App crashes at setImageResource()

App crashes at setImageResource() - java

I am getting a NullPointerException at
image.setImageResource(R.drawable.cover);
Here's my code:
NewsFeed.this.runOnUiThread(new Runnable(){
#Override
public void run() {
//Your code to run in GUI thread here
image.setImageResource(R.drawable.cover);
}
});
This code is running in a doInBackground() method. This is my ImageView in XML:
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true" />
NewsFeed.java
public class NewsFeed extends ListActivity {
MainActivity mainAct = new MainActivity();
private ProgressDialog pDialog;
// json url
// json tags
// JSON Node names
private static final String TAG_DATA = "data";
private static final String TAG_ID = "id";
private static String TAG_MESSAGE = "message";
private static final String TAG_CREATETIME = "created_time";
protected static final String JSONObject = null;
// contacts JSONArray
JSONArray contacts = null;
TimerTask timerTask;
Handler handler;
Timer ourtimer;
String url, gotToken, static_token, imgUrl, nextUrl = "none",
prevUrl = "none", paging;
ImageView image;
Bitmap myBitmap;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
// Bundle gotBasket = getIntent().getExtras();
// gotToken = gotBasket.getString("Access_Token");
static_token = "xxxxxxxxxxxxxxxx";
url = "https://graph.facebook.com/v2.2/awaaziitkgp/feed?access_token="
+ static_token;
setContentView(R.layout.news_feed);
image = (ImageView) findViewById(R.id.imageView1);
final TextView button1 = (TextView) findViewById(R.id.button1);
final TextView newPosts = (TextView) findViewById(R.id.nextPosts);
final TextView prevPosts = (TextView) findViewById(R.id.previousPosts);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Calling async task to get json
new GetContacts().execute();
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
contacts = jsonObj.getJSONArray(TAG_DATA);
JSONObject pagingObj = jsonObj.getJSONObject("paging");
// String nextObj = pagingObj.getString("next");
nextUrl = pagingObj.getString("next");
// JSONObject prevObj= pagingObj.getJSONObject("previous");
prevUrl = pagingObj.getString("previous");
Log.d("contact.length", String.valueOf(contacts.length()));
// looping through All Contacts
for (int i = 0; i < 25; i++) {
JSONObject c = contacts.getJSONObject(i);
// tmp hashmap for single contact
HashMap<String, String> data = new HashMap<String, String>();
String message = null;
String id = c.getString(TAG_ID);
data.put(TAG_ID, id);
if (c.has("description") == true) {
message = c.getString("description");
Log.d("Getting Description", message);
}
if (c.has("picture") == true) {
try {
Log.d("IT HAS PICTURE! TADA!!", "Image Found");
imgUrl = c.getString("picture");
Thread thread = new Thread(){
public void run(){
System.out.println("Thread Running");
NewsFeed.this.runOnUiThread(new Runnable(){
#Override
public void run() {
//Your code to run in GUI thread here
URL newUrl = null;
try {
newUrl = new URL(imgUrl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
myBitmap = getBitmapFromUrl(newUrl);
image.setImageBitmap(myBitmap);
}
});
}
};
thread.start();
} catch (Exception e) {
Log.d("ERROR LOADING IMAGE",
"Why you do this, InputStream? Why?");
}
}else{
NewsFeed.this.runOnUiThread(new Runnable(){
#Override
public void run() {
//Your code to run in GUI thread here
((ImageView) findViewById(R.id.imageView1)).setImageResource(R.drawable.cover);
}
});
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}

Here you can get a solution.
((ImageView)findViewById(R.id.image_view1)).setImageResource(R.drawable.cover);
XML Snippet:
<ImageView
android:id="#+id/image_view1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

You are trying to inflate a layout then use a view from another layout..
since you used R.layout.activity_main you can only use the views inside that layout nothing more..
but in your case you used the image1 = (ImageView) findViewById(R.id.dice1); which will reference a null value because it reside in your MAIN.xml not in activity_main.
So what you need to do is instead of using the activity_main layout use the appropriate layout which is setContentView(R.layout.MAIN);

Related

How to solve the error like java.lang.Throwable: setStateLocked?

