Selector中的各种状态详解

Android进阶之路 - selector状态选择器

selector原理简述过程

ViewStateUtil工具类

public class ViewStateUtil {
    /*//设置是否按压状态，一般在true时设置该属性，表示已按压状态，默认为false
    android:state_pressed
    //设置是否选中状态，true表示已选中，false表示未选中
    android:state_selected
    //设置是否勾选状态，主要用于CheckBox和RadioButton，true表示已被勾选，false表示未被勾选
    android:state_checked
    //设置勾选是否可用状态，类似state_enabled，只是state_enabled会影响触摸或点击事件，state_checkable影响勾选事件
    android:state_checkable
    //设置是否获得焦点状态，true表示获得焦点，默认为false，表示未获得焦点
    android:state_focused
    //设置触摸或点击事件是否可用状态，一般只在false时设置该属性，表示不可用状态
    android:state_enabled*/

    private static final int[] DRAWABLE_STATE_DEFAULT = new int[0];
    private static final int[] DRAWABLE_STATE_PRESSED = new int[]{android.R.attr.state_pressed};
    private static final int[] DRAWABLE_STATE_SELECTED = new int[]{android.R.attr.state_selected};
    private static final int[] DRAWABLE_STATE_CHECKED = new int[]{android.R.attr.state_checked};
    private static final int[] DRAWABLE_STATE_CHECKABLE = new int[]{android.R.attr.state_checkable};
    private static final int[] DRAWABLE_STATE_FOCUSED = new int[]{android.R.attr.state_focused};
    private static final int[] DRAWABLE_STATE_ENABLED = new int[]{android.R.attr.state_enabled};
    private static final int[] DRAWABLE_STATE_DISABLED = new int[]{-android.R.attr.state_enabled};

    private ViewStateUtil() {
    }

    public static Drawable createPressedSelector(Context context, int[] resource) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_PRESSED, AppCompatResources.getDrawable(context, resource[1]));
        drawable.addState(DRAWABLE_STATE_DEFAULT, AppCompatResources.getDrawable(context, resource[0]));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createPressedSelector(Drawable drawableNormal, Drawable drawablePressed) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_PRESSED, drawablePressed);
        drawable.addState(DRAWABLE_STATE_DEFAULT, drawableNormal);
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createPressedSelector(int colorNormal, int colorPressed) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_PRESSED, new ColorDrawable(colorPressed));
        drawable.addState(DRAWABLE_STATE_DEFAULT, new ColorDrawable(colorNormal));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createCornerPressedSelector(int colorNormal, int colorPressed, float corner) {
        StateListDrawable drawable = new StateListDrawable();
        GradientDrawable normal = new GradientDrawable();
        normal.setColor(colorNormal);
        normal.setCornerRadius(corner);
        GradientDrawable pressed = new GradientDrawable();
        pressed.setColor(colorPressed);
        pressed.setCornerRadius(corner);
        drawable.addState(DRAWABLE_STATE_PRESSED, pressed);
        drawable.addState(DRAWABLE_STATE_DEFAULT, normal);
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }


    public static Drawable createSelectedSelector(Context context, int[] resource) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_SELECTED, AppCompatResources.getDrawable(context, resource[1]));
        drawable.addState(DRAWABLE_STATE_DEFAULT, AppCompatResources.getDrawable(context, resource[0]));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createSelectedSelector(Drawable drawableNormal, Drawable drawableSelected) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_SELECTED, drawableSelected);
        drawable.addState(DRAWABLE_STATE_DEFAULT, drawableNormal);
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createSelectedSelector(int colorNormal, int colorSelected) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_SELECTED, new ColorDrawable(colorSelected));
        drawable.addState(DRAWABLE_STATE_DEFAULT, new ColorDrawable(colorNormal));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createCornerSelectedSelector(int colorNormal, int colorSelected, float corner) {
        StateListDrawable drawable = new StateListDrawable();
        GradientDrawable normal = new GradientDrawable();
        normal.setColor(colorNormal);
        normal.setCornerRadius(corner);
        GradientDrawable pressed = new GradientDrawable();
        pressed.setColor(colorSelected);
        pressed.setCornerRadius(corner);
        drawable.addState(DRAWABLE_STATE_SELECTED, pressed);
        drawable.addState(DRAWABLE_STATE_DEFAULT, normal);
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }


    public static Drawable createCheckedSelector(Context context, int[] resource) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_CHECKED, AppCompatResources.getDrawable(context, resource[1]));
        drawable.addState(DRAWABLE_STATE_DEFAULT, AppCompatResources.getDrawable(context, resource[0]));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createDisabledSelector(Context context, int[] resource) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_DISABLED, AppCompatResources.getDrawable(context, resource[2]));
        drawable.addState(DRAWABLE_STATE_PRESSED, AppCompatResources.getDrawable(context, resource[1]));
        drawable.addState(DRAWABLE_STATE_DEFAULT, AppCompatResources.getDrawable(context, resource[0]));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }

    public static Drawable createDisabledSelector2(Context context, int[] resource) {
        StateListDrawable drawable = new StateListDrawable();
        drawable.addState(DRAWABLE_STATE_DISABLED, AppCompatResources.getDrawable(context, resource[1]));
        drawable.addState(DRAWABLE_STATE_DEFAULT, AppCompatResources.getDrawable(context, resource[0]));
        drawable.setState(DRAWABLE_STATE_DEFAULT);
        return drawable;
    }


    public static ColorStateList createSelectedColorStateList(int normalColor, int selectedColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_SELECTED, DRAWABLE_STATE_DEFAULT}, new int[]{selectedColor, normalColor});
    }

    public static ColorStateList createSelectedColorStateList(int normalColor, int selectedColor, int disableColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_DISABLED, DRAWABLE_STATE_SELECTED, DRAWABLE_STATE_DEFAULT}, new int[]{disableColor, selectedColor, normalColor});
    }

    public static ColorStateList createPressedColorStateList(int normalColor, int pressedColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_PRESSED, DRAWABLE_STATE_DEFAULT}, new int[]{pressedColor, normalColor});
    }

    public static ColorStateList createPressedColorStateList(int normalColor, int pressedColor, int disableColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_DISABLED, DRAWABLE_STATE_PRESSED, DRAWABLE_STATE_DEFAULT}, new int[]{disableColor, pressedColor, normalColor});
    }

    public static ColorStateList createCheckedColorStateList(int normalColor, int checkedColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_CHECKED, DRAWABLE_STATE_DEFAULT}, new int[]{checkedColor, normalColor});
    }

    public static ColorStateList createCheckedColorStateList(int normalColor, int checkedColor, int disableColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_DISABLED, DRAWABLE_STATE_CHECKED, DRAWABLE_STATE_DEFAULT}, new int[]{disableColor, checkedColor, normalColor});
    }

    public static ColorStateList createDisableColorStateList(int normalColor, int disableColor) {
        return new ColorStateList(new int[][]{DRAWABLE_STATE_DISABLED, DRAWABLE_STATE_DEFAULT}, new int[]{disableColor, normalColor});
    }
}