Android如何动态居中编辑文本

Question

Goal

I have a RelativeLayout with some TextView's sets in xml and I want to add dynamically some EditText's, one below another.

Problem

How can I center horizontally those EditText's?

Code

Here is my code up to date:

/* Layout with EditText's */
RelativeLayout parentLayout = (RelativeLayout)
findViewById(R.id.relativeLayoutLectura);
EditText editText = new EditText(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// If it's first EditText to insert, goes below another linearLayout set before
if(id == -1) {
    editText.setId(1);
    params.addRule(RelativeLayout.BELOW, R.id.linearLayoutMensajeLectura);
} else {
    editText.setId(id);
    params.addRule(RelativeLayout.BELOW, id-1);
}
editText.setLayoutParams(params);
editText.setGravity(Gravity.CENTER_HORIZONTAL); //It does nothing
parentLayout.addView(editText);

Thanks in advance.

Answer 1

Setting the gravity of the edit text will effect where the text is displayed inside it.

As you're putting it into a RelativeLayout, you need to params.addRule(RelativeLayout.CENTER_IN_PARENT) or params.addRule(RelativeLayout.CENTER_HORIZONTAL)