I am developing an app. In it I'm using a listview. When I click on list item, it should go to next activity, i.e ProfileActivity2.java. It works fine, but in this ProfileActivty2 there is a button at the bottom and when I click on this button my app gets crashed and stopped in listview page. And shows the error java.lang.Throwable: setStateLocked in listview layout file i.e At setContentView. How do I solve this error?
//ProfileActivity2.java
public class ProfileActivity2 extends AppCompatActivity {
//Textview to show currently logged in user
private TextView textView;
private boolean loggedIn = false;
Button btn;
EditText edname,edaddress;
TextView tvsname, tvsprice;
NumberPicker numberPicker;
TextView textview1,textview2;
Integer temp;
String pname, paddress, email, sname, sprice;
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile1);
//Initializing textview
textView = (TextView) findViewById(R.id.textView);
edname=(EditText)findViewById(R.id.ed_pname);
edaddress=(EditText)findViewById(R.id.ed_add);
tvsname=(TextView)findViewById(R.id.textView_name);
tvsprice=(TextView)findViewById(R.id.textView2_price);
btn=(Button)findViewById(R.id.button);
Intent i = getIntent();
// getting attached intent data
String name = i.getStringExtra("sname");
// displaying selected product name
tvsname.setText(name);
String price = i.getStringExtra("sprice");
// displaying selected product name
tvsprice.setText(price);
numberPicker = (NumberPicker)findViewById(R.id.numberpicker);
numberPicker.setMinValue(0);
numberPicker.setMaxValue(4);
final int foo = Integer.parseInt(price);
textview1 = (TextView)findViewById(R.id.textView1_amount);
textview2 = (TextView)findViewById(R.id.textView_seats);
// numberPicker.setValue(foo);
numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
#Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
temp = newVal * foo;
// textview1.setText("Selected Amount : " + temp);
// textview2.setText("Selected Seats : " + newVal);
textview1.setText(String.valueOf(temp));
textview2.setText(String.valueOf(newVal));
// textview1.setText(temp);
// textview2.setText(newVal);
}
});
//Fetching email from shared preferences
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// submitForm();
// Intent intent = new Intent(ProfileActivity2.this, SpinnerActivity.class);
// startActivity(intent);
SharedPreferences sharedPreferences = getSharedPreferences(Config.SHARED_PREF_NAME, Context.MODE_PRIVATE);
loggedIn = sharedPreferences.getBoolean(Config.LOGGEDIN_SHARED_PREF, false);
String email = sharedPreferences.getString(Config.EMAIL_SHARED_PREF, "Not Available");
textView.setText(email);
if(loggedIn){
submitForm();
Intent intent = new Intent(ProfileActivity2.this, SpinnerActivity.class);
startActivity(intent);
}
}
});
}
private void submitForm() {
// Submit your form here. your form is valid
//Toast.makeText(this, "Submitting form...", Toast.LENGTH_LONG).show();
String pname = edname.getText().toString();
String paddress = edaddress.getText().toString();
String sname = textview1.getText().toString();
// String sname= String.valueOf(textview1.getText().toString());
String sprice= textview2.getText().toString();
// String sprice= String.valueOf(textview2.getText().toString());
String email= textView.getText().toString();
Toast.makeText(this, "Signing up...", Toast.LENGTH_SHORT).show();
new SignupActivity(this).execute(pname,paddress,sname,sprice,email);
}
}
//SignupActivity
public class SignupActivity extends AsyncTask<String, Void, String> {
private Context context;
Boolean error, success;
public SignupActivity(Context context) {
this.context = context;
}
protected void onPreExecute() {
}
#Override
protected String doInBackground(String... arg0) {
String pname = arg0[0];
String paddress = arg0[1];
String sname = arg0[2];
String sprice = arg0[3];
String email = arg0[4];
String link;
String data;
BufferedReader bufferedReader;
String result;
try {
data = "?pname=" + URLEncoder.encode(pname, "UTF-8");
data += "&paddress=" + URLEncoder.encode(paddress, "UTF-8");
data += "&sname=" + URLEncoder.encode(sname, "UTF-8");
data += "&sprice=" + URLEncoder.encode(sprice, "UTF-8");
data += "&email=" + URLEncoder.encode(email, "UTF-8");
link = "http://example.in/Spinner/update.php" + data;
URL url = new URL(link);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
result = bufferedReader.readLine();
return result;
} catch (Exception e) {
// return new String("Exception: " + e.getMessage());
// return null;
}
return null;
}
#Override
protected void onPostExecute(String result) {
String jsonStr = result;
Log.e("TAG", jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
String query_result = jsonObj.getString("query_result");
if (query_result.equals("SUCCESS")) {
Toast.makeText(context, "Success! Your are Now MangoAir User.", Toast.LENGTH_LONG).show();
} else if (query_result.equals("FAILURE")) {
Toast.makeText(context, "Looks Like you already have Account with US.", Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
// Toast.makeText(context, "Error parsing JSON Please data Fill all the records.", Toast.LENGTH_SHORT).show();
// Toast.makeText(context, "Please LogIn", Toast.LENGTH_SHORT).show();
Toast.makeText(context, "Please Login", Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(context, "Grrr! Check your Internet Connection.", Toast.LENGTH_SHORT).show();
}
}
}
//List_Search
public class List_Search extends AppCompatActivity {
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String SNAME = "sname";
static String SPRICE = "sprice";
Context ctx = this;
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.list_search);
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(List_Search.this);
// Set progressdialog title
mProgressDialog.setTitle("Android JSON Parse Tutorial");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonobject = JSONfunctions
.getJSONfromURL("http://example.in/MangoAir_User/mangoair_reg/ListView1.php");
try {
// Locate the array name in JSON
jsonarray = jsonobject.getJSONArray("result");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
map.put("sname", jsonobject.getString("sname"));
map.put("sprice", jsonobject.getString("sprice"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.listView_search);
// Pass the results into ListViewAdapter.java
// adapter = new ListViewAdapter(List_Search.this, arraylist);
adapter = new ListViewAdapter(ctx, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
}
//ListViewAdapter
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
private boolean loggedIn = false;
ArrayList<HashMap<String, String>> data;
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapter(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
}
#Override
public int getCount() {
return data.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView name,price;
Button btn;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.search_item, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
name = (TextView) itemView.findViewById(R.id.textView8_sellernm);
// Capture position and set results to the TextViews
name.setText(resultp.get(List_Search.SNAME));
price = (TextView) itemView.findViewById(R.id.textView19_bprice);
// Capture position and set results to the TextViews
price.setText(resultp.get(List_Search.SPRICE));
btn=(Button)itemView.findViewById(R.id.button3_book);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
resultp = data.get(position);
Intent intent = new Intent(context, ProfileActivity2.class);
// Pass all data rank
intent.putExtra("sname", resultp.get(List_Search.SNAME));
intent.putExtra("sprice", resultp.get(List_Search.SPRICE));
context.startActivity(intent);
}
});
return itemView;
}
}

