java类android.graphics.drawable.StateListDrawable的实例源码

private void update() {
    StateListDrawable background = new StateListDrawable();
    background.addState(new int[]{android.R.attr.state_pressed}, createDrawable(backgroundColorPressed, cornerColorPressed, cornerWidth, cornerRadius));
    background.addState(new int[]{-android.R.attr.state_enabled}, createDrawable(backgroundColorDisabled, cornerColorDisabled, cornerWidth, cornerRadius));
    background.addState(StateSet.WILD_CARD, createDrawable(backgroundColor, cornerColor, cornerWidth, cornerRadius));
    setBackground(background);

    setTextColor(new ColorStateList(
            new int[][]{
                    new int[]{android.R.attr.state_pressed},
                    new int[]{-android.R.attr.state_enabled},
                    new int[]{}
            },
            new int[]{
                    textColorPressed,
                    textColorDisabled,
                    textColor
            }
    ));
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private Drawable createFillDrawable() {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{android.R.attr.state_pressed}, createRectDrawable(mColorPressed));
    drawable.addState(new int[]{}, createRectDrawable(mColorNormal));

    if (Util.hasLollipop()) {
        RippleDrawable ripple = new RippleDrawable(new ColorStateList(new int[][]{{}},
                new int[]{mColorRipple}), drawable, null);
        setOutlineProvider(new ViewOutlineProvider() {
            @Override
            public void getOutline(View view, Outline outline) {
                outline.setOval(0, 0, view.getWidth(), view.getHeight());
            }
        });
        setClipToOutline(true);
        mBackgroundDrawable = ripple;
        return ripple;
    }

    mBackgroundDrawable = drawable;
    return drawable;
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void setBackgroundColor(int colorPressed, int colorNormal){
    StateListDrawable sd = new StateListDrawable();
    int[] state_pressed = new int[]{android.R.attr.state_pressed};
    int[] state_normal = new int[]{android.R.attr.state_enabled};

    GradientDrawable pressed = new GradientDrawable();
    pressed.setColor(colorPressed);
    pressed.setCornerRadius(10);

    GradientDrawable enable = new GradientDrawable();
    enable.setColor(colorNormal);
    enable.setCornerRadius(10);

    sd.addState(state_pressed, pressed);
    sd.addState(state_normal, enable);
    bg.setBackground(sd);
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    void onActionDown() {
        if (mUsingStyle) {
            mBackgroundDrawable = getBackground();
        }

        if (mBackgroundDrawable instanceof StateListDrawable) {
            StateListDrawable drawable = (StateListDrawable) mBackgroundDrawable;
            drawable.setState(new int[]{android.R.attr.state_pressed});
        } else if (Util.hasLollipop() && mBackgroundDrawable instanceof RippleDrawable) {
            RippleDrawable ripple = (RippleDrawable) mBackgroundDrawable;
            ripple.setState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed});
            ripple.setHotspot(getMeasuredWidth() / 2, getMeasuredHeight() / 2);
            ripple.setVisible(true, true);
        }
//        setPressed(true);
    }

/**
 * create state list drawable
 *
 * @param context
 * @param idNormal
 * @param idPressed
 * @param idFocused
 * @param idUnable
 * @return
 */
public static StateListDrawable createStateListDrawable(Context context, int idNormal, int idPressed, int idFocused, int idUnable) {
    StateListDrawable bg = new StateListDrawable();
    Drawable normal = idNormal == -1 ? null : context.getResources().getDrawable(idNormal);
    Drawable pressed = idPressed == -1 ? null : context.getResources().getDrawable(idPressed);
    Drawable focused = idFocused == -1 ? null : context.getResources().getDrawable(idFocused);
    Drawable unable = idUnable == -1 ? null : context.getResources().getDrawable(idUnable);
    // View.PRESSED_ENABLED_STATE_SET
    bg.addState(new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled}, pressed);
    // View.ENABLED_FOCUSED_STATE_SET
    bg.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, focused);
    // View.ENABLED_STATE_SET
    bg.addState(new int[]{android.R.attr.state_enabled}, normal);
    // View.FOCUSED_STATE_SET
    bg.addState(new int[]{android.R.attr.state_focused}, focused);
    // View.WINDOW_FOCUSED_STATE_SET
    bg.addState(new int[]{android.R.attr.state_window_focused}, unable);
    // View.EMPTY_STATE_SET
    bg.addState(new int[]{}, normal);
    return bg;
}

