CODEWITHSUNDEEP
android
Pooya
Pooya

Reputation: 531

Android float/double resource type

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?

Upvotes: 31

Views: 21909

Answers (3)

Alex Baker
Alex Baker

Reputation: 1627

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);

Upvotes: 20

Kirankumar Zinzuvadia
Kirankumar Zinzuvadia

Reputation: 1249

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.

Upvotes: 39

Bojan Kseneman
Bojan Kseneman

Reputation: 15668

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.

Upvotes: 18

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