Develop Reference

PDF printing view issue

I have tried in two ways,
1) Am creating a WebView and loading my pdf document, and my application is almost done with its part of the printing process. But in that am facing printing issue.
Its not with full A4 sheet view.Can anyone please help,The following code i have used,
public void createWebPagePrint(WebView webView) {
PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
PrintDocumentAdapter printAdapter = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
printAdapter = webView.createPrintDocumentAdapter();
String jobName = getString(R.string.app_name) + " Document";
PrintAttributes.Builder builder = null;
builder = new PrintAttributes.Builder();
builder.setMediaSize(PrintAttributes.MediaSize.ISO_A4);
PrintJob printJob = null;
printJob = printManager.print(jobName, printAdapter, builder.build());
if (printJob.isCompleted()) {
Toast.makeText(getApplicationContext(), "Print Complete", Toast.LENGTH_LONG).show();
} else if (printJob.isFailed()) {
Toast.makeText(getApplicationContext(), "Print Failed", Toast.LENGTH_LONG).show();
}
builder.setMediaSize(PrintAttributes.MediaSize.ISO_A4)
.setResolution(new PrintAttributes.Resolution("id", Context.PRINT_SERVICE, 1024, 720))
.setColorMode(PrintAttributes.COLOR_MODE_COLOR).
setMinMargins(PrintAttributes.Margins.NO_MARGINS).build();
}
}
Note:
https://developer.android.com/training/printing/html-docs.html
And some times while loading pdf its not displaying.
2) I have tried using with pdf view lib ,
compile 'com.github.barteksc:android-pdf-viewer:2.8.2'
But that time am getting better view compared to webview. The problem is only visible view is drawing on canvas.The print view is not clear.Its not readable.I have given the page count, So according to the page count its repeating the pages but print view is same as in first page.The following view am getting while printing.
This is my sample code,
code
If anyone know please help me.

The above procedure is very hard.Even am not getting solution for that.After that i come up with a solution and its working perfectly for me.
1) To view PDF file no need to load with webview or external pdf libraries.Just download the pdf file and view it with default pdf viewer.The below code i have used,
To download a file,
import android.app.Activity;
import android.util.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class FileDownloader {
private static final int MEGABYTE = 1024 * 1024;
public static void downloadFile(String fileUrl, File directory, Activity activity){
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();
}
}
}
private class DownloadFile extends AsyncTask<String, Void, Void> {
#Override
protected Void doInBackground(String... strings) {
String fileUrl = strings[0];
String fileName = strings[1];
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File folder = new File(extStorageDirectory, "Test");
folder.mkdir();
File pdfFile = new File(folder, fileName);
try {
pdfFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
FileDownloader.downloadFile(fileUrl, pdfFile,InventoryStockActivity.this);
return null;
}
}
public void download(String viewUrl) {
new DownloadFile().execute(viewUrl, "Test.pdf");
Log.d("Download complete", "----------");
}
To view a pdf file;
public void view() {
File pdfFile = new File(Environment.getExternalStorageDirectory() + "/Test/" + "Test.pdf");
Uri path = Uri.fromFile(pdfFile);
Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
pdfIntent.setDataAndType(path, "application/pdf");
pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(pdfIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(InventoryStockActivity.this, "No Application available to view PDF", Toast.LENGTH_SHORT).show();
}
}
In manifest,
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
And when its open default pdf viewer, there will be print menu.Just print from there.

