I have a LinearLayout that has four views layed out horizontally. The first and last component are a set size. For the inner two views I want to just share the available space 50:50. I set each to a weight of "1" but when the views are layed out, the views are different sizes depending on the content they hold.
Here is my layout xml for reference.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/status"
android:src="#drawable/white"
android:paddingRight="10dip"
android:layout_height="35dip"
android:layout_width="35dip">
</ImageView>
<TextView android:id="#+id/name"
android:text="Name"
android:layout_height="fill_parent"
android:layout_toRightOf="#id/status"
android:layout_width="wrap_content"
android:layout_weight="1"
android:textSize="25dip">
</TextView>
<TextView android:id="#+id/description"
android:text="Description"
android:layout_toRightOf="#id/name"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:layout_weight="1"
android:textSize="25dip">
</TextView>
<TextView android:id="#+id/time"
android:text="Time"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_toRightOf="#id/description"
android:textSize="25dip">
</TextView>
</LinearLayout>
Obviously these aren't the actual column names but I changed them for privacy purposes. This layout is used by a ListView which changes the text of each view to be whatever value its presented. The name and description fields should line up since they're both given 50% of the remaining screen but when the name is longer the description is shifted right. Why?
For the weight to be considered, the layout dimension needs to be 0 (zero)
<TextView android:id="#+id/name"
android:text="Name"
android:layout_height="fill_parent"
android:layout_width="0dip"
android:layout_weight="1"
android:textSize="25dip">
</TextView>
I also recommend making your weight add up to either 1 (and use fractions) or 100.
So instead of 1 you would use either 50 or .5 for each view. The LinearLayout code will work properly with any weight sum, but it gets difficult if you want to modify your view later with additional sections.
Also, if you are not using relative layout, get rid of the toRightOf attributes. Less is more.
Try to use android:layout_width="fill_parent" instead of "wrap_content" in all children of LinearLayout. Or better yet, make such a structure in your xml:
<RelativeLayout>
<ImageView /> # status, fixed width, alignParentLeft="true"
<TextView /> # time, fixed width, alignParentRight="true"
<LinearLayout> # layout_width="fill_parent", toLeftOf="time" toRightOf="status"
<TextView /> # name, use layout_weight="1"
<TextView /> # description, use layout_weight="1"
</LinearLayout>
</RelativeLayout>
This should do what you want. Using LinearLayout instead of RelativeLayout might work too, but you have to experiment a bit (I believe using nested Layout, as in my example, will do the work).
Related
so I'm currently working on an app on Android, and I got stuck on a specific problem regarding the RelativeLayout, which I can't find a way to solve.
I have in the layout three views as follows: TextView, Textview and ImageView (laid horizontally), here is a screenshot of the ios counterpart:
the Textview at the middle should stick to the first one, until he gets to the Imageview, when he does, he keeps his minimum size (wrap content), while the first Textview truncate.
On IOS I setted priorities to the constraint to accomplish this, but I can't figure out how to solve this on Android.
Here what I tried:
<android.support.percent.PercentRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#drawable/daily_movie_title_box">
<TextView
android:id="#+id/daily_header_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="15dp"
android:text="New Text aawi oa ioawfwi"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#color/white"
android:lines="1"
android:singleLine="true"
android:layout_alignParentStart="true"
/>
<TextView
android:id="#+id/duration_text"
android:text="138 mins"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:textSize="13sp"
android:textColor="#color/white"
android:lines="1"
android:layout_alignBaseline="#id/daily_header_textview"
android:layout_toStartOf="#+id/certification_icon"
android:layout_toEndOf="#id/daily_header_textview"
/>
<ImageView
android:id="#id/certification_icon"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:src="#drawable/uk12a"
android:layout_alignBottom="#id/daily_header_textview"
app:layout_aspectRatio="100%"/>
</android.support.percent.PercentRelativeLayout>
Which resulted in this (which is what I want):
But when I increase the first Textview text it's not behaving as I desire...
Is it possible to achieve the behaviour I want in Android (keep the middle Textview wrap content, and truncate the first one if needed)?
