package com.ywl5320.navigationbar.bar;
import android.app.Activity;
import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
/**
* Created by ywl on 2016/7/17.
*/
public class NavitationScrollLayout extends RelativeLayout{
private TextView[] textViews; // 标题栏数组，用于存储要显示的标题
private LinearLayout titleLayout; //标题栏父控件
private HorizontalScrollView horizontalScrollView; //横向scrollview
private ViewPager viewPager;
private View bgLine; //导航背景色
private View navLine; //导航条颜色
private int navWidth = 0; //导航条宽度
private int txtUnselectedColor = 0;
private int txtSelectedColor = 0;
private int txtUnselectedSize = 16;
private int txtSelectedSize = 16;
private int widOffset = 0; //导航条左右边距
private int leftm = 0; //标题布局左边距
private int cuPosition = 0; //当前位置
private float twidth = 0; //标题宽度
private int length = 0; //总的标题个数
private static int margleft = 0;
private OnTitleClickListener onTitleClickListener;
private OnNaPageChangeListener onNaPageChangeListener;
public NavitationScrollLayout(Context context) {
this(context, null);
}
public NavitationScrollLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public NavitationScrollLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
margleft = dip2px(context, 0);
titleLayout = new LinearLayout(context);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
titleLayout.setLayoutParams(layoutParams);
titleLayout.setOrientation(LinearLayout.HORIZONTAL);
titleLayout.setGravity(Gravity.CENTER_VERTICAL);
LayoutParams layoutParams2 = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
horizontalScrollView = new HorizontalScrollView(context);
horizontalScrollView.addView(titleLayout, layoutParams2);
horizontalScrollView.setHorizontalScrollBarEnabled(false);
addView(horizontalScrollView);
}
public void setOnTitleClickListener(OnTitleClickListener onTitleClickListener) {
this.onTitleClickListener = onTitleClickListener;
}
public void setOnNaPageChangeListener(OnNaPageChangeListener onNaPageChangeListener) {
this.onNaPageChangeListener = onNaPageChangeListener;
}
private void setTitles(Context context, String[] titles, final boolean smoothScroll, int splilinecolor, final float splilinewidth, float topoffset, float bottomoffset)
{
this.textViews = new TextView[titles.length];
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(dip2px(context, twidth),LayoutParams.MATCH_PARENT);
params.gravity = Gravity.CENTER;
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(dip2px(context, splilinewidth),LayoutParams.MATCH_PARENT);
lp.setMargins(0, dip2px(context, topoffset), 0, dip2px(context, bottomoffset));
// 循环，根据标题栏动态生成TextView来显示标题，每个标题栏的宽度比例为1:1,其中的内容居中。
for(int i = 0; i < titles.length; i++)
{
final int index = i;
TextView textView = new TextView(context);
textView.setText(titles[i]);
textView.setGravity(Gravity.CENTER);
textViews[i] = textView;
textViews[i].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(cuPosition == index)
{
horizontalScrollView.smoothScrollTo(index * dip2px(getContext(), twidth) - leftm, 0);
}
if(margleft == 0)
{
viewPager.setCurrentItem(index, smoothScroll);
}
else {
viewPager.setCurrentItem(index, false);
}
if(onTitleClickListener != null)
{
onTitleClickListener.onTitleClick(v);
}
}
});
titleLayout.addView(textView, params);
if(i < titles.length - 1)
{
View view = new View(context);
view.setBackgroundColor(splilinecolor);
titleLayout.addView(view, lp);
}
}
}
/**
* 设置导航背景色
* @param context
* @param height
* @param color
*/
public void setBgLine(Context context, int height, int color)
{
height = dip2px(context,height);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, height);
bgLine = new View(context);
bgLine.setLayoutParams(layoutParams);
bgLine.setBackgroundColor(context.getResources().getColor(color));
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, height);
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
addView(bgLine, lp);
}
/**
* 设置导航条颜色
* @param context
* @param height
* @param color
*/
public void setNavLine(Activity context, int height, int color)
{
if(textViews != null)
{
navWidth = dip2px(context, twidth);
}
height = dip2px(context,height);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, height);
navLine = new View(context);
navLine.setLayoutParams(layoutParams);
navLine.setBackgroundColor(context.getResources().getColor(color));
LayoutParams lp = new LayoutParams(navWidth, height);
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
