On the site http://218.93.33.59:85/map/zjmap/ibikegif.asp?flag=2&id=9, we can get a gif image named ibikegif.gif. However I can't display it on my android phone. My code like this:
/**
*#param url the imageURL.it references to
*"http://218.93.33.59:85/map/zjmap/ibikegif.asp?flag=2&id=9" here
*
**/
public Bitmap returnBitMap(String url) {
URL myFileUrl = null;
Bitmap bitmap = null;
try {
myFileUrl = new URL(url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bitmap = BitmapFactory.decodeStream(is); //Attention：bitmap is null
is.close();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
Could you help me?
I have tested this code and it works. It's basically what you did with one difference, i have also set request method explicitly to GET.
public class MyActivity extends Activity {
private ImageView imageView;
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView = (ImageView) findViewById(R.id.imageView);
}
#Override
protected void onResume() {
super.onResume();
new AsyncTask<Void, Void, Void>() {
Bitmap bitmap;
#Override
protected Void doInBackground(Void... params) {
try{
bitmap = returnBitMap("http://218.93.33.59:85/map/zjmap/ibikegif.asp?flag=2&id=9");
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
imageView.setImageBitmap(bitmap);
imageView.invalidate();
}
}.execute();
}
public Bitmap returnBitMap(String url) throws IOException {
URL myFileUrl = null;
Bitmap bitmap = null;
InputStream is = null;
try {
myFileUrl = new URL(url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setDoInput(true);
conn.setRequestMethod("GET");
conn.connect();
is = conn.getInputStream();
bitmap = BitmapFactory.decodeStream(is);
is.close();
} catch (IOException e) {
e.printStackTrace();
}
if(is != null) {
is.close();
}
return bitmap;
}
}
Related
I used several different methods for downloading image from a web server , display it in image view. I am facing the same problem the image is being shown as blank in the imageview after downloading. I am not getting where i am wrong. I am using emulator.
this is my code for downloading images
private static InputStream OpenHttpConnection(String urlString)
throws IOException
{
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try{
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
}
catch (Exception ex)
{
throw new IOException("Error connecting");
}
return in;
}
static Bitmap DownloadImage(String URL)
{
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return bitmap;
}
This is my code for displaying image
private class LongOperation extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
// perform long running operation operation
Bitmap message_bitmap = null;
// Should we download the image?
if ((image_url != null) && (!image_url.equals("")))
{
message_bitmap =
ImageDownloader.DownloadImage(image_url);
}
// If we didn't get the image, we're out of here
if (message_bitmap == null) {
Log.d("Image", "Null hai");
}
return null;
}
#Override
protected void onPostExecute(String result) {
// execution of result of Long time consuming operation
pDialog.dismiss();
iv.setImageDrawable(message_bitmap);
Log.d("Image", "Displayed");
}
/* (non-Javadoc)
* #see android.os.AsyncTask#onPreExecute()
*/
#Override
protected void onPreExecute() {
// Things to be done before execution of long running operation.
pDialog = new ProgressDialog(CommonUtilities.this);
pDialog.setMessage(Html.fromHtml("Please Wait..."));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
}
I used this code for loading img form url
ImageView v_thumburl = (ImageView) rowView
.findViewById(R.id.v_thumb_url);
thumburl = temp.getString(temp.getColumnIndex("thumburl"));
Drawable drawable = LoadImageFromWebOperations(thumburl);
v_thumburl.setImageDrawable(drawable);
private Drawable LoadImageFromWebOperations(String url) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
} catch (Exception e) {
System.out.println("Exc=" + e);
return null;
}
}
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Android image view from url
I am trying to fetch the image from url and load in imageView, but I cannot encode the url string, please let me know how to encode this.
Please find the code & url used for your reference.
URL: http://images.pcmac.org/SiSFiles/Schools/TN/JacksonMadisonCounty/RoseHillMiddle/Uploads/Locations/%7BB690E93E-F7C9-48AF-B72A-BFF944FA6D4A%7D_104_9169.JPG
Code
String link=URLEncoder.encode(urlStr);
bitmap=loadBitmap(link);
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
try {
InputStream in = new java.net.URL(url).openStream();
bitmap = BitmapFactory.decodeStream(in);
} catch (Exception e) {
}
return bitmap;
}
Use this Code it will fetch the image from server
String URL = "http://images.pcmac.org/SiSFiles/Schools/TN/JacksonMadisonCounty/RoseHillMiddle/Uploads/Locations/%7BB690E93E-F7C9-48AF-B72A-BFF944FA6D4A%7D_104_9169.JPG";
private InputStream OpenHttpConnection(String urlString) throws IOException {
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try {
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
} catch (Exception ex) {
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL) {
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
final String msg = e1.getMessage();
handler.post(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "" + msg, Toast.LENGTH_SHORT).show();
}
});
}
return bitmap;
}
FYI, URLEncoder.encode(String) has been deprecated.