Writing to a file, but file is empty when I read it in [duplicate]

I want to save a file to the internal storage by getting the text inputted from EditText. Then I want the same file to return the inputted text in String form and save it to another String which is to be used later.
Here's the code:
package com.omm.easybalancerecharge;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText num = (EditText) findViewById(R.id.sNum);
Button ch = (Button) findViewById(R.id.rButton);
TelephonyManager operator = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String opname = operator.getNetworkOperatorName();
TextView status = (TextView) findViewById(R.id.setStatus);
final EditText ID = (EditText) findViewById(R.id.IQID);
Button save = (Button) findViewById(R.id.sButton);
final String myID = ""; //When Reading The File Back, I Need To Store It In This String For Later Use
save.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Get Text From EditText "ID" And Save It To Internal Memory
}
});
if (opname.contentEquals("zain SA")) {
status.setText("Your Network Is: " + opname);
} else {
status.setText("No Network");
}
ch.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Read From The Saved File Here And Append It To String "myID"
String hash = Uri.encode("#");
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:*141*" + /*Use The String With Data Retrieved Here*/ num.getText()
+ hash));
startActivity(intent);
}
});
}
I have included comments to help you further analyze my points as to where I want the operations to be done/variables to be used.

Hope this might be useful to you.
Write File:
private void writeToFile(String data,Context context) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("config.txt", Context.MODE_PRIVATE));
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
Log.e("Exception", "File write failed: " + e.toString());
}
}
Read File:
private String readFromFile(Context context) {
String ret = "";
try {
InputStream inputStream = context.openFileInput("config.txt");
if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append("\n").append(receiveString);
}
inputStream.close();
ret = stringBuilder.toString();
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}

For those looking for a general strategy for reading and writing a string to file:
First, get a file object
You'll need the storage path. For the internal storage, use:
File path = context.getFilesDir();
For the external storage (SD card), use:
File path = context.getExternalFilesDir(null);
Then create your file object:
File file = new File(path, "my-file-name.txt");
Write a string to the file
FileOutputStream stream = new FileOutputStream(file);
try {
stream.write("text-to-write".getBytes());
} finally {
stream.close();
}
Or with Google Guava
String contents = Files.toString(file, StandardCharsets.UTF_8);
Read the file to a string
int length = (int) file.length();
byte[] bytes = new byte[length];
FileInputStream in = new FileInputStream(file);
try {
in.read(bytes);
} finally {
in.close();
}
String contents = new String(bytes);
Or if you are using Google Guava
String contents = Files.toString(file,"UTF-8");
For completeness I'll mention
String contents = new Scanner(file).useDelimiter("\\A").next();
which requires no libraries, but benchmarks 50% - 400% slower than the other options (in various tests on my Nexus 5).
Notes
For each of these strategies, you'll be asked to catch an IOException.
The default character encoding on Android is UTF-8.
If you are using external storage, you'll need to add to your manifest either:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
or
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Write permission implies read permission, so you don't need both.

public static void writeStringAsFile(final String fileContents, String fileName) {
Context context = App.instance.getApplicationContext();
try {
FileWriter out = new FileWriter(new File(context.getFilesDir(), fileName));
out.write(fileContents);
out.close();
} catch (IOException e) {
Logger.logError(TAG, e);
}
}
public static String readFileAsString(String fileName) {
Context context = App.instance.getApplicationContext();
StringBuilder stringBuilder = new StringBuilder();
String line;
BufferedReader in = null;
try {
in = new BufferedReader(new FileReader(new File(context.getFilesDir(), fileName)));
while ((line = in.readLine()) != null) stringBuilder.append(line);
} catch (FileNotFoundException e) {
Logger.logError(TAG, e);
} catch (IOException e) {
Logger.logError(TAG, e);
}
return stringBuilder.toString();
}

Just a a bit modifications on reading string from a file method for more performance
private String readFromFile(Context context, String fileName) {
if (context == null) {
return null;
}
String ret = "";
try {
InputStream inputStream = context.openFileInput(fileName);
if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
int size = inputStream.available();
char[] buffer = new char[size];
inputStreamReader.read(buffer);
inputStream.close();
ret = new String(buffer);
}
}catch (Exception e) {
e.printStackTrace();
}
return ret;
}

