[应用妹 --第三篇 主界面Tab搭建2] android应用市场之快速开发
浏览数：23 /
时间：2015年06月11日
应用市场之，顶部游戏分类tab游戏以及软件分类,是用viewpage实现的。
具体实现代码如下。
public class MyTabView extends LinearLayout {
/** The context. */
private Context context;
/** The m tab selector. */
private Runnable mTabSelector;
/** The m listener. */
private ViewPager.OnPageChangeListener mListener;
/** The m max tab width. */
public int mMaxTabWidth;
/** The m selected tab index. */
private int mSelectedTabIndex;
/** tab的背景. */
private int tabBackgroundResource = -1;
/** tab的文字大小. */
private int tabTextSize = 30;
/** 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 MyViewPage 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;
/** The m tab click listener. */
private OnClickListener mTabClickListener = new OnClickListener() {
public void onClick(View view) {
AbTabItemView tabView = (AbTabItemView)view;
mViewPager.setCurrentItem(tabView.getIndex());
}
};
/**
* Instantiates a new ab sliding tab view.
*
* @param context the context
*/
public AbSlidingTabView(Context context) {
this(context, null);
}
/**
* Instantiates a new ab sliding tab view.
*
* @param context the context
* @param attrs the attrs
*/
public <span style="font-family: Arial, Helvetica, sans-serif;">MyTabView </span><span style="font-family: Arial, Helvetica, sans-serif;">(Context context, AttributeSet attrs) {</span>
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 MyViewPage(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>();
}
public void initChilldManager(FragmentManager mFragmentManager){
//要求必须是FragmentActivity的实例，
if(mFragmentManager==null){ //如果上面一个是fragment请传递，childSupport过来
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));
}
/**
* The listener interface for receiving myOnPageChange events.
* The class that is interested in processing a myOnPageChange
* event implements this interface, and the object created
* with that class is registered with a component using the
* component's <code>addMyOnPageChangeListener<code> method. When
* the myOnPageChange event occurs, that object's appropriate
* method is invoked.
*
* @see MyOnPageChangeEvent
*/
public class MyOnPageChangeListener implements OnPageChangeListener{
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrollStateChanged(int)
*/
@Override
public void onPageScrollStateChanged(int arg0) {
if (mListener != null) {
mListener.onPageScrollStateChanged(arg0);
}
}
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrolled(int, float, int)
*/
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
if (mListener != null) {
mListener.onPageScrolled(arg0, arg1, arg2);
}
}
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
*/
@Override
public void onPageSelected(int arg0) {
setCurrentItem(arg0);
if (mListener != null) {
mListener.onPageSelected(arg0);
}
}
}
/* (non-Javadoc)
* @see android.widget.LinearLayout#onMeasure(int, int)
*/
@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);
}
}
/**
* 滚动动画
*
* @param position the position
*/
private void animateToTab(final int position) {
final View tabView = mTabLayout.getChildAt(position);
if (mTabSelector != null) {//前面选择的tab不为null才把它移除掉
removeCallbacks(mTabSelector);
}
mTabSelector = new Runnable() { //tab滚动效果
public void run() {
final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2;
mTabScrollView.smoothScrollTo(scrollPos, 0);
mTabSelector = null;
}
};
post(mTabSelector);
}
/* (non-Javadoc)
* @see android.view.View#onAttachedToWindow()
*/
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
if (mTabSelector != null) {
// Re-post the selector we saved
post(mTabSelector);
}
}
/* (non-Javadoc)
* @see android.view.View#onDetachedFromWindow()
*/
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mTabSelector != null) {
removeCallbacks(mTabSelector);
}
}
/**
* 描述：创造一个Tab.
*
* @param text the text
* @param index the index
*/
private void addTab(String text, int index) {
addTab(text,index,null);
}
/**
* 描述：创造一个Tab.
*
* @param text the text
* @param index the index
* @param top the top
*/
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.MATCH_PARENT,1));
}
/**
* 描述：tab有变化刷新.
*/
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 the new current item
*/
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 the new on page change listener
*/
public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
mListener = listener;
}
/**
* 描述：设置tab文字的颜色.
*
* @param tabColor the new tab text color
*/
public void setTabTextColor(int tabColor) {
this.tabTextColor = tabColor;
}
/**
* 描述：设置选中的颜色.
*
* @param tabColor the new tab select color
*/
public void setTabSelectColor(int tabColor) {
this.tabSelectColor = tabColor;
}
/**
* 描述：设置文字大小.
*
* @param tabTextSize the new tab text size
*/
public void setTabTextSize(int tabTextSize) {
this.tabTextSize = tabTextSize;
}
/**
* 描述：设置单个tab的背景选择器.
*
* @param resid the new tab background resource
*/
public void setTabBackgroundResource(int resid) {
tabBackgroundResource = resid;
}
/**
* 描述：设置Tab的背景.
*
* @param resid the new tab layout background resource
*/
public void setTabLayoutBackgroundResource(int resid) {
this.mTabLayout.setBackgroundResource(resid);
}
/**
* 描述：增加一组内容与tab.
*
* @param tabTexts the tab texts
* @param fragments the fragments
*/
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.
*
* @param tabTexts the tab texts
* @param fragments the fragments
* @param drawables the drawables
*/
public void addItemViews(List<String> tabTexts,List<Fragment> fragments,List<Drawable> drawables){
tabItemTextList.addAll(tabTexts);
pagerItemList.addAll(fragments);
tabItemDrawableList.addAll(drawables);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
* 描述：增加一个内容与tab.
*
* @param tabText the tab text
* @param fragment the fragment
*/
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.
*
* @param tabText the tab text
* @param fragment the fragment
* @param drawable the drawable
*/
public void addItemView(String tabText,Fragment fragment,Drawable drawable){
tabItemTextList.add(tabText);
pagerItemList.add(fragment);
tabItemDrawableList.add(drawable);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
* 描述：删除某一个.
*
* @param index the index
*/
public void removeItemView(int index){
mTabLayout.removeViewAt(index);
pagerItemList.remove(index);
tabItemList.remove(index);
tabItemDrawableList.remove(index);
tabItemTextList.remove(index);
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
* 描述：删除所有.
*/
public void removeAllItemViews(){
mTabLayout.removeAllViews();
pagerItemList.clear();
tabItemList.clear();
tabItemDrawableList.clear();
tabItemTextList.clear();
mFragmentPagerAdapter.notifyDataSetChanged();
notifyTabDataSetChanged();
}
/**
* 描述：获取这个View的ViewPager.
*
* @return the view pager
*/
public ViewPager getViewPager() {
return mViewPager;
}
/**
* 描述：设置每个tab的边距.
*
* @param left the left
* @param top the top
* @param right the right
* @param bottom the bottom
*/
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);
}
}
}
自定义VIewpage
解决 viewpage 嵌套viewpage
package com.ferris.view;
import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.View;
public class MyViewPage extends ViewPager {
public MyViewPage(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public MyViewPage(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
if(v != this && v instanceof AbSlidingPlayView) {//解决 viewpage 嵌套viewpage
return true;
}
return super.canScroll(v, checkV, dx, x, y);
}
// //If the child viewpager is at the end, scroll the parent
//
// protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
// if(v != this && v instanceof ViewPager) {
// int currentItem = ((ViewPager) v).getCurrentItem();
// int countItem = ((ViewPager) v).getAdapter().getCount();
// if((currentItem==(countItem-1) && dx<0) || (currentItem==0 && dx>0)){
// return false;
// }
// return true;
// }
// return super.canScroll(v, checkV, dx, x, y);
// }
}
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