context.startActivity(intent);
I think the error is at this line inside btn.setOnClickListener of getview block just use startActivity(intent);

how to display details of single item of list in another activity from url (json data)?

I have written a program to display the list of json data from a url which has an image and 5 textviews which is displaying perfectly.
Url : https://itunes.apple.com/search?term=jack+johnson&limit=50.
When i click on an item from the list i want to display the details of that item in another activity based on the track-id
Url : https://itunes.apple.com/lookup?id=659234741
So when i click on the item the details are getting displayed in the textview , but by default it is displaying the details of id = 659234741 for some items or in short the details does not match.
Need some help to figure out the problem
My Code :
MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
resultsList = new ArrayList<HashMap<String, String>>();
lv = getListView();
// Calling async task to get json
new GetTunesDetails().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetTunesDetails extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
tunes = jsonObj.getJSONArray(TAG_RESULT);
// looping through All Products
for (int i = 0; i < tunes.length(); i++) {
JSONObject c = tunes.getJSONObject(i);
artworkImage = c.getString("artworkUrl100");
wrapperType = c.getString("wrapperType");
artistName = c.getString("artistName");
collectionName = c.getString("collectionName");
trackName = c.getString("trackName");
collectionPrice = c.getString("collectionPrice");
trackId = c.getString("trackId");
// tmp hashmap for single contact
HashMap<String, String> tunesMap = new HashMap<String,
String>();
// adding each child node to HashMap key => value
// contact.put(TAG_ID, firstname);
tunesMap.put(TAG_ARTWORK_IMAGE, artworkImage);
tunesMap.put(TAG_WRAPPER_TYPE, wrapperType);
tunesMap.put(TAG_ARTIST_NAME, artistName);
tunesMap.put(TAG_COLLECTION_NAME, collectionName);
tunesMap.put(TAG_TRACK_NAME, trackName);
tunesMap.put(TAG_COLLECTION_PRICE, collectionPrice);
tunesMap.put(TAG_TRACK_ID, trackId);
// adding contact to contact list
resultsList.add(tunesMap);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(MainActivity.this, resultsList);
// Set the adapter to the ListView
lv.setAdapter(adapter);
}
}
ListViewAdapter.java
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
int position;
TextView wrapperType, artistName, collectionName, trackName,
collectionPrice;
ImageView artworkImage;
public ListViewAdapter(Context context, ArrayList<HashMap<String, String>>
arraylist) {
this.context = context;
data = arraylist;
imageLoader = new ImageLoader(context);
}
#Override
public int getCount() {
return data.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
// this.position = position;
inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.custom_row, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
wrapperType = (TextView) itemView.findViewById(R.id.wrapperType);
artistName = (TextView) itemView.findViewById(R.id.artistName);
collectionName = (TextView) itemView.findViewById(R.id.collectionName);
trackName = (TextView) itemView.findViewById(R.id.trackName);
collectionPrice = (TextView)
itemView.findViewById(R.id.collectionPrice);
// Locate the ImageView in listview_item.xml
artworkImage = (ImageView) itemView.findViewById(R.id.artworkImage);
// Capture position and set results to the TextViews
wrapperType.setText(resultp.get(MainActivity.TAG_WRAPPER_TYPE));
artistName.setText(resultp.get(MainActivity.TAG_ARTIST_NAME));
collectionName.setText(resultp.get(MainActivity.TAG_COLLECTION_NAME));
trackName.setText(resultp.get(MainActivity.TAG_TRACK_NAME));
collectionPrice.setText(resultp.get(MainActivity.TAG_COLLECTION_PRICE));
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(resultp.get(MainActivity.TAG_ARTWORK_IMAGE),
artworkImage);
// Capture ListView item click
itemView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) { // TODO Auto-generated method
Toast.makeText(context, "Clicked at position " + position,
Toast.LENGTH_LONG).show();
Intent intent = new Intent(context, SingleTrack.class);
intent.putExtra("track_image",
resultp.get(MainActivity.TAG_ARTWORK_IMAGE));
intent.putExtra("wrapper_type",
