I want to inflate some views but have a button at bottom of the view. I already know how to dynamically inflate views and then inflate the button below the other inflated views. However, when there are only a few inflated views (causing the combined view to take less space than an entire screen) the button does not rest at the bottom of the page as i would like. My idea is that i need to have the button aligned at the bottom of the relative layout by setting the button to: android:layout_alignParentBottom (when i try to do this though the app crashes)
here is a screenshot of what i have, followed by a screenshot of what i want, all the items you see are inflated onto a scrollview that is inside a relative layout. I think the problem is that the button is inflated onto the scrollview which is only as large at the items force it to be (unfortunately I'm too noob to know how to inflate onto a different part of the view)
the code for the image on the left is as follows (i dont have and errors for the view on the left):
parentView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#drawable/blurybg"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ScrollView
android:layout_height="wrap_content"
android:id="#+id/scrollView1"
android:layout_width="fill_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id= "#+id/parent_of_inflated_view_id">
</LinearLayout>
</ScrollView>
</RelativeLayout>
childButton (other views are similar to this)
<?xml version="1.0" encoding="utf-8"?>
<Button
xmlns:android="http://schemas.android.com/apk/res/android"
android:height="30dp"
android:layout_width="fill_parent"
android:background="#drawable/done"
android:layout_alignBottom ="#layout/availablerestaurants"
/>
Java for creating the inflator and inflating the button. other inflated views are similar to this (i use the same inflator of course). I am adding the inflated button last to get it at the bottom of the view.
LayoutInflater theInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
LinearLayout linLayout = (LinearLayout)findViewById(R.id.parent_of_inflated_view_id);
Button doneButtonCurrentRest= (Button) theInflater.inflate(R.layout.done_button_availrest, null);
linLayout.addView(doneButtonCurrentRest);
Thanks for the help,
Adam
Please check my code. It should work as intended:
<?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" >
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/parent_of_inflated_view_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />
</ScrollView>
<Button
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_alignParentBottom="true" />
</RelativeLayout>
What about your code. I can see several mistakes:
1) You should specify android:layout_height for your button. Without this parameter exception will be thrown. You use android:height but it is just not the same as android:layout_height.
2) android:layout_alignBottom should point to the id, but not to the layout. Moreover, i don't see the purpose of this attribute in the separate layout for button.
Update
Here is the solution for the question in the comment below:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true" >
<LinearLayout
android:id="#+id/layout_for_positioning"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/parent_of_inflated_view_id"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical" />
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_weight="0" />
</LinearLayout>
</ScrollView>
Note that i used android:fillViewport="true" for the ScrollView so it can fill the entire screen. Also i used android:layout_weight to stretch views properly (you can find the explanation of the attribute here).
Related
I have a login layout with two EditText and a Button. When I'm typing some text in EditText, as the keyboard open it overlap the some of my layout. I try to scroll up but not able to scroll up layout to be visible. Ｉ'm using Relative Layout to create it. How to solve it?
Thank you.
Place your EditTexts and Button inside a ScrollView. Whatever is inside ScrollView can be scrolled. So your problem will be solved.
Note that ScrollView can host only one child. So you have to place all your Views inside a ViewGroup like LinearLayout or RelativeLayout
Although Julia Zhao's answer is correct, it uses RelativeLayout. If you use RelativeLayout you have to do more work to make your Views appear one below the other. So I suggest you to use LinearLayout with android:orientation="vertical" inside it. It will automatically place one View below the other without any extra effort. So you won't issues like one View overlapping on other.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="UserName"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:hint="Password"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="Login"/>
</LinearLayout>
</ScrollView>
Try nesting everything in a ScrollView, hope this helps.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:id="#id/RLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
xmlns:android="http://schemas.android.com/apk/res/android"
>
// Your code
</RelativeLayout>
</ScrollView>
I have a layout something like this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="10dp"
android:background="#ff303f"
android:id="#+id/layout">
<ImageView
android:id="#+id/picture"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_centerInParent="true"/>
<Button
android:id="#+id/cancel"
android:layout_width="45dp"
android:layout_height="45dp"
android:layout_alignRight="#id/picture"
android:background="#drawable/cross_out"/>
</RelativeLayout>
I inflate it using the usual layout inflator service, set up some functionality to the button and an image to the imageview (all images are of same size and aspect ratio).
After that, I add this view to my fragment's layout which is nothing but a ScrollView which is a parent, it has a child linear layout that I call 'map' and simply add it to the map.
Expected : The added layouts should get added properly and I can scroll through it.
Actual : If more than 2 are added, the first one gets eaten up. I can see it half or sometimes it is completely eaten up. :\
Any idea whats going on here? Thanks a lot for your time.
EDIT:
Here's the layout file I add the inflated layout into:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f6ff45">
<LinearLayout
android:id="#+id/map"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#43ff44"
android:orientation="vertical"
android:layout_margin="10dp"
android:layout_gravity="center"
android:layout_marginTop="15dp">
</LinearLayout>
</ScrollView>
I also forgot to mention that after adding 3 or more of these layouts, I realized there's unnecessary empty space in the end. :\
If you have some android:layout_gravity or gravity property in your ScrollView, that may be the reason. Try deleting it, or make it center_horizontal.
Try this code for your layout file;
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f6ff45">
<LinearLayout
android:id="#+id/map"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#43ff44"
android:orientation="vertical"
android:layout_margin="10dp"
android:layout_gravity="center"
android:layout_marginTop="15dp">
</LinearLayout>
</ScrollView>
As I mentioned before, android:layout_gravity="center"in this LinearLayout causes this problem. Because it doesn't only horizontally center but also verticelly center the contents. It means when they are longer than the available height, the center part will appear. I only changed it into android:layout_gravity="center_horizontal" and the problem is fixed.
what changes shall I make to bring the relative layout in bottom?
