package com.ab.view.sliding;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.ab.adapter.AbFragmentPagerAdapter;
import com.ab.global.AbAppData;
/**
* This widget implements the dynamic action bar tab behavior that can change
* across different configurations or circumstances.
*/
public class AbSlidingTabView extends LinearLayout {
/** The tag. */
private static String TAG = "AbSlidingTabView";
/** The Constant D. */
private static final boolean D = AbAppData.DEBUG;
private Context context;
private Runnable mTabSelector;
private ViewPager.OnPageChangeListener mListener;
public int mMaxTabWidth;
private int mSelectedTabIndex;
/**tab的背景*/
private int tabBackgroundResource = -1;
/**tab的文字大小*/
private int tabTextSize = 16;
/**tab的文字颜色*/
private int tabTextColor = Color.BLACK;
/**tab的选中文字颜色*/
private int tabSelectColor = Color.BLACK;
/** tab的线性布局. */
private LinearLayout mTabLayout = null;
/** tab的线性布局父. */
private HorizontalScrollView mTabScrollView = null;
/** The m view pager. */
private ViewPager mViewPager;
/**tab的文字*/
private List<String> tabItemTextList = null;
/**tab的图标*/
private List<Drawable> tabItemDrawableList = null;
/**内容的View*/
private ArrayList<Fragment> pagerItemList = null;
/**tab的列表*/
private ArrayList<TextView> tabItemList = null;
/**内容区域的适配器*/
private AbFragmentPagerAdapter mFragmentPagerAdapter = null;
private OnClickListener mTabClickListener = new OnClickListener() {
public void onClick(View view) {
AbTabItemView tabView = (AbTabItemView)view;
mViewPager.setCurrentItem(tabView.getIndex());
}
};
public AbSlidingTabView(Context context) {
this(context, null);
}
public AbSlidingTabView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
this.setOrientation(LinearLayout.VERTICAL);
this.setBackgroundColor(Color.rgb(255, 255, 255));
mTabScrollView = new HorizontalScrollView(context);
mTabScrollView.setHorizontalScrollBarEnabled(false);
mTabScrollView.setSmoothScrollingEnabled(true);
mTabLayout = new LinearLayout(context);
mTabLayout.setOrientation(LinearLayout.HORIZONTAL);
mTabLayout.setGravity(Gravity.CENTER);
//mTabLayout是内容宽度
mTabScrollView.addView(mTabLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.FILL_PARENT));
this.addView(mTabScrollView,new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
//内容的View的适配
mViewPager = new ViewPager(context);
//手动创建的ViewPager,必须调用setId()方法设置一个id
mViewPager.setId(1985);
pagerItemList = new ArrayList<Fragment>();
//定义Tab栏
tabItemList = new ArrayList<TextView>();
tabItemTextList = new ArrayList<String>();
tabItemDrawableList = new ArrayList<Drawable>();
//要求必须是FragmentActivity的实例
if(!(this.context instanceof FragmentActivity)){
Log.e(TAG, "构造AbSlidingTabView的参数context,必须是FragmentActivity的实例。");
}
FragmentManager mFragmentManager = ((FragmentActivity)this.context).getSupportFragmentManager();
mFragmentPagerAdapter = new AbFragmentPagerAdapter(
mFragmentManager, pagerItemList);
mViewPager.setAdapter(mFragmentPagerAdapter);
mViewPager.setOnPageChangeListener(new MyOnPageChangeListener());
mViewPager.setOffscreenPageLimit(3);
this.addView(mViewPager,new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
}
public class MyOnPageChangeListener implements OnPageChangeListener{
@Override
public void onPageScrollStateChanged(int arg0) {
if (mListener != null) {
mListener.onPageScrollStateChanged(arg0);
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
if (mListener != null) {
mListener.onPageScrolled(arg0, arg1, arg2);
}
}
@Override
public void onPageSelected(int arg0) {
setCurrentItem(arg0);
if (mListener != null) {
mListener.onPageSelected(arg0);
}
}
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
final boolean lockedExpanded = widthMode == MeasureSpec.EXACTLY;
mTabScrollView.setFillViewport(lockedExpanded);
final int childCount = mTabLayout.getChildCount();
if (childCount > 1 && (widthMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.AT_MOST)) {
if (childCount > 2) {
mMaxTabWidth = (int)(MeasureSpec.getSize(widthMeasureSpec) * 0.4f);
} else {
mMaxTabWidth = MeasureSpec.getSize(widthMeasureSpec) / 2;
}
} else {
mMaxTabWidth = -1;
}
final int oldWidth = getMeasuredWidth();
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int newWidth = getMeasuredWidth();
if (lockedExpanded && oldWidth != newWidth) {
// Recenter the tab display if we're at a new (scrollable) size.