The Kotlin way by using builtin Extension function on File
Write: yourFile.writeText(textFromEditText)
Read: yourFile.readText()

check the below code.
Reading from a file in the filesystem.
FileInputStream fis = null;
try {
fis = context.openFileInput(fileName);
InputStreamReader isr = new InputStreamReader(fis);
// READ STRING OF UNKNOWN LENGTH
StringBuilder sb = new StringBuilder();
char[] inputBuffer = new char[2048];
int l;
// FILL BUFFER WITH DATA
while ((l = isr.read(inputBuffer)) != -1) {
sb.append(inputBuffer, 0, l);
}
// CONVERT BYTES TO STRING
String readString = sb.toString();
fis.close();
catch (Exception e) {
} finally {
if (fis != null) {
fis = null;
}
}
below code is to write the file in to internal filesystem.
FileOutputStream fos = null;
try {
fos = context.openFileOutput(fileName, Context.MODE_PRIVATE);
fos.write(stringdatatobestoredinfile.getBytes());
fos.flush();
fos.close();
} catch (Exception e) {
} finally {
if (fos != null) {
fos = null;
}
}
I think this will help you.

I'm a bit of a beginner and struggled getting this to work today.
Below is the class that I ended up with. It works but I was wondering how imperfect my solution is. Anyway, I was hoping some of you more experienced folk might be willing to have a look at my IO class and give me some tips. Cheers!
public class HighScore {
File data = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator);
File file = new File(data, "highscore.txt");
private int highScore = 0;
public int readHighScore() {
try {
BufferedReader br = new BufferedReader(new FileReader(file));
try {
highScore = Integer.parseInt(br.readLine());
br.close();
} catch (NumberFormatException | IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
try {
file.createNewFile();
} catch (IOException ioe) {
ioe.printStackTrace();
}
e.printStackTrace();
}
return highScore;
}
public void writeHighScore(int highestScore) {
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
bw.write(String.valueOf(highestScore));
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

Kotlin
class FileReadWriteService {
private var context:Context? = ContextHolder.instance.appContext
fun writeFileOnInternalStorage(fileKey: String, sBody: String) {
val file = File(context?.filesDir, "files")
try {
if (!file.exists()) {
file.mkdir()
}
val fileToWrite = File(file, fileKey)
val writer = FileWriter(fileToWrite)
writer.append(sBody)
writer.flush()
writer.close()
} catch (e: Exception) {
Logger.e(classTag, e)
}
}
fun readFileOnInternalStorage(fileKey: String): String {
val file = File(context?.filesDir, "files")
var ret = ""
try {
if (!file.exists()) {
return ret
}
val fileToRead = File(file, fileKey)
val reader = FileReader(fileToRead)
ret = reader.readText()
reader.close()
} catch (e: Exception) {
Logger.e(classTag, e)
}
return ret
}
}

