Develop Reference

Can't center the TextView using RelativeLayout

I've got an issue with my TextView, I just can't center it. Here's what it should look like :
And it's actually look like that
Here's my XML code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/magnitudeTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_margin="10dp"
android:textSize="15sp" />
<TextView
android:id="#+id/cityNameTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="10dp"
android:textSize="15sp" />
<TextView
android:id="#+id/dateTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_margin="10dp"
android:textSize="15sp" />
</RelativeLayout>

Using a LinearLayout with horizontal orientation along with a weightsum of 3 for the children text view would give you a light and more reliable solution, doing it like the following:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="3"
android:orientation="horizontal">
<TextView
android:id="#+id/magnitudeTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_weight="1"
android:text="test"
android:textSize="15sp" />
<TextView
android:id="#+id/cityNameTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test"
android:gravity="center"
android:layout_weight="1"
android:layout_margin="10dp"
android:textSize="15sp" />
<TextView
android:id="#+id/dateTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_margin="10dp"
android:textSize="15sp" />
</LinearLayout>
Now each of your text views will take exactly 1/3 of the whole screen width, if you want the center one to be bigger you can play with the layout_weight value in each of the text view to match your desired design.

Instead of RelativeLayout you can use LinearLayout in which you can set the weightsum to 3 that will give you more reliable solution. Every TextView will get the equal amount of space in a row.

The Below technique work for me.That is:
Use your first TextView as left orient and middle TextView as center oriented and last TextView as right oriented and apply weight for each TextView.
Your code it would be like this:
<?xml version="1.0" encoding="utf-8"?>
<Linearlayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
orientation=vertical
weightsum=3
>
<TextView
android:id="#+id/magnitudeTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_margin="10dp"
android:textSize="15sp"
android:layout_weight=1 />
<TextView
android:id="#+id/cityNameTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:textSize="15sp"
android:layout_weight=1/>
<TextView
android:id="#+id/dateTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_margin="10dp"
android:textSize="15sp"
android:layout_weight=1/>
</LinearLayout>
`

A horizontal LinearLayout would provide a better and lighter solution for your problem. What you'd do is wrap your three textviews in it, then use layout_width=wrap_content for the ones to the left and right and layout_width=0dp
layout_weight=1
for the middle one

Generally, a linear layout with weights would suit these kinds of needs, the system will automatically divide the screen into parts depending on the weightsum you mentioned
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum = "5"
android:orientation = "horizontal"
/>
<TextView
android:id="#+id/magnitudeTV"
android:layout_width="0dp"
android:layout_weight = "1"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_margin="10dp"
android:textSize="15sp" />
<TextView
android:id="#+id/cityNameTV"
android:layout_width="0dp"
android:layout_weight = "3"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="10dp"
android:textSize="15sp" />
<TextView
android:id="#+id/dateTV"
android:layout_width="0dp"
android:layout_weight = "1"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_margin="10dp"
android:textSize="15sp" />
</LinearLayout>

You can achieve this by doing this :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true">
<TextView
android:id="#+id/magnitudeTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="sdf34 "
android:textColor="#000000"
android:textSize="15sp" />
<TextView
android:id="#+id/cityNameTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/magnitudeTV"
android:layout_margin="10dp"
android:text="dasdasdsadasdds"
android:textColor="#000000"
android:textSize="15sp" />
<TextView
android:layout_toRightOf="#id/cityNameTV"
android:id="#+id/dateTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="fg25111dfg"
android:textColor="#000000"
android:textSize="15sp" />
</RelativeLayout>
but according to me it is not a good solution for this you can con-catenate all the three strings and than set the final string to one single text view as mentioned below:
String final_string = distance +" "+string_2 +" "+string_3;
textView.setText(final_string);

Can't set margin left userName

i have 2 items in a relative layout that i want to put side by side,the User icon and the username, at the moment i have the user icon where i want but the username is always right at the side with no margin, i need some margin left so i can have a litle space between each other, and i tried with margin left but it didn't work.
here is the xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="142dp"
android:layout_gravity="center"
android:layout_margin="#dimen/card_margin"
android:elevation="3dp"
card_view:cardCornerRadius="#dimen/card_specie_radius">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<com.example.afcosta.inesctec.pt.android.Helpers.NexusBoldTextView
android:id="#+id/Avaliation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/plantName"
android:layout_marginStart="92dp"
android:layout_marginTop="15dp"
android:layout_toEndOf="#+id/dateTxt"
android:text="Avalie a fotografia" />
<com.example.afcosta.inesctec.pt.android.Helpers.NexusBoldTextView
android:id="#+id/dateTxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_marginEnd="29dp"
android:text="TextView" />
<ImageView
android:id="#+id/reportImg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/color_cursor_white" />
<ImageView
android:id="#+id/plantPhoto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginRight="16dp" />
<ImageView
android:id="#+id/userIcon"
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_alignParentBottom="true"
android:layout_below="#id/plantPhoto"
android:src="#drawable/ic_user"
/>
<com.example.afcosta.inesctec.pt.android.Helpers.NexusBoldTextView
android:id="#+id/plantName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/plantPhoto"
android:textColor="#color/nephritis"
android:textSize="20sp" />
<com.example.afcosta.inesctec.pt.android.Helpers.NexusBoldTextView
android:id="#+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/plantPhoto"
android:textColor="#color/base"
android:layout_marginEnd="29dp"
android:layout_toEndOf="#+id/userIcon"
android:layout_toLeftOf="#+id/userIcon"
android:layout_marginLeft="20dp"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>

I have found too issues with your code:
You have both android:layout_toEndOf="#+id/userIcon" and android:layout_toLeftOf="#+id/userIcon" attributes set in your username view, which makes no sense. You should replace android:layout_toLeftOf with android:layout_toRightOf if you want it to be to the right of the userIcon view.
You are setting the left position of the username view with the android:layout_toEndOf="#+id/userIcon" attribute, that's why android:layout_marginLeft="20dp" has no effect. You can use android:paddingLeft="20dp" instead.
Let me know if it helps.

