I am trying to save bitmap to sd cart, but it saved like black image.
This code shows like I am creating bitmap
mStoryView.setDrawingCacheEnabled(true);
mStoryView.buildDrawingCache();
Bitmap result = Bitmap.createBitmap(mStoryView.getDrawingCache());
mStoryView.setDrawingCacheEnabled(false);
result = ImageUtil.saveStoryImage(this,result);
On this step bitmap looks good ( I set it on background view).
public static Bitmap saveStoryImage(Context context, Bitmap result) {
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File file = new File(extStorageDirectory, "test.png");
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(file);
boolean b = result.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
After that I go to my sd card ondevice and saw black image.
What is the problem?
Related
I wrote code witch can to save image to sd card.my code working perfect but when i going to sd car with file system my image is public.this is my code
private Bitmap takeScreenShot(Context content, ScrollView view) {
int totalHeight = view.getChildAt(0).getHeight();
int totalWidth = view.getChildAt(0).getWidth();
Bitmap bitmap = getBitmapFromView(view, totalHeight, totalWidth);
File imagePath = new File(Environment.getExternalStorageDirectory()
+ "/image.jpg");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
MediaStore.Images.Media.insertImage(content.getContentResolver(),
bitmap, "Screen", "screen");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return bitmap;
}
how i can save imege in sd card to can hide or unpublish my image.i meean ,i don't need to can show it with file manager
if anyone knows solution please help me
I created a bitmap with text and I can view it in an Imageview, but when I save the Bitmap I only get a black image. I have spend three hours looking at similar questions but none of the worked for me. Here is the code.
Thanks for any help.
public void createBitmap(){
Bitmap LabelBitmap;
FileOutputStream fos = null;
//create Text Bitmap
LabelBitmap = textAsBitmap(this,"BRO D 0813","fonts/arialbd.ttf", 4, Color.BLACK);
//load bitmap in to Imageview
ImageView myImageView = (ImageView) findViewById(R.id.imageView);
myImageView.setImageBitmap(LabelBitmap);
// save bitmap
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/myfolder");
myDir.mkdirs();
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
LabelBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
if (!myDir.exists()) {
myDir.mkdir();
}
File myDirFile = new File(root +"/myfolder/mybitmap.jpg");
try {
if(myDirFile.exists()){
myDirFile.delete();
}
myDirFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
try {
fos = new FileOutputStream(myDirFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
fos.write(bytes.toByteArray());
fos.flush();
fos.close();
Toast.makeText(this, "Image saved", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
e.printStackTrace();
}
}
JPEG Image has a black background by default, so if your text color is also black you will get a black image. If your image has no background color, you must save it as PNG. Change as following and have a try:
LabelBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
to:
LabelBitmap.compress(Bitmap.CompressFormat.PNG, 100, bytes);
I was Developing an application which will have image on image view .
My need:
What i need is When i click the button then it should store the image that exist in the image view to the sd card(emulator).
Here is how i used:(but no expected results)
Button btnWriteSDFile = (Button) findViewById(R.id.btnWriteSDFile);
btnWriteSDFile.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ImageView myImage = (ImageView) findViewById(R.id.imageView1);
BitmapDrawable drawable = (BitmapDrawable) myImage.getDrawable();
Bitmap bitmap = drawable.getBitmap();
File sdCardDirectory = Environment.getExternalStorageDirectory();
File image = new File(sdCardDirectory, "image.png");
boolean success = false;
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
success = true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (success) {
Toast.makeText(getApplicationContext(), "Image saved with success",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Error during image saving", Toast.LENGTH_LONG).show();
}
}
});
In my above code i didnt get any error
It simply Shows that "save file in mnt/sd/image.png" but no images found.
It would be appreciable if some one helps me to get me out from this rid.
**
"Found out where the exact issues": My program was running perfectly
# 1st time if i click button and check in gallery means there is no
image but once i close and open the emulator then there is a image.But
i need to see the image as soon as updated how to do this any ideas?