the first thing we need is the permissions in AndroidManifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
so in an asyncTask Kotlin class, we treat the creation of the file
import android.os.AsyncTask
import android.os.Environment
import android.util.Log
import java.io.*
class WriteFile: AsyncTask<String, Int, String>() {
private val mFolder = "/MainFolder"
lateinit var folder: File
internal var writeThis = "string to cacheApp.txt"
internal var cacheApptxt = "cacheApp.txt"
override fun doInBackground(vararg writethis: String): String? {
val received = writethis[0]
if(received.isNotEmpty()){
writeThis = received
}
folder = File(Environment.getExternalStorageDirectory(),"$mFolder/")
if(!folder.exists()){
folder.mkdir()
val readME = File(folder, cacheApptxt)
val file = File(readME.path)
val out: BufferedWriter
try {
out = BufferedWriter(FileWriter(file, true), 1024)
out.write(writeThis)
out.newLine()
out.close()
Log.d("Output_Success", folder.path)
} catch (e: Exception) {
Log.d("Output_Exception", "$e")
}
}
return folder.path
}
override fun onPostExecute(result: String) {
super.onPostExecute(result)
if(result.isNotEmpty()){
//implement an interface or do something
Log.d("onPostExecuteSuccess", result)
}else{
Log.d("onPostExecuteFailure", result)
}
}
}
Of course if you are using Android above Api 23, you must handle the request to allow writing to device memory. Something like this
import android.Manifest
import android.content.Context
import android.content.pm.PackageManager
import android.os.Build
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
class ReadandWrite {
private val mREAD = 9
private val mWRITE = 10
private var readAndWrite: Boolean = false
fun readAndwriteStorage(ctx: Context, atividade: AppCompatActivity): Boolean {
if (Build.VERSION.SDK_INT < 23) {
readAndWrite = true
} else {
val mRead = ContextCompat.checkSelfPermission(ctx, Manifest.permission.READ_EXTERNAL_STORAGE)
val mWrite = ContextCompat.checkSelfPermission(ctx, Manifest.permission.WRITE_EXTERNAL_STORAGE)
if (mRead != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(atividade, arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE), mREAD)
} else {
readAndWrite = true
}
if (mWrite != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(atividade, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), mWRITE)
} else {
readAndWrite = true
}
}
return readAndWrite
}
}
then in an activity, execute the call.
var pathToFileCreated = ""
val anRW = ReadandWrite().readAndwriteStorage(this,this)
if(anRW){
pathToFileCreated = WriteFile().execute("onTaskComplete").get()
Log.d("pathToFileCreated",pathToFileCreated)
}

We can use this code to write String to a file
public static void writeTextToFile(final String filename, final String data) {
File file = new File(filename);
try {
FileOutputStream stream = new FileOutputStream(file);
stream.write(data.getBytes());
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
Then in the Main code, we use this, for example
writeTextToFile(getExternalFilesDir("/").getAbsolutePath() + "/output.txt", "my-example-text");
After that, check the file at Android/data/<package-name>/files.

The easiest way to append to a text file in kotlin:
val directory = File(context.filesDir, "LogsToSendToNextMunich").apply {
mkdirs()
}
val file = File(directory,"Logs.txt")
file.appendText("You new text")
If you want to just write to the file:
yourFile.writeText("You new text")
writing anything to the files, using bytes:
FileOutputStream(file).use {
it.write("Some text for example".encodeToByteArray())
}

post image in Instagram

Question : In my app I need to post image in Instagram just like FB or Twitter.
What I have already done : Login and fetched photographs from the Instagram to my own app. But not getting any way for image posting in Instagram.

Yet it is not possible to post image in Instagram like FB or twitter.
But this is another way to achieve this using already installed Instagram and if not this will notify user to download app .
public void onClick(View v) {
Intent intent = getPackageManager().getLaunchIntentForPackage("com.instagram.android");
if (intent != null)
{
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.setPackage("com.instagram.android");
try {
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(MediaStore.Images.Media.insertImage(getContentResolver(), imagePath, "I am Happy", "Share happy !")));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
shareIntent.setType("image/jpeg");
startActivity(shareIntent);
}
else
{
// bring user to the market to download the app.
// or let them choose an app?
intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(Uri.parse("market://details?id="+"com.instagram.android"));
startActivity(intent);
}
}

No, you can't. Quoted from Instagram API docs :
At this time, uploading via the API is not possible. We made a conscious choice not to add this for the following reasons:
Instagram is about your life on the go – we hope to encourage photos from within the app. However, in the future we may give whitelist access to individual apps on a case by case basis.
We want to fight spam & low quality photos. Once we allow uploading from other sources, it's harder to control what comes into the Instagram ecosystem. All this being said, we're working on ways to ensure users have a consistent and high-quality experience on our platform.
UPDATE: However, if you're working on iOS (though you tagged Android), there is a way to "send" a photo (in fact, it opens the image in Instagram) via Custom URL Scheme. See this.

