I'm trying to create new LinearLayout with kotlin inside MainActivity.kt
for (i in 0 until tileArr.size){
var tileLayout: LinearLayout = LinearLayout(this)
tileLayout.marginBottom = 10
}
while it throws error Val cannot be reassigned on line: tileLayout.marginBottom = 10
You cannot modify those properties directly, you need to use LayoutParams.
for (i in 0 until tileArr.size){
var tileLayout: ViewGroup = LinearLayout(this)
val params = <Parent ViewGroup Type>.LayoutParams( // if the parent is FrameLayout, this should be FrameLayout.LayoutParams
LinearLayout.LayoutParams.WRAP_CONTENT, // modify this if its not wrap_content
LinearLayout.LayoutParams.WRAP_CONTENT // modify this if its not wrap_content
)
params.setMargins(0, 0, 0, 10) // last argument here is the bottom margin
tileLayout.layoutParams = params
}
Related
So I'm making a gallery like app and it needs some ScrollView and CardView inside it.
This is the screenshot when I put some background in the ImageView
This is how it suppose to look, I have removed the background image here
I have tried to put an ImageView to inside the CardView with a Linear Layout but the Image filled the ScrollView Instead.
fun CreateCardView(ItemCount: Int){
for (i in 1 until ItemCount){
val card_view = CardView(this)
val param = GridLayout.LayoutParams()
param.rowSpec = GridLayout.spec(GridLayout.UNDEFINED, 1f)
param.columnSpec = GridLayout.spec(GridLayout.UNDEFINED, 1f)
card_view.layoutParams = param
val param2 = card_view.layoutParams as GridLayout.LayoutParams
card_view.layoutParams = param2
subLayoutGrid?.addView(card_view)
val linearLayout = LinearLayout(this)
val layoutParams = WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT, // CardView width
WindowManager.LayoutParams.WRAP_CONTENT // CardView height
)
linearLayout.layoutParams = layoutParams
linearLayout.setBackgroundColor(Color.parseColor("#135517"))
card_view.addView(linearLayout)
val imageView = ImageView(this)
val imageParams = WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT
)
imageView.layoutParams = imageParams
imageView.setBackgroundResource(R.drawable.animaleight)
val layout = findViewById<LinearLayout>(finallinearId)
layout.addView(imageView)
}
}
How can i achieve something like on the image 2 using ImageView
I beleive it happens because u set width and height of your cardView as WRAP_CONTENT, and images that u put here is very big, so you should either change the size of images or use fixed size of cardView like 100dp height and 100dp-width, but that is not the best option or you can try to change your xml file, if you will put your xml file I will help you with that.
Also as long as it is LinearLayout try just put to every item "weight" parametr "1"
Here's my code:
val inflater = LayoutInflater.from(this)
val popupView = inflater.inflate(R.layout.small_player, null)
val popupWindow = PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT/*, focusable*/)
popupWindow.elevation = 1.0f
popupWindow.showAtLocation(window.decorView, Gravity.CENTER, 0, window.decorView.height)
val height = popupWindow.contentView.height //returns 0
I also tried with popupView.height but it returns 0 and with popupWindow.contentView.layoutParams.height that returned -1
So how can I get this height?
This is a very common problem, your view isn't on the screen when you are trying to get its height
try this.
val inflater = LayoutInflater.from(this)
val popupView = inflater.inflate(R.layout.small_player, null)
val popupWindow = PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT/*, focusable*/)
popupWindow.elevation = 1.0f
popupWindow.showAtLocation(window.decorView, Gravity.CENTER, 0, window.decorView.height)
popupView.post{
val height = popupWindow.contentView.height
}
also check this for more View's getWidth() and getHeight() returns 0
You can use View.getMeasuredHeight() which gives you the actual height of the view.
The values you're getting now are the numerical representations used for MATCH_PARENT and WRAP_CONTENT
When creating GridView via xml I use the below code, but how could I achieve that programmatically during runtime?
android:layout_height="0dp"
android:layout_weight="1"
Thanks.
use this
GridView YOUR_GRID_VIEW =(GridView )findViewById(R.id.GridView )
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
/*width*/ ViewGroup.LayoutParams.MATCH_PARENT,
/*height*/ 0,
/*weight*/ 1.0f
);
YOUR_GRID_VIEW.setLayoutParams(param);
LayoutParams.MATCH_PARENT is for width, 0 for Height and 1.0f is for weight
If you have layout_weight in xml, that means, that the parent layout of GridView is LinearLayout.
Having a reference to a GridView, that is already attached to view hierarchy, you can simply get LayoutParams of that view, cast it to LinearLayout.LayoutParams and perform necessary changes:
GridView gridView = ...;
LinearLayout.LayoutParams params = gridView.getLayoutParams();
params.weight = 1;
params.height = 0;
gridView.setLayoutParams(params);
Otherwise, if you are constructing GridView from scratch, you should create LinearLayout.LayoutParams on your own:
LinearLayout linearLayout = ...;
GridView gridView = new GridView(context);
LinearLayout.LayoutParams params =
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
/* height */ 0,
/* weight */ 1);
linearLayout.addView(gridView, params);
I am new to Android dev and I'm having trouble trying to set the min height of a it.gmariotti.cardslib.library.view.CardView programmatically. I create a new instance of a CardView and set all the xml elements in code, but it does not affect the cardView. I do not inflate the cardview from xml.
