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

User · Answer

You were probably changing the layout margin after it has been drawn  mOldTextView invalidate   is useless  you needed to call requestLayout   on the parent to relayout the new configuration  When you moved the layout changing code before the drawing took place  everything worked fine

User · Answer

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

User · Answer

TextView tv    TextView findViewById R id item title            RelativeLayout LayoutParams mRelativelp    RelativeLayout LayoutParams  tv                      getLayoutParams            mRelativelp setMargins DptoPxConvertion 15   0  DptoPxConvertion  15   0           tv setLayoutParams mRelativelp        private int DptoPxConvertion int dpValue               return  int   dpValue   mContext getResources   getDisplayMetrics   density    0 5           getLayoutParams   of textview should be casted to the corresponding Params based on the Parent of the textview in xml     lt RelativeLayout gt      lt TextView     android id    id item title  gt   lt  RelativeLayout gt    To render the same real size on different devices use DptoPxConvertion   method which I have used above  setMargin left top right bottom  params will take values in pixel not in dp  For further reference see this Link Answer

User · Answer

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

User · Answer

setMargins   sets the INNER margins of the TextView  not the layout-margins  Is that what you want to do  This two different margins can be quite complicated   If you want to set the layout margins  change the LayoutParams of the TextView  textview getLayoutParams    then change the parameters on the returned LayoutParams object    You don t need to change anything on your LinearLayout   Regards  Oliver

User · Answer

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

User · Answer

TextView does not support setMargins  Android docs say      Even though a view can define a padding  it does not provide any support for margins  However  view groups provide such a support  Refer to ViewGroup and ViewGroup MarginLayoutParams for further information

User · Answer

Here is another approach     When I ve got to the same problem  I didn t like the suggested solutions here  So  I ve come up with another way  I ve inserted a TextView in the XML file between the two fields I wanted to separate with two important fields    visibility set to  GONE   doesn t occupy any space    height is set to whatever I needed the separation to be   XML       some view up here  lt TextView     android id    id dialogSeparator      android layout width  match parent      android layout height  30dp      android visibility  gone   gt       some view down here    Now  I the code  all I needed to do it simple change the visibility to invisible  i e  it s there  and taking the needed space  but it s unseen       JAVA       TextView tvSeparator    TextView activity findViewById R id dialogSeparator       tvSeparator setVisibility View INVISIBLE         Inside an activity extended class I can use  this  instead of  activity     Viola   I got the needed margin  BTW  This solution is for LinearLayout with vertical orientation  but you can do it with different layouts   Hope this helps

[android] How to Change Margin of TextView

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