Develop Reference

How to save items inside an ArrayList when an app is restarted? (Android)

Whenever I restart my app, all the information I saved inside an ArrayList during its runtime is deleted. In addition, sometimes when I go to another activity and then come back from that second activity. The information is deleted again. I'm not sure what's causing this. I want the information to be permanently saved unless deleted by the user. Usually, the error I'm receiving are IndexOutOfBounds exception when I need to call an item from my ArrayList.
Main Activity Code:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private TextView preset;
private Button add;
private ListView exercises;
private ArrayList<String> exerciseName;
public ArrayList<Exercise> Exercises;
private MyAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Exercises = new ArrayList<Exercise>();
preset = findViewById(R.id.preset_title);
add = findViewById(R.id.add_exercise);
exercises = findViewById(R.id.exercises);
exerciseName = FileHelper.readData(this);
this.adapter = new MyAdapter(exerciseName, this, Exercises);
exercises.setAdapter(adapter);
add.setOnClickListener(this);
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.add_exercise:
final int CODE = 1;
Intent i = new Intent(this, add_activity.class);
startActivityForResult(i, CODE);
break;
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode) {
case 1:
if(resultCode == RESULT_OK && data != null) {
Bundle passBack = data.getExtras();
Exercise exercise = passBack.getParcelable("exercise");
adapter.addData(exercise);
adapter.list.add(exercise.getName());
FileHelper.writeData(exerciseName, this);
adapter.notifyDataSetChanged();
}
case 2:
if (resultCode == RESULT_OK && data != null) {
Bundle passBack = data.getExtras();
Exercise exercise = passBack.getParcelable("exercise");
int position = passBack.getInt("position");
adapter.setData(exercise, position);
adapter.notifyDataSetChanged();
}
}
}
}
Custom Adapter Code (where my ArrayList data is stored):
public class MyAdapter extends ArrayAdapter<String> {
public ArrayList<String> list;
private Context context;
private TextView list_txt;
private ArrayList<Exercise> data;
public MyAdapter(ArrayList<String> records, Context context, ArrayList<Exercise> data) {
super(context, 0, records);
this.list = records;
this.data = data;
this.context = context;
}
public void addData(Exercise d){
data.add(d);
}
public void setData(Exercise d, int position) {
data.set(position, d);
}
#Override
public View getView(final int position, View convertView, final ViewGroup parent) {
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.listview_custom, parent, false);
}
Button list_but = (Button) convertView.findViewById(R.id.list_but);
TextView list_txt = (TextView) convertView.findViewById((R.id.list_txt));
Button edit = (Button) convertView.findViewById(R.id.list_but2);
Button start = (Button) convertView.findViewById(R.id.list_but3);
list_txt.setText(list.get(position));
edit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
final int CODE2 = 2;
Activity origin = (Activity)context;
Intent edit = new Intent(parent.getContext(), add_activity.class);
Bundle newBundle = new Bundle();
newBundle.putParcelable("exercise", data.get(position));
newBundle.putInt("position", position);
edit.putExtras(newBundle);
origin.startActivityForResult(edit, CODE2);
}
});
start.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent start = new Intent(parent.getContext(), timer_activity.class);
start.putExtra("exercise", data.get(position));
parent.getContext().startActivity(start);
}
});
list_but.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder(context);
alert.setTitle("Delete?");
alert.setMessage("Are you sure you want to delete this exercise?");
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
list.remove(position);
try {
data.remove(position);
} catch(IndexOutOfBoundsException ex) {
}
notifyDataSetChanged();
}
});
alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
alert.create().show();
}
});
return convertView;
}
}

