I'm really pulling my hair out over this one. Some background. I have a list of items that all have checkboxes next to them. When you deselect a checkbox, a button appears that allows you to delete the item from the list. This seems backwards at first but we only want "selected" items to be eligible for further processing, etc. This is my layout:
<RelativeLayout android:id="#+id/rlBlahBlah"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
xmlns:android="http://schemas.android.com/apk/res/android">
<CheckBox android:text=""
android:id="#+id/cbDeleteItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:focusable="false"
/>
<TextView android:text=""
android:id="#+id/tvItemText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14dip"
android:paddingLeft="3dip"
android:paddingRight="3dip"
android:paddingTop="13dip"
android:gravity="fill_vertical"
android:layout_toRightOf="#id/cbDeleteItem"
/>
<Button android:layout_height="wrap_content"
android:id="#+id/btnDelete"
android:text="Delete"
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:gravity="center_vertical"
android:focusable="false"
/>
</RelativeLayout>
I cannot get the 3 items to center vertically in my row to save my life. layout_gravity, gravity, layout_centerVertical, none of it works. I'm sure my issue is some tiny setting to flip somewhere, but I'm really at wits end on this.
edit: I know the textview is "fill_vertical", that's some random stuff I was trying.
This attribute worked for me centering a Button using RelativeLayout:
android:layout_centerInParent="true"
See this posting:
Can you center a Button in RelativeLayout?
Your problem is probably not due to the layout, but how you are inflating the layout. In fact, it might even be my fault, depending on where you learned your technique...
To quote the omnipresent Romain Guy:
the correct usage of inflate() in
adapters is:
inflate(layoutId, parent, false);
Passing the parent (given to you as a
parameter in getView()) allows the UI
toolkit to create the appropriate
LayoutParams object. Passing false
tells the toolkit to NOT call
parent.addView(theInflateChild), since
ListView will do its own magic later
on.
If you use inflate(layoutId, null), as I have traditionally advised, life is OK unless you try using RelativeLayout as the base layout of the rows and try to use vertical centering.
I will be updating my books and such to reflect the new advice in the coming weeks.
Using RelativeLayout, I had no luck with gravity nor layout_gravity.
But android:layout_centerVertical="true" worked for me positioned in the child of my RelativeLayout, so you can keep it if you need.
Here is a layout that ended up doing exactly what I wanted. I ditched RelativeLayout once I learned that it ignores layout_gravity attributes (of course now I can't find the post). Either way, nested LinearLayouts did the trick for me:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
android:id="#+id/llBlahBlahRowMain"
android:padding="6dip">
<CheckBox android:text=""
android:id="#+id/cbDeleteItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:focusable="false"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_vertical"
android:layout_height="wrap_content">
<TextView
android:text="blah blah dynamically replaced text"
android:id="#+id/tvItemText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="14dip"
android:paddingLeft="3dip"
android:layout_gravity="center_vertical"
/>
</LinearLayout>
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btnDelete"
android:text="Delete"
android:layout_gravity="center_vertical"
android:focusable="false"
/>
</LinearLayout>
Have you tried android:gravity="center_horizontal" as referenced here
I did an alternative solution, that worked for me. I put, on my textbox element, the property android:layout_height="fill_parent". This way, the text element filled all hieght of parent, so the contents were aligned correctly :)
<TextView android:id="#+id/principal_li_descricao"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:layout_marginLeft="10dip"
android:textColor="#ff000000"
android:layout_centerVertical="true"
android:gravity="center_vertical"
android:layout_alignBottom="#+id/principal_li_icone"
android:layout_toRightOf="#+id/principal_li_icone"/>
Thanks
Related
I apologize for this question may have been asked somewhere, but I'm not sure how to phrase it.
I have a ListView in my Android app and I want to align the content in each row so that each TextView is aligned with corresponding TextViews in rows below it (left, right, and center).
This picture is what I'm going for listview:
So, the left TextView is aligned all the way to the left and the right TextView is aligned all the way to the right. The center TextView is aligned such that it always "begins" at the same place (ie. it's position is not affected by the length of the left TextView).
