As I understood from available Android Resource types, there is no straight way to use float values as resources, unless you use some hacks such as the one mentioned in here. Is there any convention or something for this?
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try to define float or double as string and convert it to appropriate at run time.Hareshkumar Chhelana– Hareshkumar Chhelana2015-05-01 10:13:49 +00:00Commented May 1, 2015 at 10:13
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Android could provide Integer or Boolean type values the way that you mentioned, but why there are specific type values such as Integer or Boolean but not Float? what is the reason?Pooya– Pooya2015-05-01 10:33:27 +00:00Commented May 1, 2015 at 10:33
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Check out : stackoverflow.com/questions/29967258/…Hareshkumar Chhelana– Hareshkumar Chhelana2015-05-01 10:37:06 +00:00Commented May 1, 2015 at 10:37
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3 Answers
No, There is no direct resource type is provided for float/double.
But Yes there is two hacks to do that.
1) In dimens.xml
<item name="float" type="dimen" format="float">9.52</item>
Referencing from java
TypedValue typedValue = new TypedValue();
getResources().getValue(R.dimen.my_float_value, typedValue, true);
float myFloatValue = typedValue.getFloat();
And Second is as Bojan and Haresh suggested, To use value as string and parse it in your code at runTime.
1 Comment
M Moersalin
what if you use
<dimen name="your_param">9.52</dimen> is that doesn't work?Add a float to dimens.xml:
<item format="float" name="my_dimen" type="dimen">0.54</item>
To reference from XML:
<ImageView
android:alpha="@dimen/my_dimen"
...
To read this value programmatically you can use ResourcesCompat.getFloat from androidx.core
Gradle dependency:
implementation("androidx.core:core:${version}")
Usage:
import androidx.core.content.res.ResourcesCompat;
...
float value = ResourcesCompat.getFloat(context.getResources(), R.dimen.my_dimen);
Comments
Just save your double as a String resource
<string name="some_decimal">0.12154646</string>
And then just parse that in your code like this
double some_decimal = Double.parseDouble(context.getString(R.string.some_decimal));
You can also make your own type of resource values and get it from there like this
<item name="some_decimal" type="vals" format="float">2.0</item>
And then get it like this
TypedValue tempVal = new TypedValue();
getResources().getValue(R.vals.some_decimal, tempVal, true);
float some_decimal = tempVal.getFloat();
But it's impossible to get doubles like this and also I think that it's less performant than just simply parsing a string resource, so I prefer my first option.
