Develop Reference

How to add another ImageView over an existing ImageView dynamically?

I know similar questions have been asked before but I think my case is different.
So I'm trying to make a playlist using a RecyclerView and when a song is selected I want the circular image which holds the Image for the song to change to a tick sign while the original image can be seen faded in the background. I have my tick image ready.
How can I add this image over my existing ImageView dynamically? The putting one image in the background method is not a solution for me because the music image file is loaded dynamically from Realm and thus can't be the background.
The XML code for my RecyclerView items is below:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingRight="10dp"
android:paddingLeft="30dp"
>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_gravity="start"
android:transitionName="albumArt"
android:id="#+id/album_art"
android:scaleType="centerCrop"
android:src="#color/colorPrimary"/>
<LinearLayout
android:layout_width="fill_parent"
android:gravity="right"
android:paddingLeft="20dp"
android:orientation="vertical"
android:layout_marginTop="20dp"
android:layout_height="wrap_content">
<TextView
android:id="#+id/data"
android:layout_width="match_parent"
android:fontFamily="sans-serif"
android:textColor="#ffffff"
android:text="Music Name"
android:textSize="17sp"
android:layout_height="wrap_content"
/>
<TextView
android:id="#+id/data_album"
android:layout_width="match_parent"
android:fontFamily="sans-serif"
android:textColor="#bfe0e0e0"
android:textSize="14sp"
android:text="Music Artist"
android:layout_height="wrap_content"
/>
</LinearLayout>
How can I do this dynamically from java code? Can this be done using set visibility somehow? If yes, please explain new ways to do this are appreciated as well.

You can make use of FrameLayout here and place both ImageViews inside the FrameLayout and based on condition you can make one of them visible and other invisible
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingRight="10dp"
android:paddingLeft="30dp"
>
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_gravity="start"
android:transitionName="albumArt"
android:id="#+id/album_art"
android:scaleType="centerCrop"
android:src="#color/colorPrimary"/>
<ImageView
android:id="#+id/imageView"
android:layout_width="120dp"
android:layout_height="120dp">
</ImageView>
</FrameLayout>
<LinearLayout
android:layout_width="fill_parent"
android:gravity="right"
android:paddingLeft="20dp"
android:orientation="vertical"
android:layout_marginTop="20dp"
android:layout_height="wrap_content">
<TextView
android:id="#+id/data"
android:layout_width="match_parent"
android:fontFamily="sans-serif"
android:textColor="#ffffff"
android:text="Music Name"
android:textSize="17sp"
android:layout_height="wrap_content"
/>
<TextView
android:id="#+id/data_album"
android:layout_width="match_parent"
android:fontFamily="sans-serif"
android:textColor="#bfe0e0e0"
android:textSize="14sp"
android:text="Music Artist"
android:layout_height="wrap_content"
/>
</LinearLayout>

Yes, it can be done by using set visibility. In your layout file, you will most likely need to use a Relative Layout so you can anchor both image views exactly the same. Then on the view you do not want to initially display, you make it invisible by adding the following:
android:visibility="invisible"
Then later on when you want to toggle the visibility on/off, you can use:
myImageView.setVisibility(View.VISIBLE);
myImageView.setVisibility(View.INVISIBLE);

android layout leaving small gaps

So I have a image view and below a relative layout. The desired is to always have the users see the text views and buttons in the nested layout. And the image is a top image ( not a full screen background) but some how there is a small gap and the background of the image is bleed past the image view. I have tried different Image scale types and different layouts completely(frame, all linear,etc..)
http://imgur.com/a/n4aIq
and some code
https://gist.github.com/whatkai/92f66d2322957d86dd3fe28a9a5d03c0
FYI layout-weights left gaps too.

There is too many ways to do it.
Try this solution using LinearLayout (orientation: vertical):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/REFragment"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:background="#color/accidentAssistanceColor">
<ImageView
android:id="#+id/SettingsImage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:contentDescription="#string/app_name"
android:scaleType="fitXY"
android:src="#drawable/ers"
android:layout_weight="1"/>
<LinearLayout
android:background="#color/appStartERSBackground"
android:layout_centerHorizontal="true"
android:id="#+id/onView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/SettingsImage"
android:gravity="bottom|clip_vertical|center"
android:orientation="vertical">
<Button
android:gravity="bottom|end"
android:layout_centerHorizontal="true"
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#android:color/transparent"
android:text="Not Now"
android:textColor="#color/white"/>
<Button
android:id="#+id/button2"
android:layout_centerHorizontal="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/button"
android:text="approve"
android:textColor="#color/white"/>
<TextView
android:gravity="center_horizontal|center_vertical"
android:id="#+id/text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/button2"
android:layout_gravity="center"
android:text="BLdfdsAH"
android:textColor="#color/white"/>
<TextView
android:gravity="center_horizontal|center_vertical"
android:id="#+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="BLAH"
android:textColor="#color/white"
android:textSize="20sp"
android:textStyle="bold"/>
</LinearLayout>
</LinearLayout>
And to answer you about how to scall your image i used android:scaleType fitXY to respect to ratio aspet.
If you desire to understand how every scallType works, see the following link:
https://robots.thoughtbot.com/android-imageview-scaletype-a-visual-guide

set view tag between your image and layout.
like this.
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#000000" />

