com.bryan.lib.util.TabUtils.java Source code

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Here is the source code for com.bryan.lib.util.TabUtils.java

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/*
 *
 * COPYRIGHT NOTICE
 * Copyright (C) 2015, bryan <690158801@qq.com>
 * https://github.com/cxbiao/Android-common
 *
 * @license under the Apache License, Version 2.0
 *
 * @version 1.0
 * @author  bryan
 * @date    2015/08/26
 *
 */

package com.bryan.lib.util;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;

import java.util.List;

/**
 * 
 * @author bryan
 * :2015826
 * :TabUtils
 * :Tab
 */
public class TabUtils {

    private ViewGroup tabGroup;

    private FragmentManager fragmentManager;
    private List<Fragment> fragments;
    private int containerViewId;
    private int currentIndex;
    private OnTabItemListener listener;

    public interface OnTabItemListener {
        void onClick(View view, int index);
    }

    public TabUtils(FragmentManager fragmentManager, List<Fragment> fragments, int container) {
        this.fragmentManager = fragmentManager;
        this.fragments = fragments;
        this.containerViewId = container;
    }

    public void setTabGroup(ViewGroup tabGroup) {
        this.tabGroup = tabGroup;
    }

    public void setTabListener(OnTabItemListener listener) {
        this.listener = listener;
    }

    public void buildTab() {
        if (tabGroup == null || tabGroup.getChildCount() < 1) {
            return;
        }
        for (int i = 0; i < tabGroup.getChildCount(); i++) {
            final int index = i;
            tabGroup.getChildAt(i).setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    setTab(index);
                    if (currentIndex != index && listener != null) {
                        listener.onClick(v, index);
                    }
                }
            });
        }
        getRealChild(tabGroup.getChildAt(0)).setSelected(true);
        fragmentManager.beginTransaction().add(containerViewId, fragments.get(0)).commit();
    }

    public void setTab(int index) {
        if (currentIndex == index) {
            return;
        }
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        for (Fragment fragment : fragments) {
            if (fragment.isAdded()) {
                transaction.hide(fragment);
            }
        }
        if (!fragments.get(index).isAdded()) {
            transaction.add(containerViewId, fragments.get(index));
        }
        getRealChild(tabGroup.getChildAt(currentIndex)).setSelected(false);
        getRealChild(tabGroup.getChildAt(index)).setSelected(true);
        currentIndex = index;
        transaction.show(fragments.get(index)).commit();
    }

    private View getRealChild(View child) {
        View realChild = null;
        //viewgroup,????  android:clickable="false"
        if (child instanceof ViewGroup) {
            ViewGroup group = (ViewGroup) child;

            if (group.getChildCount() == 1) {
                realChild = ((ViewGroup) child).getChildAt(0);
            }
            //viewgroup1?tag
            else if (group.getChildCount() > 1) {
                for (int i = 0; i < group.getChildCount(); i++) {
                    if (group.getChildAt(i).getTag() != null) {
                        realChild = group.getChildAt(i);
                        break;
                    }
                }

            } else {
                realChild = child;
            }

        } else if (child instanceof View) {
            realChild = child;
        }
        return realChild;
    }

}