Load an image from URL database

Load an image from URL database - java

First code:
`db_img = Jasonobject.getString("image");
imagelink.setText(db_img);`
The code above is grab the data from mysql database.
"imagelink" is textview.
The code will display the data into textview
"image"from mysql is string because is url link.
Second code:
new DownloadImageTask((ImageView) findViewById(R.id.qrimg)).
execute("http://localhost/project/image/pic1.jpg");
The second code is load the image base on the URL
My problem is how to pass the value from first code into .execute("HERE")
Code:
`
EditText etacode;
EditText txtName;
Button btnscanitem;
//testing
TextView imagelink;
//hidden textview
TextView texttime;
TextView textunit;
TextView textrm;
TextView textexp;
Button btnconfrim;
ImageView img;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.acode);
btnscanitem = (Button) findViewById(R.id.btnscanitem);
etacode = (EditText) findViewById(R.id.etacode);
etacode.setVisibility(View.GONE);
//testing
imagelink = (TextView) findViewById(R.id.imagelink);
btnconfrim = (Button) findViewById(R.id.btnconfrim);
btnconfrim.setVisibility(View.GONE);
img = (ImageView) findViewById(R.id.img);
img.setVisibility(View.GONE);
img.setImageResource(0);
}
class task extends AsyncTask<String, String, Void>
{
private ProgressDialog progressDialog = new ProgressDialog(AcodeActivity.this);
InputStream is = null ;
String result = "";
protected void onPreExecute() {
progressDialog.setMessage("Fetching data...");
progressDialog.show();
progressDialog.setOnCancelListener(new OnCancelListener() {
public void onCancel(DialogInterface arg0) {
task.this.cancel(true);
}
});
}
#Override
protected Void doInBackground(String... params) {
String url_select = "http://Localhost/getproduct.php";
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url_select);
ArrayList<NameValuePair> param = new ArrayList<NameValuePair>();
try {
httpPost.setEntity(new UrlEncodedFormEntity(param));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
//read content
is = httpEntity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection "+e.toString());
}
try {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = "";
while((line=br.readLine())!=null)
{
sb.append(line+"\n");
}
is.close();
result=sb.toString();
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error converting result "+e.toString());
}
return null;
}
protected void onPostExecute(Void v) {
// Fetch data from Json database
try {
JSONArray Jarray = new JSONArray(result);
for(int i=0;i<Jarray.length();i++)
{
JSONObject Jasonobject = null;
Jasonobject = Jarray.getJSONObject(i);
String apromoid = Jasonobject.getString("aid");
String db_img="";
if(etcode.getText().toString().equalsIgnoreCase(apromoid)) {
db_img = Jasonobject.getString("image");
imagelink.setText(db_img);
String temp;
temp = db_img;
//String imagelink = temp;
//(db_img);
break;
}
}
this.progressDialog.dismiss();
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error parsing data "+e.toString());
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.acodescanner, menu);
return true;
}
public void onClick (View view){
if(view.getId() == R.id.btnscanitem){
IntentIntegrator integrator = new IntentIntegrator(this);
integrator.initiateScan();
}
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanResult != null) {
// handle scan result
String acode;
acode = scanResult.getContents();
EditText etacode = (EditText) findViewById(R.id.etacode);
etacode.setText(acode);
new task().execute();
//String textlink = getimagelink;
new DownloadImageTask((ImageView) findViewById(R.id.qrimg))
.execute(db_img);
}
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
`

