; ListView landmarksList; EditText inputName, inputSearch; CustomList customList; Context globalContext; TextView gpsState; private LocationManager locationManager; private GPSTracker gpsTracker; private double longitude; private double latitude;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
gpsTracker = new GPSTracker(MainActivity.this);
globalContext = this;
addButton = (Button) findViewById(R.id.addBtn);
customList = new CustomList(this);
landmarksList = (ListView) findViewById(R.id.listView1); landmarksList.setAdapter(customList.getAdapter()); landmarksList.setChoiceMode(ListView.CHOICE_MODE_SINGLE); landmarksList.setTextFilterEnabled(true); landmarksList.setLongClickable(true); customList.theList = landmarksList;
inputName = (EditText) findViewById(R.id.EditItemName);
gpsState = (TextView) findViewById(R.id.gpsState);
ContentResolver contentResolver = getBaseContext().getContentResolver(); boolean gpsStatus = Settings.Secure.isLocationProviderEnabled(
contentResolver, LocationManager.GPS_PROVIDER); if (gpsStatus) { gpsState.setText("GPS Enabled"); } else { gpsState.setText("GPS Disabled"); }
// // SEARCH BOX
inputSearch = (EditText) findViewById(R.id.editText3); inputSearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) { }
public void onTextChanged(CharSequence s, int start, int before,
int count) {
customList.getAdapter().getFilter().filter(s); } }); // // SEARCH BOX
// / DUMMY ITEMS customList.addItem("Home", "43.1565 / 15.8645"); customList.addItem("Work", "43.1565 / 15.8645"); customList.addItem("Denis` apartment", "43.1565 / 15.8645"); customList.addItem("Natasa", "43.1565 / 15.8645"); customList.addItem("Bruce Wayne", "43.1565 / 15.8645"); customList.addItem("Walker shop", "43.1565 / 15.8645"); customList.addItem("Chuck Norris Residence", "43.1565 / 15.8645"); customList.addItem("Some landmark", "43.1565 / 15.8645"); // customList.removeItem(3);
OnItemLongClickListener listLongClick = new OnItemLongClickListener() {
@Override public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
customList.showOptionsDialog(arg2);
return true;// event consumed, not dispatched forward } };
landmarksList.setOnItemLongClickListener(listLongClick);
OnClickListener ButtonClick = new View.OnClickListener() {
@Override public void onClick(View v) {
switch (v.getId()) {
case R.id.addBtn:
customList.addItem(inputName.getText().toString(),
"45.5644 / 23.6541");
inputName.setText("");
break;
}
}
};
addButton.setOnClickListener(ButtonClick);
}
@Override public void onPause() { super.onPause();
}
@Override public void onResume() { super.onResume();
}
@Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true;
}
}
and CustomList.java
package com.sl.mylandmarks;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Dialog;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class CustomList {
ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>(
2);
HashMap<String, String> maplist;
SimpleAdapter listAdapter;
public Context context;
public ListView theList;
public CustomList(Context con) {
context = con;
String[] from = { "line1", "line2" };
int[] to = { android.R.id.text1, android.R.id.text2 };
listAdapter = new SimpleAdapter(context, list,
android.R.layout.simple_list_item_2, from, to);
}
public void addItem(String name, String coords) {
if ((name != null) && (name.length() != 0)) {
maplist = new HashMap<String, String>();
maplist.put("line1", name);
maplist.put("line2", coords);
list.add(maplist);
listAdapter.notifyDataSetChanged();
}
}
public void removeItem(int id) {
Log.d("removing",list.remove(id).toString());
listAdapter.notifyDataSetChanged();
}
public void renameItem(int id, String newName) {
Log.d("SL","Rename Selected");
maplist = new HashMap<String, String>();
maplist.put("line1", newName);
maplist.put("line2", list.get(id).get("line2"));
list.set(id, maplist);
listAdapter.notifyDataSetChanged();
}
public SimpleAdapter getAdapter() {
return listAdapter;
}
public void showOptionsDialog(final int position) {
//Log.d("SL", String.valueOf(position));
final Dialog optionsDialog = new Dialog(context);
optionsDialog.setContentView(R.layout.list_dialog);
optionsDialog.setTitle("Options");
optionsDialog.show();
final EditText itemNameEdit = (EditText) optionsDialog
.findViewById(R.id.EditItemName);
final Button removeBtn = (Button) optionsDialog
.findViewById(R.id.removeBtn);
final Button renameBtn = (Button) optionsDialog
.findViewById(R.id.renameBtn);
final Button cancelBtn = (Button) optionsDialog
.findViewById(R.id.cancelBtn);
itemNameEdit.setText(list.get(position).get("line1"));
itemNameEdit.setSelection(itemNameEdit.length());
OnClickListener ButtonClick = new View.OnClickListener() {
@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.removeBtn:
removeItem(position);
optionsDialog.dismiss();
break;
case R.id.renameBtn:
renameItem(position, itemNameEdit.getText().toString());
optionsDialog.dismiss();
break;
case R.id.cancelBtn:
optionsDialog.dismiss();
break;
}
}
};
removeBtn.setOnClickListener(ButtonClick);
renameBtn.setOnClickListener(ButtonClick);
cancelBtn.setOnClickListener(ButtonClick);
}
}
