Android从0到完整项目（2）启动页与底部导航

实现启动页与底部导航

前言

刚工作的时候与写andBase大神一起工作，所以用了很多他造的轮子，现在也会用到一些常用的工具类，封装成自己的库。

1. 使用Android 导入库 myLibary

http://download.csdn.net/detail/chinaltz/9811788

点击File--->New---->New Module

项目 点右键 ---> OPen Module Settings

点+ 号

完成

启动页面

主页

2.实现

一.启动页面 实现可以有多种
（1）倒计时

 public class MyCount extends CountDownTimer {


        public MyCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onFinish() {

            Intent in = new Intent(mContext, MainActivity.class);
            startActivity(in);
            finish();

        }

        @Override
        public void onTick(long millisUntilFinished) {

            long second = millisUntilFinished / 1000;
            countButton.setText("跳过|" + second + "s");

        }

    }

（2）延时

   new Handler().postDelayed(new Runnable() {
            public void run() {
                /* Create an Intent that will start the Main WordPress Activity. */
                Intent mainIntent = new Intent(splashScreen.this, wpAndroid.class);
                splashScreen.this.startActivity(mainIntent);
                splashScreen.this.finish();
            }
        }, 2900);

二.底部导航(Tab)

1. ViewPager + RadioButton
   http://blog.csdn.net/chinaltz/article/details/40817753
   2.Fragment+RadioButton
   http://blog.csdn.net/chinaltz/article/details/40145407
2. ViewPager +TabLayout
   本例实现

tabLayout.setupWithViewPager(viewPager);

        //设置ViewPager 是否可以滑动
        viewPager.setPagingEnabled(true);

        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {


                for (int i = 0; i < titleList.length; i++) {
                    TabLayout.Tab tab = tabLayout.getTabAt(i);
                    View view = tab.getCustomView();
                    ImageView img = (ImageView) view.findViewById(R.id.tab_icon);
                    TextView title = (TextView) view.findViewById(R.id.tab_title);

                    if (position == i) {
                        img.setImageResource(icons_press[i]);
                        title.setTextColor(getResources().getColor(R.color.mainColor));
                    } else {
                        img.setImageResource(icons[i]);
                        title.setTextColor(getResources().getColor(R.color.gray));
                    }


                }
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });


        //为TabLayout添加tab名称
        for (int i = 0; i < titleList.length; i++) {
            TabLayout.Tab tab = tabLayout.getTabAt(i);
            tab.setCustomView(getTabView(i));
        }

/**
* 添加getTabView的方法，来进行自定义Tab的布局View
*
* @param position
* @return
*/
public View getTabView(int position) {
LayoutInflater mInflater = LayoutInflater.from(this);
View view = null;

    view = mInflater.inflate(R.layout.item_bottom_tab, null);
    AutoUtils.auto(view);

    TextView tv = (TextView) view.findViewById(R.id.tab_title);
    tv.setText(titleList[position]);
    ImageView img = (ImageView) view.findViewById(R.id.tab_icon);
    if (position == 0) {
        tv.setTextColor(getResources().getColor(R.color.mainColor));
        img.setImageResource(icons_press[position]);
    } else {
        tv.setTextColor(getResources().getColor(R.color.gray));
        img.setImageResource(icons[position]);
    }
    return view;
}

4.BottomNavigationView 新版Android 创建项目 可以学习

![BottomNavigationView](http://upload-images.jianshu.io/upload_images/2595860-16b8721a75d3696c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)



GitHub   代码在这  https://github.com/chinaltz/JustAndroid
会不定时更新