Related

how to fetch data without button click

how to fetch first image without click fetch image button
click to view image
this code work fine but on click fetch image button but i want fetch image with out click fetch images button i want to remove this button
Public class MainActivity extends AppCompatActivity implements
View.OnClickListener {
private String imagesJSON;
private static final String JSON_ARRAY ="result";
private static final String IMAGE_URL = "url";
private JSONArray arrayImages= null;
private int TRACK = 0;
private static final String IMAGES_URL = "http://www.simplifiedcoding.16mb.com/ImageUpload/getAllImages.php";
private Button buttonFetchImages;
private Button buttonMoveNext;
private Button buttonMovePrevious;
private ImageView imageView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.imageView);
buttonFetchImages = (Button) findViewById(R.id.buttonFetchImages);
buttonMoveNext = (Button) findViewById(R.id.buttonNext);
buttonMovePrevious = (Button) findViewById(R.id.buttonPrev);
buttonFetchImages.setOnClickListener(this);
buttonMoveNext.setOnClickListener(this);
buttonMovePrevious.setOnClickListener(this);
}
private void extractJSON(){
try {
JSONObject jsonObject = new JSONObject(imagesJSON);
arrayImages = jsonObject.getJSONArray(JSON_ARRAY);
} catch (JSONException e) {
e.printStackTrace();
}
}
private void showImage(){
try {
JSONObject jsonObject = arrayImages.getJSONObject(TRACK);
getImage(jsonObject.getString(IMAGE_URL));
} catch (JSONException e) {
e.printStackTrace();
}
}
private void moveNext(){
if(TRACK < arrayImages.length()){
TRACK++;
showImage();
}
}
private void movePrevious(){
if(TRACK>0){
TRACK--;
showImage();
}
}
private void getAllImages() {
class GetAllImages extends AsyncTask<String,Void,String>{
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(MainActivity.this, "Fetching Data...","Please Wait...",true,true);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
imagesJSON = s;
extractJSON();
showImage();
}
#Override
protected String doInBackground(String... params) {
String uri = params[0];
BufferedReader bufferedReader = null;
try {
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
StringBuilder sb = new StringBuilder();
bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String json;
while((json = bufferedReader.readLine())!= null){
sb.append(json+"\n");
}
return sb.toString().trim();
}catch(Exception e){
return null;
}
}
}
GetAllImages gai = new GetAllImages();
gai.execute(IMAGES_URL);
}
private void getImage(String urlToImage){
class GetImage extends AsyncTask<String,Void,Bitmap>{
ProgressDialog loading;
#Override
protected Bitmap doInBackground(String... params) {
URL url = null;
Bitmap image = null;
String urlToImage = params[0];
try {
url = new URL(urlToImage);
image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(MainActivity.this,"Downloading Image...","Please wait...",true,true);
}
#Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
loading.dismiss();
imageView.setImageBitmap(bitmap);
}
}
GetImage gi = new GetImage();
gi.execute(urlToImage);
}
#Override
public void onClick(View v) {
if(v == buttonFetchImages) {
getAllImages();
}
if(v == buttonMoveNext){
moveNext();
}
if(v== buttonMovePrevious){
movePrevious();
}
}
}

You can trigger it in onCreate(),but you must not run it on UI thread,for it might be a time-consuming operation.Read Specifying the Code to Run on a Thread to help,
you might add the following block in your onCreate() method:
new Runnable() {
#Override
public void run() {
getAllImages();
}
}.run();

