I'm developing an android app for 2.2 ver.
My app must hav such structure:
[ Spinner here (fixed height) ]
[ ListView (not-fixed height) ]
[ ImageView (fixed-height) ]
I have to use only portrait orientation.
I use linearLayout for it. How can I calculate listView height to show spinner on the top of the screen, imageview on the bottom, and listview cover all free space, but not push others away from field of view.
It will be cool to make it dinamic for lots of screen resolutions.
Thank you
Use a relative layout to accomplish what you need.
<?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" >
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:src="#drawable/icon" />
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/spinner1"
android:layout_above="#+id/imageView1" />
</RelativeLayout>
By doing this listview will adjust its size so that it fits between the spinner and imageview on your screen
You need to use the android:layout_weight attribute on the variable-height item, so it fills the available space.
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
/>
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
Here is another way to do this, using weights. This may be the easiest approach.
You can put in to the weight a percentage of the screen you would like it to take up.
<?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:orientation="vertical" >
<Spinner
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="10"/>
<ListView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="80"></ListView>
<ImageView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="10"/>
</LinearLayout>
EDIT:
Now that i think about it, this will "fix" the size of all the widgets. They will be "fixed" at percentages of the screen. This will scale well with other screen sizes, but you did say you wanted ListView to not be fixed.
Related
everyone, first of all, I'm with a problem in my android project. I set an image as a layout background with the appropriate width (5.5), and when I run the application it appears white background instead of the intended image. The image is in at the drawable folder, all normal.
The image has the same dimensions of the layout (5.5)
Code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:background="#drawable/fundo"
android:orientation="vertical"
tools:context=".MainActivity">
<ImageView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="300dp"
android:layout_marginTop="200dp"
app:srcCompat="#drawable/logo_branco" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="450dp"
android:fontFamily="#font/advent_pro_thin"
android:text="O automóvel ideal para si!"
android:textColor="#E76C00"
android:textSize="20sp"
android:textStyle="bold" />
</RelativeLayout>
If you want to load a whole image, I'd use the approach of having an ImageView at the root ViewGroup of the layout with both dimensions set to match_parent.
This will solve the issue of the image not loading with an added benefit of being able to define scale type (like centerCrop) which enables you to have a picture with any side ratio and be sure it'll fill the screen both vertically and horizontally.
Edit:
Proposed solution:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
tools:context=".MainActivity">
<ImageView
android:id="#+id/background"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/fundo" />
<ImageView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="300dp"
android:layout_marginTop="200dp"
app:srcCompat="#drawable/logo_branco" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="450dp"
android:fontFamily="#font/advent_pro_thin"
android:text="O automóvel ideal para si!"
android:textColor="#E76C00"
android:textSize="20sp"
android:textStyle="bold" />
</RelativeLayout>
I managed to implement Cardviews in my app, but the cardview show an unnecessary padding in the top.
What i want to achieve is to get a header image like this :
Here's my cardview Layout file :
<android.support.v7.widget.CardView
android:id="#+id/programCardview"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="match_parent"
card_view:cardUseCompatPadding="true"
xmlns:card_view="http://schemas.android.com/apk/res-auto">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/programHeader"
android:layout_width="match_parent"
android:layout_height="160dp"
android:src="#drawable/createdprogramviewcard"/>
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp">
<TextView
android:id="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Programme d'endurance"
android:textSize="20sp"
android:textAlignment="center"/>
<TextView
android:id="#+id/objectif"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Objectif : " />
<TextView
android:id="#+id/programObjectif"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="6 séances"
android:layout_toRightOf="#id/objectif"/>
<TextView
android:id="#+id/programWorkouts"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textAlignment="textEnd"
android:layout_alignParentRight="true"
android:text="6 séances" />
</RelativeLayout>
</LinearLayout>
This is the code of the RecyclerView :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerViewPrograms"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
I manage to change the attribute cardUseCompatPadding but that not affect the internal form of the cardview, it's just there to separate them.
Thanks in advance.
I found a solution for my problem by changing the height of the imageView to 130dp. Apparently since i made the with of the image to match_parent, i had to find the exact height that will suit the image inside the cardview without giving it some extra padding.
The situation is due to two reasons, the first is that the height property of the CardView is in match_parent or in a larger size than the components occupy and at the same time the gravity property of the layout is in center.
To fix it just set the gravity of the LinearLayout to center | fill or just to fill.
I used these below attributes and it works for me.
card_view:cardElevation="0dp"
card_view:cardMaxElevation="0dp"
Or you can just use MaterialCardView instead of legacy CardView
I'm trying to set a analog clock for my app but both the analog clock and the digital clock just dont appear when i run the app on my device, but if i look at the graphic view of the layout its there!
Heres my code:
<?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:orientation="vertical"
android:weightSum="100" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="30" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
//Some Text Views and Edit Texts here!