How can I achieve this? Thanks a lot
use bellow like.. I have used first textview left, second center & third is right. You can change as your wish...
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="3">
<TextView
android:id="#+id/tv_textview"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left|center_vertical|center_horizontal"
android:text="AAP 500" />
<TextView
android:id="#+id/tv_textview2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center|center_vertical|center_horizontal"
android:text="85.65" />
<TextView
android:id="#+id/tv_textview3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="right|center_vertical|center_horizontal"
android:text="-3.75(-3.34 %)" />
</LinearLayout>
You'll want to use a LinearLayout with horizontal orientation then apply a weight to each of the textviews inside of it. this will cause them to each take a certain fraction of the layout. You can start by giving them each a weight of 1 and adjusting from there. The right-most textview will also need a right justification on the text to match the picture.
You have to create custom listView in that your item_row_view.xml will look like this
<?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"
android:orientation="vertical">
<TextView
android:id="#+id/tv_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_weight="1"
android:text="AAP 500"
android:textAlignment="center" />
<TextView
android:id="#+id/tv_textview2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="85.65"
android:textAlignment="center" />
<TextView
android:id="#+id/tv_textview3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="-3.75(-3.34 %)"
android:textAlignment="center" />
</RelativeLayout>
I dont have much knowledge of Android studio IDE, but i was asked to fix this problem, i thought there was a margin under the navigation bar but i cant identify the problem.
Endless CODE
<TextView android:layout_gravity="center_horizontal"
android:ellipsize="end"
android:singleLine="true"
android:height="15px"
android:gravity="center"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_marginBottom="55dip"
android:id="#+id/Tab.Title" android:text="#+id/Tab.Title"
style="#style/Tab.Title" />
<LinearLayout android:id="#+id/BottomBarLayout"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:background="#drawable/tb_background_bottom" android:scaleType="fitXY"
android:layout_alignParentBottom="true" android:weightSum="0"
>
<ImageButton android:layout_height="wrap_content"
android:id="#+id/PreviousBtn" android:layout_width="wrap_content"
android:background="#drawable/buttons_bottom"
android:src="#drawable/ic_btn_next" android:layout_weight="1">
</ImageButton>
<ImageButton android:layout_height="wrap_content"
android:id="#+id/NewTabBtn" android:layout_width="wrap_content"
android:background="#drawable/buttons_bottom"
android:src="#drawable/ic_btn_home" android:layout_weight="1"></ImageButton>
</LinearLayout>
Well I am assuming that either you want to shift the navigation bar to bottom most position or you want to make the background matter view shorter so that the navigation bar is the lowermost element on the screen.
You need to make use of android:layout_marginBottom="-5dp" for the linear layout.
You don't need to necessarily use android:layout_alignParentBottom="true" as the margin settings will override those alignments.
We can adjust the margins as per the view requirement. Try different margin values.
this .xml will be the layout of the item in the RecycleView list, but the last two Buttons are overlaying
<?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"
android:background="#Ffffff"
android:baselineAligned="false"
android:weightSum="1">
<LinearLayout android:id="#+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:layout_alignParentLeft="true"
android:background="#drawable/favorite"
android:layout_marginRight="5dip">
<ImageButton
android:id="#+id/imageButton"
android:layout_width="25dip"
android:layout_height="25dip"
android:background="#null"
android:src="#drawable/nofavorite"/>
</LinearLayout>
<TextView
android:id="#+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/thumbnail"
android:layout_toRightOf="#+id/thumbnail"
android:text="Rihanna Love the way lie"
android:textColor="#040404"
android:typeface="sans"
android:textSize="15dip"
android:textStyle="bold"/>
<TextView
android:id="#+id/artist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#343434"
android:textSize="10dip"
android:layout_toRightOf="#+id/thumbnail"
android:text="Just gona stand there and ..."