Every time You destroy activity You are losing all saved data in ListView. You have to save it before destroying and restore when You start an activity. You can do it with gson and SharedPreferences.
In Your MainActivity override onSaveInstanceState and inside this method save all Your exercises from Exercises list using gson.
Gson gson = new Gson();
String exercisesJSON = gson.toJson(Exercises);
SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString("KEY_BETTER_USE_CONST", exercisesJSON);
editor.commit();
And then in onCreate restore this data:
SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
String exercisesJSON = sharedPref.getInt("KEY_BETTER_USE_CONST", "DEFAULT_VALUE_EMPTY");
//check if exercisesJSON is equal to "DEFAULT_VALUE_EMPTY" if yes, init array as empty, if not deserialize it using gson
Gson gson = new Gson();
Exercises[] exercises = gson.fromJson(exercisesJSON, Exercise[].class);
Haven't debugged this code but I think it should look something like this. I based on: Gson — Mapping of Arrays and Lists of Objects

Android - Adding objects to a list view from another activity

I've got a custom list view with my own adapter. I can add objects to this list within the same activity, but what I want to do is add objects from another activity. In this other activity there are two Edit Text boxes. One is responsible for Main text, second for Description, and two radio buttons that are determining image. At the bottom is Add button, that should add entered data to the list view.
I tried to do this with Parcelable, but I don't know exactly how to implement it. Below is my ListView class:
public class Activity_4 extends AppCompatActivity {
private ListView listView;
private myAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_4);
listView = (ListView)findViewById(R.id.listView4);
ArrayList<Object> objectList = new ArrayList<>();
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
objectList.add(new Object(R.drawable.row_img, "After Earth" , "2013"));
mAdapter = new myAdapter(this,objectList);
listView.setAdapter(mAdapter);
}
public class Object implements Parcelable {
int imageID;
String mainText;
String description;
public Object (int imageID, String mainText, String description) {
this.imageID = imageID;
this.mainText = mainText;
this.description = description;
}
public Object() {
}
public int getImageID() {
return imageID;
}
public void setImageID(int imageID) {
this.imageID = imageID;
}
public String getMainText () {
return mainText;
}
public void setMainText() {
this.mainText = mainText;
}
public String getDescription() {
return description;
}
public void setDescription() {
this.description = description;
}
public Object(Parcel in) {
this.imageID = in.readInt();
this.mainText = in.readString();
this.description = in.readString();
}
public final Parcelable.Creator<Object> CREATOR = new Parcelable.Creator<Object>() {
#Override
public Object createFromParcel(Parcel in) {
return new Object(in);
}
#Override
public Object[] newArray(int size) {
return new Object[size];
}
};
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(imageID);
dest.writeString(mainText);
dest.writeString(description);
}
}
public class myAdapter extends ArrayAdapter<Object> {
private Context mContext;
private List<Object> objectList = new ArrayList<>();
public myAdapter(#NonNull Context context, ArrayList<Object> list) {
super(context,0,list);
mContext = context;
objectList = list;
}
#NonNull
#Override
public View getView (int position, #Nullable View convertView, #NonNull ViewGroup parent) {
View listItem = convertView;
if (listItem == null)
listItem = LayoutInflater.from(mContext).inflate(R.layout.list_row, parent, false);
Object currentObject = objectList.get(position);
ImageView image = (ImageView) listItem.findViewById(R.id.row_image);
image.setImageResource(currentObject.getImageID());
TextView mainTxt = (TextView) listItem.findViewById(R.id.row_tv1);
mainTxt.setText(currentObject.getMainText());
TextView description = (TextView) listItem.findViewById(R.id.row_tv2);
description.setText(currentObject.getDescription());
return listItem;
}
}
Can anyone help with this problem?
Thanks

You can other Activity using startActivityForResult() and pass data in bundle as result on click of add button from other Activity, so current activity will add the data to it's list.
Calling Other Activity to add
startActivityForResult(intent,reqCode);
On Result
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (data != null && requestCode == reqCode) {
Object object = new Object();
object.setImageID(data.getIntExtra("image_id"));
object.setMainText(data.getStringExtra("main_text");
object.setDescription(data.getStringExtra("desc");
objectlist.add(object);
mAdapter.notifyDataSetChanged();
}
}
Other Activity
public void onAddClick(){
Intent intent = new Intent();
intent.putIntExtra("image_id",*<value>*);
intent.putStringExtra("main_text",*<value>*);
intent.putStringExtra("desc",*<value>*);
setResult(intent);
finish();
}

A good starting point might be to start your EditText activity using startActivityForResult and pass the updates to the list to your adapter through the result, after you added everything you wanted by calling setResult with your new data. For further reference see Getting a Result from an Activity. Good luck!