addView(navLine, lp);
moveBar(navLine, navWidth, widOffset, 0, horizontalScrollView);
}
/**
*
* @param context 上下文
* @param titles 标题
* @param viewPager
* @param unselectedcolor 未选中字体颜色
* @param setectedcolor 选中字体颜色
* @param txtUnselectedSize 未选中字体大小
* @param txtSelectedSize 选中字体大小
* @param widOffset 导航条的边距
* @param smoothScroll 是否滑动效果
* @param splilinecolor 分割线颜色
* @param splilinewidth 分割线宽度
* @param topoffset 分割线上边距
* @param bottomoffset 分割线下边距
* @param titlewidth 标题子选项宽度
*/
public void setViewPager(final Context context, String[] titles, ViewPager viewPager, final int unselectedcolor, final int setectedcolor, int txtUnselectedSize, final int txtSelectedSize, int widOffset, boolean smoothScroll, int splilinecolor, final float splilinewidth, float topoffset, float bottomoffset, final int titlewidth)
{
this.viewPager = viewPager;
this.txtUnselectedColor = unselectedcolor;
this.txtSelectedColor = setectedcolor;
this.txtUnselectedSize = txtUnselectedSize;
this.txtSelectedSize = txtSelectedSize;
this.widOffset = dip2px(context, widOffset);
this.twidth = splilinewidth + titlewidth;
this.length = titles.length;
viewPager.setCurrentItem(0);
setTitles(context, titles, smoothScroll, splilinecolor, splilinewidth, topoffset, bottomoffset);
setUnselectedTxtColor(context, unselectedcolor, txtUnselectedSize);
setSelectedTxtColor(context, setectedcolor, txtSelectedSize, 0);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (position == 0) {
leftm = (int) (margleft * positionOffset);
} else {
leftm = margleft;
}
moveBar(navLine, navWidth, positionOffset, position, horizontalScrollView);
if (onNaPageChangeListener != null) {
onNaPageChangeListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}
}
@Override
public void onPageSelected(int position) {
cuPosition = position;
setSelectedTxtColor(context, setectedcolor, txtSelectedSize, position);
if(position == 0)
{
leftm = 0;
}
else
{
leftm = margleft;
}
horizontalScrollView.smoothScrollTo(position * dip2px(context, twidth) - leftm, 0);
if(onNaPageChangeListener != null)
{
onNaPageChangeListener.onPageSelected(position);
}
}
@Override
public void onPageScrollStateChanged(int state) {
if(onNaPageChangeListener != null)
{
onNaPageChangeListener.onPageScrollStateChanged(state);
}
}
});
}
private void moveBar(View bar, int width, float percent, int position, HorizontalScrollView horizontalScrollView) {
int w = (int) (position * dip2px(getContext(), twidth) + (dip2px(getContext(), twidth) * percent));
if (w + horizontalScrollView.getWidth() >= titleLayout.getWidth() + leftm) {
RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) bar.getLayoutParams();
int marginleft = horizontalScrollView.getWidth() - (length - position) * width + (int) (width * percent);
lp.width = width - widOffset * 2;
lp.setMargins(marginleft + widOffset, 0, widOffset, 0);
bar.requestLayout();
} else {
RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) bar.getLayoutParams();
lp.width = width - widOffset * 2;
lp.setMargins(widOffset + leftm, 0, widOffset, 0);
bar.requestLayout();
}
}
private void setUnselectedTxtColor(Context context, int unselectedcolor, int unselectedsize)
{
if(textViews != null)
{
int length = textViews.length;
for(int i = 0; i < length; i++)
{
textViews[i].setTextColor(context.getResources().getColor(unselectedcolor));
textViews[i].setTextSize(unselectedsize);
}
}
}
private void setSelectedTxtColor(Context context, int selectedcolor, int selectedsize, int position)
{
if(textViews != null)
{
int length = textViews.length;
for(int i = 0; i < length; i++)
{
if(i == position) {
textViews[i].setTextColor(context.getResources().getColor(selectedcolor));
textViews[i].setTextSize(selectedsize);
}
else
{
textViews[i].setTextColor(context.getResources().getColor(txtUnselectedColor));
textViews[i].setTextSize(txtUnselectedSize);
}
}
}
}
/**
* 获取屏幕宽度
*
* @param
* @return
*/
private static int getScreenWidth(Activity activity) {
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
return dm.widthPixels;
}
public static int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
/**
* 点击标题栏事件
*/
public interface OnTitleClickListener
{
void onTitleClick(View v);
}
/**
* viewpager滑动事件
*/
public interface OnNaPageChangeListener
{
void onPageScrolled(int position, float positionOffset, int positionOffsetPixels);
void onPageSelected(int position);
void onPageScrollStateChanged(int state);
}
}