</LinearLayout>
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_weight="20" >
<Space
android:layout_width="match_parent"
android:layout_height="2dp" />
<Button
android:text="Send"
android:id="#+id/bSendEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_weight="50" >
<Space
android:layout_width="match_parent"
android:layout_height="2dp" />
<AnalogClock
android:id="#+id/acClock"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="visible" />
</LinearLayout>
</LinearLayout>
My guess is that your layout is not scaling well to varied resolutions. Click the Preview All Screens option (in in the Graphical Layout section of Eclipse) to see if you can see the same cropping problem there. If so, you'll need to experiment with different layout weights, etc. to ensure that the layout works well across different device resolutions.
I guess problem can be about ScrollView. Try to change it and let me know result. Because I don't know for which reason its happening but sometimes with ScrollView view is getting hidden...
My current layout looks the following:
MY XML layout looks like:
<?xml version="1.0" encoding="utf-8"?>
<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" >
<TextView
android:id="#+id/tvLetter"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="3"
android:text=""
android:gravity="center"
android:textSize="#dimen/letter_size"
android:textColor="#FFFFFF"
android:background="#drawable/bd" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="1" >
<Button
android:id="#+id/colorButton"
android:layout_width="#dimen/btn_action"
android:layout_height="#dimen/btn_action"
android:layout_centerInParent="true"
android:background ="#drawable/colors"
android:layout_alignParentLeft="true" />
<Button
android:id="#+id/soundButton"
android:layout_width="#dimen/btn_action"
android:layout_height="#dimen/btn_action"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"
android:background="#drawable/sound" />
<Button
android:id="#+id/eraserButton"
android:layout_width="#dimen/btn_action"
android:layout_height="#dimen/btn_action"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:background="#drawable/eraser" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="2" >
<ImageView
android:id="#+id/ivIcon"
android:layout_width="#dimen/letter_icon"
android:layout_height="#dimen/letter_icon"
android:scaleType="fitXY"
android:layout_alignParentLeft="true"
android:background="#drawable/zebra" />
<LinearLayout
android:id="#+id/actionHolder"
android:layout_toRightOf="#+id/ivIcon"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="#+id/wordSound"
android:layout_width="#dimen/btn_action"
android:layout_height="#dimen/btn_action"
android:background="#drawable/sound" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
My #dimen/letter_icon is being used for different sizes based on the screen size. I am trying to make it compatible with both phone and tablet (different size screen). How do I achieve the following in my layout:
Let's say the ZEBRA text is inside a textview and the sound is in a button.
I am thinking the bottom ImageView has to be inside another layout, linearleayout maybe? and take up 3/4 of the space of the screen width.
Put your ZEBRA and SPEAKER buttons in vertical LinearLayout. Set buttons' height to match_parent and layout_weight to 1 and you should have what you want
and if you want to distribute width among your buttons' container and ImageView, set them width to match_parent and play with layout_weight there.
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,R.layout.activity_haltestellen, R.id.tvHaltestellen, HaltestellenListe);
lvH.setAdapter(arrayAdapter);
this is how the stuff is set and .xml:
<?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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
/>
I get the StringArray from a database.
so how can center the tv inside the listview? realy bad thing
Try to add this one: android:layout_centerInParent="true"
<TextView
android:id="#+id/tvHaltestellen"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
I'm not quite sure what do you want to do, but if you want to center the TextView inside the RelativeLayout then remove
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
from TV and try adding something like android:layout_centarInParent="true", and in the relative layout change match_parent to wrap_contents
You could anchor the TextView to the top and bottom of the ListView (and optionally left and right too, depending on the desired effect). That will make the TextView equally tall (and optionally wide), so use a center gravity to position the text in the middle.
<?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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/lvHaltestellen"
android:layout_alignBottom="#+id/lvHaltestellen"
android:layout_alignLeft="#+id/lvHaltestellen"
android:layout_alignRight="#+id/lvHaltestellen"
android:gravity="center" />
</RelativeLayout>
If you're planning to add a background colour to the TextView, you'll need to wrap it inside another transparent container (e.g. a FrameLayout), to avoid the colour from obscuring what's displayed in the list. Something like:
<?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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/lvHaltestellen"
android:layout_alignLeft="#+id/lvHaltestellen"
android:layout_alignRight="#+id/lvHaltestellen"
android:layout_alignTop="#+id/lvHaltestellen" >
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#android:color/black" />
</FrameLayout>
</RelativeLayout>
Alternatively, if you decide to make the ListView fill up the whole height of the RelativeLayout, you don't need to anchor the TextView to the list anymore. As already pointed out by #user1796624, you can then just center the TextView.
As per your earlier comment on someone else's answer:
the textview is shown inside the listview.
I understand what you're trying to say here, but please do realize that the TextView does not sit inside the ListView, but rather floats on top of it.