Develop Reference

Android - How do I make the button taller in a linear layout?

I have a linear layout inside a relative layout, and I want to make the buttons 'taller' to fit the height of the linear layout.
I tried adding padding, as you can see in the screenshot, the layout is 'taller' but the buttons are not. I tried 'fill_parent', 'match_parent' but it didn't make a difference. How do I make the buttons expand in height?
<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:id="#+id/timerLayout">
<Chronometer
android:id="#+id/chronometer1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="48dp"
android:text="#string/chronometer"
android:textSize="50sp" />
<LinearLayout
android:id="#+id/buttonLayout"
android:orientation="horizontal"
android:paddingLeft="4.0dp"
android:paddingTop="50.0dp"
android:paddingRight="4.0dp"
android:paddingBottom="4.0dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/btnReset"
android:layout_width="0.0dp"
android:layout_height="fill_parent"
android:drawableLeft="#drawable/ic_restore_white_24dp"
android:drawableStart="#drawable/ic_restore_white_24dp"
android:text="#string/pause_btn"
android:layout_weight="1.5" />
<Button
android:id="#+id/btnStart"
android:layout_width="0.0dp"
android:layout_height="fill_parent"
android:text="#string/start_btn"
android:drawableLeft="#android:drawable/ic_media_play"
android:drawableStart="#android:drawable/ic_media_play"
android:layout_weight="1.5" />
<Button
android:id="#+id/btnSave"
android:layout_width="0.0dp"
android:layout_height="fill_parent"
android:text="#string/save_btn"
android:drawableLeft="#drawable/ic_save_white_24dp"
android:drawableStart="#drawable/ic_save_white_24dp"
android:layout_weight="1.0" />
</LinearLayout>

The extra space you are seeing is from the padding values in your linear layout, and your buttons are already filling the parent linear layout. But your linear layout has specified the following.
android:layout_height="wrap_content"
If you want to see buttons with a larger height, change the height value for your linear layout to something else like:
android:layout_height="300dp"

your linearlayout says height:wrap_content
so the child elements will takeup only as much space as specified.
Try giving either minHeight for linearlayout or simply remove linearlayout and in your buttons specifiy "alignparentbottom = true".
For left-most button give alignparentStart = true.

Take a look at your xml layout file very closely
<LinearLayout
android:id="#+id/buttonLayout"
android:orientation="horizontal"
android:paddingLeft="4.0dp"
android:paddingTop="50.0dp" //this guy
android:paddingRight="4.0dp"
android:paddingBottom="4.0dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
the android:paddingTop is the space on the top of every child in your LinearLayout so if you remove it the buttons will fit.

TextView above ImageView with dynamic height

I have a ScrollView with some elements.
My problem is that i can't set textview's above ImageView's with dynamical height.
I have 3 ImageView with different height, they can be visible or gone.
Above them i need to put text with background color, this text need to be at the bottom part of the ImageView
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/pic"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ImageView>
<TextView
android:id="#+id/third_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:padding="8dp"
android:layout_alignParentBottom="true"
android:layout_above="#id/third_picture"
android:gravity="center_horizontal"
android:background="#android:color/white"
android:text="example text">
</TextView>
I tried a lot, but my View was always broken.
Please help, i need some proffesional advise.

You can do this in textview:
android:layout_alignBaseline="#id/pic"
This will align the baseline of textview with basline of imageview

You can set your picture as a background for a layout (e.g linear layout ) rather than using an ImageView and then put the textview inside it and place it where ever you want.
<LinearLayout
android:background="your picture" >
<!-- align it to the bottom -->
<TextView
/>
</LinearLayout>

ImageView increases and decreases dynamically after the size of a textfield

I have a layout like this one:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tabBar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#272727"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/BtnSlide"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#null"
android:src="#drawable/lin" />
<TextView
android:id="#+id/textView1"
android:layout_width="275dp"
android:layout_height="50dp"
android:gravity="center"
android:paddingLeft="20dp"
android:paddingRight="100dp"
android:text="HEADER"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="2.2dp"
android:src="#drawable/logo" />
The ImageView is placed to the right of the screen. But I'm facing an issue, the ImageView increases and decreases in height and width depending on the length of the TextView, how can I make this work properly, without the ImageView changing size?

The problem here is that your ImageView matches the size of your parent, that is your LinearLayout (with id tabBar).
That LinearLayout wraps the content on his height, so, it sums all "heights" of his contents. The LinearLayout will take the height of TextView + the height of the ImageButton. Then, the ImageView will match that height.
A solution depends on what you are trying to do, but you can try to:
Set a predefined height in your ImageView
Use a RelativeLayout instead of a LinearLayout and align all your views depending on each other

My suggestion is to set layout_weight to all the components so that their size is fixed regardless of their contents:) See here for more details

Android: Align one element below and in the middle of another

I have an ImageView and TextView. I want to place the TextView below the image view but with the middle of the TextView aligned with the middle of the ImageView (along the horizontal axis). If the text in the TextView changes to something much larger or smaller, the middle of the text always needs to remain aligned with the middle of the ImageView. Is this possible in xml?

