Develop Reference

Saving file to storage programmatically

I have tried with the following code: (Previously it was working fine, Now I am testing its not working may be due to android 10 or some other error).
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.WindowManager;
public class AboutUs extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about_us);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
new DownloadFile().execute("https://4.img-dpreview.com/files/p/E~TS590x0~articles/3925134721/0266554465.jpeg");
}
private class DownloadFile extends AsyncTask<String,Integer, String> {
private PowerManager.WakeLock mWakeLock;
#Override
protected String doInBackground(String... strings) {
String fileUrl = strings[0];
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File folder = new File(extStorageDirectory, "MyFolder");
folder.mkdir();
File pdfFile = new File(folder, fileUrl);
try{
pdfFile.createNewFile();
}catch (IOException e){
e.printStackTrace();
}
FileDownloader.downloadFile(fileUrl, pdfFile);
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
getClass().getName());
mWakeLock.acquire();
mProgressDialog.show();
}
#Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
// if we get here, length is known, now set indeterminate to false
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgress(progress[0]);
}
#Override
protected void onPostExecute(String result) {
mWakeLock.release();
mProgressDialog.dismiss();
if (result != null)
Toast.makeText(context,"Download error: "+result, Toast.LENGTH_LONG).show();
else {
Toast.makeText(context, "File downloaded", Toast.LENGTH_SHORT).show();
activity.startActivity(activity.getIntent());
activity.finish();
}
}
}
public static class FileDownloader {
private static final int MEGABYTE = 1024 * 1024;
public static void downloadFile(String fileUrl, File directory){
try {
URL url = new URL(fileUrl);
HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
FileOutputStream fileOutputStream = new FileOutputStream(directory);
int totalSize = urlConnection.getContentLength();
byte[] buffer = new byte[MEGABYTE];
int bufferLength = 0;
while((bufferLength = inputStream.read(buffer))>0 ){
fileOutputStream.write(buffer, 0, bufferLength);
}
fileOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
I have tried with the above code.
I have added WRITE_INTERNAL_STORAGE and also ask run time permission

There were major changes on how files can be accessed on Android 10
See https://developer.android.com/training/data-storage
You need to use MediaStore or Storage Access Framework (SAF), details https://developer.android.com/training/data-storage/shared for files outside of your App's private directories.
As you are storing photo then MediaStore would be the way to access pictures https://developer.android.com/training/data-storage/shared/media
Though as a quick fix is to temporarily opt out https://developer.android.com/training/data-storage/compatibility but this will only work until Android 11
Some better examples at https://proandroiddev.com/working-with-scoped-storage-8a7e7cafea3

Android 10 requered android:requestLegacyExternalStorage="true" in your AndroidManifest file
check this link
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.xxx.xxxx">
<application
android:requestLegacyExternalStorage="true">
</application>
</manifest>

HttpURLConnection problem in Android Studio while loading an image from internet

I'm trying to download the image from URL: "http://upload.wikimedia.org/wikipedia/en/a/aa/Bart_Simpson_200px.png
and after that I want to display it in image view. but continuously the error in HttpURLConnection is occurring
On clicking of a button(download function is called) it should remove the previous image and load the new image from the url
I have tried using internet on emulator and its working fine. emulator and my pc is connected to internet. I have also asked permissions in AndroidMenifest. but nothing is solving the problem.
package com.example.web;
import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.ExecutionException;
public class MainActivity extends AppCompatActivity {
ImageView imageView;
public class ImageDownloader extends AsyncTask<String,Void, Bitmap> {
#Override
protected Bitmap doInBackground(String... strings) {
try {
URL url = new URL(strings[0]);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
httpURLConnection.connect();
InputStream inputStream = httpURLConnection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
} catch (IOException e) {
e.printStackTrace();
Log.i("Error","Error encountered");
}
return null;
}
}
public void download(View view) {
imageView = findViewById(R.id.imageView3);
imageView.setImageResource(0);
ImageDownloader imageDownloader = new ImageDownloader();
try {
Bitmap bitmap = imageDownloader.execute("http://upload.wikimedia.org/wikipedia/en/a/aa/Bart_Simpson_200px.png").get();
imageView.setImageBitmap(bitmap);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
Permissions in AndroidMenifiest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

