layout margin for text view programmatically

Question

如果我使用xml文件，我有一个名为layout_margin的选项（例如layout_margin =“1dp”用于文本视图），但我想以编程方式设置，我不知道该怎么做。

Answer 1

   LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)textview.getLayoutParams();
     params.setMargins(20, 0, 0, 0); 
     textview.setLayoutParams(params);

Answer 2

Please Google before adding your question to StackOverflow.

TextView tv = (TextView)findViewById(R.id.my_text_view);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)tv.getLayoutParams();
params.setMargins(0, 0, 10, 0); //substitute parameters for left, top, right, bottom
tv.setLayoutParams(params);

Answer 3

You can do by this:

TextView text = (TextView) findViewById(R.id.text);   
LinearLayout.LayoutParams params= new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(left, top, right, bottom);//pass int values for left,top,right,bottom
text.setLayoutParams(params);

Answer 4

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

Answer 5

Note, that not all LayoutParams has method setMargins();

RelativeLayout, LinearLayout etc has their own inner class LayoutParams, so availability of setMargins is not always available.

Answer 6

Try This : It worked ....

LinearLayout.LayoutParams Params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WrapContent, LinearLayout.LayoutParams.WrapContent);

Params.SetMargins(0, 10, 0, 0);

FirstName.LayoutParameters = Params;

Answer 7

You can use the setMargins() on the LinearLayout.LayoutParams . See the answer of this StackOverflow question for more information.

Answer 8

        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 .

<RelativeLayout>
   <TextView
    android:id="@+id/item_title">
</RelativeLayout>

If parent of the TextView is RelativeLayout means, then RelativeLayout.LayoutParams as above. If parent is LinearLayout means then

LinearLayout.LayoutParams mLinearlp = (LinearLayout.LayoutParams) tv
                    .getLayoutParams();

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 .