I want to set the image res/drawable-hdpi/nasa_image.jpg as the wallpaper.
I wrote the following code but it raises the FileNotFoundException.
Uri u1 = Uri.fromFile(new File("res/drawable-hdpi/nasa_image.jpg"));
Uri u2 = Uri.parse("android.resource://com.my.package/drawable/nasa_image.jpg");
Uri u3 = Uri.parse("android.resource://com.my.package/" + R.drawable.nasa_image);
WallpaperManager w = WallpaperManager.getInstance(this);
Bitmap bitmap;
try {
bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(u));
w.setBitmap(bitmap);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
First I tried for u1. It didn't work. Then I searched and found this. I then tried u2 and u3.
I checked the log. Every time it gave the same FileNotFoundException.
How to refer to it? Where am I wrong? Am I taking the wrong root directory?
I think this is a wrong way to do that in android. why don't you use the resource identifier?
ImageView imgView=(ImageView)findViewById(R.id.imageView1);
int id = getResources().getIdentifier(nasa_image, "drawable", getPackageName());
Drawable drawable=res.getDrawable(id);
imgView.setImageDrawable(drawable);
or
ImageView imgView=(ImageView)findViewById(R.id.imageView1);
Drawable drawable= getResources().getDrawable(R.drawable.nasa_image);
imgView.setImageDrawable(drawable);
imgView.setImageDrawable();
Update to convert from drawable to bitmap just use this (assuming that your drawable is an instanceof Bitmapdrawable)
Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();
Use this method if you are not sure about drawable instance
public static Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable)drawable).getBitmap();
}
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
Use this method if you are sure that you the right file path
private Drawable getDrawable(String path) {
File imgFile = new File(path);
if (imgFile.exists()) {
Bitmap bitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
return new BitmapDrawable(resources, bitmap);
}
return null;
}
you can adjust it to return bitmap or drawable according to your issue
You should not include the extention (.jpg)
Use:
Uri.parse("android.resource://" + BuildConfig.APPLICATION_ID + "/drawable/nasa_image");
Try
Uri u1 = Uri.parse("R.drawable.nasa_image");
Related
Basically, I want to take a screenshot of an entire scrollView. I've tried so many methods, but couldn't find the perfect one.
I've tried following:
public void takeScreenShot() {
mbitmap = getBitmapOFRootView();
createImage(mbitmap);
}
public void createImage(Bitmap bmp) {
String path = Environment.getExternalStorageDirectory().toString() + "/screenshot.jpg";
try {
FileOutputStream outputStream = new FileOutputStream(new File(path));
bmp.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public Bitmap getBitmapOFRootView() {
mScrollView.setDrawingCacheEnabled(true);
int totalHeight = mScrollView.getChildAt(0).getHeight();
int totalWidth = mScrollView.getChildAt(0).getWidth();
mScrollView.layout(0,0, totalWidth, totalHeight);
mScrollView.buildDrawingCache(true);
Bitmap b = Bitmap.createBitmap(mScrollView.getDrawingCache());
mScrollView.setDrawingCacheEnabled(false);
return b;
}
This method almost works, but it's just showing me only 2 views and a button, other than that whole screen is black:
my xml contains so many views, it's view hierarchy is something like this:
<ScrollView>
<ConstraintLayout>
<Views>
....
<Views>
</ConstraintLayout>
</ScrollView>
I've referred so many StackOverflow post, but it didn't work.
So can anybody help me with it?