Reference:
http://developer.android.com/reference/java/net/URLEncoder.html
You can encode the url as below:
String URL = "http://images.pcmac.org/SiSFiles/Schools/TN/JacksonMadisonCounty/RoseHillMiddle/Uploads/Locations/%7BB690E93E-F7C9-48AF-B72A-BFF944FA6D4A%7D_104_9169.JPG";
String encodeUrl=URLEncoder.encode(URL, "utf-8");
private Bitmap DownloadImage(String URL) {
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
final String msg = e1.getMessage();
handler.post(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "" + msg, Toast.LENGTH_SHORT).show();
}
});
}
return bitmap;
}
I have create example for How to display image from URL. Use that example it works for me and i also check it by replace you image url.
Please Use below code for download and display image into imageview.
public class MainActivity extends Activity {
ImageView my_img;
Bitmap mybitmap;
ProgressDialog pd;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView mImgView1 = (ImageView) findViewById(R.id.mImgView1);
DownloadImageFromURL mDisImgFromUrl = new DownloadImageFromURL(mImgView1);
mDisImgFromUrl.execute("http://images.pcmac.org/SiSFiles/Schools/TN/JacksonMadisonCounty/RoseHillMiddle/Uploads/Locations/%7BB690E93E-F7C9-48AF-B72A-BFF944FA6D4A%7D_104_9169.JPG");
}
private class DownloadImageFromURL extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Loading...");
pd.show();
}
public DownloadImageFromURL(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);
pd.dismiss();
}
}
}
I have a set of buttons and i want them to be visible only when the image is loaded..and the progressbar to hide,how can i do that..whenever use onPreExecute() or write
buttonname.setVisibility(View.VISIBLE);
in post execute it stops loading the image..Here is what i am using..please help me out i am stuck
public class Main extends Activity{
ImageView image,next,back;
Button a;
static int fullWidth;
static int fullHeight;
ProgressBar progressbar;
Button setWallpaper;
private class BackgroundTask extends AsyncTask <String, Void, Bitmap> {
protected Bitmap doInBackground(String...url) {
//--- download an image ---
Bitmap bitmap = DownloadImage(url[0]);
return bitmap;
}
protected void onPostExecute(Bitmap bitmap) {
ImageView image = (ImageView) findViewById(R.id.imageView1);
bitmaptwo=bitmap;
image.setImageBitmap(bitmap);
image.setScaleType(ScaleType.FIT_CENTER);
}
}
private InputStream OpenHttpConnection(String urlString)
throws IOException
{InputStream in = null;
int response= -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection ))
throw new IOException("Not an HTTP connection");
try{
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK){
in = httpConn.getInputStream();
}
}
catch (Exception ex)
{
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL)
{
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
}
catch (IOException e1){
Toast.makeText(this,e1.getLocalizedMessage(),
Toast.LENGTH_LONG).show();
e1.printStackTrace();
}
return bitmap;
}
public static Bitmap bitmaptwo;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
try
{
new BackgroundTask().execute("http://meluha.in/wp-content/uploads/1.jpg");
}
catch(Exception e)
{
e.printStackTrace();
}
setWallpaper = (Button) findViewById(R.id.abcd);
ImageView next = (ImageView) findViewById(R.id.next);
ImageView back = (ImageView) findViewById(R.id.back);
setWallpaper.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
WallpaperManager wManager;
try {
// Bitmap bitmap = ((BitmapDrawable)imageView1.getDrawable()).getBitmap();
wManager = WallpaperManager.getInstance(getApplicationContext());
fullWidth = wManager.getDesiredMinimumWidth();
fullHeight = wManager.getDesiredMinimumHeight();
Bitmap bitmapResized = Bitmap.createScaledBitmap(bitmaptwo, fullWidth, fullHeight,true);
wManager.setBitmap(bitmapResized);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
Add this code yo your onPostExecute method:
button1.setVisibility(View.VISIBLE);
button2.setVisibility(View.VISIBLE);
//....
