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.

LinearLayout.LayoutParams lastTxtParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); lastTxtParams.setMargins(0, 0, 0, -10); mOldTextView.setLayoutParams(lastTxtParams); mOldTextView.invalidate(); 

Is the right way of modifying Margin of widget that has been added to View?
Some how it is not working.

Answer 1

TextView forgot_pswrd = (TextView) findViewById(R.id.ForgotPasswordText); forgot_pswrd.setOnTouchListener(this);      LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); llp.setMargins(50, 0, 0, 0); // llp.setMargins(left, top, right, bottom); forgot_pswrd.setLayoutParams(llp); 

I did this and it worked perfectly. Maybe as you are giving the value in -ve, that's why your code is not working. You just put this code where you are creating the reference of the view.

Answer 2

Your layout in xml probably already has a layout_margin(Left|Right|etc) attribute in it, which means you need to access the object generated by that xml and modify it.

I found this solution to be very simple:

ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) mTextView         .getLayoutParams();  mlp.setMargins(adjustmentPxs, 0, 0, 0);  break; 

Get the LayoutParams instance of your textview, downcast it to MarginLayoutParams, and use the setMargins method to set the margins.