ARUNKUMAR: July 2013

Tuesday, July 30, 2013

Supporting apps in different screen sizes

Screen characteristic	Qualifier	Description
Size	`small`	Resources for small size screens.
	`normal`	Resources for normal size screens. (This is the baseline size.)
	`large`	Resources for large size screens.
	`xlarge`	Resources for extra large size screens.
Density	`ldpi`	Resources for low-density (ldpi) screens (~120dpi).
	`mdpi`	Resources for medium-density (mdpi) screens (~160dpi). (This is the baseline density.)
	`hdpi`	Resources for high-density (hdpi) screens (~240dpi).
	`xhdpi`	Resources for extra high-density (xhdpi) screens (~320dpi).
	`nodpi`	Resources for all densities. These are density-independent resources. The system does not scale resources tagged with this qualifier, regardless of the current screen's density.
	`tvdpi`	Resources for screens somewhere between mdpi and hdpi; approximately 213dpi. This is not considered a "primary" density group. It is mostly intended for televisions and most apps shouldn't need it—providing mdpi and hdpi resources is sufficient for most apps and the system will scale them as appropriate. If you find it necessary to provide tvdpi resources, you should size them at a factor of 1.33*mdpi. For example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi.
Orientation	`land`	Resources for screens in the landscape orientation (wide aspect ratio).
Orientation	`port`	Resources for screens in the portrait orientation (tall aspect ratio).
Aspect ratio	`long`	Resources for screens that have a significantly taller or wider aspect ratio (when in portrait or landscape orientation, respectively) than the baseline screen configuration.
Aspect ratio	`notlong`	Resources for use screens that have an aspect ratio that is similar to the baseline screen configuration.

You need to create different layout for diff screen size. Support all screen you need to create following layout:

Low density Small screens QVGA 240x320 (120dpi):

layout-small-ldpi (240x320)  
layout-small-land-ldpi (320x240)

Low density Normal screens WVGA400 240x400 (x432) (120dpi):

layout-ldpi  (240 x 400 )
layout-land-ldpi  (400 x 240 )

Medium density Normal screens HVGA 320x480 (160dpi):

layout-mdpi (320 x 480 )
layout-land-mdpi (480 x 320 )

Medium density Large screens HVGA 320x480 (160dpi):

layout-large-mdpi (320 x 480 )
layout-large-land-mdpi (480 x 320)

Galaxy Tab ( 240 dpi ):

layout-large  (600 x 1024) 
layout-large-land  (1024 x 600)

High density Normal screens WVGA800 480x800 (x854) (240 dpi):
```
layout-hdpi (480 x 800)
layout-land-hdpi (800 x 480)
```

Xoom (medium density large but 1280x800 res) (160 dpi):

layout-xlarge (800 x 1280)
layout-xlarge-land (1280 x 800)

Also add following code in .manifest file:

<supports-screens                                 
    android:smallScreens="true"                    
    android:normalScreens="true"         
    android:largeScreens="true"            
    android:xlargeScreens="true"             
    android:anyDensity="true" />

Toast show in center of screen

Toast mostly visible in bottom of screen. In bottom if we have any design then that toast will appear in front of our design. It's very irritating and annoying. so, Here i gave solution for that.

Toast toast = Toast.makeText(test.this,"www.arunkumarpd.blogspot.com", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();