Develop Reference

How to add App specific permissions to Android DocumentProvider

I want to create a file in AppA and then be able to access it from AppB only. I am able to create the file via the DocumentProvider and then access it via StorageClient see examples here. How do I setup the permission on the file in AppA so that only AppB can access it?
Method for file creation in AppA
String s = "kv;ab\nkv1;cd";
try {
byte[] buffer = s.getBytes();
String filename = "myfile.txt";
System.out.println("filename="+filename);
FileOutputStream fos = getContext().openFileOutput(filename, Context.MODE_PRIVATE);
fos.write(buffer);
fos.close();
System.out.println(s);
} catch (IOException e) {
e.printStackTrace();
}
}
Methods for File access in AppB
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("text/plain");
Uri pickerInitialUri= Uri.parse("content://com.example.android.storageprovider.documents/document/root%3Amyfile.txt");
intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, pickerInitialUri);
startActivityForResult(intent, READ_REQUEST_CODE);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
super.onActivityResult(requestCode, resultCode, resultData);
readFileExternalStorage();
}
public String readFileExternalStorage() {
String s = "";
Uri uri1 = Uri.parse("content://com.example.android.storageprovider.documents/document/root%3Amyfile.txt");
try {
InputStream ins = this.getBaseContext().getContentResolver().openInputStream(uri1);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
int size;
byte[] buffer = new byte[1024];
while ((size = ins.read(buffer, 0, 1024)) >= 0) {
outputStream.write(buffer, 0, size);
}
ins.close();
buffer = outputStream.toByteArray();
s = new String(buffer);
System.out.println("output=" + s);
} catch (FileNotFoundException e) {
System.out.println("An error occurred.");
e.printStackTrace();
} catch (IOException e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
TextView textview = findViewById(R.id.textView);
textview.setText(s);
return "ok\n" + s;
}

Two probable options-
https://developer.android.com/guide/topics/permissions/defining
Use a shared encryption key with user based salt to encrypt and decrypt stored files on Android

Not able to upload camera captured image on server in android

I am working on an app in which I want to get image from gallery or camera and then send it to server using multipart. I am able to send picture from gallery to server but when I tried to send image from camera it shows me failure.
// code for the same
// code fro open camera
private void cameraIntent() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_CAMERA);
}
// on activity result
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CAMERA) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File destination = new File(Environment.getExternalStorageDirectory(),
System.currentTimeMillis() + ".jpg");
Log.d("TAG", "onActivityResult: "+Uri.fromFile(destination));
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
filePath = destination.toString();
if (filePath != null) {
try {
execMultipartPost();
} catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(getActivity(), "Image not capturd!", Toast.LENGTH_LONG).show();
}
}
// send to server code
private void execMultipartPost() throws Exception {
File file = new File(filePath);
String contentType = file.toURL().openConnection().getContentType();
Log.d("TAG", "file new path: " + file.getPath());
Log.d("TAG", "contentType: " + contentType);
RequestBody fileBody = RequestBody.create(MediaType.parse(contentType), file);
final String filename = "file_" + System.currentTimeMillis() / 1000L;
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("date", "21-09-2017")
.addFormDataPart("time", "11.56")
.addFormDataPart("description", "hello")
.addFormDataPart("image", filename + ".jpg", fileBody)
.build();
Log.d("TAG", "execMultipartPost: "+requestBody);
okhttp3.Request request = new okhttp3.Request.Builder()
.url("http://myexample/api/user/lets_send")
.post(requestBody)
.build();
OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(Call call, final IOException e) {
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getActivity(), "nah", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void onResponse(Call call, final okhttp3.Response response) throws IOException {
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
try {
Log.d("TAG", "response of image: " + response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
});
}
// I am getting onFailure executed while try to upload image from camera.
okHttpClient.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(Call call, final IOException e) {

As per comments :
Get image from gallery or camera like this :
File mainFile = null;
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
String partFilename = currentDateFormat();
mainFile = storeCameraPhotoInSDCard(bitmap, partFilename);
public String currentDateFormat() {
String currentTimeStamp = null;
try {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HH_mm_ss");
currentTimeStamp = dateFormat.format(new Date());
} catch (Exception e) {
e.printStackTrace();
}
return currentTimeStamp;
}
public File storeCameraPhotoInSDCard(Bitmap bitmap, String currentDate) {
File outputFile = new File(Environment.getExternalStorageDirectory(), "photo_" + currentDate + ".jpg");
try {
FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream);
fileOutputStream.flush();
fileOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return outputFile;
}
Use mainFile to send in RequestBody and pass like execMultipartPost(File file)

How to capture a photo and immediately put it into an existing pdf?

