I am trying to get an image from a url stored in a table but when I try to get the image the ImageView doesn't contain anything it is just blank.
In my code below I have used Picasso to get the picture:
public class Imageoffam extends AppCompatActivity {
private boolean success = false; // boolean
private ConnectionClass connectionClass;
public TextView tmtmt;
public ImageView dede;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_imageoffam);
getSupportActionBar().hide();
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
tmtmt = (TextView) findViewById(R.id.tomato) ;
dede = (ImageView) findViewById(R.id.dededede);
connectionClass = new ConnectionClass();
SyncData orderData = new SyncData();
orderData.execute("");
}
private class SyncData extends AsyncTask<String, String, String> {
String msg = "Success";
ProgressDialog progress;
#Override
protected void onPreExecute() {
progress = ProgressDialog.show(Imageoffam.this, "Synchronising",
"Please Wait...", true);
}
#Override
protected String doInBackground(String... strings) {
try {
Connection conn = connectionClass.CONN();
if (conn == null) {
msg = "Please Check Your Connection";
success = false;
} else {
String dta = getIntent().getStringExtra("blala");
String query = "SELECT Images.Fimage,family.FName,family.FInfo,family.CID FROM Images INNER JOIN family ON family.FID = Images.FID WHERE family.FInfo = (N'" +dta+ "')";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
try {
Picasso.with(Imageoffam.this).load(rs.getString("Fimage")).into(dede);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
} catch (Exception e) {
e.printStackTrace();
Writer writer = new StringWriter();
e.printStackTrace(new PrintWriter(writer));
msg = writer.toString();
success = false;
}
return msg;
}
#Override
protected void onPostExecute(String msg) {
progress.dismiss();
Toast.makeText(Imageoffam.this, msg + "", Toast.LENGTH_LONG).show();
if (success == false) {
} else {
try {
} catch (Exception ex) {
}
}
}
}
It doesn't give any error message although it doesn't show the image in the ImageView.
Can someone please tell me what am I doing wrong?
Any help would be appreciated.
if you store image uri in db you need to setting uri on ImageView by
imageView.setImageUri(uri);
after get to uri from db
When using Picasso, no need of AsyncTask, just do:
Picasso.with(context).load(imageUri).into(ivBasicImage);
For example:
String imageUri = "https://i.imgur.com/tGbaZCY.jpg";
ImageView ivBasicImage = (ImageView) findViewById(R.id.ivBasicImage);
Picasso.with(context).load(imageUri).into(ivBasicImage);
You can also try Glide:
Glide.with(context).load(url).into(imageView);
Instead of the picasso method,
I recommend the local webview method.
Related
I am trying to develop an application that reads jokes from a URL. I am using an AsyncTask to read from URL and then put the string to a textView. But I can't figure out why it isn't working.
Here is my code:
public class MainActivity extends AppCompatActivity {
private Button oneJokeBtn, threeJokesBtn;
private final static String ERROR_TAG = "Download Error";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Capturing our buttons from the view
oneJokeBtn = findViewById(R.id.joke_1);
threeJokesBtn = findViewById(R.id.joke_3);
// Register the onClick listener
oneJokeBtn.setOnClickListener(buttonHandler);
threeJokesBtn.setOnClickListener(buttonHandler);
// Declaring the Spinner
Spinner spinner = findViewById(R.id.spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.length_array, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
spinner.setAdapter(adapter);
// Spinner onItemSelector implemented in the OnCreate Method
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (position){
case 0:
Toast.makeText(parent.getContext(), R.string.short_toast, Toast.LENGTH_SHORT).show();
break;
case 1:
Toast.makeText(parent.getContext(), R.string.medium_toast, Toast.LENGTH_SHORT).show();
break;
case 2:
Toast.makeText(parent.getContext(), R.string.long_toast, Toast.LENGTH_SHORT).show();
break;
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
/** AsyncTask that reads one joke directly from the URL and adds it to the textView */
private class Download1JokeAsyncTask extends AsyncTask <Void, Void, String> {
private ProgressDialog progressDialog;
private String mResponse = "";
#Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setMessage(getString(R.string.progress_msg));
progressDialog.setIndeterminate(true);
progressDialog.show();
}
#Override
protected String doInBackground(Void... voids) {
String joke = null;
try {
// Open a connection to the web service
URL url = new URL( "http://www-staff.it.uts.edu.au/~rheise/sarcastic.cgi" );
URLConnection conn = url.openConnection();
// Obtain the input stream
BufferedReader in = new BufferedReader( new InputStreamReader(conn.getInputStream()));
// The joke is a one liner, so just read one line.
