android滑动改变状态栏颜色及透明度
16lz
2021-12-04
RecyclerView根据滑动改变状态栏
//滑动监听事件 mRv.addOnScrollListener(new RecyclerView.OnScrollListener() { //dy:每一次竖直滑动增量 向下为正 向上为负 @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); final float density = mContext.getResources().getDisplayMetrics().density; //滑动的距离 mDistanceY += dy; //toolbar的高度 int toolbarHeight = (int) (214f * density) - mSearchLinear.getHeight(); //当滑动的距离 <= toolbar高度的时候，改变Toolbar背景色的透明度，达到渐变的效果 if (mDistanceY <= toolbarHeight) { mSearchKefu.setImageResource(R.mipmap.icon_kf_white); mSearchSaoyisao.setImageResource(R.mipmap.icon_sys_white);// searchLocationIma.setBackgroundResource(R.mipmap.icon_location_white); if (isIma) { searchLocationImaBlack.setVisibility(View.GONE); searchLocationIma.setVisibility(View.VISIBLE); } else { searchLocationText.setTextColor(Color.WHITE); searchLocationText.setCompoundDrawables(null, null, drawable2, null); } mSearchEdit.setTextColor(Color.WHITE);// mSearchLinearEdit.setBackgroundResource(R.drawable.bg_search); setStateBarTextColor(false); barState = "白"; float scale = (float) mDistanceY / toolbarHeight; float alpha = scale * 255; mSearchLinear.setBackgroundColor(Color.argb((int) alpha, 255, 255, 255)); } else if (mDistanceY >= toolbarHeight) { mSearchLinear.setBackgroundResource(R.color.white);// searchLocationIma.setBackgroundResource(R.mipmap.icon_location); if (isIma) { searchLocationImaBlack.setVisibility(View.VISIBLE); searchLocationIma.setVisibility(View.GONE); } else { searchLocationText.setTextColor(Color.BLACK); searchLocationText.setCompoundDrawables(null, null, drawable1, null); } mSearchKefu.setImageResource(R.mipmap.icon_kf_black); mSearchSaoyisao.setImageResource(R.mipmap.icon_sys_black); mSearchEdit.setTextColor(Color.parseColor("#3B4664"));// mSearchLinearEdit.setBackgroundResource(R.drawable.bg_search_hide); setStateBarTextColor(true); barState = "黑"; } else { //上述虽然判断了滑动距离与toolbar高度相等的情况，但是实际测试时发现，标题栏的背景色 //很少能达到完全不透明的情况，所以这里又判断了滑动距离大于toolbar高度的情况， //将标题栏的颜色设置为完全不透明状态// setStateBarTextColor(true);// barState = "黑";// mSearchLinear.setBackgroundResource(R.color.white);//'// searchLocationIma.setBackgroundResource(R.mipmap.icon_location);// mSearchKefu.setImageResource(R.mipmap.icon_kf_black);// mSearchSaoyisao.setImageResource(R.mipmap.icon_sys_black);// mSearchEdit.setTextColor(Color.GRAY);// searchLocationText.setTextColor(Color.GRAY); } } });根据ScrollView滑动改变
//设置滑动 scrollView.setOnScrollistener(new MyScrollView.OnScrollistener() { @Override public void onScroll(int startY, int endY) { changeAphla(startY, endY); } }); /** * 根据内容窗体的移动改变标题栏背景透明度 * * @param startY scrollview开始滑动的y坐标（相对值） * @param endY scrollview结束滑动的y坐标（相对值） */ private void changeAphla(int startY, int endY) { //获取标题高度 int titleHeight = titleFrame.getMeasuredHeight(); //获取背景高度 int backHeight = doctorHomeTxBg.getMeasuredHeight(); //获取控件的绝对位置坐标 int[] location = new int[2]; doctorHomeTxBg.getLocationInWindow(location); //从屏幕顶部到控件顶部的坐标位置Y int currentY = location[1]; //表示回到原位（滑动到顶部） if (currentY >= 0) { titleFrame.getBackground().mutate().setAlpha(0); } //颜色透明度改变 if (currentY < titleHeight && currentY >= -(backHeight - titleHeight)) { //计算出滚动过程中改变的透明值 double y = Math.abs(currentY) * 1.0; double height = (backHeight - titleHeight) * 1.0; int changeValue = (int) (y / height * 255); //判断是向上还是向下 if (endY > startY) { //向上;透明度值增加，实际透明度减小 titleFrame.getBackground().mutate().setAlpha(changeValue); } else if (endY < startY) { //向下；透明度值减小，实际透明度增加 titleFrame.getBackground().mutate().setAlpha(changeValue); } } //背景移除屏幕 if (currentY < -(backHeight - titleHeight)) { titleFrame.getBackground().mutate().setAlpha(255); titleLeftBack.setImageResource(R.mipmap.jt_left); titleRight.setImageResource(R.mipmap.icon_more); title.setTextColor(Color.BLACK); setStateBarTextColor(true); } else { titleLeftBack.setImageResource(R.mipmap.icon_back_left_white); titleRight.setImageResource(R.mipmap.icon_more_white); title.setTextColor(Color.WHITE); setStateBarTextColor(false); } }自定义ScrollView
public class MyScrollView extends NestedScrollView { private OnScrollistener onScrollistener; public OnScrollistener getOnScrollistener() { return onScrollistener; } public void setOnScrollistener(OnScrollistener onScrollistener) { this.onScrollistener = onScrollistener; } public MyScrollView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public MyScrollView(Context context, AttributeSet attrs) { super(context, attrs); } public MyScrollView(Context context) { super(context); } public interface OnScrollistener { void onScroll(int startY, int endY); } @Override protected void onScrollChanged(int l, int t, int oldl, int oldt) { onScrollistener.onScroll(oldt, t); super.onScrollChanged(l, t, oldl, oldt); }}改变状态栏字体颜色
/** * 修改状态栏字体颜色 * * @param dark */ private void setStateBarTextColor(boolean dark) { View decor = getWindow().getDecorView(); if (dark) { //黑 decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR); } else { //白 decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE); } }
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