As Per Your Code I write Down New One just Replace it With Existing One
public class MainActivity extends AppCompatActivity {
ImageView imageView;
public class ImageDownloader extends AsyncTask<String,Void, Bitmap> {
OutputStream output;
#Override
protected Bitmap doInBackground(String... strings) {
int count;
Long tsLong = System.currentTimeMillis() / 1000;
String ts = tsLong.toString();
try {
URL url = new URL(strings[0]);
URLConnection conection = url.openConnection();
conection.connect();
int lenghtOfFile = conection.getContentLength();
// download the file
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream
output = new FileOutputStream(Environment
.getExternalStorageDirectory().toString()
+ "DownloadedFile" + ts + ".jpg");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
int cur = (int) ((total * 100) / lenghtOfFile);
if (Math.min(cur, 100) > 98) {
try {
// Sleep for 5 seconds
Thread.sleep(500);
} catch (InterruptedException e) {
Log.d("Failure", "sleeping failure");
}
}
Log.i("currentProgress", "currentProgress: " + Math.min(cur, 100) + "\n " + cur);
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
public void download(View view) {
imageView = findViewById(R.id.imageView3);
imageView.setImageResource(0);
ImageDownloader imageDownloader = new ImageDownloader();
try {
Bitmap bitmap = imageDownloader.execute("http://upload.wikimedia.org/wikipedia/en/a/aa/Bart_Simpson_200px.png").get();
imageView.setImageBitmap(bitmap);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

If you want to download Image and store in Your Local Storage then Use Below Code.
Here I create One DownloadFileFromURL.class File which is my AsyncTask So downloading processed Without Interruption.
public DownloadFileFromURL(Context context) {
this.context = context;
}
protected void onPreExecute() {
super.onPreExecute();
Log.e(TAG, "onPreExecute: Download started");
}
#Override
protected String doInBackground(String... f_url) {
int count;
Long tsLong = System.currentTimeMillis() / 1000;
String ts = tsLong.toString();
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
int lenghtOfFile = conection.getContentLength();
// download the file
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream
output = new FileOutputStream(Environment
.getExternalStorageDirectory().toString()
+ "Your Folder Name" + ts + ".jpg");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
int cur = (int) ((total * 100) / lenghtOfFile);
if (Math.min(cur, 100) > 98) {
try {
// Sleep for 5 seconds
Thread.sleep(500);
} catch (InterruptedException e) {
Log.d("Failure", "sleeping failure");
}
}
Log.i("currentProgress", "currentProgress: " + Math.min(cur, 100) + "\n " + cur);
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
Now Call Above File in Your Activity or When You want. At the time of Calling this AsyncTask pass Your URLto download images.
new DownloadFileFromURL(context).execute("Your Download URL");

Typeface.createFromFile file not found?

Before that I post question and get solution too.But Data stored in data/data/com.customfonts/Robotoo.ttf but its searching file in wrong path and throwing Font not found /data/user/0/com.customfonts/files/Robottoo.ttf
Downloading file from url error " java.io.FileNotFoundException: /Users/Documents (No such file or directory)" but I facing file not found exception.Here this my code I have tried.
// Storing file
private class DownloadingTask extends AsyncTask<Void,Void,Void>{
#Override
protected Void doInBackground(Void... voids) {
try {
URL url = new URL(fonturl);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.connect();
FileOutputStream fos = new FileOutputStream(new File(getFilesDir(),"Robotto.ttf"));
Log.i("Download","complete");
Log.i("File",getFilesDir().getAbsolutePath());
( I/File: /data/user/0/com.customfonts/files)//files stores under
Log.i("FOS",""+fos.toString());
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
}
catch (Exception e) {
e.printStackTrace();
outputFile = null;
Log.e("Error", "Download Error Exception " + e.getMessage());
}
return null;
}
}
btnGETDATA.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String filename="Robottoo.ttf";
getTypeface(filename);
}
});
private Typeface getTypeface(String filename)
{
Typeface font;
try
{
font = Typeface.createFromFile(getFilesDir().getAbsolutePath() +"/"+filename);
Log.i("FOnt found",""+font);
(java.lang.RuntimeException: Font not found /data/user/0/com.customfonts/files/Robotoo.ttf)
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
return font;
}
java.lang.RuntimeException: Font not found /data/user/0/com.customfonts/files/Robottoo.ttf