Try this link :
You can use this class to upload image to instagram.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpCookie;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Date;
import java.util.List;
import java.util.Map;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.net.ssl.HttpsURLConnection;
import org.apache.commons.codec.binary.Hex;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
public class InstagramPostHelper {
private static InstagramPostHelper instance = null;
protected InstagramPostHelper() {}
public static InstagramPostHelper getInstance() {
if (instance == null) {
instance = new InstagramPostHelper();
}
return instance;
}
private String GenerateSignature(String value, String key)
{
String result = null;
try {
byte[] keyBytes = key.getBytes();
SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA256");
Mac mac = Mac.getInstance("HmacSHA256");
mac.init(signingKey);
byte[] rawHmac = mac.doFinal(value.getBytes());
byte[] hexBytes = new Hex().encode(rawHmac);
result = new String(hexBytes, "UTF-8");
}
catch (Exception e) {
}
return result;
}
private static final String COOKIES_HEADER = "Set-Cookie";
public static java.net.CookieManager msCookieManager = new java.net.CookieManager();
private HttpsURLConnection conn;
private static String TextUtilsJoin(CharSequence delimiter, List<HttpCookie> list) {
StringBuilder sb = new StringBuilder();
boolean firstTime = true;
for (Object token: list) {
if (token.toString().trim().length()<1) continue;
if (firstTime) {
firstTime = false;
} else {
sb.append(delimiter + " ");
}
sb.append(token);
}
return sb.toString();
}
private String GetJSONStringAndPostData(String jsonaddress,String postdata,String agent)
{
String sonuc = "";
try {
byte[] postDataBytes = postdata.toString().getBytes("UTF-8");
URL url = new URL(jsonaddress);
conn = (HttpsURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
conn.setRequestProperty("User-Agent", agent);
//Set Cookies
if(msCookieManager.getCookieStore().getCookies().size() > 0)
{
conn.setRequestProperty("Cookie", TextUtilsJoin(";", msCookieManager.getCookieStore().getCookies()));
}
conn.setDoOutput(true);
conn.getOutputStream().write(postDataBytes);
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
//Get Cookies
Map<String, List<String>> headerFields = conn.getHeaderFields();
List<String> cookiesHeader = headerFields.get(COOKIES_HEADER);
if(cookiesHeader != null)
{
for (String cookie : cookiesHeader)
{
msCookieManager.getCookieStore().add(null,HttpCookie.parse(cookie).get(0));
}
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
while ((output = br.readLine()) != null) {
sonuc += output;
}
conn.disconnect();
} catch (MalformedURLException e) {
return "";
} catch (IOException e) {
return "";
}
return sonuc;
}
public void SendImage(String Caption,byte[] ImageByteArray) throws UnsupportedEncodingException, ParseException
{
String Agent = "Instagram 6.21.2 Android (19/4.4.2; 480dpi; 1152x1920; Meizu; MX4; mx4; mt6595; en_US)";
String Guid = java.util.UUID.randomUUID().toString();
String DeviceId = "android-" + Guid;
String Data = "{\"device_id\":\"" + DeviceId + "\",\"guid\":\"" + Guid + "\",\"username\":\"MYUSERNAME\",\"password\":\"MYPASSWORD\",\"Content-Type\":\"application/x-www-form-urlencoded; charset=UTF-8\"}";
String Sig = GenerateSignature(Data, "25eace5393646842f0d0c3fb2ac7d3cfa15c052436ee86b5406a8433f54d24a5");
Data = "signed_body=" + Sig + "." + URLEncoder.encode(Data, "UTF-8") + "&ig_sig_key_version=4";
if (msCookieManager.getCookieStore()!= null)
{
msCookieManager.getCookieStore().removeAll();
}
//Login Request
String login = GetJSONStringAndPostData("https://instagram.com/api/v1/accounts/login/", Data,Agent);
JSONParser parser = new JSONParser();
Object obj = parser.parse(login);
JSONObject jsonObject = (JSONObject) obj;
if (((String) jsonObject.get("status")).equals("ok")) //Login SuccessFul
{
//Login Successful
System.out.println("Login Successful !");
//Post Image
String upload = "";
try {
final HttpMultipartHelper http = new HttpMultipartHelper(new URL("https://instagram.com/api/v1/media/upload/"));
http.addFormField("device_timestamp", Long.toString((new Date()).getTime()));
http.addFilePart("photo", ImageByteArray);
final byte[] bytes = http.finish();
upload = new String(bytes);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println(upload);
obj = parser.parse(upload);
jsonObject = (JSONObject) obj;
if (((String) jsonObject.get("status")).equals("ok")) //Login SuccessFul
{
String mediaID = (String) jsonObject.get("media_id");
Data = "{\"device_id\":\"" + DeviceId + "\",\"guid\":\"" + Guid + "\",\"media_id\":\"" + mediaID + "\",\"caption\":\"" + Caption + "\",\"device_timestamp\":\"" + Long.toString((new Date()).getTime()).substring(0,10) + "\",\"source_type\":\"5\",\"filter_type\":\"0\",\"extra\":\"{}\",\"Content-Type\":\"application/x-www-form-urlencoded; charset=UTF-8\"}";
Sig = GenerateSignature(Data, "25eace5393646842f0d0c3fb2ac7d3cfa15c052436ee86b5406a8433f54d24a5");
Data = "signed_body=" + Sig + "." + URLEncoder.encode(Data, "UTF-8") + "&ig_sig_key_version=6";
//Login Request
System.out.println(Data);
String result = GetJSONStringAndPostData("https://instagram.com/api/v1/media/configure/", Data,Agent);
System.out.println(result);
}
}
else //Login UnsuccessFul
{
System.out.println("Login Unsuccessful !" + login);
}
}
}
https://gist.github.com/ecdundar/d5b6bdcc2035448fc9cd

