Develop Reference

How to refresh layout/context from list adapter (I think this is what i need)

Im having a bug that i cant understand the reason and how to resolve it. I belive that is a problem of layout/view/context refresh but i dont know.
I have a cell from a listView(I prefer recyclerView but the project has years) and in the corner of the cell i have a button to show more options. Programatically it just make an element View.GONE and another element View.VISIBLE.
I will attach code in a moment
To this button i setted too a listener that when i tap on it it do the opposite of below mentioned. It shows some elements and hide an entire LinearLayout from the cell. The elements are showed BUT the LinearLayout keeps on the screen like bugged. If i tap anywhere it disappears and if i try to tap on it it disappears too. Its like the view of that linear got bugged and keep in there like a ghost view. I will shop some pictures.
The cell normally at the beginning: https://imgur.com/1BjK0KP
The cell after i press the entire view to show the LinearLayout at the bottom of the cell: https://imgur.com/eONSptW
The cell after i press the arrow of the corner to hide the LinearLayout. Here it shows the view bugged https://imgur.com/jrT0qxV
The cell after i tap anywhere else https://imgur.com/XD1jN7U
public void expandView(View view){
final View cellView = view;
final LinearLayout editLinear = (LinearLayout) view.findViewById(R.id.cart_edit);
editLinear.setVisibility(View.VISIBLE);
final TextViewFont countText = (TextViewFont) view.findViewById(R.id.itemCount);
countText.setVisibility(View.GONE);
final TextViewFont total = (TextViewFont) view.findViewById(R.id.itemTotal);
final ImageView imageViewArrow = (ImageView) view.findViewById(R.id.cart_edit_image);
imageViewArrow.setImageDrawable(context.getResources().getDrawable(R.drawable.icon_arrow_up));
//notifyDataSetChanged();
imageViewArrow.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
countText.setVisibility(View.VISIBLE);
editLinear.setVisibility(View.GONE);
imageViewArrow.setImageDrawable(context.getResources().getDrawable(R.drawable.icon_arrow_down));
}
});

First of all, you don't need to store context because in View you have the method view.getContext().
I recommend this article:
https://possiblemobile.com/2013/06/context/
On the other hand, ensure that you don't have a ghost view that is overlapping your image view.

Android add a picture in the top right of a button programmatically

I have a button and I want to pro grammatically add a picture of a green tick to the top right button after it has been selected, how would one do that?

First call the relative layout family and using LayoutPram update the position of the picture
ImageView imageView = (ImageView)findViewById(R.id.theImage);
Button myBtn = (Button)findViewById(R.id.myButton);
myBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)imageView.getLayoutParams();
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
imageView.setLayoutParams(params);
}
});
Try this!

Use ImageButton and onClick swap out the image
Its a vague answer but your question is also vague

Android - how to return to original screen view after setContentView(img)

I have written an app which has a screen view containing a thumbnail that I want to expand to full screen view (with pan and zoom) when I click it.
The large view with pan an zoom works fine, but I want to return to the original view when I click the large image.
final TouchImageView imgBig = new TouchImageView(Dashboard.this);
final ImageView img = (ImageView) findViewById(R.id.graph);
final Bitmap bitmap = result.getImage();
img.setImageBitmap(bitmap);
img.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
imgBig.setImageBitmap(bitmap);
imgBig.setMaxZoom(4f);
setContentView(imgBig);
imgBig.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// What do I need to do here to return to original thumbnail screen view?
}
});
}
});
Have tried a number of things without success!

Just the original setContentView(R.layout.main) will set it back.
It might be better to have an ImageView in the layout xml and set its image and show and hide it. Otherwise you are stuck with just one view which may be limiting.
When you do a setContentView its initializing your activity with that content. So if you want to just put something on top of it you could just have a hidden view. In your layout xml code make an image view that sits on top of all the other views. Then set its visibility="gone" so its hidden.
Then in your onClick instead of calling setContentView just set the image bitmap like you do and call imgBig.setVisibility(View.Gone or View.Visible) to show or hide your big image.
Another possibility is to have 2 activities. And call startActivity to show your big image and then finish to go back to the other activity like it was.
Another possibility is to use fragments, but that probably more involved.

How to add an ImageView over a Button

I want to add an ImageView within the onClick() of the Button. But the ImageView should be aligned to the centre of the button.
How can I do this pragmatically?
I'm creating a new instance of the ImageView to be added on top of the View that called it and it's position is equivalent of the View that called it.
How can I get the X and Y coordinates?
EDIT:
#Override
public void onClick(final View v) {
if(v.getWidth() > v.getHeight()) size = v.getHeight();
if(v.getWidth() < v.getHeight()) size = v.getWidth();
RelativeLayout.LayoutParams button = new RelativeLayout.LayoutParams(size,size);
buttonc = new ImageView(getApplicationContext());
buttonc.setBackgroundResource(R.drawable.round);
layout.addView(buttonc,button);
I'm using the above code to attempt to pragmatically set the size of the ImageView to that of the button, and it's working.
As for the coordinates, I still haven't figured it out.
To add clarity: I'm attempting to create a rounded ripple effect over the view that calls it.

I suggest a better solution create an image view before hand place it in the xml as you see fit,at first set its visibility to false .
On click switch its visibilty to true, and the image will appear
This solution is easier than what you are searching.
Feel free to ask questions

to add Imageview
#Override
public void onClick(final View v) {
//LinearLayout
LinearLayout linearLayout= new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
//ImageView
ImageView imageView = new ImageView(this);
//image resource
imageView.setImageResource(R.drawable.specs);
//image position
imageView.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
//adding view to layout
linearLayout.addView(imageView);
//make visible to program
setContentView(linearLayout);
}

Add imageview to layout on specific coordinates

I am dynamically adding ImageViews to layout. Here is the code, which is doing what I want:
setContentView(R.layout.main);
RelativeLayout main = (RelativeLayout) findViewById(R.id.main_view);
ImageView smokeImage = new ImageView(this);
Drawable smoke = getResources().getDrawable(R.drawable.smoke);
smokeImage.setBackgroundDrawable(smoke);
main.addView(smokeImage, 800, 800);
How to add ImageView to specific coordinates? For example. I want it to appear on x=25px and y=43px . Are there any special functions?

The easiest way is to set margins to your image view. You can use create RelativeLayout.LayoutParams, set margins to params
params.setMargins(left, top, right, bottom);
and set params to your image view
smokeImage.setLayoutParams(params);