Develop Reference

RelativeLayout View to right of TextView

I got following simple Layout. The problem can be reproduced in the android studio designer:
<?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/x"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="#dimen/margin_small"
android:layout_marginRight="#dimen/margin_small"
android:text="#string/long_string"
android:textAppearance="?android:attr/textAppearanceSmall"/>
<CheckBox
android:id="#+id/y"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/x"
android:layout_toEndOf="#+id/x"
android:layout_centerVertical="true" />
</RelativeLayout>
This layout works fine if the text length of the textview is short. The checkbox is placed on the right of the textview. But if the text gets long and even wraps maybe, then the checkbox is pushed out of the view. It is not visible anymore. I would like that the checkbox is always visible on the right of the textview even, if it fills the whole width of the screen.
I tried to rewrite the layout with a LinearLayout which doesn't work either.
<?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"
android:orientation="horizontal">
<TextView
android:id="#+id/x"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="#dimen/margin_small"
android:layout_marginRight="#dimen/margin_small"
android:text="#string/long_string"
android:textAppearance="?android:attr/textAppearanceSmall"/>
<CheckBox
android:id="#+id/y"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
Do you know a trick to to achieve this with relative layout? I would somehow expect this behaviour from relative layout by default. Thanks ;)

This is working for me: make checkBox alignParentRight and make TextView toLeftOf it:
<?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/x"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/y"
android:text="This is very-very-very looooooooooooong stringgggg, very-very, long-long"
android:textAppearance="?android:attr/textAppearanceSmall"/>
<CheckBox
android:id="#+id/y"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"/>
</RelativeLayout>
Edit. You can include this Relative Layout into other (parent) layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:gravity="left">
<TextView
android:id="#+id/x"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/y"
android:text="this is veryyyyy yyyyyyyyyy yyyyyy yyy loooooo oooooooo ooon nnggggg gggg striiii iiiiin gggggg ggggg ggggggg ggg"
android:textAppearance="?android:attr/textAppearanceSmall"/>
<CheckBox
android:id="#+id/y"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true" />
</RelativeLayout>
</RelativeLayout>
It's also working. If you put android:gravity="left" into Relative layout, it will locate its content on the left side.

One way out would be to put the textview and checkbox in a linear layout with orientation horizontal. Set width of checkbox to be whatever you want (a constant) and the width of textbox to be 0dp and layout_weight of 1.

You should put the property layout_weight to make your views (TextView and Checkbox) have a deff space in the screen instead of use a hard value
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/x"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.9"
android:layout_marginEnd="#dimen/margin_small"
android:layout_marginRight="#dimen/margin_small"
android:text="#string/long_string"
android:textAppearance="?android:attr/textAppearanceSmall"/>
<CheckBox
android:id="#+id/y"
android:layout_weight="0.1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>

I guess the desired layout is not possible by default. I tried to do this using RelativeLayout, LinearLayout and TableLayout. It is technically understandable that the these layout do not support that behaviour. The relative layout would have to explicitly respect the case that an element on the left or right is minimal visible inside the parent even it is placed to left or right. Another solution would be if the table layout would allow a column to consume the rest of the space but respects min width of other columns as well.
For my case i wrote a workaround. I used the initial relative layout of my question but set a max width to the textview using following calculation:
DisplayMetrics displaymetrics = new DisplayMetrics();
context.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int displayWidth = displaymetrics.widthPixels;
That guarantees the checkbox to be visible. I know the solution could be hardly possible in scenarios where the given layout is embedded in a more complex layout.

TextView below Image not showing up in Android

I am trying to put a text below an image but they are not showing up in android layout.
Here is the screenshot:
I dont' see any text below image.
And my code: inside a relative layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_footer"
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="?android:attr/actionBarSize"
android:background="#color/panelcolor" >
<ImageView
android:id="#+id/searchicon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:paddingRight="60dp"
android:src="#drawable/search_white" />
<TextView
android:id="#+id/searchText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="60dp"
android:textColor="#color/whitetext"
android:layout_below="#+id/searchicon"
android:text="Search" />
<ImageView
android:id="#+id/homeicon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:paddingRight="60dp"
android:layout_toRightOf="#+id/searchicon"
android:src="#drawable/ic_home" />
<TextView
android:id="#+id/hometext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="60dp"
android:textColor="#color/whitetext"
android:layout_below="#+id/homeicon"
android:text="Home" />
<ImageView
android:id="#+id/wishicon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_toRightOf="#+id/homeicon"
android:src="#drawable/ic_favorite" />
<TextView
android:id="#+id/wishtext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="60dp"
android:textColor="#color/whitetext"
android:layout_below="#+id/wishicon"
android:text="Wish List" />
<ImageView
android:id="#+id/viewicon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:paddingLeft="60dp"
android:layout_toRightOf="#+id/wishicon"
android:src="#drawable/ic_eye" />
<TextView
android:id="#+id/viewtext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="60dp"
android:textColor="#color/whitetext"
android:layout_below="#+id/wishicon"
android:text="Viewed" />
</RelativeLayout>
Not sure what is wrong?

