Develop Reference

How To Capture full ScreenShot of an Activity in Android?

In my Application, I can only capture VISIBLE regions but Scrolling regions are not displaying in Captured Image. For it I did,
private void saveBitmap(Bitmap bitmap) {
shopPath = new File(Environment.getExternalStorageDirectory() + "/Shopping_List.png");
FileOutputStream fos;
try {
fos = new FileOutputStream(shopPath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.e("FileException", e.getMessage(), e);
} catch (IOException e) {
Log.e("InputException", e.getMessage(), e);
}
}
private Bitmap takeScreenshot() {
View rootView = findViewById(android.R.id.content).getRootView();
rootView.setDrawingCacheEnabled(true);
return rootView.getDrawingCache();
}
It only taking VISIBLE shot but not Full activity.. which are beyond the screen.. Please Help me.. Thank you in Advance.

view.measure(MeasureSpec.makeMeasureSpec(
MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(),
view.getMeasuredHeight());
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bm = Bitmap.createBitmap(view.getMeasuredWidth(),
webView.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas bigcanvas = new Canvas(bm);
view.draw(bigcanvas);
I Just Tried this it works... its not the same code but you get the idea.. oyu can now use the bitmap!!

Take screenshot of surface view is not working in android

In my android app i have surface view on which i have canvas and user can draw on canvas.Now i want to capture canvas image and store it to sd card.
Below is my code -
Bitmap bitmap = Bitmap.createBitmap(maxX, maxY, Bitmap.Config.RGB_565);
canvas.setBitmap(bitmap);
String mFile = path+"/drawing.png";
Bitmap bitmap = drawBitmap();
File file = new File(mFile);
FileOutputStream fos = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 100, fos);
fos.flush();
fos.close();
code is run but when i open sd card on image path file with name is created but when open image it is black.
How to capture image from canvas in android.

Just pass the your surface view object and file path where you want to store your snapshot. It is working perfectly.
public static void takeScreenshot(View view, String filePath) {
Bitmap bitmap = getBitmapScreenshot(view);
File imageFile = new File(filePath);
imageFile.getParentFile().mkdirs();
try {
OutputStream fout = new FileOutputStream(imageFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fout);
fout.flush();
fout.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static Bitmap getBitmapScreenshot(View view) {
view.measure(MeasureSpec.makeMeasureSpec(view.getWidth(), MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(view.getHeight(), MeasureSpec.EXACTLY));
view.layout((int)view.getX(), (int)view.getY(), (int)view.getX() + view.getMeasuredWidth(), (int)view.getY() + view.getMeasuredHeight());
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
view.setDrawingCacheEnabled(false);
return bitmap;
}

Android App Creates Incomplete Images

I'm developing an app that combines two bitmaps, where one bitmap is from drawable, and the other is taken from a camera snapshot. However the pictures always end up incomplete. Half the picture is fine, but the other half is gray. Is there a way to make sure that the file is completed before the app moves on with the code? Below is the code that works with writing and saving the file. Thanks
Combine.java
protected void createPostcard(byte[] data, File pictureFile, CameraActivity app, Button shareButton,
Button newButton) {
try {
Bitmap photo = BitmapFactory.decodeByteArray(data, 0, data.length);
Bitmap splash = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(app.getResources(),
R.drawable.wishsplash), photo.getWidth(), photo.getHeight(), false);
Bitmap postcard = Bitmap.createBitmap(photo.getWidth(), photo.getHeight(), photo.getConfig());
Canvas canvas = new Canvas(postcard);
canvas.drawBitmap(photo, new Matrix(), null);
canvas.drawBitmap(splash, 0, 0, null);
savePostcard(postcard, pictureFile, app, shareButton, newButton);
} catch (Exception e) {
}//end catch
}//end createPostcard
/**
* Saves the postcard
*/
private void savePostcard(Bitmap postcard, File pictureFile, CameraActivity app, Button shareButton,
Button newButton) {
BitmapDrawable mBitmapDrawable = new BitmapDrawable(postcard);
Bitmap mNewSaving = mBitmapDrawable.getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
mNewSaving.compress(CompressFormat.JPEG, 100, stream);
byte[] byteArray = stream.toByteArray();
save(byteArray, pictureFile, app);
shareButton.setBackgroundResource(R.drawable.sharebutton);
newButton.setBackgroundResource(R.drawable.newbutton);
shareButton.setEnabled(true);
newButton.setEnabled(true);
}//end savePostcard
/**
* Check if external is available. If not, postcard will be saved in internal.
* #retun
*/
private void save(byte[] data, File pictureFile, CameraActivity app) {
try {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
FileOutputStream fos = new FileOutputStream(pictureFile);
imageUri = Uri.fromFile(pictureFile);
fos.write(data);
imageFile = pictureFile;
fos.close();
app.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,
Uri.parse("file://"+ Environment.getExternalStorageDirectory())));
} else {
File cache = app.getCacheDir();
File internalPic = new File(cache, pictureFile.getName());
FileOutputStream fos = new FileOutputStream(internalPic);
imageUri = Uri.fromFile(internalPic);
imageFile = internalPic;
fos.write(data);
fos.close();
}//end else
} catch (FileNotFoundException e) {
System.out.println("FILENOTFOUND");
} catch (IOException e) {
System.out.println("IOEXCEPTION");
}//end catch
}//end getStorage

