Set the layout weight of a TextView programmatically

You have to use TableLayout.LayoutParams with something like this:

TextView tv = new TextView(v.getContext());tv.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));

The last parameter is the weight.

The answer is that you have to use TableRow.LayoutParams, not LinearLayout.LayoutParams or any other LayoutParams.

TextView tv = new TextView(v.getContext());LayoutParams params = new TableRow.LayoutParams(0, LayoutParams.WRAP_CONTENT, 1f);tv.setLayoutParams(params);

The different LayoutParams are not interchangeable and if you use the wrong one then nothing seems to happen. The text view's parent is a table row, hence:

http://developer.android.com/reference/android/widget/TableRow.LayoutParams.html

In the earlier answers weight is passed to the constructor of a new SomeLayoutType.LayoutParams object.Still in many cases it's more convenient to use existing objects - it helps to avoid dealing with parameters we are not interested in.

An example:

// Get our View (TextView or anything) object:View v = findViewById(R.id.our_view); // Get params:LinearLayout.LayoutParams loparams = (LinearLayout.LayoutParams) v.getLayoutParams();// Set only target params:loparams.height = 0;loparams.weight = 1;v.setLayoutParams(loparams);