joke = in.readLine();
// Close the connection
in.close();
} catch (MalformedURLException e) {
e.printStackTrace();
Log.e(ERROR_TAG, "Exception: ", e);
mResponse = getString(R.string.fail_msg);
} catch (IOException e) {
e.printStackTrace();
Log.e(ERROR_TAG, "Exception: ", e);
mResponse = getString(R.string.fail_msg);
}
return joke;
}
#Override
protected void onPostExecute(String joke) {
TextView tv = findViewById(R.id.tv_joke);
if (joke == null) {
tv.setText(R.string.fail_msg);
}
else {
tv.setText(joke);
}
if (progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
}
/** AsyncTask that reads three jokes directly from the URL and adds it to the textView */
private class Download3JokeAsyncTask extends AsyncTask<Void, Integer, String[]> {
private ProgressDialog mProgressDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.setProgress(0);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setCancelable(true);
mProgressDialog.setMessage(getString(R.string.three_jokes_btn));
mProgressDialog.show();
}
#Override
protected String[] doInBackground(Void... voids) {
int count = 2;
for (int i = 0; i < 2; i++){
try {
URL url = new URL("http://www.oracle.com/");
URLConnection conn = url.openConnection();
// Obtain the input stream
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
// The joke is a one liner, so just read one line.
String joke;
while ((joke = in.readLine()) != null) {
System.out.println(joke);
}
// Close the connection
in.close();
} catch (MalformedURLException e) {
e.printStackTrace();
Log.e(ERROR_TAG, "Exception: ", e);
} catch (IOException e) {
e.printStackTrace();
Log.e(ERROR_TAG, "Exception: ", e);
}
publishProgress((int) ((i / (float) count) * 100));
}
return null;
}
#Override
protected void onProgressUpdate(Integer... values) {
setProgress(0);
}
#Override
protected void onPostExecute(String[] strings) {
super.onPostExecute(strings);
}
}
/** onClickListener that gets the id of the button pressed and download jokes accordingly */
OnClickListener buttonHandler = new OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.joke_1:
new Download1JokeAsyncTask().execute();
break;
case R.id.joke_3:
new Download3JokeAsyncTask().execute();
break;
}
}
};
The AsyncTask is called Download1JokeAsyncTask, it is supposed to read from URL and then put it into a text view. and I've put an error message to appear in the text view if the joke (the string where the joke is stored) is null.
And always the text view says that it failed to download a message.
Please help.
I went to your joke page and inspecting the source (in Firefox) and I found this:
<html>
<head>
<link rel="alternate stylesheet" type="text/css" href="resource://content-accessible/plaintext.css" title="Wrap Long Lines">
</head>
<body>
<pre>I'm really good at stuff until people watch me do that stuff.</pre>
</body>
</html>
So you could save the whole output as a String and then use this:
string.substring(string.indexOf("<pre>"), string.indexOf("</pre>");
string.substring(4);
Basically you are downloading only the first line of the page which would be the content declaration.
Instead you need to download the sixth line and remove the pre tags.
Good Luck!
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();
I am not able to find any appropriate solution for below issue. I am using AsyncTask app sends request to server and it returns the JSON array as response, in postExecute method I parsed it, and problem is when I try to set the parsed data to TextView, textview not showing data. I am sure that server returned some data, and this data was parsed in postExecute and saved in global variables. TextViews also was declared as global variables, and defined in OnCreate method. thanks in advance!