It seems we're now able to do it, for more you can check official docs here

Try this
public void ShareInsta() {
File dir = new File(Environment.getExternalStorageDirectory(), "FolderName");
File imgFile = new File(dir, "0.png");
Intent sendIntent = new Intent(Intent.ACTION_VIEW);
sendIntent.setType("image/*");
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + imgFile));
sendIntent.putExtra(Intent.EXTRA_TEXT, "<---MY TEXT--->.");
sendIntent.setPackage("com.instagram.android");
sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
try {
startActivity(Intent.createChooser(sendIntent, "Share images..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(SaveAndShareActivity.this, "Please Install Instagram", Toast.LENGTH_LONG).show();
}
}

Unable to download file created by my app on Google Drive, But can get the metadata of that file

I followed all the steps mentioned in google drive sdk. I created a sample application on my device(android, running jelly bean) and am able to upload a file on to drive. When trying to download the same file, I am able to get the meta data like fileID, fileTitle, fileDownloadURL etc but not able to download the content. I get 401 Unauthorized error.
My app AUTH SCOPE is AUTH_TOKEN_TYPE = "oauth2:https://www.googleapis.com/auth/drive.file";
I am doing the following to get the OAUTH Token:
AccountManager am = AccountManager.get(this);
Bundle options = new Bundle();
am.getAuthToken(
mAccount,
AUTH_TOKEN_TYPE,
options,
this,
new OnTokenAcquired(),
new Handler(){
#Override
public void handleMessage(Message msg) {
invadiateToken();
super.handleMessage(msg);
}
});
Based on the token this is how I build the Drive object
Drive buildService(final String AuthToken) {
HttpTransport httpTransport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
Drive.Builder b = new Drive.Builder(httpTransport, jsonFactory, null);
b.setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {
#Override
public void initialize(JsonHttpRequest request) throws IOException {
DriveRequest driveRequest = (DriveRequest) request;
driveRequest.setPrettyPrint(true);
driveRequest.setKey(API_KEY);
driveRequest.setOauthToken(AuthToken);
}
});
return b.build();
}
I am able to upload the file using the following code:
private void uploadLocalFileToDrive(Drive service) throws IOException{
// File's metadata.
String mimeType = "text/plain";
File body = new File();
body.setTitle("myText.txt");
body.setDescription("sample app by varun");
body.setMimeType("text/plain");
// File's content.
java.io.File fileContent = new java.io.File(mInternalFilePath);
FileContent mediaContent = new FileContent(mimeType, fileContent);
service.files().insert(body, mediaContent).execute();
}
While trying to download the same file uploaded by this app, I get a 401 unauthorized error at this line HttpResponse resp = service.getRequestFactory().buildGetRequest(url).execute() from the following code snippet
private void downloadFileFromDrive(Drive service) throws IOException {
Files.List request;
request = service.files().list();
do {
FileList files = request.execute();
for(File file:files.getItems()){