Multiline TextView and Singleline TextView in one line

I want to get next result in my layout:
[left textview] [space] [right textview]
For this purpose I use it:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingBottom="10dp"
android:paddingTop="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:text="left"
android:id="#+id/left"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="right"
android:id="#+id/right"/>
</RelativeLayout>
It's okay. But if left TextView contains a large text, the result will be next:
[left textview] (under left textview [right textview]. So left override right. But I want that left TextView doesn't override right, and when left TextView reaches right TextView the Left TextView go down into multiline. So I want to get next result:
some-text-text-left-multiline
some-text-text-left-multiline text-in-right-text-view
some-text-text-left-multiline

Use a linear layout (horizontal) and place textview with the same android:layout_weight inside to make a 50/50 split
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/left"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<TextView
android:id="#+id/right"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
This expands the left until reaching the right using android:layout_toLeftOf
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="#id/right"
android:text="this is a long text on the left which should be multiline and it is" />
<TextView
android:id="#+id/right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="some text" />
</RelativeLayout>

Do this to your layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:gravity="right"
android:minWidth="50dp"
android:maxWidth="100dp"
android:text="right" />
<TextView
android:id="#+id/left"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:gravity="left"
android:layout_toLeftOf="#+id/right"
android:text="left" />
</RelativeLayout>

RelativeLayout- android:layout_centerHorizontal="true" and android:layout_centerVertical="true" dont center the imageview

For some strange reason android:layout_centerHorizontal="true" and android:layout_centerVertical="true" dont center the ImageView don't seem to center my ImageView
Any suggestions?
The image is stuck in the upper right left hand corner of the screen and it does not center as expected.
SOURCE:
*<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8sp"
android:layout_marginLeft="8sp"
android:layout_marginRight="8sp"
android:layout_marginTop="8sp"
android:background="#drawable/background"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/emblem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:adjustViewBounds="true"
android:scaleType="fitStart"
android:src="#drawable/apn_app_logo" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/start2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="8sp"
android:layout_toRightOf="#id/start" >
<Button
android:id="#+id/go_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="#drawable/apn_app_go_button" />
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/go_button"
android:layout_marginRight="8sp"
android:layout_marginTop="8sp"
android:gravity="center"
android:text="#string/start_text"
android:textColor="#000000"
android:textSize="18sp" />
</RelativeLayout>
</RelativeLayout>*

Move the centerHorizontal to the relative layout. Currently, you are centering the image in the image view (basically you are centering the image in the view), what you want is the relative layout to have the contents centered.
Try:
<RelativeLayout
android:id="#+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true">
<ImageView
android:id="#+id/emblem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitStart"
android:src="#drawable/apn_app_logo" />
</RelativeLayout>
The other option is to do:
<RelativeLayout
android:id="#+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<ImageView
android:id="#+id/emblem"
android:layout_width="match_parent" //change to match_parent
android:layout_height="match_parent" //change to match_parent
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:adjustViewBounds="true"
android:scaleType="fitStart"
android:src="#drawable/apn_app_logo" />
</RelativeLayout>
The second option sets the width and height of the imageView to match the relativeView, which would allow you to use the centerHorizontal and centerVertical in the imageView

You can't use android:layout_below in a LinearLayout. You could put these two items in a RelativeLayout, or you could change your LinearLayout from "horizontal" to "vertical" as follows:
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_horizontal"
android:orientation="vertical" >

How to align the text on the right side of a picture?

I have an ImageView aligned to the parent right in a relativeLayout.
Here is my layout:
<RelativeLayout android:id="#+id/row" android:background="#null" style="#style/ListRow"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView android:textStyle="bold" android:textColor="#color/primary_text" android:text="Username" android:gravity="center_vertical" android:id="#+id/username" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleLine="true" android:layout_toLeftOf="#id/avatar" />
<LinearLayout android:gravity="center_vertical" android:id="#+id/time_item" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="#id/username" android:layout_alignBottom="#id/username" android:layout_alignParentLeft="true">
<TextView android:textSize="#dimen/font_size_small" android:text="12:00AM" android:textColor="#color/secondary_text" android:gravity="center_vertical" android:id="#+id/date" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</LinearLayout>
<RelativeLayout android:id="#+id/avatar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5.0dip" android:layout_alignParentRight="true">
<ImageView android:id="#+id/picture" android:src="#drawable/ic_launcher" android:layout_width="48.0dip" android:layout_height="48.0dip" android:scaleType="center" android:adjustViewBounds="true" />
<ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" />
</RelativeLayout>
<TextView android:textSize="#dimen/font_size_small" android:text="aslkndalskndlaksndlaskndlaksnlansldnaslkndalsdnaslkdnls" android:textColor="#color/primary_text" android:id="#+id/body" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_toLeftOf="#id/avatar" android:layout_below="#id/username" android:lineSpacingMultiplier="1.2" />
</RelativeLayout>
Here is what it looks like:
When starting a new line of text I want the text to align on to the right instead of the left. I have photoshopped what I want. Here is what I want:
Anyone know how I should modify my layout to where it does this? Thanks!

Just add one more property in your TextView body.
android:gravity="right"

You are missing the android:gravity="right" element from your TextView Body. It should go like
<TextView android:gravity="right"...
That simply makes the text originate on the right side of the TextView