i am beginner to android programming and trying to build a simple app program.
whenever i try to make more than one views they stack on each other.
I am trying to make a text field and a button, but when i run it, the text field and button overlap each other however, i want them to be separated by some distance.
i am using the following code.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android1="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context="com.example.new1.MainActivity" >
<EditText android:id="#+id/edit_message"
android:layout_weight= "1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send" />
</RelativeLayout>
i am checking this code on Samsung Galaxy S2.
does anybody knows the solution to this problem and can guide me where i am doing it wrong.
Either use LinearLayout so that elements stack horizontally or vertically, or use attributes such as android:layout_toRightOf="#id/edit_message" to control placement within a RelativeLayout.
Find out more about LinearLayout here: http://developer.android.com/guide/topics/ui/layout/linear.html and RelativeLayout here: http://developer.android.com/guide/topics/ui/layout/relative.html
RelativeLayout positions views relative to each other. So if you do not specify the relationship between view, all the views will be put one above the other. You can either use LinearLayout with orientation attribute or define relationship between views. Following can be your working code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<EditText
android:id="#+id/edit_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:hint="#string/edit_message"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/edit_message"
android:text="#string/button_send" />
</RelativeLayout>
Here android:layout_toRightOf="#id/edit_message" lets your button to be positioned to right of your edittext
Depending on what you want, a horizontal layout or vertical, you need a fitting layout xml.
You use relativeLayout, where you have to specify the parents to layout like:
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
If your beginner better take a look at a linear layout in vertical or horizontal mode.
You dont have to specify this then.
Like this:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100"
>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/bResults"
android:text="Try Command"
android:layout_weight="20" />
<ToggleButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tbPassword"
android:layout_weight="80"
android:checked="true"
/>
</LinearLayout>
This will put your two buttons nexto each other
Related
So I'm creating a list view that grows and shrinks based off of the user input and I need four buttons but I don't know how to have buttons that are aligned with the bottom of the list view and are in a 2x2 grid fashion. I've already tried relative layout and it didn't seem to work. Thank you
I've created the XML according to what I believed you wanted to see.
Please check the following screen shot:
The following is the XML file:
<?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"
tools:context=".MainActivity">
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/button3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="BUTTON3"/>
<Button
android:id="#+id/button4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="BUTTON4"/>
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_above="#id/linearLayout1">
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="BUTTON1"/>
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="BUTTON2" />
</LinearLayout>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/linearLayout2">
</ListView>
</RelativeLayout>
As you can see that I am using the RelativeLayout as the base wrapper and within the RelativeLayout, I have 2 linearlayouts for the buttons (2 each) and finally the list view. The purpose for the LinearLayout is simply to add weight to the buttons so they would share the equal amount of horizontal space. If that does not fit your criteria, feel free to remove them. The main thing to learn is that relative layout allows you to use attributes such as alignParenBottom, layout_above, layout_below and so on. These attributes allow you to place your elements anywhere on the screen and adjust them according to these attributes.
Let me know if you have any questions.
Fairly new to java (a month into it or so).
If you where to look at instagram, they have images stacked on images, with comments, etc.
Looks like a XML layout is just copied and pasted on top of each other.
Is that what they are doing?
How can I do that?
FrameLayout & RelativeLayout let you stack Views above each other, the z index is by the order they are added in code or written in xml.