I will post an update if I find a solution eventually, just wanted to see if anyone can find an easy way to achieve this behaviour, as I suspect there is.
Thanks.
From my understanding, you want the first TextView to be as large as possible, without adding space after the text if the text is too small. The second TextView should only wrap_content, but it should fill the rest of the parent layout when the row doesn't. The ImageView is set to wrap_content.
I tested it with this layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:shrinkColumns="0"
android:stretchColumns="1">
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:text="Shrinking text dddddddddddddddddddddd"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Midle column"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher"/>
</TableRow>
</TableLayout>
</LinearLayout>
The only problem is that if the second column has a incredibly large text, it will push the other views out of the parent. But in your case, I don't think that will be a problem. Otherwise, I think it does the job.
These are some suggested solutions:
You can use LinearLayout with horizontal orientation and weight for each component (TextViews and ImageView).
You can set the minimum and maximum text length for the second TextView.
But i prefer to apply the first solution. You can assign a weight for each component ( amount of space on the screen ) using:
android:layout_height
I often seem to make Android layouts that have a series of controls that are meant to sit one below the other. For example
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/a"/>
<TextView
android:id="#+id/b"
android:layout_below="#+id/a"/>
<TextView
android:id="#+id/c"
android:layout_below="#+id/b"/>
<TextView
android:id="#+id/d"
android:layout_below="#+id/c"/>
<TextView
android:id="#+id/e"
android:layout_below="#+id/d"/>
</RelativeLayout>
The android:layout_below attributes are necessary: without them the TextViews all bunch up together in the same place.
They are also, usually, redundant and a general source of bugs and tedium. As control IDs change, as controls are added and removed, all of these strings must be edited to match up properly. To illustrate the general redundancy of this scheme, note how it promotes this sort of spaghetti:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/e"
android:layout_below="#+id/d"/>
<TextView
android:id="#+id/b"
android:layout_below="#+id/a"/>
<TextView
android:id="#+id/d"
android:layout_below="#+id/c"/>
<TextView
android:id="#+id/a"/>
<TextView
android:id="#+id/c"
android:layout_below="#+id/b"/>
</RelativeLayout>
I can see how explicit layout_below directives (and friends such as layout_above) could be useful in some circumstances. But is there no way of configuring the layout (e.g. the RelativeLayout) to simply assume that the each control in the series that it contains should automatically layout_below the preceding control?
LinearLayout might be more suitable for this kind of UI structure. It does exactly what you need, and it does it automatically for you. All that you really have to specify is its android:orientation which can be either vertical or horizontal.
More information on LinearLayout can be found here.
All children of a LinearLayout
are stacked one after the other, so a vertical list will only have one
child per row, no matter how wide they are, and a horizontal list will
only be one row high (the height of the tallest child, plus padding).
Here's a quick example:
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/text_view_a"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hey, I'm TextView A!"/>
<TextView
android:id="#+id/text_view_b"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hey, I'm TextView B!"/>
<TextView
android:id="#+id/text_view_c"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hey, I'm TextView C!"/>
<!-- ..and so on. -->
</LinearLayout>
What you are looking for is LinearLayout with a vertical orientation.
I'm trying to create a simple component in my layout, where there are two TextViews horizontally next to each other. The one on the right should start where the one on the left finishes. My code for this is as follows:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:singleLine="true"
android:textColor="#android:color/white"
android:textIsSelectable="false"
android:textSize="25sp" />
<TextView
android:id="#+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:textColor="#android:color/white"
android:textSize="20sp" />
</LinearLayout>
I programmatically set the text on each TextView after the view has rendered. However, sometimes the text does not display correctly in the first TextView- I can see that the width has been set correctly, as the second TextView is not next to it, but the text is truncated rather than using the space. If I lock/unlock the device to refresh the screen then the text displays correctly (without the widths of the TextViews changing).
I've tried changing this to use a RelativeLayout, but I see the same issue.
Any ideas?