Assuming you follow Googles Design guidelines
(Tabs with icons and text Height - 72dp;
Icon - 24 x 24dp)
Change 'match_parent' to 'wrap_content' for the ImageViews

The problem is you have put android:layout_height="match_parent" for image views and android:layout_height="wrap_content" for text views. Either use wrap_content for image view or use use a LinearLayout with android:weight property. Using LinearLayout would also solve your problem of alignment if it occurs!

Try setting android:layout_alignParentBottom="true" instead of android:layout_below="#+id/homeicon".
This aligns the text at the bottom of the parent. You might also need to set android:layout_alignLeft="" and align it to the corresponding imageView.
This method will only work, if there is enough padding below the image. This is because the text will now overlap the image.
EDIT:
Another way would be, to set the relative layout to a fixed height you know (like 60dp) and set the imageView to a fixed height (like 40dp). Then the TextView will also show up below the ImageView.

How to align two TextView in a LinearLayout in the same line

I have two TextView in a LinearLayout, I want to align them one to the left (or center) and one to right in the same line. How to do this? I try to use gravity but they ignore it.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right"
android:text="TextView" />
</LinearLayout>

The easiest way is to change your LinearLayout to a RelativeLayout.
You can use android:layout_alignParentRight="true" and android:layout_alignParentLeft="true". Or to center it use android:layout_centerInParent="true"
See here why gravity won't work
You are using gravity instead of layout_gravity which is what you would want. This post should help clarify the difference
The docs show you available properties.

android:gravity is used to set the gravity of content inside the view. However, in your case the width is wrap_content, hence the content has nowhere to go in the text views.
Use a RelativeLayout with layout_width as match_parent. Then use the android:layout_alignParentLeft="true" and android:layout_alignParentRight="true"with the textViews.

Use it with or without the android:gravity in the second textview and try .
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_weight="1" />
<TextView
android:id="#+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:gravity="right"
android:layout_weight="1" />
</LinearLayout>

If LinearLayout is Vertical, you can put only an object per line.
You can use RelativeLayout, or else put in a line a LinearLayout Horizontal, that contains textviews
ex.
<LinearLayout vertical>
<LinearLayout horizontal>
<textview 1></>
<textview 2></>
</LinearLayout>
</LinearLayout>

I fixed all my issues with GridLayout...is the best thing bcos u don't need to align anithing to nothing...just put what u want into the matrix (row,column)...and this will allow you to visualize all the field in exactly wrap content of your datas also in landscape is perfect!

Margin on ListView items in android

I'm trying (in vain) to add margins to my ListView items. I have tried adding margin values to my RelativeLayout below but no matter what I do all I seem to get is a 1px line between each item.
What I really would like is to have rounded corners on each item, a 1px black border and a 3-5px margin left, top, and right but right now I'll settle for just a margin around each item :-)
How do I achieve my goals? Just the margin for now... ;-)
Here's what I have:
UPDATE: I have updated the xml below removing main layout and fragment layout. I have also updated the ListView item layout to what I have now which is closer to what I want but still not perfect. Screenshot added as well
listview item layout xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="#dimen/matchMargin"
android:paddingRight="#dimen/matchMargin"
android:paddingTop="#dimen/matchMargin" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#cfcfcfcf" >
<include
android:id="#+id/matchKampstart"
layout="#layout/kampstart_layout" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/matchKampstart"
android:layout_marginTop="#dimen/belowKampstartMargin" >
<ImageView
android:id="#+id/tournamentImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="2dp"
android:adjustViewBounds="true"
android:contentDescription="#string/tournamentImageViewContentDescription"
android:gravity="left"
android:src="#drawable/sofabold_launcher" />
<ImageView
android:id="#+id/homeTeamImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="2dp"
android:adjustViewBounds="true"
android:contentDescription="#string/homeTeamImageViewContentDescription"
android:src="#drawable/sofabold_launcher" />
<TextView
android:id="#+id/homeTeam"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="2dp"
android:text="#string/home"
android:textSize="14sp"
android:textStyle="bold" />
<TextView
android:id="#+id/dash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="2dp"
android:gravity="center"
android:text="#string/dash"
android:textSize="12sp"
android:textStyle="bold" />
<ImageView
android:id="#+id/awayTeamImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="2dp"
android:adjustViewBounds="true"
android:contentDescription="#string/awayTeamImageViewContentDescription"
android:src="#drawable/sofabold_launcher" />
<TextView
android:id="#+id/awayTeam"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:gravity="center"
android:text="#string/away"
android:textSize="14sp"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#id/matchKampstart"
android:layout_marginTop="#dimen/belowKampstartMargin" >
<ImageView
android:id="#+id/tvChannelImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="false"
android:contentDescription="#string/tvChannelImageViewContentDescription"
android:gravity="right"
android:src="#drawable/sofabold_launcher" />
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
This gives me the following where you'll notice a very small line to the right and left for each item. That I would also like to get rid of.