resultp.get(MainActivity.TAG_WRAPPER_TYPE));
intent.putExtra("artistName",
resultp.get(MainActivity.TAG_ARTIST_NAME));
intent.putExtra("collectionName",
resultp.get(MainActivity.TAG_COLLECTION_NAME));
intent.putExtra("trackName",
resultp.get(MainActivity.TAG_TRACK_NAME));
intent.putExtra("collectionPrice",
resultp.get(MainActivity.TAG_COLLECTION_PRICE));
intent.putExtra("trackId",
resultp.get(MainActivity.TAG_TRACK_ID));
context.startActivity(intent);
}
});
return itemView;
}
SingleTrack.java : This is the class where i displaying the details on single item click
public class SingleTrack extends Activity {
// URL to get contacts JSON
private static String url = "";
// JSON Node names
static final String TAG_RESULT = "results";
static final String TAG_ARTWORK_IMAGE = "artworkUrl100";
static final String TAG_WRAPPER_TYPE = "wrapperType";
static final String TAG_ARTIST_NAME = "artistName";
static final String TAG_COLLECTION_NAME = "collectionName";
static final String TAG_TRACK_NAME = "trackName";
static final String TAG_COLLECTION_PRICE = "collectionPrice";
static final String TAG_TRACK_ID = "trackId";
// contacts JSONArray
JSONArray tracks = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> singleTrackDetails;
ProgressDialog pDialog;
String passedData1, passedData2, passedData3, passedData4, passedData5,
passedData6, passedData7;
TextView wrapperTypeText, artistNameText, collectionNameText, trackNameText,
collectionPriceText;
ImageView trackImage;
String artworkImage, wrapperType, artistName, collectionName, trackName,
collectionPrice, trackId;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.single_track);
wrapperTypeText = (TextView) findViewById(R.id.wrapperType1);
artistNameText = (TextView) findViewById(R.id.artistName1);
collectionNameText = (TextView) findViewById(R.id.collectionName1);
trackNameText = (TextView) findViewById(R.id.trackName1);
collectionPriceText = (TextView) findViewById(R.id.collectionPrice);
trackImage = (ImageView) findViewById(R.id.artworkImage1);
passedData1 = getIntent().getStringExtra("track_image");
passedData2 = getIntent().getStringExtra("wrapper_type");
passedData3 = getIntent().getStringExtra("artistName");
passedData4 = getIntent().getStringExtra("collectionName");
passedData5 = getIntent().getStringExtra("trackName");
passedData6 = getIntent().getStringExtra("collectionPrice");
passedData7 = getIntent().getStringExtra("trackId");
singleTrackDetails = new ArrayList<HashMap<String, String>>();
// url
url = "https://itunes.apple.com/lookup?id=" + passedData7;
// Calling async task to get json
new GetSingleTrackDetails().execute();
}
class GetSingleTrackDetails extends AsyncTask<String, Void, String> {
private JSONObject jsonObj;
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(SingleTrack.this);
pDialog.setMessage("Loading Track Details...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected String doInBackground(String... params) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
tracks = jsonObj.getJSONArray(TAG_RESULT);
// looping through All Products
for (int i = 0; i < tracks.length(); i++) {
JSONObject c = tracks.getJSONObject(i);
artworkImage = c.getString("artworkUrl100");
wrapperType = c.getString("wrapperType");
artistName = c.getString("artistName");
collectionName = c.getString("collectionName");
trackName = c.getString("trackName");
collectionPrice = c.getString("collectionPrice");
trackId = c.getString("trackId");
// tmp hashmap for single contact
HashMap<String, String> tunesMap = new HashMap<String,
String>();
// adding each child node to HashMap key => value
// contact.put(TAG_ID, firstname);
tunesMap.put(TAG_ARTWORK_IMAGE, artworkImage);
tunesMap.put(TAG_WRAPPER_TYPE, wrapperType);
tunesMap.put(TAG_ARTIST_NAME, artistName);
tunesMap.put(TAG_COLLECTION_NAME, collectionName);
tunesMap.put(TAG_TRACK_NAME, trackName);
tunesMap.put(TAG_COLLECTION_PRICE, collectionPrice);
tunesMap.put(TAG_TRACK_ID, trackId);
// adding contact to contact list
singleTrackDetails.add(tunesMap);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
wrapperTypeText.setText(wrapperType);
artistNameText.setText(artistName);
collectionNameText.setText(collectionName);
trackNameText.setText(trackName);
collectionPriceText.setText(collectionPrice);
}
}
Thank you