Although i dont understant what exactly you mean, would suggest you to use weightSum property in the parent view and android:layout_weight in child views. The same allows to put many child views inside a parent view with respect to ratio (like navigation tabs).
for eg :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1" >
<TextView
android:id="#+id/text1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:ellipsize="end"
android:singleLine="true"
android:textColor="#android:color/white"
android:textIsSelectable="false"
android:textSize="25sp"
android:layout_weight="0.4" /> //60% width
<TextView
android:id="#+id/text2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:textColor="#android:color/white"
android:textSize="20sp"
android:layout_weight="0.6" /> //40% width
</LinearLayout>
also, dont forget to put the width if child views as 0dp. as that will result in ignoring the calculations regarding the width of view. or you can set the width of child view as "match_parent" as well. any other property to width will not work. (and if you want half matchparent for both child views set layout_width to 0.5 both views.. ithink thats obvious to note)
Hopw it helps.
I use layoutopt like 'layoutopt layout.xml'
And I get this message:
9:18 This tag and its children can be replaced by one <TextView/> and a compound drawable
28:78 Use an android:layout_height of 0dip instead of wrap_content for better performance
But I do not understand the meaning, can someone clarify me the meaning of it
use 0dip on what? on the layout? I want my layout to wrap the content not to be zero size height
<LinearLayout android:id="#+id/linearLayout3"
android:layout_width="fill_parent" android:layout_height="0px"
android:layout_alignParentTop="true" android:background="#30000000"
android:padding="5dip">
<ImageView android:id="#+id/imageView1"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:background="#drawable/bzz_icon"></ImageView>
<TextView android:layout_width="fill_parent" android:id="#+id/textView1"
android:textColor="#FFFFFF" android:layout_height="wrap_content"
android:layout_gravity="center" android:gravity="left"
android:layout_marginLeft="15dip" android:text="#string/title"
android:textSize="20sp"></TextView>
</LinearLayout>
The first message is saying that you can replace your linearLayout3 with only a TextView and use android:drawableLeft instead of the ImageView.
The second message is probably telling you that on whatever is at line 28 of your layout you can use layout_height of 0dp instead of wrap_content. This is usually used in conjunction with layout_weight when your element will be expanded anyway. However, this is just a guess and you should post your entire layout XML, including line 28, so that we can better figure out the meaning of the message.
TextView with the left image and the text is centered
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center|left"
android:drawableLeft="#drawable/ic_launcher"
android:text="#string/hello" />
I am trying to layout 1 textview (upText) left aligned and 1 textview (downText) and an image view (image) both on the same line and right aligned.
how can I do that? I tried that, but both 'textview' and image view at left aligned.
<TextView
android:id="#+id/uptext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left"/>
<TextView
android:id="#+id/downtext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:singleLine="true"
android:gravity="right|bottom"/>
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right|bottom"/>
</LinearLayout>
Don't use a LinearLayout. Use a RelativeLayout, with
your first TextView set with android:layout_alignParentLeft="true"
your second TextView set with android:layout_alignParentBottom="true" and android:layout_alignParentRight="true"
something similar for your ImageView, which presently looks like it is going to overlap the second TextView
I realize this post is a bit old but just in case someone comes across this in their search for clarity;
The parent linear layout is where gravity needs to be specified for the child to align with the desired behavior which is why the above posts are explaining that linear layout is not possible for two separate behaviors to occur since a child cannot decide where to align itself within a linear layout.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="200dp"
android:layout_height="50dp"
android:gravity="bottom|right">
<TextView
android:layout_width="40dp"
android:layout_height="20dp"
android:text="test"/></LinearLayout>
It should also be said that the parent linear layout must have a defined size and not be wrap-content or this will not work since wrap content implies that there will be no extra space in the layout for positioning, so at least 'match-parent' for width and height is necessary as well as having a parent with a greater size than wrap-content for the child linear layout itself.
Hope this helps.
Using RelativeLayout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom">
<TextView
android:id="#+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="hi"
android:textStyle="bold|italic"
android:gravity="right"/>
<TextView
android:id="#+id/text2"
android:layout_below="#id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="All"
android:gravity="right"/>
</RelativeLayout>