Try to use getExternalFilesDir() method insted of getFilesDir()
getExternalFilesDir method give you the path of your app private folder directory where you store your ttf file for more info check this out.
File file = new File(context.getExternalFilesDir(Environment.DIRECTORY_PICTURES),filename);
if (!file.mkdirs()) {
Log.e(LOG_TAG, "Directory not created");
}
font = Typeface.createFromFile(file.getPath());
Other Way - Try This ContextWrapper.getFilesDir() check

you can try this way,
1. check directory is exist or not if not then create directory
File rootDirectory;
PackageManager m = getPackageManager();
String s = getPackageName();
PackageInfo p = null;
try {
p = m.getPackageInfo(s, 0);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
s = p.applicationInfo.dataDir;
rootDirectory = new File(s + "/files");
if (!rootDirectory.exists()) {
rootDirectory.mkdir();
}
String FileName = "Robotto.ttf";
String finalUrl = rootDirectory.getAbsolutePath() + "/" + FileName;
2. Some changes in your code
private class DownloadingTask extends AsyncTask<Void,Void,Void> {
#Override
protected Void doInBackground(Void... voids) {
try {
File rootDirectory = null;
URL url = new URL(fonturl);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.connect();
FileOutputStream fos = new FileOutputStream(finalUrl);
// Log.i("Download","complete");
// Log.i("File",getFilesDir().getAbsolutePath());
// ( I/File: /data/user/0/com.customfonts/files)//files stores under
// Log.i("FOS",""+fos.toString());
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
}
catch (Exception e) {
e.printStackTrace();
outputFile = null;
Log.e("Error", "Download Error Exception " + e.getMessage());
}
return null;
}
}
btnGETDATA.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// String filename="Robottoo.ttf";
getTypeface(finalUrl);
}
});
private Typeface getTypeface(String finalUrl)
{
Typeface font;
try
{
font = Typeface.createFromFile(finalUrl);
// Log.i("FOnt found",""+font);
// (java.lang.RuntimeException: Font not found /data/user/0/com.customfonts/files/Robotoo.ttf)
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
return font;
}
I hope this will help you.
Update 1:
Once check your file name "Robotto.ttf" this is different name.
btnGETDATA.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String filename="Robottoo.ttf";
getTypeface(filename);
}
});
you should use
btnGETDATA.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String filename="Robotto.ttf";
getTypeface(filename);
}
});
Update 2:
check your application having "WRITE_EXTERNAL_STORAGE" permission.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
for more details, you can go threw Write a file in external storage in Android
Update 3: (just copy and paste code this is working)
1. WriteSDCard.java
import android.Manifest;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class WriteSDCard extends AppCompatActivity {
String finalUrl;
private TextView tv;
private String fonturl= "http://github.com/google/fonts/blob/master/apache/roboto/Roboto-Regular.ttf?raw=true";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(isStoragePermissionGranted()){
checkExternalMedia();
writeToFile();
new DownloadingTask().execute();
}
}
private void checkExternalMedia(){
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// Can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// Can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
// Can't read or write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
tv.append("\n\nExternal Media: readable="
+mExternalStorageAvailable+" writable="+mExternalStorageWriteable);
}
private void writeToFile(){
File rootDirectory;
PackageManager m = getPackageManager();
String s = getPackageName();
PackageInfo p = null;
try {
p = m.getPackageInfo(s, 0);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
s = p.applicationInfo.dataDir;
rootDirectory = new File(s + "/files");
if (!rootDirectory.exists()) {
rootDirectory.mkdir();
}
String FileName = "Roboto-Regular.ttf";
finalUrl= rootDirectory.getAbsolutePath() + "/" + FileName;
}
private class DownloadingTask extends AsyncTask<Void,Void,Void> {
#Override
protected Void doInBackground(Void... voids) {
try {
URL url = new URL(fonturl);
HttpURLConnection c = (HttpURLConnection)url.openConnection();
c.setRequestMethod("GET");
c.connect();
FileOutputStream fos = new FileOutputStream(finalUrl); // File you want to save to, It creates Roboto-Regular.ttf in your Internal Storage you got from "getFilesDir() method
Log.i("Download","complete");
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
}
catch (Exception e) {
e.printStackTrace();
// outputFile = null;
Log.e("Error", "Download Error Exception " + e.getMessage());
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
// super.onPostExecute(aVoid);
File file = new File(finalUrl);
if(file.exists()) {
//something,
Toast.makeText(WriteSDCard.this,"File exists",Toast.LENGTH_SHORT).show();
/**
*
*/
getTypeface();
}
else{
//something
Toast.makeText(WriteSDCard.this,"File Not exists",Toast.LENGTH_SHORT).show();
}
}
}
private Typeface getTypeface()
{
Typeface font;
try
{
font = Typeface.createFromFile(finalUrl);
Log.i("Font found",""+font);
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
return font;
}
public boolean isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
// Log.v(TAG,"Permission is granted");
return true;
} else {
// Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
}
else { //permission is automatically granted on sdk<23 upon installation
// Log.v(TAG,"Permission is granted");
return true;
}
}
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
// Log.v(TAG,"Permission: "+permissions[0]+ "was "+grantResults[0]);
//resume tasks needing this permission
}
}
}
2. Manifest File
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="example.download_fontform_url">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".WriteSDCard">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