Update:
Finally found a solution for it. So, it was an issue with the background, solved it by drawing canvas over it. Like below:
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null)
bgDrawable.draw(canvas);
else
canvas.drawColor(Color.WHITE);
view.draw(canvas);
return bitmap;
You should be using a canvas for the same
public static Bitmap saveBitmapFromView(View view, int width, int height) {
Bitmap bmp = Bitmap.createBitmap(width , height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
view.layout(0, 0, view.getLayoutParams().width, view.getLayoutParams().height);
view.draw(canvas);
return bmp;
}
Taking and Sharing screenshot in android programmatically
I've searched everywhere but found this one working
takeAndShareScreenshot()
private void takeAndShareScreenshot(){
Bitmap ss = takeScreenshot();
saveBitmap(ss);
shareIt();
}
takeScreenshot()
private Bitmap takeScreenshot() {
View view = // decore view of the activity/fragment;
view.setDrawingCacheEnabled(true);
return view.getDrawingCache();
}
saveBitmap()
private void saveBitmap(Bitmap bitmap) {
// path to store screenshot and name of the file
imagePath = new File(requireContext().getExternalFilesDir(Environment.DIRECTORY_PICTURES) + "/" + "name_of_file" + ".jpg");
FileOutputStream fos;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (IOException e) {
Log.e("GREC", e.getMessage(), e);
}
}
shareIt()
private void shareIt() {
try {
Uri uri = Uri.fromFile(imagePath);
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("image/*");
String shareBody = getString(R.string.share_body_text);
sharingIntent.putExtra(Intent.EXTRA_SUBJECT, R.string.subject);
sharingIntent.putExtra(Intent.EXTRA_TEXT, shareBody);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
} catch (Exception e) {
e.printStackTrace();
}
}
Note:
In recent versions of android (>Marshmallow I guess), you may need `write
access to external directory`
I was searching everywhere, but can't found solution...
I have two xml layouts for share.
I have inflated and assigned to the views correctly.
shareLayout = LayoutInflater.from(getApplicationContext()).inflate(R.layout.share_every_for_self_game_layout, null);
contentView = (LinearLayout) shareLayout.findViewById(R.id.share_container_layout_id);
Problem is that the shared image is always empty.
Here is my code
private void shareResultToFacebook(){
try {
Bitmap bitmap = getBitmapFromView(contentView);
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, getImageUri(this, bitmap));
shareIntent.setType("image/jpeg");
startActivity(Intent.createChooser(shareIntent, getResources().getText(R.string.send_to)));
}catch (Exception e){
e.getMessage();
}
}
//create bitmap from view and returns it
private Bitmap getBitmapFromView(View view) {
try {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
//Define a bitmap with the same size as the view
Bitmap returnedBitmap = Bitmap.createBitmap(800, 600, Bitmap.Config.ARGB_8888);
//Bind a canvas to it
Canvas canvas = new Canvas(returnedBitmap);
//Get the view's background
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null) {
//has background drawable, then draw it on the canvas
bgDrawable.draw(canvas);
} else {
//does not have background drawable, then draw white background on the canvas
canvas.drawColor(Color.WHITE);
}
// draw the view on the canvas
view.draw(canvas);
//return the bitmap
return returnedBitmap;
}catch (Exception e){
Global.logError("getBitmapFromView", e);
}
return null;
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
try {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(),
inImage, "", "");
return Uri.parse(path);
}catch (Exception e){
e.getMessage();
}
return null;
}
I found solution
I have changed my getBitmapFromView method body
private Bitmap getBitmapFromView(LinearLayout view) {
try {
view.setDrawingCacheEnabled(true);
view.measure(View.MeasureSpec.makeMeasureSpec(800, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(600, View.MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.buildDrawingCache(true);
Bitmap returnedBitmap = Bitmap.createBitmap(view.getDrawingCache());
//Define a bitmap with the same size as the view
view.setDrawingCacheEnabled(false);
return returnedBitmap;
}catch (Exception e){
Global.logError("getBitmapFromView", e);
}
return null;
}
And everything works fine ;)
private Bitmap getBitmapFromView(LinearLayout view) {
try {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
//Define a bitmap with the same size as the view
Bitmap returnedBitmap = Bitmap.createBitmap(800, 600, Bitmap.Config.ARGB_8888);
//Bind a canvas to it
Canvas canvas = new Canvas(returnedBitmap);
//Get the view's background
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null) {
//has background drawable, then draw it on the canvas
bgDrawable.draw(canvas);
} else {
//does not have background drawable, then draw white background on the canvas
canvas.drawColor(Color.RED);
}
// draw the view on the canvas
view.draw(canvas);
//return the bitmap
return returnedBitmap;
}catch (Exception e){
// Global.logError("getBitmapFromView", e);
}
return null;
}
I'm attempting to save all of the icons of the packages on a device as a BMP or PNG file by iterating through each package and doing the following.