CardView catCard = new CardView(getActivity());
catCard.setBackgroundColor(Color.green(0));
catCard.setMinimumHeight(10);
catCard.setBottom(0);
catCard.setExpanded(false);
CardView extends FrameLayout so you should be able to set LayoutParams. Try something like this :
CardView.LayoutParams layoutParams = (CardView.LayoutParams)
catCard.getLayoutParams();
layoutParams.height = 10;
, dont forget that setting Width is also required.
Or create new LayoutParams like this (not tested) :
CardView catCard = new CardView(getApplicationContext());
// sets width to wrap content and height to 10 dp ->
catCard.setLayoutParams(new CardView.LayoutParams(
CardView.LayoutParams.WRAP_CONTENT, 10));
catCard.setMinimumHeight(10);
myCardView.setLayoutParams(new RelativeLayout.LayoutParams(20, 20));
it depends that your cardview is a child of which layout, in this case it is under Relative Layout
My Solution with margin and it worked perfectly with me
val resources = context.resources // get resources from context
val width: Int = resources.displayMetrics.widthPixels / 3 //get width
val px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2f, resources.displayMetrics).toInt() //set margin
val layoutParams = ViewGroup.MarginLayoutParams(width, ViewGroup.LayoutParams.WRAP_CONTENT)
layoutParams.marginStart = px
layoutParams.marginEnd = px
cardView.layoutParams = layoutParams
How can I set the value for the attribute layout_weight for button in android dynamically from java code ?
You can pass it in as part of the LinearLayout.LayoutParams constructor:
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT,
1.0f
);
YOUR_VIEW.setLayoutParams(param);
The last parameter is the weight.
Use LinearLayout.LayoutParams:
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
params.weight = 1.0f;
Button button = new Button(this);
button.setLayoutParams(params);
EDIT: Ah, Erich's answer is easier!
If you already define your view in your layout(xml) file, only want to change the weight programmatically, this way is better
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)
mButton.getLayoutParams();
params.weight = 1.0f;
mButton.setLayoutParams(params);
new a LayoutParams overwrites other params defined in you xml file like margins, or you need to specify all of them in LayoutParams.
If the constructor with width, height and weight is not working, try using the constructor with width and height. And then manually set the weight.
And if you want the width to be set according to the weight, set width as 0 in the constructor. Same applies for height.
Below code works for me.
LinearLayout.LayoutParams childParam1 = new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam1.weight = 0.3f;
child1.setLayoutParams(childParam1);
LinearLayout.LayoutParams childParam2 = new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam2.weight = 0.7f;
child2.setLayoutParams(childParam2);
parent.setWeightSum(1f);
parent.addView(child1);
parent.addView(child2);
If layoutparams is already defined (in XML or dynamically), Here's a one liner:
((LinearLayout.LayoutParams) mView.getLayoutParams()).weight = 1;
If I someone looking for answer, use this:
LinearLayout.LayoutParams lay = (LinearLayout.LayoutParams) myLayout.getLayoutParams();
lay.weight = 0.5;
If you are initializing your layout from xml file, this will be much more convenient than providing new layout parameters for Linear Layout.
Any of LinearLayout.LayoutParams and TableLayout.LayoutParams worked for me, for buttons the right one is TableRow.LayoutParams. That is:
TableRow.LayoutParams buttonParams = new TableRow.LayoutParams(
TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT, 1f);
About using MATCH_PARENT or WRAP_CONTENT be the same.
If you have already defined your view in layout(xml) file and only want to change the weight pro grammatically, then then creating new LayoutParams overwrites other params defined in you xml file.
So first you should use "getLayoutParams" and then setLayoutParams
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mButton.getLayoutParams();
params.weight = 4f;
mButton.setLayoutParams(params);
I have done my task by adding this line of code!
LinearLayout.LayoutParams mylayout = (LinearLayout.LayoutParams)
myview.getLayoutParams();
mylayout.weight = 2;
myview.setLayoutParams(mylayout);
Using Kotlin you can do something like:
import android.content.Context
import android.support.v4.content.ContextCompat
import android.support.v7.widget.CardView
import android.widget.*
import android.widget.LinearLayout
class RespondTo : CardView {
constructor(context: Context) : super(context) {
init(context)
}
private fun init(context: Context) {
val parent = LinearLayout(context)
parent.apply {
layoutParams = LinearLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT, 1.0f).apply {
orientation = LinearLayout.HORIZONTAL
addView(EditText(context).apply {
id = generateViewId()
layoutParams = LinearLayout.LayoutParams(0,
LinearLayout.LayoutParams.WRAP_CONTENT, 0.9f).apply {
}
})
addView(ImageButton(context).apply({
layoutParams = LinearLayout.LayoutParams(0,
LinearLayout.LayoutParams.WRAP_CONTENT, 0.1f)
background = null
setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_save_black_24px))
id = generateViewId()
layoutParams = RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT).apply {
addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
// addRule(RelativeLayout.LEFT_OF, myImageButton.id)
}
}))
}
}
this.addView(parent)
}
}
if you want to set weight to LinearLayout then use code mentioned below or set weight to Relative Layout then replace it with Relative Layout
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT,
1.0f
);
YOUR_VIEW.setLayoutParams(param);
You can try this approach.
First, you get the LayoutParams associated with this Button. Perform a type conversion.
LinearLayout.LayoutParams linearLayoutParams = (LinearLayout.LayoutParams) button.getLayoutParams();
Then assign the required value of the "weight" parameter.
linearLayoutParams.weight = 5;
Redraw the layout.
button.requestLayout();