Please check Code mentioned below:
public class CompanyData extends AppCompatActivity implements View.OnClickListener {
Button cComments;
String ssid,bin;
String extra, extra1;
TextView compData1, compData2, compData3, compData4, compData5, compData6, compTitle;
String title, kod_okpo, address, reg_date, fio, kod_oked, ovd ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_company_data);
cComments = (Button) findViewById(R.id.cComment);
cComments.setOnClickListener(this);
Bundle extras = getIntent().getExtras();
if (extras != null) {
extra = extras.getString("bin");
extra1 = extras.getString("ssid");
send_company_req(extra1, extra);
}
compTitle = (TextView) findViewById(R.id.companyTitle);
compData1 = (TextView) findViewById(R.id.compData1);
compData2 = (TextView) findViewById(R.id.compData2);
compData3 = (TextView) findViewById(R.id.compData3);
compData4 = (TextView) findViewById(R.id.compData4);
compData5 = (TextView) findViewById(R.id.compData5);
compData6 = (TextView) findViewById(R.id.compData6);
//Toast.makeText(this,"LOOOL" + title+bin+kod_okpo+address+reg_date+fio+kod_oked+ovd, Toast.LENGTH_SHORT).show();
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.cComment:
Intent companyData = new Intent(CompanyData.this, Comments.class);
companyData.putExtra("bin", bin);
companyData.putExtra("ssid", ssid);
startActivity(companyData);
startActivity(new Intent(this, Comments.class));
break;
}
}
private void send_company_req(final String ssid, final String searchData) {
class GetJSON extends AsyncTask<String, String, String> {
ProgressDialog loading;
String rStr;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(CompanyData.this, "Request...", null, true, true);
}
#Override
protected String doInBackground(String... params) {
String token = params[0];
String fi = params[1];
String uri = Quickstart.URL + "/car/info";
String param = null;
try {
param = "ssid=" + URLEncoder.encode(token, "UTF-8") +
"&bin=" + URLEncoder.encode(fi, "UTF-8") + "&dev=android";
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
try {
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true);
con.setRequestMethod("POST");
con.setFixedLengthStreamingMode(param.getBytes().length);
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("Authorization", "Bearer " + token);
PrintWriter out = new PrintWriter(con.getOutputStream());
out.print(param);
out.close();
String response = "";
Scanner inStream = new Scanner(con.getInputStream());
while (inStream.hasNextLine()) {
response += (inStream.nextLine());
}
return response;
} catch (Exception e) {
return null;
}
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
//Toast.makeText(CompanyData.this, s, Toast.LENGTH_LONG).show();
JSONArray jsonArrayComp;
try {
jsonArrayComp = new JSONArray(s.trim());
JSONObject jsonObjectComp = jsonArrayComp.getJSONObject(0);
try {
title = jsonObjectComp.getString("title");
kod_okpo = jsonObjectComp.getString("kod_okpo");
address = jsonObjectComp.getString("address");
reg_date = jsonObjectComp.getString("reg_date");
fio = jsonObjectComp.getString("fio");
kod_oked = jsonObjectComp.getString("kod_1_oked");
ovd = jsonObjectComp.getString("vidd");
Toast.makeText(CompanyData.this,"LOOOL" + title+bin+kod_okpo+address+reg_date+fio+kod_oked+ovd, Toast.LENGTH_LONG).show();
} catch (Exception ee) {
}
} catch (Exception e) {
//Toast.makeText(CompanyData.this, "Упс,:( что то пошло не так, попробуйте еще раз пожалуйста.", Toast.LENGTH_SHORT).show();
}
compTitle.setText(title);
compData1.setText(bin);
compData2.setText(kod_okpo);
compData3.setText(address);
compData4.setText(reg_date);
compData5.setText(fio);
compData6.setText(kod_oked + " - " + ovd);
}
}
GetJSON gj = new GetJSON();
gj.execute(ssid, searchData);
}
}
This is my first time with getting APIS to return the result JSON object. I think I have got the async task code right but I just don't know how to execute it. This is my class code.
For my layout all I have is one button with an onClick () method gg, a progress bar and one text view.
