TypedArray.getChangingConfigurations() for kitkat (API 19) or older versions

TypedArrayCompat.java

import android.content.res.TypedArray;
import android.util.TypedValue;

public final class TypedArrayCompat {
     /**
     * Return a mask of the configuration parameters for which the values in
     * this typed array may change.
     * Designed for API <21 
     *
     * @return Returns a mask of the changing configuration parameters, as
     * defined by {@link android.content.pm.ActivityInfo}.
     * @see android.content.pm.ActivityInfo
     */
    public static int getChangingConfigurations(TypedArray typedArray) {
        int changingConfig = 0;
        final int N = typedArray.length();

        for (int i = 0; i < N; i++) {
            final TypedValue value = typedArray.peekValue(i);

            if (value == null || value.type == TypedValue.TYPE_NULL) {
                continue;
            }

            changingConfig |= value.changingConfigurations;
        }

        return changingConfig;
    }