Develop Reference

Add View programmatically and after adding on button click change view background

Add View dynamically in LinearLayout and after adding View change any View background on the click button.
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(width, height);
ImageView img1 = new ImageView(this);
img1.setLayoutParams(layoutParams);
img1.setImageBitmap(icon);
llLayout.addView(img1);
ImageView img2 = new ImageView(this);
img2.setLayoutParams(layoutParams);
img2.setImageBitmap(icon);
llLayout.addView(img2);
ImageView img3 = new ImageView(this);
img3.setLayoutParams(layoutParams);
img3.setImageBitmap(icon);
llLayout.addView(img3);
On button, click change all imageview background or particular ImageView.
Note : llLayout is my linear layout this layout adding in XML

when you are adding imageView into linear layout, at that time you are setImageBitmap to imageView.
if you want to reset Image to Imageview, you should use img1.setImageResource
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//use anyone as your requirement
img1.setBackgroundResource(); // for set background resource from drawable folder(for src)
img1.setBackground();// for set background(Drawable)(for background)
img1.setBackgroundColor(); //for set background color(for background)
}
});

I am not sure if I understand the question correctly, but If you mean change specific image background with onClick event on a button .. If you have the image reference change it .. but if you mean you are adding the image view dynamically like inside for loop and you don't have the reference you can create Arraylist and add the added images into it then loop on this arraylist to change all the images background or filter the specific image you want to change

Create multiple imageviews in edittext

So it's challenging for me to create multiple imageviews in edittext and then assign images to it from gallery or camera and then save these images in the database and retrieve it in the same position in my edittext. So what I did is that I created ImageView below EditText but that is what I don't want. I also tried Drawable in Spannable of EditText which works good in creating multiple images inside EditText but then the problem is that I cant save these images in the database and retrieve these to show in the same position as these are part of my EditText. I am saving my EditText in html form in the database.
please tell me some solution about this challenging work. Thanks
The first approach is to create Drawable for multiple images but it is part of EditText and cant save these images in the database and retrieve them in the same positions.
private void setImageinText(Bitmap myBitmap){
myBitmap = Util.scaleBitmapToFitWidth(myBitmap, 1360, true);
imageView.setImageBitmap(myBitmap);
Drawable d = imageView.getDrawable();
SpannableString ssd = new SpannableString("\n \n");
d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);
ssd.setSpan(span, 1 , 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
texto.setTransformationMethod(null);
texto.getText().insert(texto.getSelectionStart(), ssd);
}
Other approach is to create imageview in layout and assign image from gallery but i can save only one image in it and the imageview position is fixed.
if (requestCode == GALLERY) {
if (data != null) {
Uri contentURI = data.getData();
try {
bp = MediaStore.Images.Media.getBitmap(context.getContentResolver(), contentURI);
imageView.setImageBitmap(bp);
imageView.setVisibility(View.VISIBLE);
photo= Util.getBytes(bp);
} catch (IOException e) {
e.printStackTrace();
}
}

How Native Extension take screenshot on Android device?

I have a Adobe Air application that intend to take a screenshot with Native Extension on Android device, but the java code returns a black image.
public FREObject call(FREContext context, FREObject[] params) {
View view = context.getActivity().getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap image = view.getDrawingCache();
}
I don't know much about Adobe Air. My java code runs exactly on Android Java Application, but returns black image on Adobe Air Android Application with Native Extension.
Is there any solution or any way to take a screenshot using Java in NativeExtension?
Thanks much!

Could be that you are not getting the correct view. Try this to get the topmost root view.
public FREObject call(FREContext context, FREObject[] params)
{
View view = findViewById(android.R.id.content).getRootView();
view.setDrawingCacheEnabled(true);
Bitmap image = view.getDrawingCache();
if(image == null)
{
System.out.println("Image returned was null!");
}
}
I also removed the buildDrawingCache() line; that can sometimes cause issues, and from what I've read it's not completely necessary.
Finally you'll want to check if the bitmap being returned is null. If so that could be why it's all black.

You can take a screenshot like this and save it to the SD card:
View content = findViewById(R.id.layoutroot);
content.setDrawingCacheEnabled(true);
Function to get the rendered view:
private void getScreen()
{
View content = findViewById(R.id.layoutroot);
Bitmap bitmap = content.getDrawingCache();
File file = new File( Environment.getExternalStorageDirectory() + "/asdf.png");
try
{
file.createNewFile();
FileOutputStream ostream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 100, ostream);
ostream.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
You have to add this permission to your AndroidManifest (if you want to save it):
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Image caching not in List View android

Hi guys i am stuck with image caching. i need to populate Linear Layout with images from web.
I was searching examples how to cache images in android and found these examples:
http://developer.android.com/resources/samples/XmlAdapters/src/com/example/android/xmladapters/ImageDownloader.html
Lazy load of images in ListView
I tried it implement for my code.
String picPath = "https://www.google.lt/logos/classicplus.png";
try {
/*
View v = null;//new View(this);
ImageLoader loader = new ImageLoader(this);
ImageView im = (ImageView)this.findViewById(R.id.image);
loader.DisplayImage(picPath, im);
addImage( im);*/
LayoutInflater inflater =(LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View convertView = inflater.inflate(R.layout.item, null);
ImageView image = (ImageView)convertView.findViewById(R.id.image);
ImageDownloader down = new ImageDownloader();
down.download(picPath, image);
addImage(image);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
public void addImage( View view){
LinearLayout pubLayout = (LinearLayout)findViewById( R.id.scrollerLinearlayout);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
//setting layout_margin
params.setMargins(15, 30, 15, 30);
pubLayout.addView(view,params);
}
However this didn't worked. I believe because i add view to linear layout and when image is downloaded it can't repaint it ?
There are examples how to do image caching using ListView. But what to do if i am not using List View.
I would write my own caching but how to make callback to image downloaded as i want first add image to layout and on callback update it ?
Thanks.

you have to call invalidate on parent view
pubLayout.getParent().invalidate();

Create NinePatch at Runtime

I have a business need to create the NinePatchDrawable objects at runtime, this is, an exterior .png image is received from a server and it has to be applied in a button's background (for example) as a nine patch.
I have tried to create the NinePatchDrawable object, but the constructor asks me for a "byte[] chunck" that describes the patch. The thing is, I have no idea on how to build this chunk from a bitmap that does not have the 9patch information in it.
Any ideas on this topic? Am I seeing the problem from a wrong perspective?

See my answer for Create a NinePatch/NinePatchDrawable in runtime
I develop a tool to create NinePatchDrawable from (uncompiled) NinePatch bitmap.
See https://gist.github.com/knight9999/86bec38071a9e0a781ee .
The method
NinePatchDrawable createNinePatchDrawable(Resources res, Bitmap bitmap)
helps you.
For example,
ImageView imageView = (ImageView) findViewById(R.id.imageview);
Bitmap bitmap = loadBitmapAsset("my_nine_patch_image.9.png", this);
NinePatchDrawable drawable = NinePatchBitmapFactory.createNinePatchDrawable(getResources(), bitmap);
imageView.setBackground( drawable );
where
public static final Bitmap loadBitmapAsset(String fileName,Context context) {
final AssetManager assetManager = context.getAssets();
BufferedInputStream bis = null;
try {
bis = new BufferedInputStream(assetManager.open(fileName));
return BitmapFactory.decodeStream(bis);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
bis.close();
} catch (Exception e) {
}
}
return null;
}
In this case, the my_nine_patch_image.9.png is under the assets directory.

I've answered this over at question 5519768. Keep in mind the differences between "source" and "compiled" ninepatch images.