Develop Reference

Cropping Image view

i M passing a bitmap from one activity to other, after taking the screen shot
Bitmap bitmap;
bitmap = takeScreenshot();
try {
//Write file
String filename = "bitmap.png";
FileOutputStream stream = this.openFileOutput(filename, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
//Cleanup
stream.close();
bitmap.recycle();
//Pop intent
Intent in1 = new Intent(this, FinalImageShare.class);
in1.putExtra("image", filename);
startActivity(in1);
} catch (Exception e) {
e.printStackTrace();
}
here i am getting the image in other activity , the problem is that the tool bar height is also coming (i m hiding the toool bar by setVisibility, )i want to crop the image so that toolbar height wont come.TIA
imageView=(ImageView)findViewById(R.id.imageView);
String filename = getIntent().getStringExtra("image");
try {
FileInputStream is = this.openFileInput(filename);
bmp = BitmapFactory.decodeStream(is);
is.close();
} catch (Exception e) {
e.printStackTrace();
}

You can use createBitmap method, like so:
resizedbitmap = Bitmap.createBitmap(bitmap, 0, 0, yourwidth, yourheight);
Where bitmap is the bitmap you create, and resizedbitmap is the cropped one.
createBitmap() method takes as parameter in this case: bitmap, start X, start Y, width and height.
You can use those two methods to get your width and height:
bitmap.getWidth(), bitmap.getHeight()
Check also this link to learn about the createBitmap method:
Developer site
Or you can use the drawing cache property for this, like this :
View main = findViewById(R.id.view);
Bitmap screenshot;
main.setDrawingCacheEnabled(true);
screenshot = Bitmap.createBitmap(main.getDrawingCache());
main.setDrawingCacheEnabled(false);
Or similar to the last one, ctx.getWindow().getDecorView() View to get full screen bitmap cache:
View view = ctx.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
Bitmap bmap = view.getDrawingCache();
int contentViewTop = ctx.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop(); /* skip status bar in screenshot */
Storage.shareBitmapInfo = Bitmap.createBitmap(bmap, 0, contentViewTop, bmap.getWidth(), bmap.getHeight() - contentViewTop, null, true);
view.setDrawingCacheEnabled(false);
Hope this helps!

Save layout as an image

I have a LinearLayout and I am want to save the contents of that view as an image. I have it half working.
File imageFile;
// image naming and path to include sd card appending name you choose for file
String mPath = Environment.getExternalStorageDirectory().toString() + "/a.png";
// create bitmap screen capture
View v1 = getWindow().getDecorView().getRootView();
Bitmap bitmap;
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
OutputStream fout = null;
imageFile = new File(mPath);
try {
fout = new FileOutputStream(imageFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 10, fout);
fout.flush();
fout.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
With the above code it will save a copy of the view, but only what's seen on the device screen. I have more information on the view that I want saved. The code above from here and this will only save the information seen on the screen as an image. I want all the information saved, even the information that is not on the screen (where you need to scroll to see).
How can I achieve that?

Another option is to use:
Bitmap b = Bitmap.createBitmap(width, height....)
v1.setLayoutParams // Full width and height of content
Canvas c = new Canvas(b);
v1.draw(c); // You now have full bitmap
saveBitmap(b);

Run a measure/layout pass on it and draw it to a canvas. Suppose your parent was called "view" and was a vertical LinearLayout:
view.measure(someWidth, MeasureSpec.UNSPECIFIED);
Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bitmap);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.draw(c);

whole viewgroup to bitmap

Is it possible to get a full bitmap from a viewgroup-object?
This code takes a 'screenshot' off the view group that's currently on the screen, but I want the whole view, also what's not currently on the screen.
public void export(ViewGroup view){
view.setDrawingCacheEnabled(true);
view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
Bitmap bitmap = view.getDrawingCache(true);
}

Here I used ScrollView to get the whole view to bitmap
so Here u can use instead of scrollview anyother view group like linerlayout etc..
Bitmap map = loadBitmapFromView(getApplicationContext(),scrollView);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
map.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
//you can create a new file name "test.jpg" in sdcard folder.
File f = new File("/sdcard" +"/" + "mainemailpdf.jpg");
f.createNewFile();
//write the bytes in file
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
bArray = bytes.toByteArray();
// remember close de FileOutput
fo.close();
and for loadBitmapFromView method is:
public static Bitmap loadBitmapFromView(Context context, View v) {
Toast.makeText(context,
v.getMeasuredHeight() + "::::::::::::" + v.getMeasuredWidth(),
Toast.LENGTH_LONG).show();
if (v.getMeasuredHeight() > 0) {
v.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(),
Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0, 0, v.getWidth(), v.getWidth());
v.draw(c);
return b;
}
return null;
}
I hope it helps :)
Any query let me know.