String fieldId = file.getId();
String title = file.getTitle();
Log.e("MS", "MSV:: Title-->"+title+" FieldID-->"+fieldId+" DownloadURL-->"+file.getDownloadUrl());
if (file.getDownloadUrl() != null && file.getDownloadUrl().length() > 0 ) {
GenericUrl url = new GenericUrl(file.getDownloadUrl());
HttpResponse resp = service.getRequestFactory().buildGetRequest(url).execute();
InputStream isd = resp.getContent();
Log.e("MS", "MSV:: FileOutPutStream--->"+getFilesDir().getAbsolutePath()+"/downloaded.txt");
} else {
Log.e("MS", "MSV:: downloadURL for this file is null");
}
}
request.setPageToken(files.getNextPageToken());
} while (request.getPageToken()!=null && request.getPageToken().length()>0);
}
Can anyone help me out and let me know what I am doing wrong???

This is a known issue that will be resolved with the release of the Google Play Services APIs.
Since your application is authorized for the https://www.googleapis.com/auth/drive.file scope, and the download endpoint doesn't support the ?key= query parameter, there is no way for our server to know which project is issuing the request (to make sure the app has authorization to read this file's content).
In the meantime, the only workaround I can recommend is using the broad scope: https://www.googleapis.com/auth/drive. Please use only that while developing your application and waiting for the Google Play Services to be released.
To learn more about how you will be able to use the new authorization APIs in Android, you might be interested in those 2 Google I/O talks: Building Android Applications that Use Web APIs and
Writing Efficient Drive Apps for Android

I have answered this question, and all related Drive on Android questions, over here:
Android Open and Save files to/from Google Drive SDK
In that answer, I posted code for a method that I used to download files from Google Drive (if the following code by itself isn't clear, have a look at the complete answer that I linked to.)
private java.io.File downloadGFileToJFolder(Drive drive, String token, File gFile, java.io.File jFolder) throws IOException {
if (gFile.getDownloadUrl() != null && gFile.getDownloadUrl().length() > 0 ) {
if (jFolder == null) {
jFolder = Environment.getExternalStorageDirectory();
jFolder.mkdirs();
}
try {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(gFile.getDownloadUrl());
get.setHeader("Authorization", "Bearer " + token);
HttpResponse response = client.execute(get);
InputStream inputStream = response.getEntity().getContent();
jFolder.mkdirs();
java.io.File jFile = new java.io.File(jFolder.getAbsolutePath() + "/" + getGFileName(gFile)); // getGFileName() is my own method... it just grabs originalFilename if it exists or title if it doesn't.
FileOutputStream fileStream = new FileOutputStream(jFile);
byte buffer[] = new byte[1024];
int length;
while ((length=inputStream.read(buffer))>0) {
fileStream.write(buffer, 0, length);
}
fileStream.close();
inputStream.close();
return jFile;
} catch (IOException e) {
// Handle IOExceptions here...
return null;
}
} else {
// Handle the case where the file on Google Drive has no length here.
return null;
}
}