Get a variable form onItemListener and use it in another function

private class BackTask extends AsyncTask<Void, Void, Void> {
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(context);
pd.setTitle("Retrieving data");
pd.setMessage("Please wait.");
pd.setCancelable(true);
pd.setIndeterminate(true);
pd.show();
}
protected Void doInBackground(Void... params) {
InputStream is = null;
String result = "";
try {
httpclient = new DefaultHttpClient();
// i want to use httppost in this ligne
response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
} catch (Exception e) {
if (pd != null)
pd.dismiss(); // close the dialog if error occurs
Log.e("ERROR", e.getMessage());
}
// convert response to string
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e) {
Log.e("ERROR", "Error converting result " + e.toString());
}
// parse json data
try {
result = result.substring(result.indexOf("["));
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
Prog2 p = new Prog2();
p.setTitre_emission(json_data.getString("titre_emission"));
p.setDesc_emission(json_data.getString("desc_emission"));
p.setHeure_emission(json_data.getString("heure_emission"));
p.setChaine_emission(json_data.getString("titre_chaine"));
records.add(p);
}
}
catch (Exception e) {
Log.e("ERROR", "Error pasting data " + e.toString());
}
return null;
}
protected void onPostExecute(Void result) {
if (pd != null)
pd.dismiss(); // close dialog
Log.e("size", records.size() + "");
adapter.notifyDataSetChanged(); // notify the ListView to get new
// records
}
}
How can I get a text from onItemListener and use it in an other function for getting an httpost?
When I use getText() I get an error
public class Wataneya1Activity extends AppCompatActivity {
Toolbar mToolbar;
Spinner mSpinner;
String text;
Activity context;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
ProgressDialog pd;
CustomAdapter1 adapter;
ListView listProg;
ArrayList<Prog1> records;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wataneya1);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ImageButton mButton = (ImageButton) findViewById(R.id.Button03);
mButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Wataneya1Activity.this.finish();
}
});
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
final ActionBar actionBar = getSupportActionBar();
mSpinner = (Spinner) findViewById(R.id.spinner_rss);
String[] items = getResources().getStringArray(R.array.days_array);
List<String> spinnerItems = new ArrayList<>();
for (int i = 0; i < items.length; i++) {
spinnerItems.add(items[i]);
}
SpinnerAdapter adapter1 = new SpinnerAdapter(actionBar.getThemedContext(), spinnerItems);
mSpinner.setAdapter(adapter1);
mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View view, int arg2, long arg3) {
text = mSpinner.getSelectedItem().toString();
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
context = this;
records = new ArrayList<Prog1>();
listProg = (ListView) findViewById(R.id.prog_list);
adapter = new CustomAdapter1(context, R.layout.list_item, R.id.titre_emission, records);
listProg.setAdapter(adapter);
}
public HttpPost fnt (String text) {
if (text.equals("Mardi")) {
httppost = new HttpPost("http://192.168.:8080/TuniTV/prog_wataneya1_mardi.php");
} else if (text.equals("Mercredi")) {
httppost = new HttpPost("http://192.168:8080/TuniTV/prog_wataneya1_mercredi.php");
} else if (text.equals("Jeudi")) {
httppost = new HttpPost("http://192.168/TuniTV/prog_wataneya1_jeudi.php");
} else if (text.equals("Vendredi")) {
httppost = new HttpPost("http://192.168:8080/TuniTV/prog_wataneya1_vendredi.php");
} else if (text.equals("Samedi")) {
httppost = new HttpPost("http://192.168:8080/TuniTV/prog_wataneya1_samedi.php");
} else if (text.equals("Dimanche")) {
httppost = new HttpPost("http://192.168:8080/TuniTV/prog_wataneya1_dimanche.php");
} else {
httppost = new HttpPost("http://192.168:8080/TuniTV/prog_wataneya1_lundi.php");
}
return httppost;
}

You receive the click position ( == index into your data) in the callback method. Use it to find the data in your data array.
#Override
public void onItemSelected(AdapterView<?> arg0, View view, int arg2, long arg3) {
text = spinnerItems.get(arg3);
Toast.makeText(getApplicationContext(), text,
Toast.LENGTH_SHORT).show();
}
Btw... Telling us there is a mistake - is crap.
Telling us what kind of mistake it is or even showing some stacktrace? Great stuff.

How to integrate with jsonwebservices in Android?