android:layout_below="#+id/text_view" />
<ImageButton android:layout_width="wrap_content"
android:id="#+id/update"
android:layout_height="wrap_content"
android:src="#drawable/nofavorite"
android:background="#null"
android:layout_alignRight="#+id/artist" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#null"
android:id="#+id/delete"
android:src="#drawable/favorite"
android:layout_alignRight="#+id/artist"
/>
</RelativeLayout>
they should be in the end of the right, in the end the DELETE button and in the left of this button but in the right end of the screen the UPDATE button, i will bind something to this buttons later
and another question, how can i make a divider btw the items?
thank you =)
It is because you use layout_alignRight="#+id/artist" on both images which essentially align right edges of the 2 images with the right edge of the View with id artist. To achieve what you want, use layout_alignParentRight="true" on the DELETE button and layout_toLeftOf="#+id/delete" on the UPDATE button. By the way, why do you need layout_weightSum on the parent. It only works with LinearLayout.
For making divider between items, you can either use a background with the left (right) border on one of the items or put a view between them.
Your buttons need to have attributes setting their position relatively to each other. At the moment, the only indication regarding their position is:
android:layout_alignRight="#+id/artist"
That is not enough to place your components since you are using a RelativeLayout (which is good). I suggest you play around with the parameters using the visual editor in you IDE.
One thing to keep in mind is that the component described last in your XML file is the one which should have the position attributes relativ to the other component. So in your case, your DELETE button.
I've tried several ways of doing this and failed each time.
What I want to acomplish is centering TextView (horizontally and vertically) on ImageView, but instead command android:layout_centerInParent="true" results in vertical and horizontal centering on the whole area, not on ImageView. Please help me with attaching parent to TextView or other way of solving this.
Here is my xml code:
<ImageView
android:id="#+id/imageView1"
android:layout_width="170dp"
android:layout_height="46dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:contentDescription="Your Height BG"
android:src="#drawable/textareabg" />
<TextView
android:id="#+id/textView00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Your Height"
android:textColor="#d88b6d"
android:textSize="20sp" />
It can be easily acheived using ConstraintLayout. Android recently introduced ConstraintLayout. It allows us to lay out child views using ‘constraints’ to define position based relationships between different views found in our layout. It is similar to RelativeLayout, but much more powerful than it because, ConstraintLayout reduces View Hierarchy to a greater extent. Now getting back to your question, Here is the sample xml code which does the work for you
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">
<ImageView
android:id="#+id/image"
android:layout_width="200dp"
android:layout_height="200dp"
android:src="#mipmap/ic_launcher"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintVertical_bias="0.1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Image"
android:textSize="20sp"
app:layout_constraintRight_toRightOf="#+id/image"
app:layout_constraintLeft_toLeftOf="#+id/image"
app:layout_constraintTop_toTopOf="#+id/image"
app:layout_constraintBottom_toBottomOf="#+id/image"/>
</android.support.constraint.ConstraintLayout>
Output View on Device
You can position the TextView anywhere on the ImageView using app:layout_constraintHorizontal_bias and app:layout_constraintVertical_bias. By default these values will be set to 0.5. So, it will be center aligned by default , if we don't specify any values.
When you add a constraint to both sides of a view (and the view size
for the same dimension is either "fixed" or "wrap content"), the view
becomes centered between the two anchor points by default.
Note: Bias attribute only works if you specify the constraints for the boundaries (e.g. top and bottom for vertical bias, left and right for horizontal bias)
More about ConstraintLayout
ConstraintLayout
Sample Project
Blog on ConstraintLayout
Try this way,hope this will help you to solve your problem.
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView1"
android:layout_width="170dp"
android:layout_height="46dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:contentDescription="Your Height BG"
android:src="#drawable/textareabg" />
<TextView
android:id="#+id/textView00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Your Height"
android:textColor="#d88b6d"
android:textSize="20sp" />
</FrameLayout>
Perhaps this would help you with your question
Android TextView text won't center
A person here mentions using android:gravity="center".