When opening 2nd Activity from 1st Activity
do
Intent mIntent=new Intent(this,YourSecondActivity.class);
startActivityForResult(mIntent,SOME_STATIC_INT)
In another activity
on click of AddButton
Intent mIntent=new Intent(this,YourFirstActivity.class);
mIntent.putExtra("DATA",Object)
setResult(SOME_STATIC_INT,mIntent)
now in 1st Activity
Override onActivity Result
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (data != null && requestCode == SOME_STATIC_INT) {
Object object = data.getParcelableExtra("DATA")
objectlist.add(object);
mAdapter.notifyDataSetChanged();
}
}

ListView Adapter setResult() and Finish() error

I want to startActivity for Result by using startActivityForResult() method.Now the activity which get started has a listview with adapter class for it.I had wriiten following Listview Adapter so when user selects any item it should return back to calling activity with selected item name.I cant able to call 2 methods
setResult() and finish() in following code
Adapter Code:
view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
SharedPreferences prefernces = mContext.getSharedPreferences("MyKey111", Context.MODE_PRIVATE);
SharedPreferences.Editor editor1 = prefernces.edit();
editor1.putString("Custname",customerpopulationlist.get(position).getName());
editor1.putString("let_id", customerpopulationlist.get(position).getLetId());
editor1.commit();
Intent intentMessage = new Intent();
// put the message in Intent
intentMessage.putExtra("MESSAGE", "hello");
intentMessage.putExtra("selected_refer", customerpopulationlist.get(position).getLetId());
setResult(RESULT_OK, intentMessage);
finish();
}
});

you must hold an reference to your activity that created the adapter then set result to that. the thing you are doing is setting the result of OnClickListener object !!
add an Activity object to your adapter constructor and save it in a local variable in adapter and call it act then call the setResult() of the activtiy like below:
view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
SharedPreferences prefernces = mContext.getSharedPreferences("MyKey111", Context.MODE_PRIVATE);
SharedPreferences.Editor editor1 = prefernces.edit();
editor1.putString("Custname",customerpopulationlist.get(position).getName());
editor1.putString("let_id", customerpopulationlist.get(position).getLetId());
editor1.commit();
Intent intentMessage = new Intent();
// put the message in Intent
intentMessage.putExtra("MESSAGE", "hello");
intentMessage.putExtra("selected_refer", customerpopulationlist.get(position).getLetId());
//THESE TWO LINES NEED TO BE CHANGED
act.setResult(RESULT_OK, intentMessage);
act.finish();
}
});

You need override method protected void onActivityResult(int requestCode, int resultCode, intent data on the activity you need to return to i.e. the activity where you have called startActivityforResult().
#override
protected void onActivityResult(int requestCode, int resultCode, intent data){
if(resultCode == -1) // -1 for RESULT_OK
{ // your logic goes here...
}
}

