上一篇《是男人就下100层【第一层】——高仿微信界面（3）》中我们完成了登录，这一篇看完成登录后的一个短暂加载和引导界面。

加载界面：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent">  <RelativeLayoutandroid:layout_width="180dp"android:layout_height="180dp"android:layout_centerInParent="true"android:background="@drawable/loading_bg" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:gravity="center"android:orientation="vertical" ><ProgressBarandroid:id="@+id/progressBar1"style="?android:attr/progressBarStyleLarge"android:layout_width="wrap_content"android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="正在登录"android:layout_marginTop="10dp"android:textColor="#fff"android:textSize="20sp"/></LinearLayout></RelativeLayout></RelativeLayout>

定义了一个ProgressBar，效果如下：

再来看看引导界面的实现

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" >  <android.support.v4.view.ViewPagerandroid:id="@+id/whatsnew_viewpager"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center" > </android.support.v4.view.ViewPager>  <LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal"> <LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_gravity="bottom"android:layout_marginBottom="30dp" android:gravity="center_horizontal"     ><ImageViewandroid:id="@+id/page0"android:layout_width="wrap_content"android:layout_height="wrap_content"                 android:scaleType="matrix"android:src="@drawable/page_now" /><ImageViewandroid:id="@+id/page1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"                    android:scaleType="matrix"android:src="@drawable/page" /><ImageViewandroid:id="@+id/page2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"                    android:scaleType="matrix"android:src="@drawable/page" /><ImageViewandroid:id="@+id/page3"android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_marginLeft="10dp"                   android:scaleType="matrix"android:src="@drawable/page" /><ImageViewandroid:id="@+id/page4"android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_marginLeft="10dp"                   android:scaleType="matrix"android:src="@drawable/page" /><ImageViewandroid:id="@+id/page5"android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_marginLeft="10dp"                   android:scaleType="matrix"android:src="@drawable/page" />           </LinearLayout></LinearLayout></FrameLayout>

在上面我们使用到了一个ViewPager组件，这个组件的作用是时图片可以左右滑动，使用方法详见：http://www.uml.org.cn/mobiledev/201211294.asp

定义的ViewPage的适配器以及下部的选中状态ImageView的设置如下：

package com.example.weixin.activity;import java.util.ArrayList;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;import com.example.weixin.R;public class Whatsnew extends Activity {private ViewPager mViewPager;   private ImageView mPage0;private ImageView mPage1;private ImageView mPage2;private ImageView mPage3;private ImageView mPage4;private ImageView mPage5;private int currIndex = 0;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.whatsnew_viewpager);mViewPager = (ViewPager)findViewById(R.id.whatsnew_viewpager);        mViewPager.setOnPageChangeListener(new MyOnPageChangeListener());mPage0 = (ImageView)findViewById(R.id.page0);mPage1 = (ImageView)findViewById(R.id.page1);mPage2 = (ImageView)findViewById(R.id.page2);mPage3 = (ImageView)findViewById(R.id.page3);mPage4 = (ImageView)findViewById(R.id.page4);mPage5 = (ImageView)findViewById(R.id.page5);//将要分页显示的View装入数组中LayoutInflater mLi = LayoutInflater.from(this);View view1 = mLi.inflate(R.layout.whats1, null);View view2 = mLi.inflate(R.layout.whats2, null);View view3 = mLi.inflate(R.layout.whats3, null);View view4 = mLi.inflate(R.layout.whats4, null);View view5 = mLi.inflate(R.layout.whats5, null);View view6 = mLi.inflate(R.layout.whats6, null);//每个页面的view数据final ArrayList<View> views = new ArrayList<View>();views.add(view1);views.add(view2);views.add(view3);views.add(view4);views.add(view5);views.add(view6);//填充ViewPager的数据适配器PagerAdapter mPagerAdapter = new PagerAdapter() {@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == arg1;}@Overridepublic int getCount() {return views.size();}@Overridepublic void destroyItem(View container, int position, Object object) {((ViewPager)container).removeView(views.get(position));}@Overridepublic Object instantiateItem(View container, int position) {((ViewPager)container).addView(views.get(position));return views.get(position);}};mViewPager.setAdapter(mPagerAdapter);}    public class MyOnPageChangeListener implements OnPageChangeListener {@Overridepublic void onPageSelected(int arg0) {switch (arg0) {case 0:              mPage0.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage1.setImageDrawable(getResources().getDrawable(R.drawable.page));break;case 1:mPage1.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage0.setImageDrawable(getResources().getDrawable(R.drawable.page));mPage2.setImageDrawable(getResources().getDrawable(R.drawable.page));break;case 2:mPage2.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage1.setImageDrawable(getResources().getDrawable(R.drawable.page));mPage3.setImageDrawable(getResources().getDrawable(R.drawable.page));break;case 3:mPage3.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage4.setImageDrawable(getResources().getDrawable(R.drawable.page));mPage2.setImageDrawable(getResources().getDrawable(R.drawable.page));break;case 4:mPage4.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage3.setImageDrawable(getResources().getDrawable(R.drawable.page));mPage5.setImageDrawable(getResources().getDrawable(R.drawable.page));break;case 5:mPage5.setImageDrawable(getResources().getDrawable(R.drawable.page_now));mPage4.setImageDrawable(getResources().getDrawable(R.drawable.page));break;}currIndex = arg0;//animation.setFillAfter(true);// True:图片停在动画结束位置//animation.setDuration(300);//mPageImg.startAnimation(animation);}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int arg0) {}}public void startbutton(View v) {  Intent intent = new Intent();intent.setClass(Whatsnew.this,WhatsnewDoor.class);startActivity(intent);this.finish();}  }

最后的运行效果：