It is not possible since Android system scales down the bitmap.
For ex - if your bitmap size is 480*800 then its size is 480*800*4 = 1536000.
The multiplication with 4 is because each pixel is 4 bytes - RGBA.
Meaning more than a mega and a half for every unscaled image. If the Android won't scale down image you will probably get
OutOfMemoryException after a few image loadings.
as
you have 3 options:
1) view.draw(canvas) you'll get the visible portion of the image(only what is actually being drawn to the screen)
2) getDrawingCache() - will give you the scaled down image.
3) Create custom view which saves the bitmap to the disk and loads it from there when requested

how to take screenshot programmatically and save it on gallery?

i would to know what is the code to take a screenshot of the current screen (after a press of a button) and save it on a gallery because I don't have a device with sd cards. So i would to save in the default gallery. thank you

Bitmap bitmap;
View v1 = findViewById(R.id.rlid);// get ur root view id
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
This should do the trick.
For saving
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();

View v1 = L1.getRootView();
v1.setDrawingCacheEnabled(true);
Bitmap bm = v1.getDrawingCache();
BitmapDrawable bitmapDrawable = new BitmapDrawable(bm);
image = (ImageView) findViewById(R.id.screenshots);
image.setBackgroundDrawable(bitmapDrawable);
For complete source code go through the below blog
http://amitandroid.blogspot.in/2013/02/android-taking-screen-shots-through-code.html
For storing the Bitmap to see the below link
Android Saving created bitmap to directory on sd card

This will save to the gallery. The code also sets an image path.. that is useful with Intent.SEND_ACTION and email Intents.
String imagePath = null;
Bitmap imageBitmap = screenShot(mAnyView);
if (imageBitmap != null) {
imagePath = MediaStore.Images.Media.insertImage(getContentResolver(), imageBitmap, "title", null);
}
public Bitmap screenShot(View view) {
if (view != null) {
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
return bitmap;
}
return null;
}

As 323go commented, this isn't possible unless your device is rooted, really.
But if it is, it might be a good job for monkeyrunner or if you're using an emulator.

How to Save the drawing canvas in android?

I am using this API demo of the Developer site, THIS DEMO.
But i am wonder that how to save that image in to My Andrtoid Device.
Is please anyone give the Code to save that drawn image to the Android Device.
Thanks.

try this code
View content = your_view;
content.setDrawingCacheEnabled(true);
content.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
Bitmap bitmap = content.getDrawingCache();
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File(path+"/image.png");
FileOutputStream ostream;
try {
file.createNewFile();
ostream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 100, ostream);
ostream.flush();
ostream.close();
Toast.makeText(getApplicationContext(), "image saved", 5000).show();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "error", 5000).show();
}

drawView.setDrawingCacheEnabled(true);
Bitmap bm = null;
drawView.destroyDrawingCache();
bm=drawView.getDrawingCache();
Then write the bitmap to file using bitmap factory.

One option is create another Canvas (as shown below) and repeat all your drawing on this new canvas.
Once done, call drawBitmap.
Bitmap bitmap = new Bitmap(// Set the params you like //);
Canvas canvas = new Canvas(bitmap);
// Do all your drawings here
canvas.drawBitmap(// The first picture //);
The best would be if there was a way to copy an existing canvas and then you wont need to re-draw everything but I couldn't find one.

I have implemented the below approach & worked for me.
Get your CustomView by using its id from xml file but not by instantiating the Customview.
View v = findViewById(R.id.custom_view);
//don't get customview by this way, View v = new CustomView(this);
int canvasWidth = v.getWidth();
int canvasHeight = v.getHeight();
Bitmap bitmap = Bitmap.createBitmap(canvasWidth, canvasHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
v.draw(canvas);
ImageView imageView = findViewById(R.id.image_view);
imageView.setImageBitmap(bitmap);
All code should be inside saveButton click listener.