I'm implementing json_web services in my Android application. I want to send the json data on jsonwebservices which is created in Java. When I run the application data does not send from the Android and does not show any error and also does not show any type of exception.
How can I identify whether my data is sent or not?
Here is my Activity Code:
public class Login extends Activity
{
Button btnLogin;
EditText etextUsername , etextPassword;
String strUserName , strPassWord ;
ProgressDialog pDialog;
JSONObject jObject ;
SharedPreferences.Editor editor;
SharedPreferences sharedPref1;
String str_Device_IP_Address=null;
JSONArray user = null;
String pref_filename = "IP_ADDRESS";
static final String KEY_REQUEST_ID = "RequestId";
static final String KEY_REQUEST_CODE = "RequestCode";
static final String KEY_CHANNEL_ID = "ChannelId";
static final String KEY_IP_ADDRESS="IPAddress";
static final String KEY_USERNAME="UserId";
static final String KEY_PASSWORD="Password";
static final String KEY_REQUEST="Request";
static final String KEY_VENDOR_ID="VendorId";
String RequestId="77777";
String RequestCode="001";
String stringChannelId="MobileApp";
String strIpAddress = null;
private String textToEncrypt = "Hi, this is a test to check its gone work or not.";
String encrypted = "MzA3RDBCMjMxMjQzNzcxREUxMUYxNjg1NzgwOTU1MjU1M0FDOUZEN0M3Q0JGQ0Q5MTI2NEIyNTE2"
+ "OTQwQTc3NjM2QTBCRDFDMUEyNkUwRjlDMzQwN0U0MEI0NDg2M0JBMDU1OThCNTI1NTZCMEFGNjk1NjJFNzZBMUE0NzM4NTQ=";
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
final Context context = getApplicationContext();
connectWithHttpGet_IpAddress();
etextUsername = (EditText)findViewById(R.id.edittext_username);
etextPassword = (EditText)findViewById(R.id.edittext_password);
btnLogin=(Button)findViewById(R.id.button_Login);
btnLogin.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
if (!isOnline())
{
showNoConnectionDialog(Login.this);
}
else
{
connectWithHttpGet_LoginData();
}
}
});
}
private void connectWithHttpGet_LoginData()
{
class GetJSONParse extends AsyncTask<String, Integer, JSONObject>
{
#Override
protected void onPreExecute()
{
super.onPreExecute();
str_Device_IP_Address=sharedPref1.getString("ip_address", "a\n");
System.out.println("strCode in Gsk_Demo ="+str_Device_IP_Address);
strUserName = etextUsername.getText().toString().trim();
strPassWord = etextPassword.getText().toString().trim();
pDialog = new ProgressDialog(Login.this);
pDialog.setIndeterminate(true);
pDialog.setCancelable(true);
pDialog.show();
System.out.println("Progress Dialog!!!!!!!!!!!!!!!!!!!!!!!");
}
#Override
protected JSONObject doInBackground(String... args)
{
String strUrl = "http://test.xxxxxx.com/cms/json/w2iWS";
JSONParser jParser = new JSONParser();
Log.e("DoinBackground !!!!!","Method");
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(strUrl);
String jsonString=json.toString();
Log.e("jsonString in DoinBackground !!!!!","Method" + jsonString);
return json;
}
#Override
protected void onPostExecute(JSONObject json)
{
pDialog.dismiss();
try
{
// Getting JSON Array
user = json.getJSONArray( KEY_REQUEST_ID );
JSONObject jsonObject = user.getJSONObject(0);
jsonObject.put(KEY_REQUEST_CODE, RequestCode);
jsonObject.put(KEY_CHANNEL_ID, stringChannelId);
jsonObject.put(KEY_IP_ADDRESS, str_Device_IP_Address);
jsonObject.put(KEY_USERNAME, strUserName);
jsonObject.put(KEY_PASSWORD, strPassWord);
String encrypted1 = EncodeDecodeAES.encrypt(jsonObject.toString(), textToEncrypt);
System.out.println("encrypted1 =" + encrypted1);
JSONObject inner = new JSONObject();
inner.put(KEY_REQUEST, encrypted1);
inner.put(KEY_VENDOR_ID, "1");
String decrypted = EncodeDecodeAES.decrypt(jsonObject.toString(), encrypted);
System.out.println("decrypted =" + decrypted);
}
catch (JSONException e)
{
e.printStackTrace();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
GetJSONParse getjsonparse = new GetJSONParse();
getjsonparse.execute();
}
// Get Ip Address
private void connectWithHttpGet_IpAddress() {
class httpGetAsynchTask extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
HttpClient httpClient = new DefaultHttpClient();
String url = "http://api.externalip.net/ip";
Log.e("!!STRING URL DATE DETAIL", "" + url);
HttpGet httpGet = new HttpGet(url);
Log.e("", "" + httpGet);
try {
HttpResponse httpResponse = httpClient.execute(httpGet);
Log.e("HTTP.RESPONSE.DATE.DTAIL", "" + httpResponse);
System.out.println("HTTPRESPONSE");
InputStream inpustream = httpResponse.getEntity()
.getContent();
InputStreamReader inputstreamreader = new InputStreamReader(
inpustream);
BufferedReader bufferedreader = new BufferedReader(
inputstreamreader);
StringBuilder stringbuilder = new StringBuilder();
Log.e("", "" + stringbuilder);
String strbuffer = null;
while ((strbuffer = bufferedreader.readLine()) != null)
{
stringbuilder.append(strbuffer);
}
String strResponse = stringbuilder.toString();
/****************** Code For Shared Preferences **************************************/
sharedPref1 = getSharedPreferences(pref_filename, 0);
editor = sharedPref1.edit();
editor.putString("ip_address", strResponse);
Log.e("Returning value of doInBackground REsponse:" ,strResponse);
System.out.println("IPADDRESS IN DOIN BACKGRAOUND");
editor.commit();
/***************** Code For Shared Preferences **************************************/
}
catch (ClientProtocolException cpe) {
cpe.printStackTrace();
Log.e("Exception generates caz of httpResponse :", "-"
+ cpe);
}
catch (IOException ioe) {
ioe.printStackTrace();
Log.e("Second exception generates caz of httpResponse :",
"-" + ioe);
}
return null;
}
}
httpGetAsynchTask httpGetAsyncTask = new httpGetAsynchTask();
httpGetAsyncTask.execute();
}
public static void showNoConnectionDialog(final Login login)
{
AlertDialog.Builder builder = new AlertDialog.Builder(login);
builder.setCancelable(true);
builder.setMessage(R.string.no_connection);
builder.setTitle(R.string.no_connection_title);
builder.setPositiveButton(R.string.settings_button_text, new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which)
{
login.startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
}
});
builder.setNegativeButton(R.string.cancel_button_text, new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which)
{
return;
}
});
builder.setOnCancelListener(new DialogInterface.OnCancelListener()
{
#Override
public void onCancel(DialogInterface dialog) {
return;
}
});
builder.show();
}
public boolean isOnline()
{
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()
&& cm.getActiveNetworkInfo().isAvailable()
&& cm.getActiveNetworkInfo().isConnected())
{
return true;
}
else
{
return false;
}
}
}