**
Your code looks good, but in order to write something to external storage, you should have the following permission declared in the manifest:
android.permission.WRITE_EXTERNAL_STORAGE
if you use some thing like
ImageView myImage = (ImageView) findViewById(R.id.imageView1);
myImage .setDrawingCacheEnabled(true);
myImage .buildDrawingCache();
Bitmap bitmap = myImage .getDrawingCache();
File sdCardDirectory = Environment.getExternalStorageDirectory();
File image = new File(sdCardDirectory, "image.png");
boolean success = false;
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
success = true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (success) {
Toast.makeText(getApplicationContext(), "Image saved with success",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Error during image saving", Toast.LENGTH_LONG).show();
}
}
});
and please set the following permission in androidManifest.xml
android.permission.WRITE_EXTERNAL_STORAGE
Try below code to take a screenshot
private static Bitmap takeScreenShot()
{
Bitmap bitmap = ((BitmapDrawable)image.getDrawable()).getBitmap();
return bitmap;
}
For saving
private File saveBitmap(Bitmap bitmap)
{
File snapShot=null;
try
{
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + "test.jpg");
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.close();
} catch (Exception e)
{
e.printStackTrace();
}
return snapShot;
}
Need to give permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
When I take a picture with my Android camera, there is an image (imageview3) on my screen that I want to save with my picture.
Here is my onPictureTaken method
public void onPictureTaken(byte[] data, Camera camera) {
File imagesFolder = new File(Environment.getExternalStorageDirectory(), "/Ker");
imagesFolder.mkdirs();
String fileName = "Ker_.jpg";
output = new File(imagesFolder, fileName);
ImageView view = (ImageView) gameactivity.findViewById(R.id.imageView3);
view.setDrawingCacheEnabled(true);
Bitmap b = view.getDrawingCache();
FileOutputStream fos = null;
try {
fos = new FileOutputStream(output);
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
b.compress(CompressFormat.JPEG, 95, fos);
try {
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
camera.stopPreview();
}
When I open the folder, the picture saved is only the imageview3 with a black background. Why has the real camera view not been saved?
EDIT
I'm trying something with canvas too:
output = new File(imagesFolder, fileName);
ImageView view = (ImageView) gameactivity.findViewById(R.id.imageView3);
view.setDrawingCacheEnabled(true);
Bitmap b = view.getDrawingCache();
FileOutputStream fos = null;
try {
fos = new FileOutputStream(output);
fos.write(data);
fos.close();
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
FileOutputStream fos2 = null;
b.compress(CompressFormat.JPEG, 95, fos2);
try {
Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fos.getFD());
Bitmap bitmap2 = BitmapFactory.decodeFileDescriptor(fos2.getFD());
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(bitmap2, null, null);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Is that correct? How to save the canvas into a file on my sdcard (ie write data from canvas on fileoutputstream)
You're appending the JPEG of the imageview and the JPEG from the camera into a single file.
Create a separate file output stream for each file, and write the data from Bitmap.compress() and the onPictureTaken data array into their own streams.
If you want the two images to be combined into a single image, you'll need to decode the data array into a Bitmap, and then use a Canvas to draw the ImageView bitmap and the camera-captured Bitmap onto the canvas in the arrangement you want, and then save that out as a single jpeg.
You can't simply concatenate two compressed JPEG bitstreams together; the file format doesn't work that way.
I am using ImageView in my android application here i show the images from webservice so i am using UrlImageViewHelper. i want to store this image into android Gallery files.
my images like:
String Images = dataExtra.get("images").toString();
System.out.println("image URL"+Images);
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(Images);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
i tried like this.. but its not working. Any one can help me how to store these Images into Android Gallery?
i got solution for this problem, Here my answer
private void saveImagesIntoGallery(){
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();
// File sdCardDirectory = Environment.getExternalStorageDirectory();// its stores under sdcard not in a specific path
String sdCardDirectory = Environment.getExternalStorageDirectory().toString()+"/Pictures/";
String url = arrayForImages[i].toString();
String file = url.substring(url.lastIndexOf('/')+1);
System.out.println("PATH NAME"+sdCardDirectory);
File image = new File(sdCardDirectory, file);
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) {
Toast.makeText(getApplicationContext(), "Image saved with success",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Error during image saving", Toast.LENGTH_LONG).show();
}
}
Are you sure that the gallery is the best place to store images of webservice?
If you wanted to save to internal storage:
public void saveBitmap(String name, Bitmap bitmap){
if(bitmap!=null && name!=null){
FileOutputStream fos;
if(bitmap!=null){
try {
fos = openFileOutput(name, Context.MODE_PRIVATE);
bitmap.compress(CompressFormat.JPEG, 90, fos);
} catch (FileNotFoundException e) {}
}
}
}
To gallery, i have not examples here. But search a little;)