public void setCircleButtonStateListDrawable(View circleButton, int radius,int color) {
    WeakReference<Bitmap> imageNormal = new WeakReference<>(Bitmap.createBitmap(2 * radius, 2 * radius, Bitmap.Config.ARGB_8888));
    Canvas canvasNormal = new Canvas(imageNormal.get());
    Paint paintNormal = new Paint();
    paintNormal.setAntiAlias(true);
    paintNormal.setColor(color);
    canvasNormal.drawCircle(radius, radius, radius, paintNormal);
    StateListDrawable stateListDrawable = new StateListDrawable();
    stateListDrawable.addState(StateSet.WILD_CARD, new BitmapDrawable(circleButton.getContext().getResources(), imageNormal.get()));
    if (android.os.Build.VERSION.SDK_INT >= 16) {
        circleButton.setBackground(stateListDrawable);
    } else {
        circleButton.setBackgroundDrawable(stateListDrawable);
    }

}

/**
 * Generate bg drawable drawable.
 *
 * @param radii        the radii
 * @param pressColor   the press color
 * @param defaultColor the default color
 * @return the drawable
 */
public static Drawable generateRoundDrawable(Resources res, float radii, int pressColor, int defaultColor) {

    radii = dpToPx(res, radii);

    //外环的圆角矩形
    float[] outRadii = new float[]{radii, radii, radii, radii, radii, radii, radii, radii};//四个角的 圆角幅度,8个可以设置的值,每个角都有2个边 2*4=8个

    //按下状态
    Shape roundRectShape = new RoundRectShape(outRadii, null, null);//圆角背景
    ShapeDrawable shopDrawablePress = new ShapeDrawable(roundRectShape);//圆角shape
    shopDrawablePress.getPaint().setColor(pressColor);//设置颜色

    //正常状态
    Shape roundRectShapeNormal = new RoundRectShape(outRadii, null, null);
    ShapeDrawable shopDrawableNormal = new ShapeDrawable(roundRectShapeNormal);
    shopDrawableNormal.getPaint().setColor(defaultColor);

    StateListDrawable bgStateDrawable = new StateListDrawable();//状态shape
    bgStateDrawable.addState(new int[]{android.R.attr.state_pressed}, shopDrawablePress);//按下状态
    bgStateDrawable.addState(new int[]{}, shopDrawableNormal);//其他状态

    return bgStateDrawable;
}

/**
 * 正常 圆角边框;
 * 按下 圆角色块
 */
public static Drawable generateBorderDrawable(float radii, float borderWidth, int pressColor, int defaultColor) {

    //外环的圆角矩形
    float[] outRadii = new float[]{radii, radii, radii, radii, radii, radii, radii, radii};//四个角的 圆角幅度,8个可以设置的值,每个角都有2个边 2*4=8个
    RectF inset = new RectF(borderWidth, borderWidth, borderWidth, borderWidth);

    //按下状态
    Shape roundRectShape = new RoundRectShape(outRadii, null, null);//圆角背景
    ShapeDrawable shopDrawablePress = new ShapeDrawable(roundRectShape);//圆角shape
    shopDrawablePress.getPaint().setColor(pressColor);//设置颜色

    //正常状态
    Shape roundRectShapeNormal = new RoundRectShape(outRadii, inset, outRadii);
    ShapeDrawable shopDrawableNormal = new ShapeDrawable(roundRectShapeNormal);
    shopDrawableNormal.getPaint().setColor(defaultColor);

