Set the Layout Weight of a Textview Programmatically

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));

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 the layout_weight of a TextView in code?

Firstly, the LayoutParams constructors use pixels (according to the documentation).

To set the layout_weight programmatically, you need to use LinearLayout.LayoutParams. ViewGroup.LayoutParams does not have a third argument, as you pointer out, but the former does.

Try this:

create.setLayoutParams(new LinearLayout.LayoutParams(0, 30, 1.0f));

ViewGroup.LayoutParams is a set of layout parameters for any View within any kind of layout (since these layouts are all ViewGroups). When you have a specific layout, for example a LinearLayout, you can use LinearLayout.LayoutParams to get access to things specific to that type of layout. In this case, the layout_weight is particular to LinearLayouts, therefore you must be using the LinearLayout.LayoutParams to access this weight parameter.

You should also remove the layout_weight="0" from the TextView in your XML. If this still doesn't fix it, give your LinearLayout a background color and see if it's even visible at all, then edit your OP with your findings and any changed/new code.

Set button and textView weight programmatically

I found another way around to accomplish what I wanted, so instead of using weight I used the screen width in order to get a relative width. and to add margin, I just added an empty row before the row that contains the button and text. Here is the full code for the interested.

private fun addRow(content: Editable) {
    val tl = findViewById<TableLayout>(R.id.main_table)
    val margin = TableRow(this)
    val tr_head = TableRow(this)
    margin.id = View.generateViewId()

    tr_head.id = View.generateViewId()
    val tabParams = TableRow.LayoutParams(
        TableRow.LayoutParams.MATCH_PARENT,
        84
    )
    tr_head.setLayoutParams(tabParams)

    val label = TextView(this)
    label.id = View.generateViewId()
    label.text = content
    label.setTextColor(Color.WHITE)
    val displayMetrics = DisplayMetrics()
    windowManager.defaultDisplay.getMetrics(displayMetrics)
    label.width = (displayMetrics.widthPixels / 3)*2
    label.setPadding(50, 0,0,0)
    tr_head.addView(label)

    val btn = Button(this)
    btn.id = View.generateViewId()
    btn.width = (displayMetrics.widthPixels / 3) - 50

    btn.setBackgroundColor(Color.RED)
    btn.setText("Remove")
    btn.setOnClickListener {
        tl.removeView(tr_head)
        tl.removeView(margin)
    }
    label.id = View.generateViewId()

    val filler = TextView(this)
    filler.id = View.generateViewId()

    margin.addView(filler)
    tr_head.addView(btn)
    tl.addView(
        margin,  TableLayout.LayoutParams(
            TableRow.LayoutParams.MATCH_PARENT,
            20
        )
    )
    tl.addView(
        tr_head, tabParams
    )
}

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()

Programmatically create a textview with 0dp and layout weight 1

What I should probably mention, don't know if it makes a difference, is the TableView is within a HorizontalScrollView.

It is a logical error to tell a child view inside a scrolling container to match_parent or fill the available space in any way. A scrolling container, like ScrollView or HorizontalScrollView measures its one-and-only child view as UNSPECIFIED so that the child can grow beyond the parent bound in that one direction (and, thus, be scrollable).

The child of a scrolling container is not given what the "available space" would be for it to fill, and operations like layout weight have no effect if the parent's dimension is not well-defined.

The row should fit in the width of the screen, if the data is smaller than the screen, but if the row won't fit, then the view will be horizontally scrollable.

The functionality you are looking for is fillViewport (docs link), which tells the scrolling container to force the child to match it's size if the measured width (in the horizontal case) is less than the parent. Use this in place of applying a weight.

Setting the layout_weight of the TextView under the TableRow

Thank you everyone!
Finally, I was able to solve my problem by referencing to the following posts.

android: two issues using Tablerow+TextView in Tablelayout

How to make a TableLayout from XML using programmable way ?

Refer below for my working code.

This is where the dynamic adding of rows is done.

TableLayout tl = (TableLayout)findViewById(R.id.table_layout);

private void addTableRow(int resIdTitle, String strValue){

    LayoutInflater inflater = getLayoutInflater();
    TableRow tr = (TableRow)inflater.inflate(R.layout.table_row, tl, false);

    // Add First Column
    TextView tvTitle = (TextView)tr.findViewById(R.id.tvTitle);
    tvTitle.setText(resIdTitle);

    // Add the 3rd Column
    TextView tvValue = (TextView)tr.findViewById(R.id.tvValue);
    tvValue.setText(strValue);

    tl.addView(tr);
}

This is the table_layout.xml

 <?xml version="1.0" encoding="utf-8"?>
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1">
    <TableLayout
      android:id="@+id/table_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:title="@string/strGetParamTitle" 
      android:scrollbars="vertical"       
      android:shrinkColumns="0">
    </TableLayout>
</ScrollView>

And finally the table_row.xml. I've set all the layout_params here.

<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android">
   <TextView  
          android:id="@+id/tvTitle"
          android:paddingRight="3dip"
          android:layout_width="0px"
          android:layout_weight="0.35"/>
   <TextView  android:text=":"
          android:layout_width="0px"
          android:layout_weight="0.05"/>
   <TextView
            android:id="@+id/tvValue"
            android:paddingLeft="3dip"
            android:layout_width="0px"
            android:layout_weight="0.6"
          /> 
</TableRow>

adding the views dynamically with layout weight property in Android

Problem is with your layout params. You need to use like below

   private void addLayout(String textView1Text, String textView2Text, String checkBoxText) {
       LinearLayout.LayoutParams param = new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f);  
       mLinearLayout.setLayoutParams(param);

       TextView tv1 = new TextView(this);
       tv1.setText(textView1Text);
       LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(0, 100);  
       lp.weight =  0.1f;
       tv1.setLayoutParams(lp);
       mLinearLayout.addView(tv1);

       TextView tv2 = new TextView(this);
       tv2.setText(textView2Text);
       LinearLayout.LayoutParams lp1 = new LinearLayout.LayoutParams(0, 100);   
       lp1.weight =  0.6f;
       tv2.setLayoutParams(lp1);
       mLinearLayout.addView(tv2);

       CheckBox cb = new CheckBox(this);
       cb.setText(textView2Text);
       LinearLayout.LayoutParams lp2 = new LinearLayout.LayoutParams(0, 100);  
       lp2.weight =  0.3f;
       cb.setLayoutParams(lp2);
       mLinearLayout.addView(cb);

    }

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);