Asynctask is not invoked
JSONParse jp =new JSONParse();
jp.execute(params);
http://developer.android.com/reference/android/os/AsyncTask.html
public final AsyncTask<Params, Progress, Result> execute (Params... params)
Executes the task with the specified parameters.
You had no invoked asynctask before
GetJSONParse get = new GetJSONParse();
get.execute(params);
And you said i can't see the log message in doInbackground. i just ran your code and i can see the log

In Android: How can i send the result of from OnPostExecute() to other activity?

I got the result of OnPostExecute() to main activity but I want to use this result in second activity. I read and applied something with using Bundle but it doesn't run. I got error NullPointerException cause of not receiving the value in the second activity. Here is my MainActivity (It has an interface AsyncResponse ):
public class MainActivity extends Activity implements AsyncResponse
{
public String t;
public Bundle bnd;
public Intent intent;
public String sending;
private static final String TAG = "MyActivity";
ProductConnect asyncTask =new ProductConnect();
public void processFinish(String output){
sending=output;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
asyncTask.delegate = this;
setContentView(R.layout.activity_main);
Button b = (Button) findViewById(R.id.button1);
bnd=new Bundle();
intent=new Intent(MainActivity.this, second.class);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
asyncTask.execute(true);
bnd.putString("veri", sending);
intent.putExtras(bnd);
startActivity(intent);
}
});
}
// START DATABASE CONNECTION
class ProductConnect extends AsyncTask<Boolean, String, String> {
public AsyncResponse delegate=null;
private Activity activity;
public void MyAsyncTask(Activity activity) {
this.activity = activity;
}
#Override
protected String doInBackground(Boolean... params) {
String result = null;
StringBuilder sb = new StringBuilder();
try {
// http post
HttpClient httpclient = new DefaultHttpClient();
HttpGet httppost = new HttpGet(
"http://192.168.2.245/getProducts.php");
HttpResponse response = httpclient.execute(httppost);
if (response.getStatusLine().getStatusCode() != 200) {
Log.d("MyApp", "Server encountered an error");
}
BufferedReader reader = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent(), "UTF8"));
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
result = sb.toString();
Log.d("test", result);
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
return result;
}
#Override
protected void onPostExecute(String result) {
try {
JSONArray jArray = new JSONArray(result);
JSONObject json_data;
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
t = json_data.getString("name");
delegate.processFinish(t);
}
} catch (JSONException e1) {
e1.printStackTrace();
} catch (ParseException e1) {
e1.printStackTrace();
}
super.onPostExecute(result);
}
protected void onPreExecute() {
super.onPreExecute();
ProgressDialog pd = new ProgressDialog(MainActivity.this);
pd.setTitle("Please wait");
pd.setMessage("Authenticating..");
pd.show();
}
}
Here is My Second Activity:
public class second extends ActionBarActivity {
public CharSequence mTitle;
private static final String TAG = "MyActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
Bundle receive=getIntent().getExtras();
String get=receive.getString("veri");
Log.v(TAG, get);
}
What should i do?