Android custom row layout issue

Sorry in advance I need to include a few pictures to make my problem a little easier to understand. I am using a linear layout for my custom rows and it is giving me lots of trouble trying to get the rows to look how I want. Currently it looks like this
Please forgive the quick paint picture I am about to show but it is how I would like the layout to look.
I would like to add the name textbox above the dog picture, and a time stamp textbox above each of the 1 and 2. Whenever I try to add textboxes to display this it really messes with the layout. The textbox above the dog picture always wants to go to the right or left of the dog image and push the image to the middle of the page and the buttons get spread out further. I do not have much experience with this layout I typically do relative layout where I can drag and drop pieces. Any advise or help is greatly appreciated.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:layout_width="150dip"
android:layout_height="150dip"
android:id="#+id/dogimage"
android:clickable="true"
android:layout_alignParentLeft="true"
android:background="#drawable/dogpic"
android:onClick="sendProfile"
android:scaleType="fitXY" />
<ImageButton
android:layout_width="75dip"
android:layout_height="75dip"
android:id="#+id/dog1num1"
android:background="#drawable/num1"
android:clickable="true"
android:onClick="NumberOne"
android:layout_marginLeft="10dp"
android:layout_marginTop="75dp"
android:scaleType="fitXY" />
<ImageButton
android:layout_width="75dip"
android:layout_height="75dip"
android:id="#+id/dog1num2"
android:background="#drawable/num2"
android:clickable="true"
android:onClick="NumberTwo"
android:layout_marginLeft="10dp"
android:layout_marginTop="75dp"
android:scaleType="fitXY" />
</LinearLayout>

You need to wrap your imageview/textview combo in a LinearLayout. And you should set the imageButton using src, not background. Do it like this:
<?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">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Title" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:id="#+id/dogimage"
android:layout_width="150dip"
android:layout_height="150dip"
android:clickable="true"
android:onClick="sendProfile"
android:scaleType="fitXY"
android:src="#drawable/dogpic" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Timestamp 1" />
<ImageButton
android:id="#+id/dog1num1"
android:layout_width="75dip"
android:layout_height="75dip"
android:layout_marginLeft="10dp"
android:clickable="true"
android:onClick="NumberOne"
android:scaleType="fitXY"
android:src="#drawable/num1" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Timestamp 1" />
<ImageButton
android:id="#+id/dog1num2"
android:layout_width="75dip"
android:layout_height="75dip"
android:layout_marginLeft="10dp"
android:clickable="true"
android:onClick="NumberOne"
android:scaleType="fitXY"
android:src="#drawable/num2" />
</LinearLayout>
</LinearLayout>
</LinearLayout>

text sizes different Android phones

Since I have a Nexus 5, I'm seeing strange stuff regarding text sizes.
An example: I am creating listview items. I put a bigger text at 22sp, a smaller one at 17sp.
On my HTC One X it looks like this:
So I think "ok, that's nice!"
Then I run it on my Nexus 5:
I do not understand why this is happening? Shouldn't the 'sp' part make sure it will look ok
with the default values? I am not talking about the user increasing the font sizes in the settings, I've left everything to defaults.
Eventhough, if I would (don't hit me) use DP here to disable the font size changes for text, it will give the same result (not tested, but I am fairly certain this is the case from other tests).
What is the problem here? Is it the newer Android version, or is it the 1080p screen vs the 720p ?
Should I use different values for different DP using 'values' folder?
here is de layout:
<?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="80dp"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/background"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/image"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:adjustViewBounds="true"
android:scaleType="centerCrop" />
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:layout_weight="2">
<ImageView
android:id="#+id/arrow"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:adjustViewBounds="true" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
android:layout_toLeftOf="#id/arrow"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:fontFamily="sans-serif-condensed"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="#+id/address"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:textSize="17sp" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
</LinearLayout>

For instance, the default size for same SP value may vary depending on device, just to match its readability designed for the device.
The problem you got is because you have some elements sized to fixed size, post your XML code you use for the row and we can make a deep analyse.
Edit -- After xml
Well, instead of point you the wrongs, I did prefer to rebuild your layout, take a look:
<?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="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal" >
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
<TextView
android:id="#+id/name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/image"
android:layout_toLeftOf="#+id/arrow"
android:fontFamily="sans-serif-condensed"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="#+id/address"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/image"
android:layout_toLeftOf="#id/arrow"
android:layout_below="#id/name"
android:textSize="17sp" />
<ImageView
android:id="#id/arrow"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true" />
</RelativeLayout>
Your layout was too complex to a simple row... now the layout will be as tall as the TextViews needs it to be, and it is not a problem, as the user is already used with his text size.

you have to Create two different layout folder and see the result

ImageView: scale properly above Button

I'm new to Android and everything went well until now I have to deal with the layout.
What I want is this layout:
Layout how it should be:
The image should be properly scaled and keep its ratio.
That's why I tried this XML code, but it doesn't work the way I want. The image keeps its ratio but the left and right side are out of the screen when vertical and cut at the top and bottom when horizontal:
Layout how it is:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:orientation="vertical"
android:background="#color/background">
<ImageView
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:src="#drawable/logo"
android:gravity="center"
android:scaleType="centerCrop"
android:contentDescription="#string/app_logo"
android:layout_weight="2.5" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="4"
android:gravity="center">
<Button
android:id="#+id/id1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="20dp"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:text="#string/text1"
android:textSize="40sp"
/>
<Button
android:id="#+id/id2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:text="#string/text2"
/>
<Button
android:id="#+id/id3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:layout_gravity="center"
android:text="#string/text3" />
</LinearLayout>
</LinearLayout>
I googled a lot but just could not find what I was looking for.
Please help!

It looks like android:scaleType="fitCenter" is what you are looking for

you have to design 2 layout for you vertical state and horizontal state and put them in two different folder in your android project:
while you put your regular layout in the layout folder you should put the landscape layout in the layout-land folder.

Try setting android:scaleType="fitXY" to your ImageView.