    StateListDrawable bgStateDrawable = new StateListDrawable();//状态shape
    bgStateDrawable.addState(new int[]{android.R.attr.state_pressed}, shopDrawablePress);//按下状态
    bgStateDrawable.addState(new int[]{}, shopDrawableNormal);//其他状态

    return bgStateDrawable;
}

public YearPickerView(Context context, DatePickerController controller) {
    super(context);
    this.mController = controller;
    this.mController.registerOnDateChangedListener(this);
    setLayoutParams(new LayoutParams(-1, -2));
    Resources res = context.getResources();
    this.mViewSize = res.getDimensionPixelOffset(R.dimen.mdtp_date_picker_view_animator_height);
    this.mChildSize = res.getDimensionPixelOffset(R.dimen.mdtp_year_label_height);
    setVerticalFadingEdgeEnabled(true);
    setFadingEdgeLength(this.mChildSize / 3);
    init(context);
    setOnItemClickListener(this);
    setSelector(new StateListDrawable());
    setDividerHeight(0);
    onDateChanged();
}

/**
 * 通过代码配置一个selector XML对象 . <br>
 * @author liulongzhenhai 2012-7-4 上午10:45:03 <br>
 * @param normal 没有状态
 * @param pressed 按下状态
 * @param focused 获取焦点状态
 * @param unable 无状态
 * @return 返回selector 的对象布局
 */
public static StateListDrawable getNewSelector(final Drawable normal, final Drawable pressed,
                                                  final Drawable focused, final Drawable unable) {
    final StateListDrawable bg = new StateListDrawable();
    // View.PRESSED_ENABLED_STATE_SET
    bg.addState(new int[] { android.R.attr.state_pressed, android.R.attr.state_enabled }, pressed);
    // View.ENABLED_FOCUSED_STATE_SET
    bg.addState(new int[] { android.R.attr.state_enabled, android.R.attr.state_focused }, focused);
    // View.ENABLED_STATE_SET
    bg.addState(new int[] { android.R.attr.state_enabled }, normal);
    // View.FOCUSED_STATE_SET
    bg.addState(new int[] { android.R.attr.state_focused }, focused);
    // View.WINDOW_FOCUSED_STATE_SET
    bg.addState(new int[] { android.R.attr.state_window_focused }, unable);
    // View.EMPTY_STATE_SET
    bg.addState(new int[] {}, normal);
    return bg;
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private Drawable createFillDrawable() {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{-android.R.attr.state_enabled}, createCircleDrawable(mColorDisabled));
    drawable.addState(new int[]{android.R.attr.state_pressed}, createCircleDrawable(mColorPressed));
    drawable.addState(new int[]{}, createCircleDrawable(mColorNormal));

    if (Util.hasLollipop()) {
        RippleDrawable ripple = new RippleDrawable(new ColorStateList(new int[][]{{}},
                new int[]{mColorRipple}), drawable, null);
        setOutlineProvider(new ViewOutlineProvider() {
            @Override
            public void getOutline(View view, Outline outline) {
                outline.setOval(0, 0, view.getWidth(), view.getHeight());
            }
        });
        setClipToOutline(true);
        mBackgroundDrawable = ripple;
        return ripple;
    }

    mBackgroundDrawable = drawable;
    return drawable;
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private Drawable createFillDrawable() {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{android.R.attr.state_pressed}, createRectDrawable(mColorPressed));
    drawable.addState(new int[]{}, createRectDrawable(mColorNormal));

    if (Util.hasLollipop()) {
        RippleDrawable ripple = new RippleDrawable(new ColorStateList(new int[][]{{}},
                new int[]{mColorRipple}), drawable, null);
        setOutlineProvider(new ViewOutlineProvider() {
            @Override
            public void getOutline(View view, Outline outline) {
                outline.setOval(0, 0, view.getWidth(), view.getHeight());
            }
        });
        setClipToOutline(true);
        mBackgroundDrawable = ripple;
        return ripple;
    }

    mBackgroundDrawable = drawable;
    return drawable;
}

private void initIdleStateDrawable() {
    int colorNormal = getNormalColor(mIdleColorState);
    int colorPressed = getPressedColor(mIdleColorState);
    int colorFocused = getFocusedColor(mIdleColorState);
    int colorDisabled = getDisabledColor(mIdleColorState);
    if (background == null) {
        background = createDrawable(colorNormal);
    }