This is the async task:
public class MainActivity extends Activity
{
ProgressBar progressBar;
TextView responseView;
EditText emailText;
String URL;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
responseView = (TextView) findViewById(R.id.responseView);
emailText = (EditText) findViewById(R.id.emailText);
URL = "https://kgsearch.googleapis.com/v1/entities:search?query=taylor+swift&key=APIKEY&limit=1&indent=True";
}
public void gg(View v)
{
new RetrieveFeedTask.execute();
}
private class RetrieveFeedTask extends AsyncTask<Void, Void, String> {
private Exception exception;
protected void onPreExecute() {
progressBar.setVisibility(View.VISIBLE);
responseView.setText("");
Toast.makeText(MainActivity.this, "pre execute", Toast.LENGTH_LONG).show();
}
protected String doInBackground(Void... urls) {
String email = emailText.getText().toString();
// Do some validation here
try {
URL url = new URL(URL);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
return stringBuilder.toString();
}
finally{
urlConnection.disconnect();
}
}
catch(Exception e) {
Log.e("ERROR", e.getMessage(), e);
return null;
}
}
protected void onPostExecute(String response) {
if(response == null) {
response = "THERE WAS AN ERROR";
Toast.makeText(MainActivity.this, "post execute", Toast.LENGTH_LONG).show();
}
progressBar.setVisibility(View.GONE);
Log.i("INFO", response);
responseView.setText(response);
}
}
}
So in the public void gg(View v)
I call the .execute method but it gives me an error
Unknown type execute
Do I have to add some params to the execute method?
If so what?
Thanks.
Try
new RetrieveFeedTask().execute();
Ok, I have a custom view which plays gifs from the internet. Therefor I need to add an url to my view to download the gif. But I can't seem to update my custom view inside my asynctask. I need to add an url string to my custom view gifView.setUrl(). It works in the onCreate Class but it gives me null in asynctask.
Oncreate class
GifView gifView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
id = extras.getInt("id");
String idStr = String.valueOf(id);
String extension = extras.getString("extension");
if(extension.equals(".gif")){
setContentView(R.layout.activity_post_gif);
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
gifView = (GifView)findViewById(R.id.gifview);
titleStr = (TextView)findViewById(R.id.titleTXT);
postInfo = (TextView)findViewById(R.id.infoTXT);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
//the url
new getJsonInfoGif().execute("http://www.website.com/jsonApi");
}else{
Asynctask
public class getJsonInfoGif extends AsyncTask<String, Void, String>{
#Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(context);
progressDialog.setMessage("loading post...");
progressDialog.show();
}
#Override
protected String doInBackground(String... strings) {
return GET(strings[0]);
}
#Override
protected void onPostExecute(String res) {
try {
JSONObject jsonObject = new JSONObject("{'postinfo':[" + res + "]}");
JSONArray jsonArray = jsonObject.getJSONArray("postinfo");
JSONObject obj = jsonArray.getJSONObject(0);
//post title
titleStr.setText(obj.getString("name"));
//category and maker full name
//large image
JSONObject imgObj = obj.getJSONObject("thumbnails");
gifView.setUrl("http://www.website.com/my.gif");
} catch (JSONException e) {
e.printStackTrace();
}
if (progressDialog != null) {
progressDialog.dismiss();
}
}
}
GifView.java
public void setUrl(String urlStr){
this.urlStr = urlStr;
invalidate();
requestLayout();
}
public String getUrl(){
return this.urlStr;
}
public void init(final Context context)throws IOException{
setFocusable(true);
movie = null;
movieWidth = 0;
movieHeight = 0;
movieDuration = 0;
final Thread thread = new Thread(new Runnable() {
#Override
public void run(){
try{
Log.d("DEBUG", "URL" + urlStr);
URL url = new URL(urlStr);
try {
HttpURLConnection http = (HttpURLConnection) url.openConnection();
inputStream = http.getInputStream();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
movie = Movie.decodeStream(inputStream);
movieWidth = movie.width();
movieHeight = movie.height();
movieDuration = movie.duration();
((PostActivity) context).runOnUiThread(new Runnable() {
#Override
public void run() {
invalidate();
requestLayout();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}catch (Exception e){
e.printStackTrace();
}
}
});
thread.start();
}
Here is the Log from the url, it gives me null if I add the url inside my asynctask in Activity.
11-07 14:41:58.821 5674-6076/svenmobile.tools.showcase D/DEBUG﹕ URLnull
What I want to know is what the problem is and how to solve it if possible.
Thanks in advance, Sven
Maybe you called init() before setUrl().
You can pass it the url in the contructor, or public void init(final Context context, String urlStr)throws IOException{
I also suggest you to move all that network code to doInBackground