create assets folder in app level hierarchy and paste your .ttf font file inside it.
and use this code to apply font
Typeface face = Typeface.createFromAsset(getAssets(), "font.ttf");
textview.setTypeface(face);

Android - Saving a downloaded image from URL onto SD card

I am loading an image from an URL on button click, and storing it as a Bitmap. Now i want to know how to save that downloaded image into sd card as well as in system.
I attempted to do it the following way:
package com.v3.thread.fetchImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class MainThreadActivity extends Activity {
ImageView imView;
EditText ed1;
Bitmap bmImg;
Button bt, btSave;
String imageUrl = "";
int visibilty = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
ed1 = (EditText) findViewById(R.id.edURL);
btSave = (Button) findViewById(R.id.btnSave);
bt = (Button) findViewById(R.id.btnLoad);
bt.setOnClickListener(getImgListener);
imView = (ImageView) findViewById(R.id.imview);
Log.i("img already downloaded", "img");
btSave.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Log.i("img url", "Under Save");
saveImage();
}
});
}
View.OnClickListener getImgListener = new View.OnClickListener() {
public void onClick(View view) {
// TODO Auto-generated method stub
imageUrl = ed1.getText().toString();
if (imageUrl.equals(""))
Toast.makeText(getApplicationContext(), "Enter an URL first", 1000).show();
downloadFile(imageUrl);
Log.i("im url", imageUrl);
btSave.setVisibility(visibilty);
}
};
void downloadFile(String fileUrl) {
URL myFileUrl = null;
try {
myFileUrl = new URL(fileUrl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
Log.i("im connected", "Download");
bmImg = BitmapFactory.decodeStream(is);
imView.setImageBitmap(bmImg);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
void saveImage() {
File filename;
try {
String path = Environment.getExternalStorageDirectory().toString();
Log.i("in save()", "after mkdir");
new File(path + "/mvc/mvc").mkdir();
filename = new File(path + "/mvc/mvc/var3.jpg");
Log.i("in save()", "after file");
FileOutputStream out = new FileOutputStream(filename);
Log.i("in save()", "after outputstream");
bmImg.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
Log.i("in save()", "after outputstream closed");
MediaStore.Images.Media.insertImage(getContentResolver(),
filename.getAbsolutePath(), filename.getName(),
filename.getName());
bt.setText("Saved...");
Toast.makeText(getApplicationContext(),
"File is Saved in " + filename, 1000).show();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Loading of image from URL is working, but when I press the save button to save it, it throws the exception
java.io.FileNotFoundException: /mnt/sdcard/mvc/mvc/var3.image(No such
file or directory)
So how do I save the image to the SD card correctly?

You will need to first create the directories and sub-directories where you want to create the files.
I see that you used the mkdir() method. Try mkdirs(), and it should work.

