Relativelayout characters horizontally (vertically centered) aligned in Android

Background

The content in the TextView shown in Android here is not in the middle of the level.

You want to align the horizontal center.

"Toss the process"

1. Search:

Android Relativelayout Horizontal Center

Reference:

Android–textview Horizontal Center in Relativelayout–stack Overflow

I tried it:

Android:layout_centerhorizontal= "true"

But it's useless.

2. Later saw:

Relativelayout–android Relative Layout Align center–stack Overflow

To try it:

Android:layout_centervertical= "true"

Just understand:

I was wrong to search the horizontal, in fact, to search vertical.

Now the effect is what you need:

Summary

To align horizontally, you only need to set:

Android:layout_centervertical= "true"

Can.

Extended

More other parameters, can go to the official website:

Relativelayout.layoutparams | Android Developers

Found in:

Attribute Name	Related Method	Description
Android:layout_above	Positions the bottom edge of this view above the given anchor view ID.
Android:layout_alignbaseline	Positions the baseline of this view on the baseline of the given anchor view ID.
Android:layout_alignbottom	Makes the bottom edge of this view match the bottom edge of the given anchor view ID.
Android:layout_alignend	Makes the end edge of this view match the end edge of the given anchor view ID.
Android:layout_alignleft	Makes the left edge of this view match the left edge of the given anchor view ID.
Android:layout_alignparentbottom	If true, makes the bottom edge of this view match the bottom edge of the parent.
Android:layout_alignparentend	If true, makes the end edge of this view match the end edge of the the parent.
Android:layout_alignparentleft	If true, makes the left edge of this view match the left edge of the parent.
Android:layout_alignparentright	If true, makes the right edge of this view match the right edge of the parent.
Android:layout_alignparentstart	If true, makes the start edge of this view match the start edge of the parent.
Android:layout_alignparenttop	If true, makes the top edge of this view match the top edge of the the parent.
Android:layout_alignright	Makes the right edge of this view match the right edge of the given anchor view ID.
Android:layout_alignstart	Makes the start edge of this view match the start edge of the given anchor view ID.
Android:layout_aligntop	Makes the top edge of this view match the top edge of the given anchor view ID.
Android:layout_alignwithparentifmissing	If set to True, the parent would be used as the anchor when the anchor cannot is be a found for Layout_toleftof, Layout_torig Htof, etc.
Android:layout_below	Positions the top edge of this view below the given anchor view ID.
Android:layout_centerhorizontal	If true, centers this child horizontally the within its parent.
Android:layout_centerinparent	If true, centers this child horizontally and vertically within its parent.
Android:layout_centervertical	If true, centers this child vertically the within its parent.
Android:layout_toendof	Positions the start edge of this view to the end of the given anchor view ID.
Android:layout_toleftof	Positions the right edge of this view to the left of the given anchor view ID.
Android:layout_torightof	Positions the left edge of this view to the right of the given anchor view ID.
Android:layout_tostartof	Positions the end edge of this view to the start of the given anchor view ID.

As for each is what effect, you can go to try more on their own to know.

Relativelayout characters horizontally (vertically centered) aligned in Android