How to Change Margin of TextView

Question

I have TextView added Programmatically in to LinearLayout and on some external events I want to decrease bottom margin of that TextView to -10, for that I tried following. <

Answer 1

This one is tricky problem, i set margin to textview in a row of a table layout. see the below:

TableLayout tl = new TableLayout(this);
tl.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

TableRow tr = new TableRow(this);        
tr.setBackgroundResource(R.color.rowColor);

LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(4, 4, 4, 4);

TextView tv = new TextView(this);
tv.setBackgroundResource(R.color.textviewColor);
tv.setText("hello");
tr.addView(tv, params);

TextView tv2 = new TextView(this);
tv2.setBackgroundResource(R.color.textviewColor);
tv2.setText("hi");
tr.addView(tv2, params);

tl.addView(tr);
setContentView(tl);

the class needed to import for LayoutParams for use in a table row is :

import android.widget.**TableRow**.LayoutParams;

important to note that i added the class for table row. similarly many other classes are available to use LayoutParams like:

import android.widget.**RelativeLayout**.LayoutParams;

import android.widget.LinearLayout.LayoutParams;

so use accordingly.