<?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" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="86dp"
android:layout_alignParentBottom="true"
android:layout_weight="0.08"
android:gravity="bottom" >
</RelativeLayout>
</LinearLayout>
You need to change your parent Layout to be a RelativeLayout, since the attribute android:layout_alignParentBottom does nothing for LinearLayout children:
<?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" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="86dp"
android:layout_alignParentBottom="true" >
</RelativeLayout>
</RelativeLayout>
You can achieve that by using a FrameLayout instead of a LinearLayout since it stacks childs from top to bottom by default.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="86dp"
android:layout_gravity="bottom" >
</RelativeLayout>
</FrameLayout>
use
<?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" >
<!-- replace this by any other layout or view. You might want something here, right? -->
<View android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="86dp">
</RelativeLayout>
</LinearLayout>
There are two issues here. The first being that
android:gravity
is wrong. This sets the gravity for the contents of this Views children. So for example used in a TextView it would place the text at the bottom if the TextView. What you want instead is
android:layout_gravity
this sets the Views gravity within its parent.
The second problem is that android:gravity="bottom" doesn't work as you would expect in a LinearLayout who's orientation is vertical. I'm not sure I can explain why well so I will try to find a link in a bit that explains it. But if you change the orientation of the LinearLayout to horizontal you will see this.
So your best options are to change the orientation if that's a possibility and if not then change the root ViewGroup to a RelativeLayout and use the property android:alignParentBottom="true" as someone already suggested.
Edit for explanation
This blog post and this SO answer, among others explain it a little. But basically, if the orientation is horizontal then the Views are layed out from left to right as we expect so you can't control the left and right gravity. With a vertical orientation, the same is true for top and bottom gravity because where they are placed vertically is already determined by Android when you set that orientation. I hope this makes sense.
I've decided to use 2 RelativeLayouts for my app, one Layout for one portion of child Views on the screen to the left, the other for child Views to go to the right.
The problem is I don't know how to lay them out in XML so that the middle white space isn't included when I inflate my Layout.
This is what I want.
When I use 1 RelativeLayout, the middle white space is filled with the RelativeLayout, and I can't touch anything behind it.
Thank you very much for reading.
Do something similar to the following example.
This will create a LinearLayout with 2 RelativeLayouts using layout_weight to space the RelativeLayouts and then you can populate the RelativeLayouts with whatever you want.
The Buttons are just place holders for the example.
<?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="fill_parent"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" >
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TEST1" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" >
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TEST2" />
</RelativeLayout>
</LinearLayout>
I am new to Android and am reading Wrox's professional android 4 app dev book. In chapter 4 of the book it explains how to modify the existing text view. The problem i am facing is that the listview in my app hides the edit text box. Its hidden (can be seen in the background) but still works that is more stuff can be added to the list through it. Below is the code for my main activity xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<EditText
android:id="#+id/myEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="#string/addItemContentDescription"
android:hint="#string/addItemHint"
/>
<ListView
android:id="#+id/myListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
and my todolist_item xml
<?xml version="1.0" encoding="utf-8"?>
<com.example.wroxexample.ToDoListItemView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:scrollbars="vertical"
android:textColor="#color/notepad_text"
android:fadingEdge="vertical"
/>
The first option you have is to use a LinearLayout instead of a RelativeLayout.
<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<EditText
android:id="#+id/myEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="#string/addItemContentDescription"
android:hint="#string/addItemHint"
/>
<ListView
android:id="#+id/myListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
A RelativeLayout will allow you to position the elements relatively to the others.
On the other hand a LinearLayout will position the elements one below the other in the order they appear in the xml file.
The second option you have is to keep your RelativeLayout and just add the following tag to your ListView:
android:layout_below="#id/myEditText"
This will position the ListView below the EditText.
Try this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<EditText
android:id="#+id/myEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="#string/addItemContentDescription"
android:hint="#string/addItemHint"
android:layout_alignParentTop="true"
/>
<ListView
android:id="#+id/myListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/myEditText"/>
</RelativeLayout>
Use a LinearLayout and the property android:layout_weight
http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html
Try something like this:
<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/myListView"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:entries="#array/testea"
android:layout_height="wrap_content"/>
<EditText
android:id="#+id/myEditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/addItemContentDescription"
android:hint="#string/addItemHint"
/>
</LinearLayout>
This way ListView will grow to fill only the unused space.
Timothee got there before me but ill just add a little more.
you can, as he says, use a linear layout, or as user1387035 says, you can set the listview to be below the editText.
Relative Layout means "i want to lay things out relatively" and if you dont tell things where to go they will just float to where the 'gravity' is pulling them. The default gravity is top - so I'm guessing your items both ended up bunched at the top left?
As a rule of thumb - do you want your items to come one after another, bunched together (either horizontally or vertically)? if yes then use linear layout. If you want them to be pushed in different directions, use a relative layout. There are some exceptions, normally involving the "weight" attribute you can set in a linearlayout. (here's one I've just had to use: http://www.curious-creature.org/2010/08/15/scrollviews-handy-trick/)
If you have a Relative layout and are just using the layout_below/above attributes, without any 'alignParentBottom' or other thing set, then you probably just want a linearlayout
In your case I would say it sounds like you want Timothee's solution. If you want a little separation between the objects, you can use padding/margins to space them a little.
As for gravities, here is a useful blog entry that helped me get my head around LinearLayout's gravities (as well as generally): http://sandipchitale.blogspot.co.uk/2010/05/linearlayout-gravity-and-layoutgravity.html