Android screen size HDPI LDPI MDPI

Question

I have a background that I need fit in all screen sizes  I have three folders  hdpi  ldpi and mdpi for drawables  but in the emulator there isn t any referense to what resolution  hdpi is and what mdpi and ldpi are

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The documentation is quite sketchy as far as definitive resolutions go  After some research  here s the solution I came to  Android splash screen image sizes to fit all devices  It s basically guided towards splash screens  but it s perfectly applicable to images that should occupy full screen

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You should read Supporting multiple screens  You must define dpi on your emulator  240 is hdpi  160 is mdpi and below that are usually ldpi   Extract from Android Developer Guide link above   320dp  a typical phone screen  240x320 ldpi  320x480 mdpi  480x800 hdpi  etc     480dp  a tweener tablet like the Streak  480x800 mdpi     600dp  a 7    tablet  600x1024 mdpi     720dp  a 10    tablet  720x1280 mdpi  800x1280 mdpi  etc

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UPDATE  30 07 2014  If you use Android Studio  make sure you have at least 144x144 resource and than use  FILE-NEW-IMAGE ASSET   Android Studio will make proper image files to all folders for you        As documentation says  adjust bitmaps as follows   Almost every application should have alternative drawable resources for different screen densities  because almost every application has a launcher icon and that icon should look good on all screen densities  Likewise  if you include other bitmap drawables in your application  such as for menu icons or other graphics in your application   you should provide alternative versions or each one  for different densities   Note  You only need to provide density-specific drawables for bitmap files   png   jpg  or  gif  and Nine-Path files   9 png   If you use XML files to define shapes  colors  or other drawable resources  you should put one copy in the default drawable directory  drawable     To create alternative bitmap drawables for different densities  you should follow the 3 4 6 8 scaling ratio between the four generalized densities  For example  if you have a bitmap drawable that s 48x48 pixels for medium-density screen  the size for a launcher icon   all the different sizes should be   36x36 for low-density  LDPI   48x48 for medium-density  MDPI   72x72 for high-density  HDPI   96x96 for extra high-density  XHDPI   144x144 for extra extra high-density  XXHDPI   192x192 for extra extra extra high-density  XXXHDPI

[android] Android screen size HDPI, LDPI, MDPI

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