    StrokeGradientDrawable drawableDisabled = createDrawable(colorDisabled);
    StrokeGradientDrawable drawableFocused = createDrawable(colorFocused);
    StrokeGradientDrawable drawablePressed = createDrawable(colorPressed);
    mIdleStateDrawable = new StateListDrawable();

    mIdleStateDrawable.addState(new int[]{android.R.attr.state_pressed}, drawablePressed.getGradientDrawable());
    mIdleStateDrawable.addState(new int[]{android.R.attr.state_focused}, drawableFocused.getGradientDrawable());
    mIdleStateDrawable.addState(new int[]{-android.R.attr.state_enabled}, drawableDisabled.getGradientDrawable());
    mIdleStateDrawable.addState(StateSet.WILD_CARD, background.getGradientDrawable());
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private Drawable createFillDrawable() {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{android.R.attr.state_pressed}, createRectDrawable(mColorPressed));
    drawable.addState(new int[]{}, createRectDrawable(mColorNormal));

    if (Util.hasLollipop()) {
        RippleDrawable ripple = new RippleDrawable(new ColorStateList(new int[][]{{}},
                new int[]{mColorRipple}), drawable, null);
        setOutlineProvider(new ViewOutlineProvider() {
            @Override
            public void getOutline(View view, Outline outline) {
                outline.setOval(0, 0, view.getWidth(), view.getHeight());
            }
        });
        setClipToOutline(true);
        mBackgroundDrawable = ripple;
        return ripple;
    }

    mBackgroundDrawable = drawable;
    return drawable;
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    void onActionDown() {
        if (mUsingStyle) {
            mBackgroundDrawable = getBackground();
        }

        if (mBackgroundDrawable instanceof StateListDrawable) {
            StateListDrawable drawable = (StateListDrawable) mBackgroundDrawable;
            drawable.setState(new int[]{android.R.attr.state_pressed});
        } else if (Util.hasLollipop() && mBackgroundDrawable instanceof RippleDrawable) {
            RippleDrawable ripple = (RippleDrawable) mBackgroundDrawable;
            ripple.setState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed});
            ripple.setHotspot(getMeasuredWidth() / 2, getMeasuredHeight() / 2);
            ripple.setVisible(true, true);
        }
//        setPressed(true);
    }

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    void onActionUp() {
        if (mUsingStyle) {
            mBackgroundDrawable = getBackground();
        }

        if (mBackgroundDrawable instanceof StateListDrawable) {
            StateListDrawable drawable = (StateListDrawable) mBackgroundDrawable;
            drawable.setState(new int[]{});
        } else if (Util.hasLollipop() && mBackgroundDrawable instanceof RippleDrawable) {
            RippleDrawable ripple = (RippleDrawable) mBackgroundDrawable;
            ripple.setState(new int[]{});
            ripple.setHotspot(getMeasuredWidth() / 2, getMeasuredHeight() / 2);
            ripple.setVisible(true, true);
        }
//        setPressed(false);
    }

/**
 * Tests the {@link Coloring#createMultiStateDrawable(Drawable, Drawable, Drawable, boolean)} method.
 * <p>
 * Unfortunately some Drawable properties are not shadowed by Robolectric yet, so we can test only the basic stuff here.
 */
@Test
public final void testCreateMultiStateDrawable() {
    // noinspection deprecation - can't enforce Lollipop here
    final BitmapDrawable normal = (BitmapDrawable) mActivityContext.getResources().getDrawable(android.R.drawable.btn_star_big_on);
    assertNotNull("Normal drawable is null", normal);

    // noinspection deprecation - can't enforce Lollipop here
    final BitmapDrawable clicked = (BitmapDrawable) mActivityContext.getResources().getDrawable(android.R.drawable.btn_star_big_off);
    assertNotNull("Clicked drawable is null", clicked);