Drawable icon = getPackageManager().getApplicationIcon(packageInfo);
Bitmap bitmap = Bitmap.createBitmap(icon.getIntrinsicWidth(), icon.getIntrinsicHeight(), Config.ARGB_8888);
try {
out = new FileOutputStream("/storage/sdcard0/images/" + packageInfo.packageName +".png");
bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
} finally {
try{
out.close();
} catch(Throwable ignore) {}
}
This is creating blank images though, how would I change my code to create the actual icon in an image format?
My issue was this if anyone has the same problem, I referenced this answer.
I forgot to check to see if the icon was already an instance of BitmapDrawable. Because it was I could just cast it to a bitmapdrawable and use .getBitmap
if (icon instanceof BitmapDrawable) {
bitmap = ((BitmapDrawable)icon).getBitmap();
}else{
bitmap = Bitmap.createBitmap(icon.getIntrinsicWidth(), icon.getIntrinsicHeight(), Config.ARGB_8888);
}
Below is the code that could cover all the cases.
public static Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if (bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
return Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
return Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
}
I would like to get all the icons of all installed Applications in my Tablet. I know how to get icon and how to view them, but I would like to save each icon in an external file. The part of code used to get icon is given by the code below.
try{
String pkg = "com.app.my";//your package name
Drawable icon = getContext().getPackageManager().getApplicationIcon(pkg);
imageView.setImageDrawable(icon);
}
catch (PackageManager.NameNotFoundException ne)
{
}
Try something like this:
try{
//get icon from package
String pkg = "com.app.my";//your package name
Drawable icon = getContext().getPackageManager().getApplicationIcon(pkg);
imageView.setImageDrawable(icon);
Bitmap bitmap = drawableToBitmap(icon);
//save bitmap to sdcard
FileOutputStream out;
try {
out = new FileOutputStream(Environment.getExternalStorageDirectory()
+ File.separator + "output.png");
bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
} finally {
//close output stream (important!)
try{
out.close();
} catch(Throwable ignore) {}
}
} catch (PackageManager.NameNotFoundException ne) {}
//convert drawable to a bitmap
public static Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable)drawable).getBitmap();
}
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
I have an imageview.
LoaderImageView image=new LoaderImageView(context,path1);
in above statement it returns a imageview. So I want to convert it into a bitmap. How can I convert imageview into bitmap image.
ImageView i=new ImageView(context);
i.setImageBitmap(convertimagetobitmap);
In above statement I have set a bitmap image (converted image) to another imageview.
Take a look this code:
// i is an imageview which you want to convert in bitmap
Bitmap viewBitmap = Bitmap.createBitmap(i.getWidth(),i.getHeight(),Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(viewBitmap);
i.draw(canvas);
That's it, your imageview is stored in bitmap viewBitMap.
Look at:
ImageView.getDrawingCache();
But you have to keep in mind that returned Bitmap won't be the same as you get from resource or file, since Bitmap will depend on display physical properties (resolution, scaling, color deepness and so on).
Check this BitmapFactory
This gets you access to bitmap where view is stored DrawingCache (cash has to be turned on)
Hope this helps!
This will work :
ImageView img;
img.setDrawingCacheEnabled(true);
Bitmap scaledBitmap = img.getDrawingCache();
//Store to tmp file
String extr = Environment.getExternalStorageDirectory().toString();
File mFolder = new File(extr + "/tmpfolder");
if (!mFolder.exists()) {
mFolder.mkdir();
}
String s = "tmp.png";
File f = new File(mFolder.getAbsolutePath(), s);
strMyImagePath = f.getAbsolutePath();
FileOutputStream fos = null;
try {
fos = new FileOutputStream(f);
scaledBitmap.compress(Bitmap.CompressFormat.PNG, 70, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
scaledBitmap.recycle();
} catch (Throwable e) {
}