How to set margins for TextView programmatically?

TextView tv1 = new TextView(this);
tv1.setPadding(5, 0, 5, 0);
tv1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
tv1.setBackgroundColor(Color.parseColor("#0099cc"));
tv1.setTextColor(Color.WHITE);
tv1.setTextSize(11);
tv1.setGravity(Gravity.LEFT | Gravity.BOTTOM);
tv1.setText("Test1");
ll.addView(tv1);


TextView tv2 = new TextView(this);
tv2.setPadding(5, 0, 5, 0);
tv2.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
tv2.setBackgroundColor(Color.parseColor("#0099cc"));
tv2.setTextColor(Color.WHITE);
tv2.setTextSize(11);
tv2.setGravity(Gravity.LEFT | Gravity.BOTTOM);
tv2.setText("Test2");
ll.addView(tv2);

As you can see, in this peace of code I set TextView's background color. What I want to do is I want to separate both of these TextView's from each other, so that their background colors would be separated by a line. I don't want them to connect. As I understand, it would be possible to do so, if I could set margins of TextView, but as I know, TextView's are not able to do so.

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最佳答案

set to LayoutParams.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(10,10,10,10);
tv1.setLayoutParams(params);
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This one should be tried

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT, ActionBar.LayoutParams.WRAP_CONTENT);
params.setMargins(10,20,30,20);
txt_gender.setLayoutParams(params);
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It depends according to your parent view.

If you using LinearLayout on your textview as a parent view give params like below

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(10,10,10,10);
tv1.setLayoutParams(params);

If you using RelativeLayout on your textview as a parent view give params like below

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(10,10,10,10);
tv1.setLayoutParams(params);
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All these answers are great, but I was using ConstraintLayout, so here is code for that:

ConstraintLayout.LayoutParams params = new ConstraintLayout.LayoutParams(ConstraintLayout.LayoutParams.WRAP_CONTENT, ConstraintLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(10, 10, 10, 10);
textview.setLayoutParams(params); // note that textview would be your instanced TextView object
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For Kotlin use following code snippet

(textView.layoutParams as ConstraintLayout.LayoutParams).apply {
marginStart=8.dpToPixels()
topMargin=8.dpToPixels()
marginEnd=8.dpToPixels()
bottomMargin=8.dpToPixels()
}

Change LayoutParams as per used layout. Thanks.

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Using Kotlin Extensions:

Here is simple extension for setting margins for textview.

fun View.setMargins(marginLeft: Int, marginTop: Int, marginRight: Int, marginBottom: Int) {
val params: LinearLayout.LayoutParams =
LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
params.setMargins(margin.dp, 0, margin.dp, 0)
this.layoutParams = params
}

For Int to dp conversion, here is another extension

val Int.dp: Int
get() = (this * Resources.getSystem().displayMetrics.density).toInt()

You can call this extension to give horizontal margin 8dp as follows

yourTextView.setMargins(8, 0, 8, 0)
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If you use Kotlin ex. in Adapter add like this:

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val params = holder.tvNext.layoutParams as MarginLayoutParams
params.bottomMargin=0
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set margins for TextView programmatically

Here The way That you can use it any where in your Application

create a Object class and add this code there

    fun setMargin(left: Int, top: Int, right: Int, bottom: Int, textView: TextView){
val params: LinearLayout.LayoutParams =
LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
params.setMargins(left, top, right, bottom)
textView.setLayoutParams(params)
}

Then you can call it anywhere and use it for any TextView of course you can change the layout for anything you want.

you can call this function like this.

setMargin(0, 70, 0, 0, title)
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In Kotlin I do like this:

    binding.playBtn.updateLayoutParams<ViewGroup.MarginLayoutParams> {
setMargins(0,16,0,0) //parameters are in pixel
}
binding.playBtn.setPadding(10)

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