I couldn't find the solution for my issue. My MainActivity creates a pdf file, the user adds some text via EditText and closes it, no problem with that. Then I have a secondary activity that is calling the MediaStore.ACTION_IMAGE_CAPTURE to take pictures. Once a picture is taken, I'd like to know how I can get this just-captured image into that pdf.
I know I have to reopen the pdf, that is no problem, since I have the pdf file name saved in a variable. The major problem that I see is that I don't know how to programmatically get the file name of the picture, once it is automatically named after "yyyyMMdd_hhMMss.jpg". So how to get the file name from a picture taken by my secondary activity?
*EDIT - Showing code:
From MainActivity:
public class MainActivity extends Activity {
public String FILE = Environment.getExternalStorageDirectory() + "/CoManut/sample.pdf";
public static Font catFont = new Font(Font.FontFamily.TIMES_ROMAN, 18, Font.BOLD);
public static Font redFont = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.NORMAL, BaseColor.RED);
public static Font subFont = new Font(Font.FontFamily.TIMES_ROMAN, 16, Font.BOLD);
public static Font smallBold = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.BOLD);
EditText estRep;
EditText sensRep;
EditText cabRep;
String estais;
String sensores;
String cabos;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
estRep = (EditText)findViewById(R.id.estaisRep);
sensRep = (EditText)findViewById(R.id.sensoresRep);
cabRep = (EditText)findViewById(R.id.cabosRep);
}
public void gerarPDF(View view) {
estais = estRep.getText().toString();
sensores = sensRep.getText().toString();
cabos = cabRep.getText().toString();
try {
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(FILE));
document.open();
addMetaData(document);
addTitlePage(document);
addContent(document);
document.close();
} catch (Exception e) {
e.printStackTrace();
}
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("CoManut");
alertDialog.setMessage("Picture?");
alertDialog.setButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(MainActivity.this, PhotoActivity.class);
startActivity(intent);
}
});
alertDialog.setButton2("NO", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "Thanks for using this app!", Toast.LENGTH_LONG).show();
MainActivity.this.finish();
}
});
alertDialog.setIcon(R.mipmap.ic_launcher);
alertDialog.show();
}
private static void addMetaData(Document document) {
document.addTitle("Image and text to PDF");
document.addSubject("Using iText");
document.addKeywords("Java, PDF, iText");
document.addAuthor("Ricardo Gramowski");
document.addCreator("Ricardo Gramowski");
}
private static void addTitlePage(Document document)
throws DocumentException {
Paragraph preface = new Paragraph();
addEmptyLine(preface, 1);
preface.add(new Paragraph("Maintenance report", catFont));
addEmptyLine(preface, 1);
preface.add(new Paragraph("Report generated by: " + System.getProperty("user.name") + ", " + new Date(),
smallBold));
addEmptyLine(preface, 3);
preface.add(new Paragraph("This doc is important", smallBold));
addEmptyLine(preface, 8);
preface.add(new Paragraph("This doc has been generated by Gramowski.",
redFont));
document.add(preface);
// Start a new page
document.newPage();
}
private void addContent(Document document) throws DocumentException {
Anchor anchor = new Anchor("Chapter 1", catFont);
anchor.setName("Chapter 1");
Chapter catPart = new Chapter(new Paragraph(anchor), 1);
Paragraph subPara = new Paragraph("Results", subFont);
Section subCatPart = catPart.addSection(subPara);
addEmptyLine(subPara, 1);
createTable(subCatPart);
document.add(catPart);
}
private void createTable(Section subCatPart)
throws BadElementException {
PdfPTable table = new PdfPTable(2);
PdfPCell c1 = new PdfPCell(new Phrase("Item"));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
c1 = new PdfPCell(new Phrase("Is that good? (OK/Not OK)"));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
table.setHeaderRows(1);
table.addCell("Estais da Torrre ");
table.addCell(estais);
table.addCell("Sensores ");
table.addCell(sensores);
table.addCell("Cabos ");
table.addCell(cabos);
subCatPart.add(table);
}
private static void addEmptyLine(Paragraph paragraph, int number) {
for (int i = 0; i < number; i++) {
paragraph.add(new Paragraph(" "));
}
}
}
And my PhotoActivity:
public class PhotoActivity extends ActionBarActivity {
Button b1;
ImageView iv;
Bitmap bp;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo);
b1 = (Button) findViewById(R.id.button1);
iv = (ImageView) findViewById(R.id.imageView);
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 0);
}
});
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap mImageBitmap = (Bitmap) extras.get("data");
iv.setImageBitmap(mImageBitmap);
String fpath = Environment.getExternalStorageDirectory() + "/CoManut/sample.pdf";
File file = new File(fpath);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Document document = new Document();
try {
PdfWriter.getInstance(document, new FileOutputStream(fpath));
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (DocumentException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
document.open();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
mImageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
Image myImg = null;
try {
myImg = Image.getInstance(stream.toByteArray());
} catch (BadElementException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
myImg.setAlignment(Image.MIDDLE);
try {
document.add(myImg);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
document.close();
}
}
// Button to go back to the MainActivity
public void onclickButton2(View view) {
PhotoActivity.this.finish();
}
#Override
protected void onDestroy() {
super.onDestroy();
}
}