Yes, you are simply looking to contain both elements in a vertical LinearLayout which has android:gravity set to center_horizontal.
Something 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"
android:gravity="center_horizontal"
android:orientation="vertical"
... >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
... />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
... />
</LinearLayout>
Because the TextView's width is wrap_content, setting its gravity shouldn't be necessary. I would do it just for safety (and additionally, I may set the width to match_parent as well).

You can make use of RealtiveLayout as follows..
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
... >
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
... />
<TextView
android:layout_below="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
If you want your textview to be of single line only then add following properties to TextView
android:ellipsezed="end"
android:singleLine="true"
Use a given layout and add it to any of your existing layout you get result what your looking for ..
Hope this explanation works for you..

set TextView android:layout_width="fill_parent" and set android:gravity="center" in TextView.
I think it help you.
Thanks

android center textview in layout

I have a listview with custom rows. In the row there are these items:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView1"
android:layout_width="10dp"
android:layout_height="fill_parent"
android:focusable="false"
android:scaleType="fitXY">
</ImageView>"
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textsll"
android:layout_gravity="center_vertical"
android:gravity="center_vertical"
android:layout_marginLeft="5dp">
<TextView android:id="#+id/textView1"
android:layout_width="240dp"
android:layout_height="wrap_content"
android:textColor="#000000"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_centerVertical="true"
android:maxLines="1"
android:ellipsize="end">"
</TextView>
<TextView android:id="#+id/textView2"
android:layout_width="240dp"
android:layout_height="wrap_content"
android:textColor="#000000"
android:layout_alignParentBottom="true"
android:layout_below="#+id/textView1"
android:maxLines="1"
android:ellipsize="end">
</TextView>
</RelativeLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textsll2"
android:layout_gravity="center_vertical|right"
android:layout_marginLeft="10dp">"
<TextView android:id="#+id/textView3"
android:layout_width="40dp"
android:layout_height="wrap_content"
android:textColor="#000000"
android:paddingBottom="5dp"
android:maxLines="1"
android:ellipsize="end"
android:gravity="center_vertical"
android:background="#87EB81">
</TextView>
</LinearLayout>
</LinearLayout>
If both textviews has some content, they are centered vertically in the row (almost).
But if the lower textview is empty, I call:
holder.textView2.setVisibility(View.INVISIBLE);
holder.textView.setGravity(Gravity.CENTER_VERTICAL);
Still, the upper textview gets into the top of the row. Why?
If I set it to View.GONE, I get this, but I dont want the height of the row to change:

Use android:layout_weight to set all the childs of the main LinearLayout to mesure the same.
Use a LinearLayout as parent for textView1 and textView2. Use Use android:layout_weight to have the same size for each one.
Define TextView one with android:gravity="center_vertical|left" Then, if you don't want to show the second TextView, set its visibility as View.GONE.
Maybe this will resolve your problem,

Update:
In a RelativeLayout, views are aligned with their parent, with the RelativeLayout itself, or with other views. For instance, we declared that the description is aligned with the bottom of the RelativeLayout and that the title is positioned above the description and anchored to the parent's top. With the description GONE, RelativeLayout doesn't know where to position the title's bottom edge. To solve this problem, you can use a very special layout parameter called layout_alignWithParentIfMissing.
This boolean parameter simply tells RelativeLayout to use its own edges as anchors when a constraint target is missing. For instance, if you position a view to the right of a GONE view and set alignWithParentIfMissing to true, RelativeLayout will instead anchor the view to its left edge. In our case, using alignWithParentIfMissing will cause RelativeLayout to align the title's bottom with its own bottom.
For more look at Layout Tricks: Creating Efficient Layouts

This can be possible in your RelativeLayout by setting up the layout_below and layout_above with the help of parent alignment by using layout_centerInParent and set the value true of layout_centerHorizontal
Hope, this will work.

Try to use:
<TextView
...
android:layout_height="?android:attr/listPreferredItemHeight"
...
/>
in your_list_item.xml. And use View.GONE

Try to fix some value to your RelativeLayout's height like-
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textsll"
android:layout_gravity="center_vertical"
android:gravity="center_vertical"
android:layout_marginLeft="5dp">

To Solve for your problem what u can do is have the LinearLayout fill Parent.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
And use View.GONE This will make the Row Height Same.
If you see a gap after Best Car in World then try using Relative Layout and align last Layout to bottom.