    // noinspection deprecation - can't enforce Lollipop here
    final BitmapDrawable checked = (BitmapDrawable) mActivityContext.getResources().getDrawable(android.R.drawable.star_off);
    assertNotNull("Checked drawable is null", checked);

    final StateListDrawable stateList = Coloring.createMultiStateDrawable(normal, clicked, checked, true);
    assertNotNull("Contrast state drawable is null", stateList);
    assertTrue("Contrast state drawable is not stateful", stateList.isStateful());
    final Drawable.ConstantState constantState = stateList.getConstantState();
    assertNotNull("Constant state is null", constantState);
}

public StateListDrawable build(Context ctx) {
    StateListDrawable stateListDrawable = new StateListDrawable();

    GradientDrawable normal = (GradientDrawable) ContextCompat.getDrawable(ctx, R.drawable.action_item_badge);
    GradientDrawable selected = (GradientDrawable) normal.getConstantState().newDrawable().mutate();

    normal.setColor(mColor);
    selected.setColor(mColorPressed);

    if (mStroke > -1) {
        normal.setStroke(mStroke, mStrokeColor);
        selected.setStroke(mStroke, mStrokeColor);
    }

    if (mCorners > -1) {
        normal.setCornerRadius(mCorners);
        selected.setCornerRadius(mCorners);
    }

    stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, selected);
    stateListDrawable.addState(StateSet.WILD_CARD, normal);

    return stateListDrawable;
}

public static boolean containsNinePatch(Drawable drawable) {
    drawable = getWrapperDrawable(drawable);
    if (drawable instanceof NinePatchDrawable
            || drawable instanceof InsetDrawable
            || drawable instanceof LayerDrawable) {
        return true;
    } else if (drawable instanceof StateListDrawable) {
        final DrawableContainer.DrawableContainerState containerState = ((DrawableContainer.DrawableContainerState) drawable.getConstantState());
        //can't getBaseApplication containState from drawable which is containing DrawableWrapperDonut
        //https://code.google.com/p/android/issues/detail?id=169920
        if (containerState == null) {
            return true;
        }
        for (Drawable dr : containerState.getChildren()) {
            dr = getWrapperDrawable(dr);
            if (dr instanceof NinePatchDrawable
                    || dr instanceof InsetDrawable
                    || dr instanceof LayerDrawable) {
                return true;
            }
        }
    }
    return false;
}

public Drawable getCheckStatusDrawable(String origin, String checked, String pressed, String checkpressed, boolean is9Png) {
    int originId = this.mResources.getIdentifier(origin, "drawable", this.packageName);
    int selectId = this.mResources.getIdentifier(checked, "drawable", this.packageName);
    int pressedId = this.mResources.getIdentifier(pressed, "drawable", this.packageName);
    int selectpressId = this.mResources.getIdentifier(checkpressed, "drawable", this.packageName);
    if (originId == 0 && selectId == 0 && pressedId == 0 && selectpressId == 0) {
        String suffix = (is9Png ? ".9" : "") + ".png";
        return new StateListDrawableBuilder(this.mContext, "drawable/" + origin + suffix).setPressDrawable("drawable/" + pressed + suffix).setCheckedDrawable("drawable/" + checked + suffix).setPressCheckedDrawable("drawable/" + checkpressed + suffix).create();
    }
    Drawable mStateListDrawable = new StateListDrawable();
    mStateListDrawable.addState(new int[]{16842912}, this.mResources.getDrawable(selectId));
    mStateListDrawable.addState(new int[]{16842919}, this.mResources.getDrawable(pressedId));
    mStateListDrawable.addState(new int[]{16842919, 16842912}, this.mResources.getDrawable(selectpressId));
    mStateListDrawable.addState(new int[0], this.mResources.getDrawable(originId));
    return mStateListDrawable;
}

