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                        /ViewPager+Tab特效實(shí)現(xiàn)微信主界面

字體顏色變不了

切換字體顏色的代碼
private?int?evaluate(float?progress,?int?startValue,?int?endValue)?{
????int?startA?=?(startValue?>>?24)?&?0xff;
????int?startR?=?(startValue?>>?16)?&?0xff;
????int?startG?=?(startValue?>>?8)?&?0xff;
????int?startB?=?startValue?&?0xff;

????int?endA?=?(endValue?>>?24)?&?0xff;
????int?endR?=?(endValue?>>?16)?&?0xff;
????int?endG?=?(endValue?>>?8)?&?0xff;
????int?endB?=?endValue?&?0xff;

????return?(int)((startA?+?(int)?progress?*?(endA?-?startA)))?<<?24?|
????????????(int)((startR?+?(int)?progress?*?(endR?-?startR)))?<<?16?|
????????????(int)((startG?+?(int)?progress?*?(endG?-?startG)))?<<?8?|
????????????(int)?((startB?+?(int)?progress?*?(endB?-?startB)));
}

if?(positionOffset?>?0)?{
????TabView?left?=?mTabs.get(position);
????TabView?right?=?mTabs.get(position?+?1);
????left.setProgress((1?-?positionOffset));
????right.setProgress(positionOffset);
}

慕移動(dòng)9209807

2019-04-23

源自：ViewPager+Tab特效實(shí)現(xiàn)微信主界面 4-3

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2 回答

慕虎6181031
2019-11-12

private?int?evaluate(float?fraction,?int?startValue,?int?endValue)?{
????int?startInt?=?(Integer)?startValue;
????float?startA?=?((startInt?>>?24)?&?0xff)?/?255.0f;
????float?startR?=?((startInt?>>?16)?&?0xff)?/?255.0f;
????float?startG?=?((startInt?>>??8)?&?0xff)?/?255.0f;
????float?startB?=?(?startInt????????&?0xff)?/?255.0f;

????int?endInt?=?(Integer)?endValue;
????float?endA?=?((endInt?>>?24)?&?0xff)?/?255.0f;
????float?endR?=?((endInt?>>?16)?&?0xff)?/?255.0f;
????float?endG?=?((endInt?>>??8)?&?0xff)?/?255.0f;
????float?endB?=?(?endInt????????&?0xff)?/?255.0f;

????//?convert?from?sRGB?to?linear
????startR?=?(float)?Math.pow(startR,?2.2);
????startG?=?(float)?Math.pow(startG,?2.2);
????startB?=?(float)?Math.pow(startB,?2.2);

????endR?=?(float)?Math.pow(endR,?2.2);
????endG?=?(float)?Math.pow(endG,?2.2);
????endB?=?(float)?Math.pow(endB,?2.2);

????//?compute?the?interpolated?color?in?linear?space
????float?a?=?startA?+?fraction?*?(endA?-?startA);
????float?r?=?startR?+?fraction?*?(endR?-?startR);
????float?g?=?startG?+?fraction?*?(endG?-?startG);
????float?b?=?startB?+?fraction?*?(endB?-?startB);

????//?convert?back?to?sRGB?in?the?[0..255]?range
????a?=?a?*?255.0f;
????r?=?(float)?Math.pow(r,?1.0?/?2.2)?*?255.0f;
????g?=?(float)?Math.pow(g,?1.0?/?2.2)?*?255.0f;
????b?=?(float)?Math.pow(b,?1.0?/?2.2)?*?255.0f;

????return?Math.round(a)?<<?24?|?Math.round(r)?<<?16?|?Math.round(g)?<<?8?|?Math.round(b);
}