Add WRITE_EXTERNAL_STORAGE android permission in your Manifest:
Then
BitmapDrawable drawable = (BitmapDrawable) mImageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();
Get to directory (a File object) from SD Card such as:
File sdCardDirectory = Environment.getExternalStorageDirectory();
Create your specific file for image storage:
File image = new File(sdCardDirectory, "download.png");
Then,
boolean success = false;
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
/* 100 to keep full quality of the image */
outStream.flush();
outStream.close();
success = true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (success) {
//Display Downloaded
} else {
// display Error in Downloading
}

Android load an image from url on button click

I want to load an image from url on a button click & to show it on activity imageview.
how to do it?
I try the following code but it shows the system error like java.net.UnknownHostException Host is on resolved.
package com.v3.thread.fetchImage;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import org.apache.http.HttpException;
import org.apache.http.conn.HttpHostConnectException;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainThreadActivity extends Activity {
ImageView img_downloaded;
Button btn_download;
String fileurl = "http://variable3.com/files/images/email-sig.jpg";
Bitmap bmImg;
private ProgressDialog dialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//new MainThreadActivity().onPreExecute();
img_downloaded = (ImageView) findViewById(R.id.imageView1);
btn_download = (Button) findViewById(R.id.btnLoad);
btn_download.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
try {
downloadfile(fileurl);
} catch (HttpHostConnectException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public void AbstractProgressTask() {
dialog = new ProgressDialog(this);
}
protected void onPreExecute() {new MainThreadActivity().onPreExecute();
this.dialog.setMessage("Loading. Please wait...");
this.dialog.show();
}
/**
* method is called after the work is done.
*
* #param success result of #doInBackground method.
*/
protected void onPostExecute(final Boolean success) {
if (dialog.isShowing()) {
dialog.dismiss();
}
}
// automatically done on worker thread (separate from UI thread)
protected Boolean doInBackground(final String... args) {
// here is your code
return true;
}
void downloadfile(String fileurl) throws HttpException,HttpHostConnectException {
URL myFileUrl = null;
try {
myFileUrl = new URL(fileurl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
int length = conn.getContentLength();
if(length>0)
{
int[] bitmapData =new int[length];
byte[] bitmapData2 =new byte[length];
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
//img.setImageBitmap(bmImg);
}
else
{
int[] bitmapData =new int[length];
byte[] bitmapData2 =new byte[length];
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
}
}
catch(IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
please tell me where i hav to change

That seems like a lot of code just to show on an ImageView. Try this instead:
URL url = new URL("http://variable3.com/files/images/email-sig.jpg");
Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
img_downloaded.setImageBitmap(bmp);

Use the following code for that, it will help you
Drawable drawable = LoadImageFromWebOperations(backImgUrl);
bagImgBtn.setBackgroundDrawable(drawable);
private Drawable LoadImageFromWebOperations(String url) {
// TODO Auto-generated method stub
try
{
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
}catch (Exception e) {
if (LogD) {
Log.d(TAG, e.toString());
e.printStackTrace();
}
return null;
}
}

Create a new onClick method called downloadButton.
public void downloadButton(View view){
Log.i("Button Status", "Button Pressed");
downloadImage imagedownload = new downloadImage();
Bitmap image;
try {
image = imagedownload.execute("Paste URL address of an image").get();
imageView.setImageBitmap(image);
}catch (Exception e){
e.printStackTrace();
}
}
Create a class called downloadImage which extends AysncTask.
public class downloadImage extends AsyncTask<String, Void, Bitmap>{
#Override
protected Bitmap doInBackground(String... urls) {
try {
URL url = new URL(urls[0]);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.connect();
InputStream inputStream = httpURLConnection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
}catch (Exception e){
e.printStackTrace();
}
return null;
}
}

Just call the following method on Button Click:
Drawable drawable_from_url(String url, String src_name) throws java.net.MalformedURLException, java.io.IOException
{
return Drawable.createFromStream(((java.io.InputStream)new java.net.URL(url).getContent()), src_name);
}
where url is the url to pass and src_name is any String(say "src")
Hope this will help you

I want to load an image from url on a button click & to show it on activity imageview
You have to do something like below within onPageFinished:
public void onPageFinished (WebView view, String url) {
wv.loadUrl(javascript);
view.getSettings().setLoadsImagesAutomatically(true);
wv.setVisibility(View.VISIBLE);
}