There is difference between an Activity object and A Context object(if there is confusion, better read the documentation for better understanding) So, the answer is simple,
When you want to do an activity based operation, follow like this
Activity activity = this;
Context context = ActivityName.this;
Pass both the objects in the adapter and then use
activity.setResult(Activity.RESULT_OK,intent);
activity.finish();
and for context-based operations use Intent i = new Intent( ListViewAdapter.this.mContext,EventPrivacyAndTicketPrice.class);
see full activity code below:
public class ActivityX extends AppCompatActivity {
Intent intent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_x);
intent = getIntent();
ListView listView = findViewById(R.id.list_x);
ArrayList<ETypeObject> allTypes= new ArrayList<>();
allTypes = GetData();
ListViewAdapter listViewAdapter= new ListViewAdapter(allTypes,ActivityX.this,intent,this);
listView.setAdapter(listViewAdapter);
}
public ArrayList<ETypeObject> GetData(){
ArrayList<ETypeObject> allTypes= new ArrayList<>();
allTypes.add(new ETypeObject("Object1",0));
allTypes.add(new ETypeObject("Object2, Talk",0));
allTypes.add(new ETypeObject("Object3",0));
return allTypes;
}
}
class ETypeObject {
public String name;
public int imageId;
public ETypeObject(String name, int imageId) {
this.name = name;
this.imageId = imageId;
}
public ETypeObject() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getImageId() {
return imageId;
}
public void setImageId(int imageId) {
this.imageId = imageId;
}
}
class ListViewAdapter extends BaseAdapter{
Activity activity;
Context mContext;
ArrayList<ETypeObject> allTypes= new ArrayList<>();
Intent intent;
public ListViewAdapter(){}
public ListViewAdapter(ArrayList<ETypeObject> AllTypes, Context context,Intent intent,Activity activity){
mContext = context;
allTypes = AllTypes;
activity =activity;
this.intent = intent;
}
#Override
public int getCount() {
return allTypes.size();
}
#Override
public Object getItem(int i) {
return allTypes.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int i1, View view, ViewGroup viewGroup) {
LayoutInflater layoutInflater= (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (layoutInflater!=null){
view = layoutInflater.inflate(R.layout.lay1,null);
}
TextView type;
type = view.findViewById(R.id.parentInteresttext);
type.setText(allTypes.get(i1).getName());
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Toast.makeText(mContext,allTypes.get(i1).getName(),Toast.LENGTH_LONG).show();
if (intent.getBooleanExtra("fromThirdActivty",false)){
Intent i = new Intent();
i.putExtra("eventType",allTypes.get(i1).getName());
activity.setResult(Activity.RESULT_OK,intent);
activity.finish();
}
Intent i = new Intent( ListViewAdapter.this.mContext,OtherActivity.class);
i.putExtra("eventType",allTypes.get(i1).getName());
ListViewAdapter.this.mContext.startActivity(i);
}
});
return view;
}
}

QR code reader thrown from an image of an item of a ListView

I want that when the image of the item is pressed launches QR code reader provided by the library zxing.
I tested two options.
The first option has been my custom adapter trying to launch the intent.
The second option has been following the first and a topic of this forum, and I got kind of my custom adapter in the main class and I created two methods.
This last option gives me syntax error, but if you run:
android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.google.zxing.client.android.SCAN (has extras) } at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1659)
Actually, this is my code:
public class Inventario extends Activity implements OnItemClickListener {
private ArrayList<Obra> obras;
private ListView lvObras;
private ObrasAdapter adapter;
private TextView num, iden,ubi,hombres,material;
private int pulsado = -1;
Toast toast1 ;
private int operacion = -1;
List<String> equiDisp;
ArrayList<String> marcado;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.inventario);
equiDisp = new ArrayList<String>();
marcado = new ArrayList<String>();
for(int i=1; i<11; i++)
{
equiDisp.add(String.valueOf(i));
}
// Inicializamos las variables.
obras = new ArrayList<Obra>();
rellenarArrayList();
actualizarDisplay();
}
...
public void abrirLector(){
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}
public void actualizarDisplay()
{
adapter = new ObrasAdapter(this, obras);
lvObras = (ListView) findViewById(R.id.lvItems);
lvObras.setAdapter(adapter);
lvObras.setOnItemClickListener(this);
}
public class ObrasAdapter extends ArrayAdapter<Obra> {
public Context context;
private ArrayList<Obra> datos;
public void DisplayProjectListAdapter(Context c) {
context = c;
}
public ObrasAdapter(Context context, ArrayList<Obra> datos) {
super(context, R.layout.listview_item, datos);
this.context = context;
this.datos = datos;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View item = convertView;
ObrasHolder holder;
if (item == null) {
item = LayoutInflater.from(context).inflate(R.layout.listview_item,
null);
holder = new ObrasHolder();
holder.qr = (ImageView) item.findViewById(R.id.qr);
item.setTag(holder);
}
holder = (ObrasHolder) item.getTag();
holder.qr.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
holder.qr.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
abrirLector();
}
});
}
});
return item;
}
Can anyone help me out? Thank you