I'm not great with layouts, but I have noticed in the past that ListView rows often ignore LayoutParams. I have no idea where this happens or if it's possible to override, I do know you can easily work around it by adding another layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:background="#990000ff" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#9900ff00"
android:paddingLeft="10dp" >
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#99ff0000" />
</LinearLayout>
</LinearLayout>
Typically layouts that only have one child can be removed, but as you can see this one serves a purpose:
The outer-most layout is blue, the TextView is red, and the green is the extra layout that allows you to add some extra spacing. Notice the difference between padding (the green on the left) and margin (no green on the right). You have clearly stated that you want to use margins (android:layout_margin) but your code clearly uses padding (android:padding) so I included both.

A little late seeing this, but just add the following lines to your ListView xml element
android:divider="#00000000"
android:dividerHeight="10dp"

See the answer here for why. In short the child asks the parent, and the list view row uses AbsListView.LayoutParams, which doesn't include margins.
Why LinearLayout's margin is being ignored if used as ListView row view

In your adapter, catch your relative layout in getView(), then give a layout params ,
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)view.getLayoutParams();
params.setMargins(80, 0, 0, 0); //substitute parameters for left, top, right, bottom
YourRelativeLayoutInAdapter.setLayoutParams(params);

I suppose you have a ListView defined in an XML file somewhere, if so, you could add some padding to it, so that there will be some space between the edge of the screen and the ListView.
Example:
<ListView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="15dp"/>

Center multiple items in a RelativeLayout without putting them in a container?

I have a RelativeLayout containing a pair of side-by-side buttons, which I want to be centered within the layout. I could just put the buttons in a LinearLayout and center that in the RelativeLayout, but I want to keep my xml as clean as possible.
Here's what I tried, this just puts the "apply" button in the center and the "undo" button to the left of it:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15sp">
<TextView
android:id="#+id/instructions"
android:text="#string/instructions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="15sp"
android:layout_centerHorizontal="true"
/>
<Button
android:id="#+id/apply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="#string/apply"
android:textSize="20sp"
android:layout_below="#id/instructions"
/>
<Button
android:id="#+id/undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="#string/undo"
android:textSize="20sp"
android:layout_toLeftOf="#id/apply"
android:layout_below="#id/instructions"
/>
</RelativeLayout>

android:gravity will align the content inside the view or layout it is used on.
android:layout_gravity will align the view or layout inside of his parent.
So adding
android:gravity="center"
to your RelativeLayout should do the trick...
Like this:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="15sp">
</RelativeLayout>

Here is an extension of BrainCrash's answer. It is a non nested option that groups and centers all three horizontally and vertically. In addition, it takes the top TextView and centers it horizontally across both buttons. If desired, you can then center the text within the TextView with android:gravity="center". I also removed the margins, added color, and set the RelativeLayout height to fill_parent to highlight the layout. Tested on API 11.
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:background="#android:color/black"
>
<TextView
android:id="#+id/instructions"
android:text="TEST"
android:textSize="20sp"
android:background="#android:color/darker_gray"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignLeft="#+id/undo"
android:layout_alignRight="#+id/apply"
android:gravity="center"
/>
<Button
android:id="#+id/apply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="APPLY"
android:textSize="20sp"
android:layout_below="#id/instructions"
/>
<Button
android:id="#+id/undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="UNDO"
android:textSize="20sp"
android:layout_toLeftOf="#id/apply"
android:layout_below="#id/instructions"
/>
</RelativeLayout>

android:layout_gravity="center"
will almost give what you're looking for.

Here is a combination of the above answer's that solved my specific situation:
Centering two separate labels within a layout that also includes a button in the left most position of the same layout (button, label, label, from left to right, where the labels are centered relative to the layout containing all three views - that is, the button doesn't push the labels off center).
I solved this by nesting two RelativeLayout's, where the outer most layout included the
Button and an Inner-RelativeLayout.
The Inner-RelativeLayout contained the two text labels (TextView's).
Here is a snippet that provides the details of how the centering and other layout stuff was done:
see: RelativeLayout Gravity not applied? and
Gravity and layout_gravity on Android
for the difference's between gravity and layout_gravity.
Tweak the paddingLeft on the btn_button1 Button to see that the TextView's do not move.
(My apologies to havexz for the downvotes. I was too hasty in thinking that just b/c your suggestions didn't solve the exact question being ask, that they do help to solve very similar situations (the answer here solves a very specific situation, and only the combination of all these answer's solved my problem. I tried upvoting, but it won't let me unless I edit the answer's, which I don't want to do.)
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/rl_outer"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:background="#FF0000FF">
<Button
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/btn_button1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF00FF00"
android:text="<"
android:textSize="20sp"
android:paddingLeft="40dip"/>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/rl_inner"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FFFF00FF"
android:layout_centerInParent="true"
android:gravity="center">
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tv_text1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF505050"
android:textSize="20sp"
android:textColor="#FFFFFFFF"
android:text="Complaint #"
android:gravity="center"/>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tv_text2"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF505050"
android:textSize="20sp"
android:textColor="#FFFFFFFF"
android:layout_toRightOf="#id/tv_text1"
android:gravity="center"/>
</RelativeLayout>
</RelativeLayout>

LinearLayout is a good option. Other than that there are options like create an invisible view and center that and then align left button to the left it and right on the right of it. BUT those are just work arounds.