Override your onActivitResult() method in your Main Activity
Here you will get the image bitmap from (Intent Data)
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap mImageBitmap = (Bitmap) extras.get("data");
}
}
Now you have the bitmap. You can add bitmap image like below using the iText Library
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
mImageBitmap.compress(Bitmap.CompressFormat.PNG, 100, stream); // Try with Bitmap.CompressFormat.JPG also
Image image = Image.getInstance(stream.toByteArray());
document.add(image);
}catch(IOException ex){
ex.printStackTrace();
}
Update1
Your onActivityResult() should look like this.
Note Make sure you have WRITE_EXTERNAL_STORAGE permissions in your menifest.xml file.
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap mImageBitmap = (Bitmap) extras.get("data");
img.setImageBitmap(mImageBitmap);
String fpath = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/sample.pdf";
File file = new File(fpath);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Document document = new Document();
try {
PdfWriter.getInstance(document, new FileOutputStream(fpath));
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (DocumentException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
document.open();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
mImageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
Image myImg = null;
try {
myImg = Image.getInstance(stream.toByteArray());
} catch (BadElementException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
myImg.setAlignment(Image.MIDDLE);
try {
document.add(myImg);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
document.close();
}
}
This will create a sample.pdf file in your sdcard and add Image bitmap into it.
Hope this helps.
I tested it here its working. :)

camera captured image share to different application

I am working on a application in which there a part of taking images
from camera and have to share images to the different applications . I am using a code but it is not sharing the images. please have a look and please tell where I am wrong.
image = (ImageView)findViewById(R.id.image);
share = (Button)findViewById(R.id.share);
click = (Button)findViewById(R.id.click);
click.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_PIC_REQUEST);
}
});
share.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
BitmapDrawable bitmapDrawable = (BitmapDrawable)image.getDrawable();
Bitmap bitmap = bitmapDrawable.getBitmap();
// Save this bitmap to a file.
File cache = getApplicationContext().getExternalCacheDir();
File sharefile = new File(cache, "toshare.png");
try {
FileOutputStream out = new FileOutputStream(sharefile);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
} catch (IOException e) {
}
// Now send it out to share
Intent share = new Intent(android.content.Intent.ACTION_SEND);
share.setType("image/*");
share.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + sharefile));
try {
startActivity(Intent.createChooser(share, "Share photo"));
} catch (Exception e) {
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
//2
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
image.setImageBitmap(thumbnail);
//3
share.setVisibility(0);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
//4
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg");
try {
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
//5
fo.write(bytes.toByteArray());
fo.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

Upload photo to FB from Android : No Error but no file uploaded to facebook

Here is the code for uploading picture into my facebook :
Bundle parameters = new Bundle();
parameters.putString("message", msg);
byte[] imgData = getImage("http://bandungraos.in/wp-content/resto/1/gallery/kepiting1.jpg");
parameters.putByteArray("picture", imgData);
if (imgData != null) {
try {
String response = facebook.request("me/photos", parameters,"POST");
System.out.println(response);
} catch (IOException e) {
e.printStackTrace();
}
}
.....
private byte[] getImage(String url) {
try {
URL imgUrl = new URL(url);
HttpURLConnection cn = (HttpURLConnection) imgUrl.openConnection();
cn.setDoInput(true);
cn.connect();
int length = cn.getContentLength();
byte[] imgData = new byte[length];
InputStream is = cn.getInputStream();
is.read(imgData);
return imgData;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
I checked that either access token or imgData is not null
There is no error but I can't find the image in my facebook.
Thanks in advance

According to the User object documentation about the Photos connection the image parameter is named "source" and not "picture", have you tried:
Bundle parameters = new Bundle();
parameters.putString("message", msg);
parameters.putByteArray("source", getImage("..."));

I had the same problem and i used this code `
private void upload_FB(Bitmap photo2) {
// TODO Auto-generated method stub
Calendar c = Calendar.getInstance();
String name = c.getTime().toString();
AsyncFacebookRunner fruner = new AsyncFacebookRunner(facebook);
Log.d("adr", mCurrentPhotoPath);
if(photo2!=null && mCurrentPhotoPath!=null){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
photo2.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] bMapArray = baos.toByteArray();
Bundle params = new Bundle();
params.putByteArray("photo",bMapArray);
params.putString("caption", name);
fruner.request("me/photos",params,"POST",new PhotoUploadListener(),null);
}else
Toast.makeText(ctx, "ERROR", Toast.LENGTH_LONG).show();
}
don't forget to add premision photo_upload
`