A layout is basically an extension of ViewGroup with rules, If you want to include another layout in a layout look into <include> and <merge> tags:
http://developer.android.com/training/improving-layouts/reusing-layouts.html
Here is an example using a FrameLayout and some TextViews. All the views' inside this FrameLayout will appear at the (0,0) coordinate but have an offset found in the dimension of the childs individual view's android:layout_marginLeft/android:layout_marginStart and android:layout_marginTop attributes
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:text="11111111"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="6dp"
android:layout_marginTop="6dp"
android:layout_marginStart="6dp" />
<TextView
android:text="2222222"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginTop="12dp"
android:layout_marginStart="12dp" />
<TextView
android:text="3333333"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="18dp"
android:layout_marginTop="18dp"
android:layout_marginStart="18dp" />
</FrameLayout>
And what it looks like:
Here is my layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/outerBox"
android:layout_width="wrap_content"
android:layout_height="fill_parent" >
<GridLayout
android:id="#+id/checksHere"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:columnCount="5"
android:columnWidth="100dp" />
<GridLayout
android:id="#+id/textHere"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/checksHere"
android:columnCount="4" />
<Button
android:id="#+id/submitButton"
android:layout_width="185dip"
android:layout_height="wrap_content"
android:layout_alignLeft="#id/outerBox"
android:layout_below="#id/textHere"
android:layout_margin="3dip"
android:onClick="submit"
android:text="#string/submit" />
<Button
android:id="#+id/cancelButton"
android:layout_width="185dip"
android:layout_height="wrap_content"
android:layout_below="#id/textHere"
android:layout_margin="3dip"
android:layout_toRightOf="#id/submitButton"
android:onClick="next"
android:text="#string/cancel" />
<Button
android:id="#+id/backButton"
android:layout_width="185dip"
android:layout_height="wrap_content"
android:layout_below="#id/textHere"
android:layout_margin="3dip"
android:layout_toRightOf="#id/cancelButton"
android:onClick="next"
android:text="test" />
</RelativeLayout>
I have a relative layout. The layout has two grid layouts at the top, which can be populated in my java code with text or checks. They can be blank. Then I have three buttons. The first two buttons display on the screen just fine. The third button just sits on top of the first button:
I changed the third button (backButton) to be toRightOf submitButton just to see what would happen. It goes on top of the cancelButton, as expected. I feel like I'm missing a simple fundamental, but I have not been able to figure it out.
Well this doesn't necessarily fix the problem with RelativeLayout, but you could always group the three buttons together in a single LinearLayout. This should prevent the buttons from overlapping.
I am not sure but when testing in eclipse changing all the android:layout_width="185dip" to android:layout_width="wrap_content" for buttons worked for me.
I have some problem with multiple screen support, I work with dp(dpi) for specify the layout_heigth and layout_width and I hope that is the better way to support multiple screen, but when I tried with two smartphone I meet two different result.
I give an example, this is a layout I use:
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/cities_main_layout"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="#+id/citieslist"
android:layout_width="wrap_content"
android:layout_height="320dip"
android:layout_gravity="center_vertical"
android:layout_below="#id/cities_main_layout"
/>
<LinearLayout
android:id="#+id/cities_button_layout"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/citieslist"
android:layout_gravity="center_vertical">
<Button
android:id="#+id/bycountry"
android:layout_height="50dip"
android:layout_width="105dip"
android:background="#drawable/buttonmarket"
android:text="#string/button_bycountry"
/>
<Button
android:id="#+id/top10"
android:layout_height="50dip"
android:layout_width="105dip"
android:background="#drawable/buttonmarket"
android:text="#string/button_top10"
/>
<Button
android:id="#+id/recommended"
android:layout_height="50dip"
android:layout_width="105dip"
android:background="#drawable/buttonmarket"
android:text="#string/button_recommended"
/>
</LinearLayout>
</RelativeLayout>
The button are at the bottom of the layout, and I see two different result:
http://img600.imageshack.us/img600/5513/htcmagicg2.png http://img600.imageshack.us/img600/5513/htcmagicg2.png
http://img441.imageshack.us/img441/6440/samsunggalaxys.png http://img441.imageshack.us/img441/6440/samsunggalaxys.png
In the last smartphone I can see the buttons, instead in the first I cannot...what's wrong?
I have to write a layout for any set of screen??!!!
Your ListView has
android:layout_height="320dip"
Now if the phone screen is smaller, it will not fit.