AsyncTask.execute() is a non-blocking call. You can't set the result to the Bundle and start an Intent immediatly after execute(). That's why you are getting a NPE in your second Activity because sending isn't initialized, so it's null.
Move the code to start a new Activity with the desired data in your callback:
public void processFinish(String output){
bnd.putString("veri", output);
intent.putExtras(bnd);
startActivity(intent);
}
And make sure you call delegate.processFinished(String) if your data processing is finished. So move it out of the for loop. BTW t will only get the last "name"-String in the JSONArray. If you wanna get them all make t a String array and fill it.

As your variable t is globally declared in your activity so can directly use the value of t which you are assigning in your onPostExecute() method. Just you need to check for its null value only in your button click event as below :
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
asyncTask.execute(true);
if(t != null || t != "")
{
bnd.putString("veri", t);
intent.putExtras(bnd);
startActivity(intent);
}
}
});

// try this
public class MainActivity extends Activity
{
public String t;
public Bundle bnd;
public Intent intent;
private static final String TAG = "MyActivity";
ProductConnect asyncTask;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = (Button) findViewById(R.id.button1);
bnd=new Bundle();
intent=new Intent(MainActivity.this, second.class);
asyncTask = new ProductConnect(new ResultListener() {
#Override
public void onResultGet(String value) {
bnd.putString("veri", value);
intent.putExtras(bnd);
startActivity(intent);
}
});
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
asyncTask.execute(true);
}
});
}
class ProductConnect extends AsyncTask<Boolean, String, String> {
private ResultListener target;
public ProductConnect(ResultListener target) {
this.target = target;
}
#Override
protected String doInBackground(Boolean... params) {
String result = null;
StringBuilder sb = new StringBuilder();
try {
// http post
HttpClient httpclient = new DefaultHttpClient();
HttpGet httppost = new HttpGet(
"http://192.168.2.245/getProducts.php");
HttpResponse response = httpclient.execute(httppost);
if (response.getStatusLine().getStatusCode() != 200) {
Log.d("MyApp", "Server encountered an error");
}
BufferedReader reader = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent(), "UTF8"));
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
result = sb.toString();
Log.d("test", result);
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
return result;
}
#Override
protected void onPostExecute(String result) {
try {
JSONArray jArray = new JSONArray(result);
JSONObject json_data;
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
t = json_data.getString("name");
target.onResultGet(t);
}
} catch (JSONException e1) {
e1.printStackTrace();
} catch (ParseException e1) {
e1.printStackTrace();
}
super.onPostExecute(result);
}
protected void onPreExecute() {
super.onPreExecute();
ProgressDialog pd = new ProgressDialog(MainActivity.this);
pd.setTitle("Please wait");
pd.setMessage("Authenticating..");
pd.show();
}
}
interface ResultListener {
public void onResultGet(String value);
}
}

Shortly before someone posted a solution and it works without any errors but it was deleted. This solution is by this way:
public void onClick(View arg0) {
asyncTask.execute(true);
}
});
}
Then OnPostExecute changed like this:
protected void onPostExecute(String result) {
Intent passValue=new Intent(MainActivity.this, second.class);
try {
JSONArray jArray = new JSONArray(result);
JSONObject json_data;
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
t = json_data.getString("name");
delegate.processFinish(t);
}
passValue.putExtra("veri", t);
startActivity(passValue);
} catch (JSONException e1) {
e1.printStackTrace();
} catch (ParseException e1) {
e1.printStackTrace();
}
super.onPostExecute(result);
}
Lastly in my second activity receive the string by this way:
String receivedVal= getIntent().getExtras().getString("veri");
Log.v(TAG, receivedVal);
Thank you someone who posted this solution shortly before :)

