Java – How to get the value of a color property programmatically

How to get the value of a color property programmatically… here is a solution to the problem.

How to get the value of a color property programmatically

When I use resolveAttribute() to find the color value of ?attr/colorControlNormal, I get 236:

TypedValue typedValue = new TypedValue();
getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
int color = typedValue.data;
 236 

But when I use an XML layout with the following TextView element:

<TextView
  android:id="@+id/textView"
  style="?android:attr/textAppearance"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:textColor="?attr/colorControlNormal"
  android:text="@null" />

… and the following Java code:

View textView = findViewById(R.id.textView);
int color = ((TextView) textView).getCurrentTextColor();
 -1979711488

I get a color value of -1979711488


Why are these results different? I was expecting the same color value, but it wasn’t.

The second method (I believe) returns the correct color value. Why is my first method wrong?

I prefer to get the color value of ?attr/colorControlNormal without using the actual element. What should I do?

Solution

I believe not this :


    TypedValue typedValue = new TypedValue();
    getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
    int color = typedValue.data;

You should do this:


    TypedValue typedValue = new TypedValue();
    getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
    int color = ContextCompat.getColor(this, typedValue.resourceId)

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