setCurrentItem(mSelectedTabIndex);
}
}
private void animateToTab(final int position) {
final View tabView = mTabLayout.getChildAt(position);
if (mTabSelector != null) {
removeCallbacks(mTabSelector);
}
mTabSelector = new Runnable() {
public void run() {
final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2;
mTabScrollView.smoothScrollTo(scrollPos, 0);
mTabSelector = null;
}
};
post(mTabSelector);
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
if (mTabSelector != null) {
// Re-post the selector we saved
post(mTabSelector);
}
}
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mTabSelector != null) {
removeCallbacks(mTabSelector);
}
}
/**
*
* 描述：创造一个Tab
* @param text
* @param index
* @throws
*/
private void addTab(String text, int index) {
addTab(text,index,null);
}
/**
*
* 描述：创造一个Tab
* @param text
* @param index
* @throws
*/
private void addTab(String text, int index,Drawable top) {
AbTabItemView tabView = new AbTabItemView(this.context);
if(tabBackgroundResource!=-1){
tabView.setTabBackgroundResource(tabBackgroundResource);
}
if(top!=null){
tabView.setTabCompoundDrawables(null, top, null, null);
}
tabView.setTabTextColor(tabTextColor);
tabView.setTabTextSize(tabTextSize);
tabView.init(index,text);
tabItemList.add(tabView.getTextView());
tabView.setOnClickListener(mTabClickListener);
mTabLayout.addView(tabView, new LayoutParams(0,LayoutParams.FILL_PARENT,1));
}
/**
*
* 描述：tab有变化刷新
* @throws
*/
public void notifyTabDataSetChanged() {
mTabLayout.removeAllViews();
tabItemList.clear();
final int count = mFragmentPagerAdapter.getCount();
for (int i = 0; i < count; i++) {
if(tabItemDrawableList.size()>0){
addTab(tabItemTextList.get(i), i,tabItemDrawableList.get(i));
}else{
addTab(tabItemTextList.get(i), i);
}
}
if (mSelectedTabIndex > count) {
mSelectedTabIndex = count - 1;
}
setCurrentItem(mSelectedTabIndex);
requestLayout();
}
/**
*
* 描述：设置显示哪一个
* @param item
* @throws
*/
public void setCurrentItem(int item) {
if (mViewPager == null) {
throw new IllegalStateException("ViewPager has not been bound.");
}
mSelectedTabIndex = item;
final int tabCount = mTabLayout.getChildCount();
for (int i = 0; i < tabCount; i++) {
final AbTabItemView child = (AbTabItemView)mTabLayout.getChildAt(i);
final boolean isSelected = (i == item);
child.setSelected(isSelected);
if (isSelected) {
child.setTabTextColor(tabSelectColor);
animateToTab(item);
}else{
child.setTabTextColor(tabTextColor);
}
}
}
/**
*
* 描述：设置一个外部的监听器
* @param listener
* @throws
*/
public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
mListener = listener;
}
/**
*
* 描述：设置tab文字的颜色
* @param tabColor
* @throws
*/
public void setTabTextColor(int tabColor) {
this.tabTextColor = tabColor;
}
/**
*
* 描述：设置选中的颜色
* @param tabColor
* @throws
*/
public void setTabSelectColor(int tabColor) {
this.tabSelectColor = tabColor;
}
/**
*
* 描述：设置文字大小
* @param tabTextSize
* @throws
*/
public void setTabTextSize(int tabTextSize) {
this.tabTextSize = tabTextSize;
}
/**
* 描述：设置tab的背景选择
* @param resid
* @throws
*/
public void setTabBackgroundResource(int resid) {
tabBackgroundResource = resid;
}
/**
*
* 描述：设置Tab的背景
* @param res
* @throws
*/
public void setTabLayoutBackgroundResource(int res) {
this.mTabLayout.setBackgroundResource(res);
}
/**
*
* 描述：增加一组内容与tab
* @throws
*/
public void addItemViews(List<String> tabTexts,List<Fragment> fragments){
tabItemTextList.addAll(tabTexts);
pagerItemList.addAll(fragments);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：增加一组内容与tab
* @throws
*/
public void addItemViews(List<String> tabTexts,List<Drawable> drawables,List<Fragment> fragments){
tabItemTextList.addAll(tabTexts);
pagerItemList.addAll(fragments);
tabItemDrawableList.addAll(drawables);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：增加一个内容与tab
* @throws
*/
public void addItemView(String tabText,Fragment fragment){
tabItemTextList.add(tabText);
pagerItemList.add(fragment);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：增加一个内容与tab
* @throws
*/
public void addItemView(String tabText,Drawable drawable,Fragment fragment){
tabItemTextList.add(tabText);
pagerItemList.add(fragment);
tabItemDrawableList.add(drawable);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：删除某一个
* @param index
* @throws
*/
public void removeItemView(int index){
mTabLayout.removeViewAt(index);
pagerItemList.remove(index);
tabItemList.remove(index);
tabItemDrawableList.remove(index);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：删除所有
* @throws
*/
public void removeAllItemViews(){
mTabLayout.removeAllViews();
pagerItemList.clear();
tabItemList.clear();
tabItemDrawableList.clear();
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
*
* 描述：获取这个View的ViewPager
* @return
* @throws
*/
public ViewPager getViewPager() {
return mViewPager;
}
/**
*
* 描述：设置每个tab的边距
* @param left
* @param top
* @param right
* @param bottom
* @throws
*/
public void setTabPadding(int left, int top, int right, int bottom) {
for(int i = 0;i<tabItemList.size();i++){
TextView tv = tabItemList.get(i);
tv.setPadding(left, top, right, bottom);
}
}
}