public void addItem(@DrawableRes int ico) {
    EmojiTabItemView itemView = new EmojiTabItemView(getContext());
    itemView.setImageResource(ico);
    if (mItemBackgroundRes == 0) {
        StateListDrawable stateListDrawable = new StateListDrawable();
        stateListDrawable.addState(new int[]{android.R.attr.state_checked},
                new ColorDrawable(getResources().getColor(R.color.default_base_bg_press)));
        stateListDrawable.addState(new int[]{android.R.attr.state_pressed},
                new ColorDrawable(getResources().getColor(R.color.default_base_bg_press)));
        stateListDrawable.addState(new int[]{}, new ColorDrawable(Color.TRANSPARENT));
        itemView.setBackground(stateListDrawable);
    } else {
        itemView.setBackgroundResource(mItemBackgroundRes);
    }
    addView(itemView, -1, -1);
    itemView.setOnClickListener(this);
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private Drawable createFillDrawable() {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{android.R.attr.state_pressed}, createRectDrawable(mColorPressed));
    drawable.addState(new int[]{}, createRectDrawable(mColorNormal));

    if (Util.hasLollipop()) {
        RippleDrawable ripple = new RippleDrawable(new ColorStateList(new int[][]{{}},
                new int[]{mColorRipple}), drawable, null);
        setOutlineProvider(new ViewOutlineProvider() {
            @Override
            public void getOutline(View view, Outline outline) {
                outline.setOval(0, 0, view.getWidth(), view.getHeight());
            }
        });
        setClipToOutline(true);
        mBackgroundDrawable = ripple;
        return ripple;
    }

    mBackgroundDrawable = drawable;
    return drawable;
}

/**
 * Generate bg drawable drawable.
 *
 * @param pressColor   the press color
 * @param defaultColor the default color
 * @return the drawable
 */
public static Drawable generateRoundDrawable(float radii, int pressColor, int defaultColor) {
    //圆角
    Shape roundRectShape = new RoundRectShape(new float[]{radii, radii, radii, radii, radii, radii, radii, radii}, null, null);//圆角背景

    //按下状态
    ShapeDrawable shopDrawablePress = new ShapeDrawable(roundRectShape);//圆角shape
    shopDrawablePress.getPaint().setColor(pressColor);//设置颜色

    //正常状态
    ShapeDrawable shopDrawableNormal = new ShapeDrawable(roundRectShape);
    shopDrawableNormal.getPaint().setColor(defaultColor);

    StateListDrawable bgStateDrawable = new StateListDrawable();//状态shape
    bgStateDrawable.addState(new int[]{android.R.attr.state_pressed}, shopDrawablePress);//按下状态
    bgStateDrawable.addState(new int[]{-android.R.attr.state_enabled}, shopDrawablePress);
    bgStateDrawable.addState(new int[]{}, shopDrawableNormal);//其他状态

    return bgStateDrawable;
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    void onActionUp() {
        if (mUsingStyle) {
            mBackgroundDrawable = getBackground();
        }

        if (mBackgroundDrawable instanceof StateListDrawable) {
            StateListDrawable drawable = (StateListDrawable) mBackgroundDrawable;
            drawable.setState(new int[]{});
        } else if (Util.hasLollipop() && mBackgroundDrawable instanceof RippleDrawable) {
            RippleDrawable ripple = (RippleDrawable) mBackgroundDrawable;
            ripple.setState(new int[]{});
            ripple.setHotspot(getMeasuredWidth() / 2, getMeasuredHeight() / 2);
            ripple.setVisible(true, true);
        }
//        setPressed(false);
    }

private StateListDrawable createDefaultOverButtonBgDrawable() {
    int dp12 = (int) ThemeUtils.applyDimensionDp(this, 12.f);
    int dp8 = (int) ThemeUtils.applyDimensionDp(this, 8.f);
    float dp4 = ThemeUtils.applyDimensionDp(this, 4.f);
    float[] round = new float[]{dp4, dp4, dp4, dp4, dp4, dp4, dp4, dp4};
    ShapeDrawable pressedDrawable = new ShapeDrawable(new RoundRectShape(round, null, null));
    pressedDrawable.setPadding(dp12, dp8, dp12, dp8);
    int pressedColor = ThemeUtils.resolveColor(this, R.attr.gallery_toolbar_over_button_pressed_color, R.color.gallery_default_toolbar_over_button_pressed_color);
    pressedDrawable.getPaint().setColor(pressedColor);