progressbar.setVisibility(View.INVISIBLE);
Hi everyone I've check the post on the set wallpaper from URL but I am really new to programing and I still do not undertand it, could someone provide me with an example, basically I have an image on a server and I want to push a button and set it as the phone wallpaper thank you again for the help
public class TestingThree extends Activity {
ImageView image;
private class BackgroundTask extends AsyncTask
<String, Void, Bitmap> {
protected Bitmap doInBackground(String...url) {
//--- download an image ---
Bitmap bitmap = DownloadImage(url[0]);
return bitmap;
}
protected void onPostExecute(Bitmap bitmap) {
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageBitmap(bitmap);
}
}
private InputStream OpenHttpConnection(String urlString)
throws IOException
{InputStream in = null;
int response= -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection ))
throw new IOException("Not an HTTP connection");
try{
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK){
in = httpConn.getInputStream();
}
}
catch (Exception ex)
{
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL)
{
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
}
catch (IOException e1){
Toast.makeText(this,e1.getLocalizedMessage(),
Toast.LENGTH_LONG).show();
e1.printStackTrace();
}
return bitmap;
}
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.wallpaper);
new BackgroundTask().execute("http://myglobaljournal.com/images/imagetest.jpg");
Button setWallpaper = (Button) findViewById(R.id.button3);
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
WallpaperManager wManager;
Bitmap bitmap;
try {
bitmap = BitmapFactory.decodeFile(null);
wManager = WallpaperManager.getInstance(getApplicationContext());
wManager.setBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
am trying to implement it to the button at the bottom where i pull the image from the link and set it directly as a wallpaper
thank you again
try this:
ImageView image;
private class BackgroundTask extends AsyncTask
<String, Void, Bitmap> {
protected Bitmap doInBackground(String...url) {
//--- download an image ---
Bitmap bitmap = DownloadImage(url[0]);
return bitmap;
}
protected void onPostExecute(Bitmap bitmap) {
ImageView image = (ImageView) findViewById(R.id.imageView1);
bitmaptwo=bitmap;
image.setImageBitmap(bitmap);
}
}
private InputStream OpenHttpConnection(String urlString)
throws IOException
{InputStream in = null;
int response= -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection ))
throw new IOException("Not an HTTP connection");
try{
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK){
in = httpConn.getInputStream();
}
}
catch (Exception ex)
{
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL)
{
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
}
catch (IOException e1){
Toast.makeText(this,e1.getLocalizedMessage(),
Toast.LENGTH_LONG).show();
e1.printStackTrace();
}
return bitmap;
}
public Bitmap bitmaptwo;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.wallpaper);
new BackgroundTask().execute("http://myglobaljournal.com/images/imagetest.jpg");
Button setWallpaper = (Button) findViewById(R.id.button3);
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
WallpaperManager wManager;
try {
// bitmap = BitmapFactory.decodeFile(null);
wManager = WallpaperManager.getInstance(getApplicationContext());
wManager.setBitmap(bitmaptwo);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
Required Permission:
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
I am using the following code
public class Img extends Activity {
/** Called when the activity is first created. */
ImageView img;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img = (ImageView)findViewById(R.id.imgview);
Bitmap bm = getBitmapFromURL("http://l.yimg.com/a/i/us/we/52/21.gif");
if(bm == null)
Toast.makeText(this, "Image can't load", 1).show();
else
img.setImageBitmap(bm);
}
public static Bitmap getBitmapFromURL(String src) {
try {
Log.e("src",src);
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
Log.e("Bitmap","returned");
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
Log.e("Exception",e.getMessage());
return null;
}
}
}
I am getting a message "Image can't load"
Please try below code.
ImageView img;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img = (ImageView)findViewById(R.id.imgview);
Drawable image = getBitmapFromURL("http://l.yimg.com/a/i/us/we/52/21.gif");
if(image == null)
Toast.makeText(this, "Image can't load", 1).show();
else
img.setImageDrawable(image);
}
public Drawable getBitmapFromURL(String url) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
} catch (Exception e) {
return null;
}
}
try this..
private Bitmap downloadUrl(String url) {
InputStream myInputStream =null;
Bitmap myBitmap;
StringBuilder sb = new StringBuilder();
//adding some data to send along with the request to the server
sb.append("name=Anthony");
URL url;
try {
url = new URL(url);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
OutputStreamWriter wr = new OutputStreamWriter(conn
.getOutputStream());
// this is were we're adding post data to the request
wr.write(sb.toString());
wr.flush();
myInputStream = conn.getInputStream();
wr.close();
myBitmap = BitmapFactory.decodeStream(myInputStream);
} catch (Exception e) {
//handle the exception !
Log.d(TAG,e.getMessage());
}
return myBitmap;
}