I'm creating an app that uses an ImageView in the main activity that covers the whole width of the screen, the height should fit the image's resolution.
Here's my xml:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:adjustViewBounds="true"
android:id="#+id/bgImage"
android:scaleType="fitXY"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/bg_home_blue"/>
</RelativeLayout>
Here's what my layout looks like:
Everything seems to work fine but I don't know where these paddings are coming from, I've tried to change the scaleType but nothing seems to work.
Edit:
If I put instead of src just a blue background, the paddings go away and it fills the whole width (than I need to set a specific height as well)
I guess your image is png and have that space around it, even when your scaleType is FitXY it doesn't mean that it will remove the space around the png file, check that out and let us know what happened, or at least upload your image file
Related
I have a problem with my ImageButton because it appears to be resizing together with the source image. This is quite problematic because I'm using a TableLayout with equally weighted TableRows to achieve a uniform grid layout but for some reason, that particular ImageButton is resizing itself with the image and making that entire row appear bigger than the others even if they all have the same layout weight.
empty src:
https://gyazo.com/b50ab6d7afb6608db0505d701a2a40c9
with src, adjustViewBounds=true
https://gyazo.com/e2a2dae581d1fae4503b6e130ced776d
with src, adjustViewBounds=false
https://gyazo.com/2623f08fcffea586d5b7917332ae7291
XML Tag:
<ImageButton
android:id="#+id/stat_analyze"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/sp2_calc_button"
android:onClick="btnClicked"
android:src="#drawable/statistics_white"
android:adjustViewBounds="true"
android:scaleType="fitCenter"/>
Update:
So far, I've tried replacing the source image which is a png with a smaller version and with an android vector resource replacement but so far, I've still been stuck with the same results. I guess that means the only way to do this really is to lock the layout height. I've tried programatically setting the height at runtime but I still get the same result.
Update:
I tried once again, resizing the image to a fixed value. I noticed, however, that this particular button does not take up the whole area until it reaches a height quite far beyond the intended height. What I mean by this is for example, I set it to 60dp, the entire row will already begin to take up more space even if the button itself hasn't matched the parent height yet. I don't know why this is happening as this is the first time I've seen this happen. Can someone help me with this?
Have you tried the scaleType fitXY attribute:
android:scaleType="fitXY"
I have the following layout:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scrollbars="vertical"
android:text="text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:padding="5dip"
android:textColor="#ededed"
android:fadeScrollbars="true" />
</RelativeLayout>
In the code I use the following to set the maxWidth size which is customizable by the user:
textview.setMaxWidth(768);
The issue I'm facing is, the maxWidth setting only works up to what seems like 620px. Anything above that has no effect. If I set the textview width to 768px it stil has no effect but if I set the relative layout width to 768px then the textview maxWidth works above 620px.
So it seems the issue is the relative layout isn't wrapping as expected and is limiting the width. I don't want to have to set a static width on the relative layout as this would defeat the purpose (for my application) of using a maxWidth inside it. And this issue isn't device specific either, it seems to cap at that point on any device.
Does anyone have any ideas why this is happening or how I can work around it without specifying a static with for the relative layout?
Is the core issue that you would like the contents of your textView to wrap? If so, you might want to look here: How to line wrap Android TextView views?
I am trying to make a small image appear on my screen. I want it to be a small square. With the below code, it shows up as a long flat rectangle. I have attached a picture of what it looks like below.
java code
ImageView q1Image = (ImageView)findViewById(R.id.q1Image);
q1Image.setScaleType(ScaleType.FIT_XY);
xml code
<TableRow
android:id="#+id/row4"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1" >
<ImageView
android:id="#+id/q1Image"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_weight=".1"
android:textSize="8sp"
android:gravity="center_horizontal" />
EDIT
If I make the width and height equal to 50dp each, the image gets bigger but is still a flat looking rectangle.
Your scaling the Image wrong. Here are all scaletypes:
Top row (l-r) center, centerCrop, centerInside.
Bottom row (l-r): fitCenter, fitStart, fitEnd, fitXY.
You probably need fitCenter:
q1Image.setScaleType(ScaleType.FIT_CENTER);
FIT_XY will stretch your image to fit all yout ImageView.
Use scale type fitCenter to preserve aspect ratio by placing the image in center if your ImageView
q1Image.setScaleType(ScaleType.FIT_CENTER);
Refer to http://developer.android.com/reference/android/widget/ImageView.ScaleType.html
For other options.
