package com.example.ztz.bottomnavigationbar;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.widget.FrameLayout;

import com.ashokvarma.bottomnavigation.BadgeItem
 
;
import com.ashokvarma.bottomnavigation.BottomNavigationBar;
import com.ashokvarma.bottomnavigation.BottomNavigationItem;
import com.example.ztz.bottomnavigationbar.fragment.ClassificationFragment;
import com.example.ztz.bottomnavigationbar.fragment.FindFragment;
import com.example.ztz.bottomnavigationbar.fragment.HomeFragment
 
;
import com.example.ztz.bottomnavigationbar.fragment.MineFragment;
import com.example.ztz.bottomnavigationbar.fragment.ShopCartFragment;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * BottomNavigationBar最新版本(2.0.4)沒有BadgeItem方法,不知道為什麼
 *
 * BottomNavigationBar實現底部導航
 */
public class 
 
MainActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener {
@BindView(R.id.frameLayout)
FrameLayout frameLayout;
    @BindView(R.id.bottom_navigation_bar)
BottomNavigationBar bottomNavigationBar;
    private FragmentTransaction transaction;
    private ClassificationFragment classificationFragment;
    private HomeFragment homeFragment;
    private FindFragment findFragment;
    private ShopCartFragment shopCartFragment;
    private MineFragment mineFragment;
    private Fragment mFragment;//當前顯示的Fragment
    @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        //底部導航欄
BottomNavigationBar();
        //bottomNavigationBar的選中事件
bottomNavigationBar.setTabSelectedListener(this);
        //fragment聯動
initFragment();
    }
private void initFragment() {
homeFragment = new HomeFragment();
        classificationFragment = new ClassificationFragment();
        findFragment = new FindFragment();
        shopCartFragment = new ShopCartFragment();
        mineFragment = new MineFragment();

        transaction = getSupportFragmentManager().beginTransaction();
        transaction.add(R.id.frameLayout, homeFragment)
.commit();
        mFragment = homeFragment;
    }
private void BottomNavigationBar() {
//按鈕右上角紅點
BadgeItem badgeItem = new BadgeItem();
        badgeItem.setHideOnSelect(false)
.setText("10")
.setBackgroundColorResource(R.color.red)
.setBorderWidth(0);

        bottomNavigationBar.setActiveColor(R.color.colorAccent)//設定Item選中顏色方法
.setInActiveColor(R.color.colorPrimary)//設定Item未選中顏色方法
.setBarBackgroundColor("#FFFFFF");//背景顏色
bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED);//按鈕的樣式
        //背景樣式
bottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC);
        bottomNavigationBar.addItem(new BottomNavigationItem(R.drawable.shouye,"首頁").setBadgeItem(badgeItem))
.addItem(new BottomNavigationItem(R.drawable.fenlei,"分類"))
.addItem(new BottomNavigationItem(R.drawable.faxian,"發現"))
.addItem(new BottomNavigationItem(R.drawable.gouwuche,"購物車"))
.addItem(new BottomNavigationItem(R.drawable.mine,"我的"))
.setFirstSelectedPosition(0)//預設選中頁面
.initialise();
    }
@Override
public void onTabSelected(int position) {
switch (position){
case 0:
                switchFragment(homeFragment);
                break;
            case 1:
                switchFragment(classificationFragment);
                break;
            case 2:
                switchFragment(findFragment);
                break;
            case 3:
                switchFragment(shopCartFragment);
                break;
            case 4:
                switchFragment(mineFragment);
                break;
        }
    }
@Override
public void onTabUnselected(int position) {}
@Override
public void onTabReselected(int position) {}
private void switchFragment(Fragment fragment) {
//判斷當前顯示的Fragment是不是切換的Fragment
if(mFragment != fragment) {
//判斷切換的Fragment是否已經新增過
if (!fragment.isAdded()) {
//如果沒有，則先把當前的Fragment隱藏，把切換的Fragment新增上
getSupportFragmentManager().beginTransaction().hide(mFragment)
.add(R.id.frameLayout,fragment).commit();
            } else {
//如果已經新增過，則先把當前的Fragment隱藏，把切換的Fragment顯示出來
getSupportFragmentManager().beginTransaction().hide(mFragment).show(fragment).commit();
            }
mFragment = fragment;
        }
    }
}