I don't think we need any Access Token to download a file. I had the same problem, and this worked:
private class DownloadFile extends AsyncTask<Void, Long, Boolean> {
private com.google.api.services.drive.model.File driveFile;
private java.io.File file;
public DownloadFile(File driveFile) {
this.driveFile = driveFile;
}
#Override
protected Boolean doInBackground(Void... params) {
if (driveFile.getDownloadUrl() != null
&& driveFile.getDownloadUrl().length() > 0) {
try {
HttpResponse resp = mDriveService
.getRequestFactory()
.buildGetRequest(
new GenericUrl(driveFile.getDownloadUrl()))
.execute();
OutputStream os = new FileOutputStream(file);
CopyStream(resp.getContent(), os);
os.close();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
} else {
return false;
}
}
#Override
protected void onPostExecute(Boolean result) {
//use the file
}
}
public static void CopyStream(InputStream is, OutputStream os) {
final int buffer_size = 1024;
try {
byte[] bytes = new byte[buffer_size];
for (;;) {
int count = is.read(bytes, 0, buffer_size);
if (count == -1)
break;
os.write(bytes, 0, count);
}
} catch (Exception ex) {
}
}

Can't write an Object. Read-only file system

I'm trying to save this Object, Inventory, to the internal storage. I have the saving and getting methods in the class itself. When I try and call the save method, I end up with the exception. I had the Exception message write to the Logcat, and here's what I got:
08-04 02:32:23.690: VERBOSE/alex(278): /test (Read-only file system)
The file /test is "Read-only file system", but I had allowed writing external storage in the Manifest file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
Here's the Inventory class. The last two methods are the save and read methods.
package com.androidbook.inventoryproject;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import android.util.Log;
public class Inventory implements Serializable {
private static final long serialVersionUID = 1L;
int numIngred;;
Ingredient[] ingredients;
ArrayList ingred = new ArrayList<Ingredient>();
public Inventory() {
numIngred = 0;
ingredients = new Ingredient[numIngred];
}
public int getNumIngred() {
return numIngred;
}
public String getIngredientName(int n) {
return ((Ingredient)ingred.get(n)).getName();
}
public Ingredient[] getIngredients() {
return ingredients;
}
public Ingredient getIngredient(int n) {
return (Ingredient)ingred.get(n);
}
public void addIngredient(String iname) {
numIngred++;
ingred.add(new Ingredient(iname));
}
public boolean saveInventory( Inventory inv) {
File suspend_f = new File("test");
FileOutputStream fos = null;
ObjectOutputStream oos = null;
boolean keep = true;
try {
fos = new FileOutputStream(suspend_f);
oos = new ObjectOutputStream(fos);
oos.writeObject(inv);
}
catch (Exception e) {
keep = false;
Log.v("alex", "" + e.getMessage());
}
finally {
try {
if (oos != null) oos.close();
if (fos != null) fos.close();
if (keep == false) suspend_f.delete();
}
catch (Exception e) { /* do nothing */ }
}
return keep;
}
public Inventory getInventory() {
File suspend_f = new File("test");
Inventory inven = null;
FileInputStream fis = null;
ObjectInputStream ois = null;
try{
fis = new FileInputStream(suspend_f);
ois = new ObjectInputStream(fis);
inven = (Inventory)ois.readObject();
}
catch (Exception e) {
String mess = e.getMessage();
}
finally {
try {
if (fis != null)
fis.close();
if (ois != null)
ois.close();
}
catch (Exception e) { }
}
return inven;
}
}

WRITE_EXTERNAL_STORAGE lets you write to the SD card, not to the filesystem root. You should try this:
File suspend_f = new File(Environment.getExternalStorageDirectory(), "test");
This verifies that the file you are using goes into a writable external folder.
EDIT: there is a bunch of other work you should do to verify that the SD card is available and writable. Read the specs to see how to make your file access robust by checking availability.