Develop Reference

Why is my icon stretched on android devices?

All my icons have correct sizes and look perfect on iOS in unity but when installed on android devices, they appear stretched.
How should I fix this?

Android 6 Samsung Touchwiz launcher icons are bigger than of non samsung apps

Anbdroid stock Samsung icons are displayed bigger then non Samsung icons. I took a screenshot of my custom icon 144x144 px next to a stock Samsung browser icon, which is displayed at least 6 pixel larger.
The reason must be the .qmg decoded icon which is Samsung propietary. I have already looked for an .qmg encoder but there is no official way.
I tried the samsung theme designer for older Bada devices which is able to create qmg files (I have replaced the background with my desired icon and exported the whole theme, replaced the ending to .zip and exported my background) Samsung Theme Designer. Unfortunately android is not able to decode my created icon.
Is there a way to stretch a normal app icon to the same oversize like the stock Samsung icon or is there another way to encode a .qmg icon? I have found a decoder only tool on xda-developers: [TOOL] Converter QMG/ASTC->PNG, which uses the decoder on the device to create png files.
Update
I did some research and noticed a really strange thing. If I create an empty Icon with a thin single boarder, the icon will be stretched to the same size like the Samsung icons. If I fill up the icon content, it will be shrinked.
Is this a Samsung Touchwiz behaviour or a general Android 6 issue? I don't have any non Samsung phones on my pool to test it.

Found the solution in a stock Samsung Application AndroidManifest.xml
You need to add the following line into the <application> tag in the mainfest.
<meta-data android:name="com.samsung.android.icon_container.has_icon_container" android:value="true"/>
This works with *.png and *.qmg icons too.

Android Transparant color works differently on different devices

I'm have a fragment whose BG should be semi transparent. So, I'm using <color name="transparent75">#BF000000</color> which is 75% black transparency.
It looks good on Samsung S4, but it is too transparent on Sony device. I'm googling from a while and couldn't get any proper solution.
Any solutions much appreciated.

I don't think every screen was made equal. I have tried comparing white background on nexus 5 and Samsung s4, the result is different.
I found a discussion about color reproduction here. Maybe this is what you're experiencing right now.
The screen technology is different between the nexus 5 and 6. The 5 uses an IPS screen that is backlit and is generally considered superior at reproducing whites, and colors tend to be more life-like.
The nexus 6 has an Amoled screen - it is not back lit, with each pixel lighting up individually. Amoled screens are great at reproducing blacks, and are also generally more saturated when it comes to colors. - Jakshadows26

Android background shows circle

I'm facing a problem in rendering the layout background image attached here on higher resolution devices.On few devices it shows well but fails on certain devices.
a) Samsung Galaxy grand renders the background with no circles.
b) Samsung Galaxy s II shows circles in plain background image.
I need to show an consistent image on all device versions.I hope 9 patch image will resolve this problem. Let me know your suggestions further to fix these problem.
Thanks in advance.

Your image is absolutely fine. I'm also pretty sure all of these devices display them correctly and in full color (in custom ROMs you can force Android to use 16-bit color mode which can cause color banding but I believe it's not your case).
I think color bandindg you see on certain devices is caused by low quality LCD matrices used in these phones which are not capable to display full gamut of your gradient.
You can find bad LCD screens even in phones believed to be "top devices". In my experience the worst color banding of gradients is on ASUS devices. Transformer TF101 is just so-so, but on Nexus7 even default wallpaper (the one with colorful blurred stuff) looks ugly. In contrary to these devices, Samsung's Nexus10 has a sharp and vivid screen with no banding.
Usually, the more is brightness, the less is contrast, leading to color banding. IIRC Samsung devices have various screen color profile presets, you can try to play with them.

Android: Difference in appearance

hope this will be a quick easy question, I've just tried my app on my old phone and it looks better (personal oppinion) on my older HTC Desire then my newer Samsung SII. The main part is the rounding of corners on most things. Do you know where that is coming from? Manufacture or Droid Version? and can I force the rounded corners without resorting to massive amounts of effort on the samsung, and I presume most handsets?
HTC is v2.2.2
samsung is v2.3.4

What you are seeing here are manufacturer specific themes. HTC Devices run the so called Sense UI. While on Samsung devices you find TouchWiz.
If you want to have the Sense UI look & feel on Samsung Devices you indeed need to resort to (massive) amounts of efforts by creating your own theme or custom widget styles.
Cheers
Renard

As you probably know Samsung has implemented his own Android interface, such as HTC. The image quality is due to the difference between HDPI, MDPI and LDPI scrrens.
The best way to get rounded corners is to create a new style for you widgets.
Google something like "android:background style spinner".
Regards.