Example usage for android.util StateSet trimStateSet

Introduction

In this page you can find the example usage for android.util StateSet trimStateSet.

Prototype

public static int[] trimStateSet(int[] states, int newSize) 

Source Link

Usage

From source file:android.support.v7.content.res.AppCompatColorStateListInflater.java

/**
 * Fill in this object based on the contents of an XML "selector" element.
 *///  w  w w.  j  av  a2 s  .  c om
private static ColorStateList inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
        @NonNull AttributeSet attrs, @Nullable Resources.Theme theme)
        throws XmlPullParserException, IOException {
    final int innerDepth = parser.getDepth() + 1;
    int depth;
    int type;
    int defaultColor = DEFAULT_COLOR;

    int[][] stateSpecList = new int[20][];
    int[] colorList = new int[stateSpecList.length];
    int listSize = 0;

    while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
            && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) {
        if (type != XmlPullParser.START_TAG || depth > innerDepth || !parser.getName().equals("item")) {
            continue;
        }

        final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.ColorStateListItem);
        final int baseColor = a.getColor(R.styleable.ColorStateListItem_android_color, Color.MAGENTA);

        float alphaMod = 1.0f;
        if (a.hasValue(R.styleable.ColorStateListItem_android_alpha)) {
            alphaMod = a.getFloat(R.styleable.ColorStateListItem_android_alpha, alphaMod);
        } else if (a.hasValue(R.styleable.ColorStateListItem_alpha)) {
            alphaMod = a.getFloat(R.styleable.ColorStateListItem_alpha, alphaMod);
        }

        a.recycle();

        // Parse all unrecognized attributes as state specifiers.
        int j = 0;
        final int numAttrs = attrs.getAttributeCount();
        int[] stateSpec = new int[numAttrs];
        for (int i = 0; i < numAttrs; i++) {
            final int stateResId = attrs.getAttributeNameResource(i);
            if (stateResId != android.R.attr.color && stateResId != android.R.attr.alpha
                    && stateResId != R.attr.alpha) {
                // Unrecognized attribute, add to state set
                stateSpec[j++] = attrs.getAttributeBooleanValue(i, false) ? stateResId : -stateResId;
            }
        }
        stateSpec = StateSet.trimStateSet(stateSpec, j);

        // Apply alpha modulation. If we couldn't resolve the color or
        // alpha yet, the default values leave us enough information to
        // modulate again during applyTheme().
        final int color = modulateColorAlpha(baseColor, alphaMod);
        if (listSize == 0 || stateSpec.length == 0) {
            defaultColor = color;
        }

        colorList = GrowingArrayUtils.append(colorList, listSize, color);
        stateSpecList = GrowingArrayUtils.append(stateSpecList, listSize, stateSpec);
        listSize++;
    }

    int[] colors = new int[listSize];
    int[][] stateSpecs = new int[listSize][];
    System.arraycopy(colorList, 0, colors, 0, listSize);
    System.arraycopy(stateSpecList, 0, stateSpecs, 0, listSize);

    return new ColorStateList(stateSpecs, colors);
}

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From source file:com.bilibili.magicasakura.utils.ColorStateListUtils.java

protected static int[] extractStateSet(AttributeSet attrs) {
    int j = 0;/*from  w  ww.j  av  a 2 s  .com*/
    final int numAttrs = attrs.getAttributeCount();
    int[] states = new int[numAttrs];
    for (int i = 0; i < numAttrs; i++) {
        final int stateResId = attrs.getAttributeNameResource(i);
        switch (stateResId) {
        case 0:
            break;
        case android.R.attr.color:
        case android.R.attr.alpha:
            // Ignore attributes from StateListDrawableItem and
            // AnimatedStateListDrawableItem.
            continue;
        default:
            states[j++] = attrs.getAttributeBooleanValue(i, false) ? stateResId : -stateResId;
        }
    }
    states = StateSet.trimStateSet(states, j);
    return states;
}

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From source file:me.henrytao.mdcore.core.MdCompat.java

/**
 * A temporary fix for android.content.res.ColorStateList.inflate
 *///from www . j  a va 2  s.c  om
public static ColorStateList getColorStateList(Context context, int resId)
        throws IOException, XmlPullParserException {
    XmlResourceParser parser = context.getResources().getXml(resId);
    AttributeSet attrs = Xml.asAttributeSet(parser);
    Resources r = context.getResources();

    final int innerDepth = parser.getDepth() + 2;
    int depth;
    int type;

    List<int[]> customStateList = new ArrayList<>();
    List<Integer> customColorList = new ArrayList<>();

    while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
            && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) {
        if (type != XmlPullParser.START_TAG || depth > innerDepth || !parser.getName().equals("item")) {
            continue;
        }
        // Parse all unrecognized attributes as state specifiers.
        int j = 0;
        final int numAttrs = attrs.getAttributeCount();
        int color = 0;
        float alpha = 1.0f;
        int[] stateSpec = new int[numAttrs];
        for (int i = 0; i < numAttrs; i++) {
            final int stateResId = attrs.getAttributeNameResource(i);
            switch (stateResId) {
            case android.R.attr.color:
                int colorAttrId = attrs.getAttributeResourceValue(i, 0);
                if (colorAttrId == 0) {
                    String colorAttrValue = attrs.getAttributeValue(i);
                    colorAttrId = Integer.valueOf(colorAttrValue.replace("?", ""));
                    color = getColorFromAttribute(context, colorAttrId);
                } else {
                    color = ContextCompat.getColor(context, colorAttrId);
                }
                break;
            case android.R.attr.alpha:
                try {
                    alpha = attrs.getAttributeFloatValue(i, 1.0f);
                } catch (Exception e) {
                    String alphaAttrValue = attrs.getAttributeValue(i);
                    alpha = getFloatFromAttribute(context, Integer.valueOf(alphaAttrValue.replace("?", "")));
                }
                break;
            default:
                stateSpec[j++] = attrs.getAttributeBooleanValue(i, false) ? stateResId : -stateResId;
            }
        }
        stateSpec = StateSet.trimStateSet(stateSpec, j);
        color = modulateColorAlpha(color, alpha);

        customColorList.add(color);
        customStateList.add(stateSpec);
    }

    int[] colors = new int[customColorList.size()];
    int[][] states = new int[customStateList.size()][];
    int i = 0;
    for (int n = states.length; i < n; i++) {
        colors[i] = customColorList.get(i);
        states[i] = customStateList.get(i);
    }
    return new ColorStateList(states, colors);
}

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