Develop Reference

setPadding() on Button programmatically not working

When I set padding on a button using XML it works without problems.
XML for the button:
<Button
android:id="#+id/comment_video"
android:layout_below="#+id/input_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/comment_video"
android:textColor="#android:color/white"
android:backgroundTint="#color/colorAccent"
android:layout_alignParentEnd="true"
android:textSize="14sp"
android:padding="10dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="10dp"
android:visibility="gone"/>
Screenshot of button:
Then when I do it programmatically it's not working.
Code for the button:
// Add reply button
final Button replyButton = new Button(mContext);
replyButton.setId(170000 + i2);
replyButton.setText("REPLY");
replyButton.setTextColor(Color.parseColor("#FFFFFF"));
replyButton.setBackgroundColor(Color.parseColor("#C70000"));
replyButton.setPadding(dp10_in_px, dp10_in_px, dp10_in_px, dp10_in_px);
replyButton.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
replyButton.setVisibility(View.GONE);
RelativeLayout.LayoutParams lp8 = new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
lp8.addRule(RelativeLayout.BELOW, textInputLayout.getId());
lp8.addRule(RelativeLayout.ALIGN_PARENT_END, relativeLayout3.getId());
lp8.setMargins(0, dp4_in_px, dp10_in_px, dp10_in_px);
replyButton.setLayoutParams(lp8);
Screenshot of button:
I set thousands of views dynamically based on YouTube data and must do it programmatically, at least as far as I know.
The formula used for variables in setPadding and setMargin are as follows:
int dp4 = 4; // 4 dps
final float scale = getResources().getDisplayMetrics().density;
int dp4_in_px = (int) (dp4 * scale + 0.5f);
int dp10 = 10; // 10 dps
int dp10_in_px = (int) (dp10 * scale + 0.5f);
Any help is appreciated.
Update 1 - Screenshot of layout bounds
Update 2 - Sharp corners
Another small detail that might be a clue. The corners on the programmatically made button is sharp. Normally they're a bit rounded.

OK, with help from war_Hero in comments I've found the solution.
setBackgroundColor() don't work. It sets the entire background, including the padding, to the same color.
This:
replyButton.setBackgroundColor(Color.parseColor("#C70000"));
Should be replaced with something like this:
replyButton.getBackground().setColorFilter(ContextCompat.getColor(mContext, R.color.colorAccent), PorterDuff.Mode.MULTIPLY);

Try this:
replyButton.setPadding(dp10_in_px, dp10_in_px, dp10_in_px, dp10_in_px);
you should replace line something like this
replyButton.setPadding(0,padding,0,0);

programmatically bottom margin to ImageView not working

marginBottom not working. It works but the margin is only a few space regardless of how much margin is applied. Why?
Java-code :
LinearLayout onepage= (LinearLayout) findViewById(R.id.onepage);
RelativeLayout bluegreen = new RelativeLayout(this);
p_ll = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
bluegreen.setLayoutParams(p_ll);
//some other views that make up the whole page
//bottom most image
ImageButton migs = new ImageButton(this);
p_rl = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
p_rl.addRule(RelativeLayout.CENTER_HORIZONTAL);
p_rl.setMargins(0, 0, 0, 20);
register.setLayoutParams(p_rl);
register.setImageResource(R.drawable.migs);
register.setPadding(0, 0, 0, 0);
bluegreen.addView(migs);
onepage.addView(bluegreen);
XML:
<LinearLayout
android:id="#+id/onepage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".PageActivity" >
</LinearLayout>

Have you notice that in setMargins method parameters are in pixel and not in dp? take a look at android doc page
So depending of your device screen size but 20 px can be very small.
Don't forget to call requestLayout() to take in account margin changes.

ImageView.ScaleType.FitXY not works in code

I don't know why scaleType not works for this ImageView. widthGrayBlock is correct, I checked it with black background. ImageView has correct width and height but image resource doesn't fit it. Thank you.
ImageView gray = new ImageView(mParentActivity);
gray.setScaleType(ImageView.ScaleType.FIT_XY);
gray.setAdjustViewBounds(true);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
widthGrayBlock, LayoutParams.WRAP_CONTENT);
params.setMargins(marginLeft, 0, 5, 0);
progressLayout.addView(gray, 1, params);
gray.setImageResource(R.drawable.schedule_bar_gray);
//gray.setBackgroundColor(Color.BLACK);

Try this in your xml
android:scaleType="fitXY"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
it's worked for me when i had a problem.

How to set a desired layout for an animating fragment?

I have a fragment which is animating from right to left. I want to set it to stop at like 100 units from the left part of the screen. This is what i did so far.
RelativeLayout tempLi;
Display display = MyActivity.context.getWindowManager().getDefaultDisplay();
final int width = display.getWidth();
tempLi.setLayoutParams(new LayoutParams(width-100, LayoutParams.FILL_PARENT));
This line of code is getting the layout 100 units short from the right side. I tried doing -width + 100 , it didn't work.
Any suggestions will be appreciated. TIA

You can set the left-margin to the layout as follows:
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
layoutParams.setMargins(100, 0, 0, 0);
tempLi.setLayoutParams(layoutParams);

MarginLayoutParams.setMargins() is not working?

Here's the thing: I want to add some images programmatically. The images should have to have a topMargin of 5dip except for the first image, in a LinearLayout with a vertical orientation manner. below the code segment:
LinearLayout body = (LinearLayout) findViewById(R.id.body);
for (int i = 1; i <= 4; i++) {
ImageView img = new ImageView(this);
MarginLayoutParams lp = new MarginLayoutParams(-2, -2);
img.setImageResource(R.drawable.image);
if (i != 1) {
lp.setMargins(0, 5, 0, 0);
}
img.setLayoutParams(lp);
body.addView(img);
body.requestLayout();
}
By running the program I can see the the 4 images(here) vertically aligned one by one but there is no topMargin(as in the code,5dip). body is the id of the LinearLayout. here's the XML segment to:
<LinearLayout
android:id="#+id/body"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#901b0e08"
android:orientation="vertical"
android:paddingLeft="6dp"
android:paddingRight="8dp" >
</LinearLayout>
I cant get what went wrong here.
Thanks.

Try changing your MarginLayoutParams to this:
LayoutParams lp = new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT );
The reason for doing this, is that body is a LinearLayout and thus you would want to use the LinearLayout-specific LayoutParams.

Try to set padding but margin for ImageView. Sometimes it works fine. Your can directly set padding size to ImageView w/o declare LayoutParams.

You probably need to set LayoutParams' gravity property, for example:
lp.gravity = 0; //AXIS_X_SHIFT
That's what works fine for me.