    int normalColor = ThemeUtils.resolveColor(this, R.attr.gallery_toolbar_over_button_normal_color, R.color.gallery_default_toolbar_over_button_normal_color);
    ShapeDrawable normalDrawable = new ShapeDrawable(new RoundRectShape(round, null, null));
    normalDrawable.setPadding(dp12, dp8, dp12, dp8);
    normalDrawable.getPaint().setColor(normalColor);

    StateListDrawable stateListDrawable = new StateListDrawable();
    stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, pressedDrawable);
    stateListDrawable.addState(new int[]{}, normalDrawable);

    return stateListDrawable;
}

private StateListDrawable getDrawableSeletor(Drawable normal,
        Drawable press) {
    StateListDrawable bg = new StateListDrawable();
    if (null != normal) {
        bg.addState(new int[] { android.R.attr.state_pressed }, press);
    }
    if (null != press) {
        bg.addState(new int[] { android.R.attr.state_enabled }, normal);
    }
    return bg;
}

private void setScanBtnBg(){
    int defColor = CustomAttrValueUtil.getAttrColorValue(R.attr.colorAccent,R.color.colorAccent,this);
    int pressColor = CustomAttrValueUtil.getAttrColorValue(R.attr.press_color,R.color.colorAccent,this);
    Drawable backgroundDrawable =  scanBtn.getBackground();
    StateListDrawable sld = (StateListDrawable) backgroundDrawable;// 通过向下转型，转回原型，selector对应的Java类为：StateListDrawable
    SelectorUtil.changeViewColor(sld,new int[]{pressColor,defColor});
}

private static StateListDrawable getStateListDrawable(@ColorInt int normalColor,
                                                      @ColorInt int pressedColor) {
    StateListDrawable states = new StateListDrawable();
    states.addState(new int[]{android.R.attr.state_activated}, getColorDrawable(pressedColor));
    states.addState(new int[]{}, getColorDrawable(normalColor));
    // Animating across states.
    // It seems item background is lost on scrolling out of the screen, 21 <= API <= 23
    if (!Utils.hasLollipop() || Utils.hasNougat()) {
        int duration = 200; //android.R.integer.config_shortAnimTime
        states.setEnterFadeDuration(duration);
        states.setExitFadeDuration(duration);
    }
    return states;
}

private Drawable getPressedEffectBeforeLollipop(CORNER_POSITION cornerPosition, int color) {
    ShapeDrawable colorDrawablePressed = getCornerStateDrawable(cornerPosition);
    colorDrawablePressed.getPaint().setColor(color);
    colorDrawablePressed.getPaint().setStyle(Paint.Style.FILL);
    colorDrawablePressed.getPaint().setAlpha(PRESSED_ALPHA_VALUE);
    colorDrawablePressed.mutate();

    StateListDrawable textBgDrawable = new StateListDrawable();
    textBgDrawable.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed}, colorDrawablePressed);
    return textBgDrawable;
}

/**
 * helper to create an StateListDrawable for the given normal and pressed color
 *
 * @param normalColor  the normal color
 * @param pressedColor the pressed color
 * @return the StateListDrawable
 */
private static StateListDrawable getStateListDrawable(
        int normalColor, int pressedColor) {
    StateListDrawable states = new StateListDrawable();
    states.addState(new int[]{android.R.attr.state_pressed},
            new ColorDrawable(pressedColor));
    states.addState(new int[]{android.R.attr.state_focused},
            new ColorDrawable(pressedColor));
    states.addState(new int[]{android.R.attr.state_activated},
            new ColorDrawable(pressedColor));
    states.addState(new int[]{},
            new ColorDrawable(normalColor));
    return states;
}