Develop Reference

Android components are not matched in position when running the app using phone

I placed a button in the middle of design layout from activity_main.xml but when i run the app through my phone, the positioning is not the same as the design inside activity_main.xml.
Tried to change layout to relative and the problem still exist.
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="160dp"
android:layout_marginLeft="160dp"
android:layout_marginTop="276dp"
android:text="Button"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
I expect that the design position from activity_main is the same when run through an actual android phone.
From the design layout
from the actual phone

First of all, you might want to adjust button relatively with other components. i.e. try to align your button on top of other component or maybe on bottom of another component.
Refer this link, it has all information
https://developer.android.com/reference/android/widget/RelativeLayout.LayoutParams#attr_android:layout_alignBottom
If you have confusion, share whole xml file for us to refer.

You need just to change the <ConstraintLayout/> in <RelativeLayout/> and replace the Button code by this:
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Button" />
Hope this will help.

First of all remove that margins from attributes. There is the left margin which make your button to go right and top margin which move button below the actual center point in small density devices.
So If you want to add button in center of screen in all devices. Use below code without any margin. But if your want to add spacing between other view then use small margin in other views.
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
Refer this guide to learn basics of constraints : guide

<RelativeLayout 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:background="#efeff1">
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Button" />
</RelativeLayout>

Buttons with ButtonBarButtonStyle do not highlight on touch

There are plenty of explanation about how to get buttons to display like standard dialogue buttons - which I follow. I have this in my xml:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:divider="?android:attr/dividerVertical"
style="?android:attr/buttonBarStyle"
android:showDividers="middle"
android:measureWithLargestChild="true">
<Button
android:id="#+id/button_cancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
style="?android:attr/buttonBarButtonStyle"
android:background="#drawable/dialog_button"
android:text="#string/button_cancel" />
<Button
android:id="#+id/button_ok"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="4"
style="?android:attr/buttonBarButtonStyle"
android:background="#drawable/dialog_button"
android:text="#string/button_ok" />
</LinearLayout>
This works perfectly well and produces the visual design I need. However when I touch the buttons, they don't highlight. This is rather annoying, as everything else is exactly as it should be. It seems that the buttonBarButtonStyle doesn't include the state drawables for different states of the button. Is there an easy way to get the highlight back?
Of course, I can just define my own state drawable defining different colours, but I want to use theme colours instead.

You need to apply the background:
android:background="?android:attr/selectableItemBackground"
to achieve the default "button bar" style and behavior.

How to implement this material design feature? (Button floating above keyboard)

Please check this screenshot
How to add buttons like this in android. Is there a library for it or what is it called?
Please note that when keyboard is hidden, this button takes up the space for navigation buttons.
Another question: How to change the size of the blue app bar when keyboard appears or hides?
**UPDATE : ** I can implement a similar layout using borderless buttons in frame layout and setting the gravity to bottom. Then I used android:windowSoftInputMode="adjustResize"
in the manifest file to make it work with keyboard hide/unhide. Still these buttons are not taking the space of navigation buttons. Also still need guidance for change app bar size on keyboard appear.

You can use
1- AppIntro
2- AppTour

Well, I would say that the button is not related in any way with they keyboard. I bet it's just a button inside a FrameLayout with the android:layout_gravity="bottom" property set.

It is a borderless button placed in a container(probably LinearLayout)
container itself is called buttonBar
Borderless button
One design that can be useful is a "borderless" button. Borderless
buttons resemble basic buttons except that they have no borders or
background but still change appearance during different states, such
as when clicked.
To create a borderless button, apply the borderlessButtonStyle style
to the button. For example:
<Button
android:id="#+id/button_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage"
style="?android:attr/borderlessButtonStyle" />
sample for button bar
<LinearLayout android:id="#+id/footer" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:orientation="horizontal"
android:layout_alignParentBottom="true" style="#android:style/ButtonBar">
<Button android:id="#+id/saveButton" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_weight="1"
android:text="#string/menu_done" />
<Button android:id="#+id/cancelButton" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_weight="1"
android:text="#string/menu_cancel" />
</LinearLayout>
Effect of everything else collapsing and this button bar being at top op keyboard can be achieved by keeping your entire view except buttonBar in a scroll view.

Use this as a reference. Insert your layout inside ScrollView.
<LinearLayout
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:orientation="vertical"
>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="1"
/>
</LinearLayout>
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button"
/>
</LinearLayout>
</LinearLayout>

How to Create Borderless Buttons in Android [duplicate]

This question already has answers here:
How to create standard Borderless buttons (like in the design guideline mentioned)?
(19 answers)
Closed 9 years ago.
The Android Design Guidelines say to use borderless buttons (see picture below), but don't really explain how. Someone asked this same question a few weeks ago here: How to create standard Borderless buttons (like in the design guidline mentioned)? and there was an answer marked as "the" answer, but I am still lost and I don't see a way to add comments to a question that has been "closed"
The answer-er said
"Look into the theme attributes buttonBarStyle,
buttonBarButtonStyle, and borderlessButtonStyle"
but I still can't figure out how to actually use those things. I Googled around a bit and couldn't find anything so I figured I'd just ask the question again, and hopefully someone can provide a little more detail on how this works.