The problem is that you are initializing the resultp each element in your getView method, so therefore the last id/element of the listview adapter's data will be considered as the resultp.
Im sure that the id 659234741 is the last element, which will always be the id for each onclick that would happen.
A solution for this is to create a final resultp within your getView method instead of having just one global resultp.
final HashMap<String, String> resultp = data.get(position);

Base Adapter in Asynctask not working

I am working with facebook app for my project and I'm getting a json from the graph API. I have a custom listView with hashMap, but when I run, the list wont populate but there isn't any errors. please help me.
here are the codes:
public class PageFeedHome extends Fragment {
ArrayList<HashMap<String, String>> feedList;
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_MESSAGE = "message";
private String feedMessage;
ListView listView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.feed_home_activity,
container, false);
listView = (ListView) view.findViewById(R.id.feed_lv);
feedList = new ArrayList<HashMap<String, String>>();
new LoadPosts().execute();
BaseAdapter adapter = new SimpleAdapter(getActivity(), feedList,
R.layout.feed_item_view, new String[] { TAG_MESSAGE, TAG_NAME,
TAG_ID }, new int[] { R.id.message, R.id.author,
R.id.id_tv });
listView.setAdapter(adapter);
adapter.notifyDataSetChanged();
return view;
}
private class LoadPosts extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
Session.openActiveSession(getActivity(), true,
new Session.StatusCallback() {
// callback when session changes state
#Override
public void call(Session session, SessionState state,
Exception exception) {
if (session.isOpened()) {
new Request(session, "/163340583656/feed",
null, HttpMethod.GET,
new Request.Callback() {
public void onCompleted(
Response response) {
/* handle the result */
Log.i("PostFeedResponse", response.toString());
try {
GraphObject graphObj = response
.getGraphObject();
JSONObject json = graphObj
.getInnerJSONObject();
JSONArray jArray = json
.getJSONArray("data");
for (int i = 0; i < jArray.length(); i++) {
JSONObject currObj = jArray.getJSONObject(i);
final String feedId = currObj.getString("id");
if (currObj.has("message")) {
feedMessage = currObj.getString("message");
} else if (currObj.has("story")) {
feedMessage = currObj.getString("story");
} else {
feedMessage = "Posted a something";
}
JSONObject fromObj = currObj.getJSONObject("from");
String from = fromObj.getString("name");
HashMap<String, String> feed = new HashMap<String, String>();
feed.put(TAG_ID, feedId);
feed.put(TAG_MESSAGE, feedMessage);
feed.put(TAG_NAME, from);
feedList.add(feed);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).executeAsync();
}
}
});
return null;
}
}
}