Try doing this instead: (Edited due to comments. This is displayed correcty in eclipse)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relative"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="#+id/listview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FF0000"
android:layout_above="#+id/linlay">
</ListView>
<LinearLayout
android:id="#+id/linlay"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="30dip"
android:background="#00FF00"
android:layout_alignParentBottom="true">
</LinearLayout>
</RelativeLayout>
Thant should fix it I think.
Cheers
As others have indicated, your problem is that you hardwired in a size for the ListView. If you want a business rule of "have the buttons at the bottom and have the ListView fill up the rest", you actually need to write code that implements "have the buttons at the bottom and have the ListView fill up the rest".
There are two main approaches here:
Use a LinearLayout parent for the buttons and the ListView. Use
android:layout_height="0px" and android:layout_weight="1" for the
ListView. Use a regular android:layout_height for the buttons (presumably in their own LinearLayout) and no
android:layout_weight for for them
Use a RelativeLayout parent for the buttons and the ListView.
Define the buttons as having android:layout_alignParentBottom="true".
Define the ListView as having android:layout_alignParentTop="true"
and android:layout_above="...", where the ... is the ID of the buttons' LinearLayout.
I would say it's because you are specifically declaring a height for your ListView and then laying the LinearLayout that holds your buttons at the bottom. Try changing it instead of being at the bottom of the ListView to something like
<LinearLayout
android:id="#+id/cities_button_layout"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:alignparentbottom="true"
android:layout_gravity="center_vertical">
I'm not entirely sure if align_parent_bottom is the 100% correct spelling of that.
Well, others have beaten me to it while I was typing, haha, but yeah, you're hardwiring a lot of things that shouldn't be, both the ListView and the Buttons. Take a look at this:
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/cities_main_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:id="#+id/cities_button_layout"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
>
<Button
android:id="#+id/bycountry"
android:layout_height="50dip"
android:layout_width="fill_parent"
android:layout_weight="1"
android:background="#drawable/buttonmarket"
android:text="#string/button_bycountry"
/>
<Button
android:id="#+id/top10"
android:layout_height="50dip"
android:layout_width="fill_parent"
android:layout_weight="1"
android:background="#drawable/buttonmarket"
android:text="#string/button_top10"
/>
<Button
android:id="#+id/recommended"
android:layout_height="50dip"
android:layout_width="fill_parent"
android:layout_weight="1"
android:background="#drawable/buttonmarket"
android:text="#string/button_recommended"
/>
</LinearLayout>
<ListView
android:id="#+id/citieslist"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#id/cities_button_layout"
/>
</RelativeLayout>
You have android:orientation on your RelativeLayout, which isn't actually an attribute that RelativeLayout contains.
You should use the layout_weight attribute rather than hardwiring sizes for the Buttons. In my example, all buttons have a width of fill_parent, and a weight of 1. This makes them distribute the space evenly.
List the fixed button layout first, setting it to alignParentBottom="true". Then set the ListView to fill_parent, and layout_above your button layout. This keeps the button layout at the bottom, and makes the ListView take all the space above your buttons.
Tada!
I want to create layout where I have two images at left and at right and text in center.
I have tried to do it with relative layout but unfortunetly it was unsuccessfully. Could anybody provide me an example?
Have you tried something like?
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/img1"
android:layout_width="50dip"
android:layout_height="50dip"
android:layout_alignParentLeft="true"
android:src="#drawable/image1"/>
<ImageView
android:id="#+id/img2"
android:layout_width="50dip"
android:layout_height="50dip"
android:layout_alignParentRight="true"
android:src="#drawable/image2"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/img1"
android:layout_toLeftOf="#id/img2"
android:layout_alignTop="#id/img1"
android:text="I'm between!"/>
</RelativeLayout>
If you don't need more things on your view, you could want to use LinearLayout instead, since it's more easier to implement. In that case, you just have to play with the layout_weight attribute.