Here's what I would do
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="170dp"
android:layout_height="46dp"
android:layout_centerHorizontal="false"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:contentDescription="Your Height BG" />
<TextView
android:id="#+id/textView00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/imageView1"
android:layout_alignTop="#+id/imageView1"
android:layout_centerHorizontal="true"
android:layout_centerInParent="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:text="Your Height"
android:textColor="#d88b6d"
android:textSize="20sp" />
What you need to do is use FrameLayout.The doc says:
FrameLayout is designed to block out an area on the screen to display a single item. Generally, FrameLayout should be used to hold a single child view, because it can be difficult to organize child views in a way that's scalable to different screen sizes without the children overlapping each other. You can, however, add multiple children to a FrameLayout and control their position within the FrameLayout by assigning gravity to each child, using the android:layout_gravity attribute.
Child views are drawn in a stack, with the most recently added child on top. The size of the FrameLayout is the size of its largest child (plus padding), visible or not (if the FrameLayout's parent permits). Views that are GONE are used for sizing only if setConsiderGoneChildrenWhenMeasuring() is set to true.
So you need something like following psuedo layout code:
<FrameLayout>
<ImageView gravity="center">
<TextView gravity="center">
</FrameLayout>
Add one more relative layout under your layout like this :
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/imageView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/textView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
Check for width and height you want. Eg. If you want specific height and width for image, change height and width of this relative layout.
Thats it...
I am trying to align four equally sized squares on an Android Screen & I have now tried what feels like a million different approaches, yet none of them seem to work :(.
What I've got at the moment is the following:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="#+id/MasterLayout" android:layout_width="wrap_content" android:layout_height="fill_parent" android:background="#FFFFFF">
<TableLayout android:layout_width="fill_parent" android:id="#+id/mainlay" android:background="#444444" android:layout_weight="0.2" android:layout_height="wrap_content" android:padding="0dip">
<TableRow android:layout_weight="1" android:background="#BBBBBB" android:padding="0dip">
<ImageView android:id="#+id/ImageView1" android:layout_marginLeft="10px" android:layout_weight="1" android:layout_marginRight="5px" android:layout_height="wrap_content" android:layout_width="wrap_content" android:scaleType="centerInside" android:src="#drawable/bigbox_new"></ImageView>
<ImageView android:id="#+id/ImageView2" android:layout_marginLeft="5px" android:layout_weight="1" android:layout_marginRight="10px" android:layout_height="wrap_content" android:layout_width="wrap_content" android:scaleType="centerInside" android:src="#drawable/bigbox_new"></ImageView>
</TableRow>
<TableRow android:layout_weight="1" android:padding="0dip">
<ImageView android:id="#+id/ImageView3" android:layout_marginLeft="10px" android:layout_weight="1" android:layout_marginRight="5px" android:layout_height="wrap_content" android:layout_width="wrap_content" android:scaleType="centerInside" android:src="#drawable/bigbox_new"></ImageView>
<ImageView android:id="#+id/ImageView4" android:layout_marginLeft="5px" android:layout_weight="1" android:layout_marginRight="10px" android:layout_height="wrap_content" android:layout_width="wrap_content" android:scaleType="centerInside" android:src="#drawable/bigbox_new"></ImageView>
</TableRow>
</TableLayout>
</LinearLayout>
This basically does the job. However, every one of those four Images has a huge padding above and under it. How do I get rid of that? Or do I need to use a different Layout type alltogether?
To help illustrate my problem, here's a picture.
On the left is what I got, on the right is what I need.
Image
Thank you very much!
Cheers, Markus!
Remove layout_weight from your TableRows and set their layout_height to wrap_content. Then add an empty TableRow below them with layout_height set to fill_parent.
Try using the scaleType as centerCrop, if the image size is greater then this will do the trick for you. But this is not the best way to do it, better would be to change the image resources.
HTH !
Try setting the ImageView height to fill_parent, I think that should do the trick. Anyway, it would help if your XML properties were split in lines, it's hard for the rest of us to read a single line of properties.
Also, why do you place a TableLayout inside a LinearLayout? Unless you have more elements inside that Linear, you can get rid of it.