Develop Reference

Button with left icon and text perfectly aligned

Good evening,
I am developing an Android app and I am currently doing the Login interface in XML.
I am trying to create buttons with icon and text, like in the picture below :
http://i.imgur.com/J5Cj1w4.png
And here is my actual result :
http://i.imgur.com/VPALdDD.png
With this code :
<Button
style="?android:textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/sign_up_facebook"
android:text="#string/signup_with_facebook"
android:textColor="#color/primaryTextLight"
android:drawableLeft="#drawable/ic_facebook_box_white_24dp"
android:layout_weight="0"
android:background="#drawable/button_shape_login"/>
<Button
style="?android:textAppearanceSmall"
android:layout_marginTop="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/sign_up_google"
android:text="#string/signup_with_google"
android:textColor="#color/primaryTextLight"
android:drawableLeft="#drawable/ic_google_plus_box_white_24dp"
android:layout_weight="0"
android:background="#drawable/button_shape_login"/>
I am stuck at this step.
How can I get the final needed result with XML code ?
Thank you!

You can give padding to drawable like this : android:drawablePadding="50dip"
Also this question answered in this post.

Use android:drawablePadding attribute

You only need to specify android:paddingLeft attribute.
Try specifying a value of 36dp for example

The better option is to actually make the button a Relative/Linear layout with the layout set inside, the drawablePadding will not work so well with different lengths of text and buttons.
Essentially, RelativeLayout which is your button with a nested ImageView and TextView and you'll have good control of the layout, with consistent paddings around images and text within the button.
I haven't tested the following, this is essentially what you need
<LinearLayout
android:id="#+id/facebookButton"
android:layout_width="250dp"
android:layout_height="80dp"
android:orientation="horizontal">
<ImageView
android:src="#drawable/your_drawable"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="50dp"/>
<TextView
android:text="Sign up with Facebook"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"/>
</LinearLayout>

android:gravity="center_vertical"
//use in both textView

<Button
android:paddingLeft="50dp"
android:textAlignment="textStart"
android:drawableLeft="#drawable/"
/>

How to add to an XML programatically by adding another View?

I am making an app similar in design to a Reddit/YouTube/Yahoo News app, it uses the API's to gather information on recent posts.
When you start the app, it displays all the recent posts exactly like this:
http://wpuploads.appadvice.com/wp-content/uploads/2014/07/screen1136x1136-68-576x1024.jpeg
The goal is to make all posts conform to a match_parent width and wrap_content height (max 300 dp height) and - just like the picture linked above - make all the posts conform to one look; Title on the top, body/picture in the middle and number of comments underneath.
Let's say my common View layout is something like this:
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:background="#ffffff"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Lesson 1"
android:textAllCaps="false"
android:textColor="#8c8c8c"
android:textSize="40dp"
android:gravity="center_horizontal"/>
<ImageButton
android:id="#+id/imageButton1"
android:background="#drawable/lesson1"
android:layout_width="250dp"
android:layout_height="150dp"
android:layout_gravity="center_horizontal" />
<TextView
android:layout_marginLeft="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="10 Comments"
android:textColor="#000000"/>
</LinearLayout>
I want to replicate this Layout style (Text, Image, Text) every time there is a new post and add it to the existing XML. How would I do this?

You would use a LayoutInflater to inflate the xml file into a View. Then you would add that view to the layout wherever you want it.

Android TimePicker - hour line is not align to center

I used Android TimePicker in my custom dialog.
The hours line is not align to center.
As you see the xml is look ok for center controller.
Is it possible at all to change the timepicker properties from custom dialog and not from FragmentDialog? How should i center it?
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:minHeight="50dp"
android:orientation="horizontal">
<TextView
android:id="#+id/titleDateAndTime"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:layout_gravity="center"
android:gravity="center"
android:text="Today"/>
<ImageView
android:id="#+id/changeDateAndTimeState"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:src="#drawable/arrow"/>
</LinearLayout>
<TimePicker
android:id="#+id/time_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"/>
<Button
android:id="#+id/date_time_set"
style="#style/Button.Buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/ripple_or_holo"
android:text="#string/call_reminder_set_button"/>
Custom dialog screenshot

The option to center each of the element inside the TimePicker is not supported.
My last resort was to make custom view for the time picker with my layout.

https://developer.android.com/reference/android/widget/TimePicker.html:
If you look here you will not find such methods or parameters.
Futher more, If you find a bug to setup this value, I do not, based on my experiance, really recommend to use something exapt default behavour. Because of there are a lot of different implementations for TimePicker.
Use the default behaviour or do nothing.
I only solutions: is to write your own timepicker using numberpicker, etc.

Button's style is adding unknown attribute - Android

I am trying to achieve the look of Facebook's event page and am having trouble copying their three buttons that say if a person is going to an event.
I am trying to achieve this,
Mine currently looks like this,
This is the XML for the buttons
<LinearLayout
android:id="#+id/button_holder"
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:paddingBottom="10dp">
<Button
android:id="#+id/button_going"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Going"
android:background="#drawable/item_left_button_background"/>
<Button
android:id="#+id/button_maybe"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Maybe"
android:background="#drawable/item_middle_button_background"/>
<Button
android:id="#+id/button_decline"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Decline"
android:background="#drawable/item_right_button_background"/>
</LinearLayout>
I do not know where the extra Padding or Margin is coming from above and below my buttons. I have tried android:padding="0dp" and android:layout_margin="0dp" on the buttons but it had no effect.
My best guess is it might have something to do with the layout_weight attribute. This may give the buttons a certain height based on their width, if this is the case then how can I make the buttons shorter?

AS you are applying the background item_left_button_background so that must be an image or selector which consists images those images have a specific height. When you give the button height as wrap_content it will take by default what is height of the image so as per my suggestion give a specific height to the button or create the background images as per your required sizes

Android: how to align two text views based on length of text

I have a layout in which two TextViews are to be displayed on the same line such that
If TextView1 is a short text, TextView2 should be immediately right to TextView1(IMAGE1) and if the TextView1 is a long text, TextView2 should be at right corner of the Layout on the same line(IMAGE2)
How can I achieve this ?

i use simple horizontal LinearLayout with android:layout_weight attribute and it worked like you want.
Example:
<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/text1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="teeeeeeeext1"/>
<TextView
android:id="#+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="text2"/>
</LinearLayout>

Use a layout like this..
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
<requestFocus />
</EditText>
<EditText
android:id="#+id/editText2"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="38dp"
android:layout_toRightOf="#+id/editText1" />
</RelativeLayout>
edittext 1 will push edittext2 to its right...depending on text in it..

You can set android:maxWidth property for first text view. So your layout would look like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="200dp"
android:text="sdfksdofsdfsdfsdfsadfgwagrswargweqrgeqrgqwergeqrgeqrg"
/>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/textView1"
android:text="text2"
/>

Edit:
I apparently misread (or did not read fully) your question. Just don't mind my answer - I vote for mxy's :)
The last time I had the same problem, I wasn't able to find or hack away a straightforward solution. Counting pixels was not an option (at least not for me). But I found a workaround that eventually led to the same display concept, and that was to use SpannableStringBuilder.
As I'm assuming you want two different TextViews because you want them to have different colors (or size, or style, or typeface).
The idea is to use a single TextView for the whole thing, and prepare a SpannableString before doing setText on your view.
By using combinations of ForegroundColorSpan, TextAppearanceSpan, etc, you can make your single TextView look like different TextViews with different styles, sitting side by side, wrapping to the next line as necessary.
Links:
Setting font color at runtime
TextAppearanceSpan sample