My onItemclick function is not working in text to speech

I am fetching data from database to list view having content and an Button(Text to speech)conversion.In my listview that button is showing properly and the clickable function is also working audio is not coming,the text to speech audio function is not working properly.
Mainactivity.java
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_item);
mDbHelper=new GinfyDbAdapter(MainActivity.this);
mDbHelper.open();
Cursor projectsCursor = mDbHelper.fetchAllProjects();
if(projectsCursor.getCount()>0)
{
fillData(projectsCursor);
Log.i("filling", "...");
}
else
{
new GetDataAsyncTask().execute();
}
//lv1 =(ListView)findViewById(R.id.list);
//lv =(ListView)findViewById(R.id.list);
btnGetSelected = (Button) findViewById(R.id.btnget);
btnGetSelected.setOnClickListener(this);
myFilter = (EditText) findViewById(R.id.myFilter);
}
private class GetDataAsyncTask extends AsyncTask<Void, Void, Void> {
private ProgressDialog Dialog = new ProgressDialog(MainActivity.this);
protected void onPreExecute() {
Dialog.setMessage("Loading.....");
Dialog.show();
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
/*mDbHelper=new GinfyDbAdapter(MainActivity.this); // initialize mDbHelper before.
mDbHelper.open();
Cursor projectsCursor = mDbHelper.fetchAllProjects();
if(projectsCursor.getCount()>0)
{
fillData(projectsCursor);
}*/
for(int i=0; i<ID.size(); i++){
mDbHelper=new GinfyDbAdapter(MainActivity.this);
mDbHelper.open();
mDbHelper.saveCategoryRecord(new Category(ID.get(i),TITLE.get(i),CONTENT.get(i),COUNT.get(i)));
}
Dialog.dismiss();
}
#Override
protected Void doInBackground(Void... params) {
getData();
return null;
}
}
public void getData() {
try
{
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpGet request = new HttpGet("http://192.168.1.18:3000/api/v1/posts.json");
// HttpGet request = new HttpGet("http://gdata.youtube.com/feeds/api/users/mbbangalore/uploads?v=2&alt=jsonc");
HttpResponse response = httpclient.execute(request);
HttpEntity resEntity = response.getEntity();
String _response=EntityUtils.toString(resEntity); // content will be consume only once
Log.i("................",_response);
httpclient.getConnectionManager().shutdown();
JSONObject jsonObject = new JSONObject(_response);
JSONArray contacts = jsonObject.getJSONArray("post");//(url);
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("id");
String title = c.getString("title");
String content = c.getString("content");
String count = c.getString("count");
ID.add(id);
TITLE.add(title);
CONTENT.add(content);
COUNT.add(count);
}
} catch (Exception e) {
e.printStackTrace();
}
}
#SuppressLint("NewApi")
#SuppressWarnings("deprecation")
private void fillData(Cursor projectsCursor) {
//mDbHelper.open();
if(projectsCursor!=null)
{
String[] from = new String[]{GinfyDbAdapter.CATEGORY_COLUMN_TITLE, GinfyDbAdapter.CATEGORY_COLUMN_CONTENT, GinfyDbAdapter.CATEGORY_COLUMN_COUNT};
int[] to = new int[]{R.id.text2, R.id.text1, R.id.count};
dataAdapter = new SimpleCursorAdapter(
this, R.layout.activity_row,
projectsCursor,
from,
to,
0);
setListAdapter(dataAdapter);
tts = new TextToSpeech(this, this);
final ListView lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View arg1, int position, long id) {
if(arg1.getId()== R.id.btnaudioprayer && arg1.isClickable() ){
btnaudioprayer = (ImageButton) findViewById(R.id.btnaudioprayer);
txtText = (EditText) findViewById(R.id.text1);
Toast.makeText(MainActivity.this,txtText .getText().toString(),Toast.LENGTH_SHORT).show();
speakOut();
}
}
});
}else
{
Log.i("...........","null");
}
}
#Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit1(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else {
btnaudioprayer.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Initilization Failed!");
}
}
private void speakOut() {
String text = txtText.getText().toString();
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
I followed this link for text to speech http://www.androidhive.info/2012/01/android-text-to-speech-tutorial/ i download the source code its working nice,while using that code in my listview,that function is not working properly.

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