Move this code :
BaseAdapter adapter = new SimpleAdapter(getActivity(), feedList,
R.layout.feed_item_view, new String[] { TAG_MESSAGE, TAG_NAME,
TAG_ID }, new int[] { R.id.message, R.id.author,
R.id.id_tv }); //initialize adapter
listView.setAdapter(adapter); //set adapter
adapter.notifyDataSetChanged();
To the AsyncTask's onPostExecute to make sure the feedList is already inserted from the onBackground.
Or if you prefer to initialize your adapter and setting the adapter to the listview in the onCreate, just move adapter.notifyDataSetChanged(); to the onPostExecute. This is recommended if you call the AsyncTask multiple times, because theres no need to initialize and set the adapter multiple times. (see my comment in the code)

ArrayList<HashMap<String, String>> feedList;
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_MESSAGE = "message";
private String feedMessage;
ListView listView;
BaseAdapter adapter;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.feed_home_activity,
container, false);
listView = (ListView) view.findViewById(R.id.feed_lv);
feedList = new ArrayList<HashMap<String, String>>();
BaseAdapter adapter = new SimpleAdapter(getActivity(), feedList,
R.layout.feed_item_view, new String[] { TAG_MESSAGE, TAG_NAME,
TAG_ID }, new int[] { R.id.message, R.id.author,
R.id.id_tv });
listView.setAdapter(adapter);
new LoadPosts().execute();
return view;
}
private class LoadPosts extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
Session.openActiveSession(getActivity(), true,
new Session.StatusCallback() {
// callback when session changes state
#Override
public void call(Session session, SessionState state,
Exception exception) {
if (session.isOpened()) {
new Request(session, "/163340583656/feed",
null, HttpMethod.GET,
new Request.Callback() {
public void onCompleted(
Response response) {
/* handle the result */
Log.i("PostFeedResponse", response.toString());
try {
GraphObject graphObj = response
.getGraphObject();
JSONObject json = graphObj
.getInnerJSONObject();
JSONArray jArray = json
.getJSONArray("data");
for (int i = 0; i < jArray.length(); i++) {
JSONObject currObj = jArray.getJSONObject(i);
final String feedId = currObj.getString("id");
if (currObj.has("message")) {
feedMessage = currObj.getString("message");
} else if (currObj.has("story")) {
feedMessage = currObj.getString("story");
} else {
feedMessage = "Posted a something";
}
JSONObject fromObj = currObj.getJSONObject("from");
String from = fromObj.getString("name");
HashMap<String, String> feed = new HashMap<String, String>();
feed.put(TAG_ID, feedId);
feed.put(TAG_MESSAGE, feedMessage);
feed.put(TAG_NAME, from);
feedList.add(feed);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).executeAsync();
}
}
});
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
Toast.makeText(getApplicationContext(), ""+feedList.size(), Toast.LENGTH_LONG).show();
adapter.notifyDataSetChanged();
}
}
}

Where do I put the function to display the loading process?

