How to Set Layout_Weight Attribute Dynamically from Code

How to set layout_weight attribute dynamically from 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.

How to set weight attribute dynamically from Kotlin code?

You need to remember that layout parameters are passed from child to parent view. You probably want to change layout_weight of some child of LinearLayout.

In your case you probably want to do something like this

(orangeLineFiveStars.layoutParams as LinearLayout.LayoutParams).weight = newOrangeWeight
(whiteLineFiveStars.layoutParams as LinearLayout.LayoutParams).weight = newWhiteWeight

It may be necessary to also request re-layout

parentLinearLayout.requestLayout()

How to set layout_weight programmatically?

It's under the respective Spec.

cbButtonLayoutParams.RowSpec.weight = 1; //might be Weight in C#
cbButtonLayoutParams.ColumnSpec.weight = 1;

I'm not sure if you want the row weight or the column weight, but that's how you do it for both.

EDIT:

I believe that InvokeSpec() is equivalent to spec(), which means the second parameter should be the weight, as long as both parameters are Int32.

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Also, layout_weight is usually only for when the parent of that element is a LinearLayout. Are you sure that the CheckBox is actually being added to the GridLayout and not a LinearLayout child?

layout_weight programmatically explainedv

It depends on your view if you want to split the view horizontally between them you can use something like this.

TextView secondTV = findViewById(R.id.secondTextView);
TextView firstTV = findViewById(R.id.firstTextView);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT, 3);
LinearLayout.LayoutParams layoutParams1 = new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT, 1);

firstTV.setLayoutParams(layoutParams);
secondTV.setLayoutParams(layoutParams1);

And your layout looks like this

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/firstTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello" />

    <TextView
        android:id="@+id/secondTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/icon"
        android:text="Hello" />

</LinearLayout>

but if you want to split the view vertically you can use something like this.

TextView secondTV = findViewById(R.id.secondTextView);
TextView firstTV = findViewById(R.id.firstTextView);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 3);
LinearLayout.LayoutParams layoutParams1 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 1);

firstTV.setLayoutParams(layoutParams);
secondTV.setLayoutParams(layoutParams1);

And your layout looks like this

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/firstTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello" />

    <TextView
        android:id="@+id/secondTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/icon"
        android:text="Hello" />

</LinearLayout>

android Layout weight programmatically

//set as like this below for different view set different float value.

myview.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,5f));

programmatically code for layout_weight for ImageView in kotlin

Use This:

var params = LinearLayout.LayoutParams(
    LayoutParams.MATCH_PARENT,
    LayoutParams.MATCH_PARENT,
    1.0f
)
imageView1.setLayoutParams(params)

in this line: var param = LinearLayout.LayoutParams(
We are using LinearLayout because your image view is inside a LinearLayout

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