I thought I had this solved when I looked here a few weeks ago and noticed the answer about using a transparent background but it isn't quite good enough because it prevents the button from being highlighted when pressed.
Also, setting the style to Widget.Holo.Button.Borderless isn't appropriate because it makes the button boundaries to big.
To figure this out once and for all, I check the android source code for the standard Calendar app and found that it uses the following:
android:background="?android:attr/selectableItemBackground"
Doing it this way ensures the button is borderless and the correct size.

Look at this: http://developer.android.com/guide/topics/ui/controls/button.html#Borderless
The attribute on your Button or ImageButton tag:
style="?android:attr/borderlessButtonStyle"

If you use ActionbarSherlock...
<Button
android:id="#+id/my_button"
style="#style/Widget.Sherlock.ActionButton" />

Some days ago a stumbeled over this again.
Here my solution:
This is done in 2 steps: Setting the button background attribute to android:attr/selectableItemBackground creates you a button with feedback but no background.
android:background="?android:attr/selectableItemBackground"
The line to divide the borderless button from the rest of you layout is done by a view with the background android:attr/dividerVertical
android:background="?android:attr/dividerVertical"
For a better understanding here is a layout for a OK / Cancel borderless button combination at the bottom of your screen (like in the right picture above).
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="48dp"
android:layout_alignParentBottom="true">
<View
android:layout_width="match_parent"
android:layout_height="1dip"
android:layout_marginLeft="4dip"
android:layout_marginRight="4dip"
android:background="?android:attr/dividerVertical"
android:layout_alignParentTop="true"/>
<View
android:id="#+id/ViewColorPickerHelper"
android:layout_width="1dip"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="4dip"
android:layout_marginTop="4dip"
android:background="?android:attr/dividerVertical"
android:layout_centerHorizontal="true"/>
<Button
android:id="#+id/BtnColorPickerCancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#id/ViewColorPickerHelper"
android:background="?android:attr/selectableItemBackground"
android:text="#android:string/cancel"
android:layout_alignParentBottom="true"/>
<Button
android:id="#+id/BtnColorPickerOk"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="?android:attr/selectableItemBackground"
android:text="#android:string/ok"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#id/ViewColorPickerHelper"/>
</RelativeLayout>

This code works for me:
<View
android:layout_width="match_parent"
android:layout_height="1dip"
android:background="?android:attr/dividerVertical" />
<LinearLayout
style="?android:attr/buttonBarStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:measureWithLargestChild="true"
android:orientation="horizontal"
android:paddingLeft="2dip"
android:paddingRight="2dip"
android:paddingTop="0dip" >
<Button
android:id="#+id/cancel"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="onClickCancel"
android:text="#string/cancel" />
<Button
android:id="#+id/info"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="onClickInfo"
android:visibility="gone"
android:text="#string/info" />
<Button
android:id="#+id/ok"
style="?android:attr/buttonBarButtonStyle"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="onClickSave"
android:text="#string/save" />
</LinearLayout>
I show 3 buttons at the bottom

android:background="#android:color/transparent"

<Button android:id="#+id/my_button" style="#android:style/Widget.Holo.Button.Borderless" />

You should also set margins and padding of the picture to 0.
Also look at the second, not marked answer at How to create standard Borderless buttons (like in the design guidline mentioned)?

Transparent button bars found in Android Gallery App

I am trying to add a transparent button bars at the top and bottom of my activity, much like in the Android Gallery App.
I have been looking through the Gallery app source code, but I'm not able to see how they did it. When using some snippits of their code, I am able to produce a button bar, but it is a dark grey color with lighter grey buttons:
<LinearLayout android:id="#+id/gridView_multiSelectBar"
android:orientation="horizontal" android:visibility="gone"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0" android:clickable="false"
android:paddingTop="5dp" android:paddingLeft="4dp"
android:paddingRight="4dp" android:paddingBottom="1dp"
android:background="#android:drawable/bottom_bar"
android:layout_alignParentBottom="true">
<Button android:id="#+id/gridView_multiSelectBar_button_share"
android:layout_width="0dp" android:layout_height="match_parent"
android:layout_weight="1" android:text="#string/gridView_multiSelectBar_button_share" />
<Button android:id="#+id/gridView_multiSelectBar_button_copy"
android:layout_width="0dp" android:layout_height="match_parent"
android:layout_weight="1" android:text="#string/gridView_multiSelectBar_button_copy" />
<Button android:id="#+id/gridView_multiSelectBar_button_delete"
android:layout_width="0dp" android:layout_height="match_parent"
android:layout_weight="1" android:text="#string/gridView_multiSelectBar_button_delete" />
<Button android:id="#+id/gridView_multiSelectBar_button_close"
android:layout_width="0dp" android:layout_height="match_parent"
android:layout_weight="1" android:text="#string/gridView_multiSelectBar_button_close" />
</LinearLayout>
The code implies that they are using Button widgets. The screenshot below almost looks like its using a menu for the bottom, but then I'm not sure how they are drawing the top area.
My app has a black background. I would like these buttons to a thin border to show the boundaries between them, as well as the main content.
Can anyone can point me in the right direction?
Thanks in advance,
Kevin

A similar question was asked and answered in
How to Set Opacity (Alpha) for View in Android.
It is a matter of setting the alpha content of your view. Hope that helps you.
Cheers!!!
nJoshi