I want to display a loading process when my application is loading data from the database.
This is my Java file.
Where do I have to put the function to display the loading process?
public class AksesServerActivity extends ListActivity {
private static String link_url = "http://plnskh.zz.mu/android/berita/cekdaftar.php";
private static final String AR_ID = "id";
private static final String AR_JUDUL = "judul";
private static final String AR_CONTENT = "content";
JSONArray artikel = null;
ArrayList<HashMap<String, String>> daftar_artikel = new ArrayList<HashMap<String, String>>();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
JSONParser jParser = new JSONParser();
JSONObject json = jParser.AmbilJson(link_url);
try {
artikel = json.getJSONArray("artikel");
for(int i = 0; i < artikel.length(); i++){
JSONObject ar = artikel.getJSONObject(i);
String id = ar.getString(AR_ID);
String judul = ar.getString(AR_JUDUL);
String content = ar.getString(AR_CONTENT).substring(0,100)+"...(baca selengkapnya)";
HashMap<String, String> map = new HashMap<String, String>();
map.put(AR_ID, id);
map.put(AR_JUDUL, judul);
map.put(AR_CONTENT, content);
daftar_artikel.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
this.adapter_listview();
}
public void adapter_listview() {
ListAdapter adapter = new SimpleAdapter(this, daftar_artikel,
R.layout.list_item,
new String[] { AR_JUDUL, AR_CONTENT, AR_ID}, new int[] {
R.id.judul, R.id.content, R.id.kode});
setListAdapter(adapter);
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
String kode = ((TextView) view.findViewById(R.id.kode)).getText().toString();
Intent in = new Intent(AksesServerActivity.this, DetailAksesServer.class);
in.putExtra(AR_ID, kode);
startActivity(in);
}
});
}
}

public class LongOperation extends AsyncTask<String, String, String>
{
ProgressDialog pdialog;
#Override
protected String doInBackground(String... params) {
JSONParser jParser = new JSONParser();
JSONObject json = jParser.AmbilJson(link_url);
try {
artikel = json.getJSONArray("artikel");
for(int i = 0; i < artikel.length(); i++){
JSONObject ar = artikel.getJSONObject(i);
String id = ar.getString(AR_ID);
String judul = ar.getString(AR_JUDUL);
String content = ar.getString(AR_CONTENT).substring(0,100)+"...(baca selengkapnya)";
HashMap<String, String> map = new HashMap<String, String>();
map.put(AR_ID, id);
map.put(AR_JUDUL, judul);
map.put(AR_CONTENT, content);
daftar_artikel.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pdialog.dismiss();
this.adapter_listview();
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pdialog = new ProgressDialog(NewsActivity.this);
pdialog.setMessage("Loading");
pdialog.show();
}
}
for more clarification about asynchronous task and its methods, check here

You must use AsyncTask class, override doInBackground method to perform your databse fetch, onPreExecute method to show your loading and onPostExecute to hide it. you can refer AsynTask process and AsynTask post for more information

Android - How to get specific data from URL/JSON?

So I have this code, which is a page with a ListView search field and a button to confirm the search, when the button is pressed the ListView is filled with movie names from the Rotten Tomatoes API, The problem is that someone helped me with this code, and I would love some help breaking it down and understanding it sentence after sentence, My main goal is to get is to get the "title", "synopsis" and "url image" of a movie that was clicked in the list, and pass it with an intent to my other activity but the whole JSON and get specific data stuff, got me very confused.
Link to Rotten Tomatoes API documentation, this is my code:
public class MovieAddFromWeb extends Activity implements View.OnClickListener,
OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
#Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}
}

see the modified code below..
public class MovieAddFromWeb extends Activity implements View.OnClickListener, OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
//added new variables
public List<String> movieSynopsis;
public List<String> movieImgUrl;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
//newly added
movieSynopsis = new ArrayList<String>();
movieImgUrl= new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
movieSynopsis.add(movie.getString(#add the synopsis var name returned by the JSON));
movieImgUrl.add(movie.getString(#add the urlvar name returned by the JSON));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
#Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
//newly added
openMovieEditor.putExtra("movieSynopsis", movieSynopsis.get(position));
openMovieEditor.putExtra("movieImgUrl", movieImgUrl.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

App crashes at setImageResource() - java

Here you can get a solution. ((ImageView)findViewById(R.id.image_view1)).setImageResource(R.drawable.cover); XML Snippet: <ImageView android:id="#+id/image_view1" android:layout_width="wrap_content" android:layout_height="wrap_content" />

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Base Adapter in Asynctask not working

Where do I put the function to display the loading process?

Android - How to get specific data from URL/JSON?

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