The problem you are getting related to ActivityNotFoundException can be fixed by the steps you can find in this link. This is the official documentation for zxing that tells you how to open the scanner in the yet provided dialog they have. Replace it by your code:
public void abrirLector(){
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}

Add holder.qr.setOnClickListener(new OnImageClickListener()); to the get view method.
Then add an inner class to this class:
private class OnImageClickListener implements OnClickListener {
#Override
public void onClick(View v) {
Main sct = (Main) activity;
sct.onClick();
return void;
}
Then go ahead and add a method called onClick() to your Main activity and add the code to call the intent in that method

Unable to retrieve Array from Aync task in Activity Using Universal Image Loader for Android and Flickr

I am trying to fetch a list of photos from a photo set in flickr
using universal image loader
My Base Activity ImagePagerActivity calls FetchPhotos which extends Async Task.
Code Follows
public class ImagePagerActivity extends BaseActivity {
private static final String STATE_POSITION = "STATE_POSITION";
public static final String API_KEY="mykey";
public static final String USER_ID="myid";
DisplayImageOptions options;
private Photos thePhotoList;
ViewPager pager;
private String thePhotos="";
private final int[] timeout={3,10};
private String url="http://www.flickr.com/services/rest/?method=flickr.photosets.getPhotos&format=json&api_key="+API_KEY+"&photoset_id=111111111";
private String[] imageUrls;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ac_image_pager);
Bundle bundle = getIntent().getExtras();
String url="http://www.flickr.com/services/rest/?method=flickr.photosets.getPhotos&format=json&api_key="+API_KEY+"&photoset_id=72157633359614452";
setContentView(R.layout.pics);
try{
((ViewAnimator)findViewById(R.id.PictureAnimator)).removeAllViews();
}catch (Exception e) {}
thePhotoList = new Photos(url);
thePhotoList.execute();
imageUrls=thePhotoList.imageList;
//imageUrls = bundle.getStringArray(Extra.IMAGES);
int pagerPosition = bundle.getInt(Extra.IMAGE_POSITION, 0);
if (savedInstanceState != null) {
pagerPosition = savedInstanceState.getInt(STATE_POSITION);
}
options = new DisplayImageOptions.Builder()
.showImageForEmptyUri(R.drawable.ic_empty)
.showImageOnFail(R.drawable.ic_error)
.resetViewBeforeLoading()
.cacheOnDisc()
.imageScaleType(ImageScaleType.EXACTLY)
.bitmapConfig(Bitmap.Config.RGB_565)
.displayer(new FadeInBitmapDisplayer(300))
.build();
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(new ImagePagerAdapter(this.imageUrls));
pager.setCurrentItem(pagerPosition);
}
private class Photos extends com.flickr.FetchPhotos{
#Override
public void onFetchError() {}
public Photos(String url) {super(ImagePagerActivity.this, url);}
}
#Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(STATE_POSITION, pager.getCurrentItem());
}
private class ImagePagerAdapter extends PagerAdapter {
private String[] images;
private LayoutInflater inflater;
ImagePagerAdapter(String[] images) {
this.images = images;
inflater = getLayoutInflater();
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((View) object);
}
#Override
public void finishUpdate(View container) {
}
#Override
public int getCount() {
return images.length;
}
#Override
public Object instantiateItem(ViewGroup view, int position) {
View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener() {
#Override
public void onLoadingStarted(String imageUri, View view) {
spinner.setVisibility(View.VISIBLE);
}
#Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
String message = null;
switch (failReason.getType()) {
case IO_ERROR:
message = "Input/Output error";
break;
case DECODING_ERROR:
message = "Image can't be decoded";
break;
case NETWORK_DENIED:
message = "Downloads are denied";
break;
case OUT_OF_MEMORY:
message = "Out Of Memory error";
break;
case UNKNOWN:
message = "Unknown error";
break;
}
Toast.makeText(ImagePagerActivity.this, message, Toast.LENGTH_SHORT).show();
spinner.setVisibility(View.GONE);
}
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
spinner.setVisibility(View.GONE);
}
});
((ViewPager) view).addView(imageLayout, 0);
return imageLayout;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
#Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
#Override
public Parcelable saveState() {
return null;
}
#Override
public void startUpdate(View container) {
}
}
}
next is the FetchPhotos class
public abstract class FetchPhotos extends AsyncTask<Void, Void, Boolean>{
private Context context;
private ProgressDialog pd;
private String thePhotos="";
private String url;
private final int[] timeout={3,10};
public ArrayList<PictureInfo> thePics;
public String[] imageList;
public FetchPhotos(Context context,String url) {
this.context=context;
this.url=url;
}
public String[] fillGalery(JSONObject theFeed) {
// TODO Auto-generated method stub
String[] imageUrls = null;
try{
JSONArray Categories=theFeed.getJSONArray("photo");
imageUrls=new String[Categories.length()];
for (int i=0;i<(Categories.length()>15?15:Categories.length());i++){
JSONObject pic = Categories.getJSONObject(i);
String url1="http://farm"+pic.getString("farm")+".staticflickr.com/"+pic.getString("server")+"/"+
pic.getString("id")+"_"+pic.getString("secret")+".jpg";
imageUrls[i]=url1;
System.out.println(imageUrls[i]);
}
return imageUrls;
}
catch(Exception e){
}
return imageUrls;
}
#Override
protected void onPreExecute() {
pd=ProgressDialog.show(context, "downloading", "please wait");
super.onPreExecute();
}
#Override
protected Boolean doInBackground(Void... arg0) {
try{
thePhotos = new Internet().GetRequest(url, null, timeout);
return true;
}catch (Exception e) {
return false;
}
}
#Override
protected void onPostExecute(Boolean result) {
pd.dismiss();
if(result){
try {
thePhotos=thePhotos.split("\\(")[1];
thePhotos.replace("\\)", "");
imageList=fillGalery(new JSONObject(thePhotos).getJSONObject("photoset"));
} catch (Exception e) {Log.e("karp", "photolist2: "+e.getMessage());onFetchError();onFetchError();}
}else{
onFetchError();
}
super.onPostExecute(result);
}
public abstract void onFetchError();
public void LoadPhoto(PictureInfo pi){
Log.d("karp", "LoadPhoto");
if(!(pi.executed)){
new LoadPics(pi).execute();
pi.executed=true;
}
}
private class LoadPics extends RemoteImage{
private ImageView ivTarget;
private ProgressBar pb;
public LoadPics(PictureInfo pi) {
super(pi.url);
this.ivTarget=pi.iv;
this.pb=pi.pb;
}
#Override
public void onSuccess(Bitmap remoteBitmap) {
try{
pb.setVisibility(View.INVISIBLE);
ivTarget.setImageBitmap(remoteBitmap);
}catch (Exception e) {}
}
#Override
public void onFail() {pb.setVisibility(View.INVISIBLE);}
}
}
I have created Photos class in Image Pager
and then Im trying to access fill gallery
Now Im trying to fill a string array with the image urls from flickr
using the method fillGallery that reurns a string array
In my base activity im calling
thePhotoList = new Photos(url);
thePhotoList.execute();
imageUrls=thePhotoList.imageList;
but try as i may i cant get an array in imageUrls which is a String Array.
When i use a hard coded string array with urls for images in it, the code works.
Any help would be really appreciated.
Im sure im doing something very silly as I am new to this.
Many thanks . Cheers!

I got it to work . Needed to add a listener interface , call the method from onPostExecute,
Implement it in the activity, access the variable in the implementation of the listeners abstract method. Should have researched a bit more before posting,but was stuck with the problem too long . Apologies.