Without the full layout XML this is just speculation, but seeing as you don't appear to have fixed the problem by changing the scale type, here are some other suggestions:
Wouldn't it be better if the layout_weight of the ImageView was zero?
Are you specifying android:stretchColumns on the TableLayout?
The image looks like it is being stretched to match the width of the text below. How many columns have you got in your table? It looks like the text in the other rows is in column 0 (as is the image in your first row) and the text in the first row is in column 1. If you want to leave column zero blank for the other rows, you need to specify android:layout_column on the text views.
So, I'm trying to view a camera preview as a background with an imageview on top of it. Check this question out, that I've asked, to get a better idea of what I'm trying to accomplish. However, instead of using a FrameLayout, I found it easier to use a RelativeLayout (for the reason of placing views where I want on the screen). The problem is that I can't get the imageview (over the surface view) to take up the whole screen. No matter how I re-size the image it still displays in the center without filling the screen.
So, my question is, how would I make the imageview fill the entire screen over the surface view? Perhaps, I am making a simple mistake but if that is the case please point it out. Any help will be greatly appreciated! Thanks!
Here's the XML file:
<?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"
android:id="#+id/relative" >
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/image"
android:src="#drawable/background" >
</ImageView>
<Button
android:id="#+id/scan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_margin="10dp"
android:text="Scan"
android:textSize="20dp"
android:textStyle="bold"
android:onClick="Scan" />
<Button
android:id="#+id/search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/scan"
android:layout_centerHorizontal="true"
android:layout_margin="10dp"
android:text="Search"
android:textSize="20dp"
android:textStyle="bold"
android:onClick="Search" />
<Button
android:id="#+id/importing"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/search"
android:layout_centerHorizontal="true"
android:layout_margin="10dp"
android:text="Import"
android:textSize="20dp"
android:textStyle="bold"
android:onClick="Import" />
</RelativeLayout>
And here's the code where I place the views (bring to front so they are visible over the surface view):
mPreview = new CameraPreview(this, mCamera);
relative.addView(mPreview);
layout.bringToFront();
scan.bringToFront();
search.bringToFront();
friendImport.bringToFront();
EDIT:
Here's an example image of what I'm talking about (I am trying to get the white transparent image to cover the whole screen):
Am I correct that you want to stretch android:id="#+id/image" into your entire layout?
First check in layout view that the ImageView takes entire space as it is supposed to.
If so, then add the proper scaling type to your ImageView attribute list:
android:scaleType="fitXY"
Or as an alternative, apply the image resource not as "src" but as "background":
android:background="#drawable/background"
Good luck.
After experimenting for a while, I seem to have found a solution to my problem. My image was showing up similar to this picture:
Which is weird, because this is how a 9-patch image works and I did not declare my image as a 9-patch. But even when I called match_parent (or even fill_parent) it only filled to the fill area like in the image I posted.
So, with lots of trial and error, I took away any border that was on the image and took all the blur effects off. The image was, for some reason, a dramatically smaller file size. Then, I tried to place this as the background and... success!
I'm not too sure as to why it did not work to begin with, but, I have a theory that, perhaps, because there was a 1px border on the image it saved it as a 9-patch PNG instead of a normal PNG file. Or maybe it was due to the blur effect that was on the image. I'm not too sure, but, I do know that once I took off the blur effects and removed the border it did work.
I hope this is useful for anyone who might be faced with a similar problem!
Can you help me to configure my layout? I don't achieve what I'm looking for:
I've put the imageview background to red for explain what I want:
The image's width is smaller than the layout width. I'd like the image grow proportionally keeping its aspect ratio until reach the aspect at the first image (I modified it manually with photoshop) but when setting width="fill_parent" the result is the second image and setting both width and height to "fill_parent" the result is the third image.
I tried to combine with ScaleType with no success
How can I achieve the first option? Thanks
Use android:adjustViewBounds=true attr in xml for ImageView
This question is solved here by extending the ImageView class.
Android ImageView adjusting parent's height and fitting width
I created a sample. It works for me. Here is the xml layout file.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:src="#drawable/hydrangeas"
android:layout_height="wrap_content" android:id="#+id/imageView1"
android:scaleType="centerInside"
android:adjustViewBounds="true"
android:background="#android:color/white"
android:layout_width="wrap_content"/>
</LinearLayout>
It works for fitCenter too. Have a look at the snapshot.
Use the attribute fit_center into your ImageView tag.
<ImageView ... android:scaleType="fitCenter" .. />