try this code
public Bitmap PutoverBmp(Bitmap all, Bitmap scaledBorder) {
Paint paint = new Paint();
final int width = bmp.getWidth(); // bmp is your main Bitmap
final int height = bmp.getHeight();
patt = Bitmap.createScaledBitmap(bmp, width, height, true);
Bitmap mutableBitmap = patt.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(mutableBitmap);
scaledBorder = Bitmap.createScaledBitmap(border, width, height, true);
paint.setAlpha(100);
canvas.drawBitmap(scaledBorder, 0, 0, paint);
return mutableBitmap;
}
simply call this Bitmap combine = (bmp , yourOtherBitmap);

imageview DrawingCache returns null

i'm using DrawingCache but it gives me NullPointerException
my code is as below:
myImageView.setDrawingCacheEnabled(true);
myImageView.buildDrawingCache();
resized = myImageView.getDrawingCache();
btnSave.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String save_location = Environment
.getExternalStorageDirectory().getAbsolutePath()
+ "/EditedImage";
File dir = new File(save_location);
if (!dir.exists())
dir.mkdirs();
File f = new File(dir, TEMP_PHOTO_FILE);
FileOutputStream out;
try {
out = new FileOutputStream(f);
resized.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
error is at onClick.
my logcat is
what is missing in this?

Try this examle:
myImageView.setDrawingCacheEnabled(true);
myImageView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
myImageView.layout(0, 0, v.getMeasuredWidth(), myImageView.getMeasuredHeight());
myImageView.buildDrawingCache(true);
Bitmap b = Bitmap.createBitmap(myImageView.getDrawingCache());
myImageView.setDrawingCacheEnabled(false); // clear drawing cache
Updated:
Another way, you can create a Canvas for the Bitmap and then call view.draw(canvas) like:
public static Bitmap loadBitmapFromView(View v) {
Bitmap b = Bitmap.createBitmap( v.getLayoutParams().width, v.getLayoutParams().height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height);
v.draw(c);
return b;
}

Each view will take some procedure, for example, measure and layout, before it is drew on screen. So when you invoke getDrawingCache() in Activity.onCreate(), the view is not drew yet.
Put the following two lines in your onclick method.
myImageView.buildDrawingCache();
resized = myImageView.getDrawingCache();

Saving Android SurfaceView to Bitmap and some elements are missing

I have my SurfaceView up and running with a button to open the camera and take a picture which is used as the background and another button to add items that sit on top and can be moved around. This all works fine until I try to save the SurfaceView as a Bitmap when all I get is the background and none of the images on top.
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(_mGotImage){
canvas.drawBitmap(_mImage, 0, 0, null);
}else{
canvas.drawColor(Color.BLACK);
}
//if the array is not empty
if(!_mJazzItems.isEmpty()){
//step through each item in the array
for(JazzItem item: _mJazzItems){
//get the bitmap it is using
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), item.getBitmap());
//and draw that bitmap at its X and Y coords
canvas.drawBitmap(bitmap, item.getX(), item.getY(), null);
}
}
}
This is the method called to try and save the Canvas.
public void screenGrab(){
Bitmap image = Bitmap.createBitmap(_mPanelWidth, _mPanelHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(image);
this.onDraw(canvas);
String path=Environment.getExternalStorageDirectory() + "/test2.png";
File file = new File(path);
try{
file.createNewFile();
FileOutputStream ostream = new FileOutputStream(file);
image.compress(CompressFormat.PNG, 100, ostream);
ostream.flush();
ostream.close();
}catch (Exception e){
e.printStackTrace();
}
}
The onDraw works fine, I get my camera shot in the background and can add all my items over the top and move them around. Just when I try to get a screen shot, none of the items on top are present.
Thanks for any help!!
-- UPDATE --
I have modified the screen grab method to this:
public void screenGrab(){
Bitmap image = Bitmap.createBitmap(_mPanelWidth, _mPanelHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(image);
canvas.drawBitmap(_mImage, 0, 0, null);
//if the array is not empty
if(!_mJazzItems.isEmpty()){
//step through each item in the array
for(JazzItem item: _mJazzItems){
//get the bitmap it is using
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), item.getBitmap());
//and draw that bitmap at its X and Y coords
canvas.drawBitmap(bitmap, item.getX(), item.getY(), null);
}
}
String path=Environment.getExternalStorageDirectory() + "/test2.png";
File file = new File(path);
try{
file.createNewFile();
FileOutputStream ostream = new FileOutputStream(file);
image.compress(CompressFormat.PNG, 100, ostream);
ostream.flush();
ostream.close();
}catch (Exception e){
e.printStackTrace();
}
}
I can't see why this is not drawing the other images over the top...

in my case i am using this:
public static Bitmap combineImages(Bitmap c, Bitmap overLayImage, Context con) {
Bitmap cs = null;
int width, height = 0;
width = c.getWidth();
height = c.getHeight();
cs = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas comboImage = new Canvas(cs);
comboImage.drawBitmap(c, 0, 0, null);
String left = yourleftPosition;
String top = yourtopPosition;
comboImage.drawBitmap(overLayImage, Float.parseFloat(left), Float.parseFloat(top),null);
/******
*
* Write file to SDCard
*
* ****/
String tmpImg = String.valueOf(System.currentTimeMillis()) + ".png";
OutputStream os = null;
try {
String pathis = Environment.getExternalStorageDirectory()
+ "/DCIM/Camera/" + tmpImg;
os = new FileOutputStream(pathis);
cs.compress(CompressFormat.PNG, 100, os);
}
catch (IOException e) {
Log.e("combineImages", "problem combining images", e);
}
return cs;
}