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"
>
<RelativeLayout
android:layout_width="180dp"
android:layout_height="180dp"
android:layout_centerInParent="true"
android:background="@drawable/loading_bg" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >
<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
/>
<TextView
android: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.ViewPager
android:id="@+id/whatsnew_viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" >
</android.support.v4.view.ViewPager>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="30dp"
android:gravity="center_horizontal" >
<ImageView
android:id="@+id/page0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:src="@drawable/page_now" />
<ImageView
android:id="@+id/page1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:scaleType="matrix"
android:src="@drawable/page" />
<ImageView
android:id="@+id/page2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:scaleType="matrix"
android:src="@drawable/page" />
<ImageView
android:id="@+id/page3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:scaleType="matrix"
android:src="@drawable/page" />
<ImageView
android:id="@+id/page4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:scaleType="matrix"
android:src="@drawable/page" />
<ImageView
android: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;
@Override
public 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() {
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getCount() {
return views.size();
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager)container).removeView(views.get(position));
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager)container).addView(views.get(position));
return views.get(position);
}
};
mViewPager.setAdapter(mPagerAdapter);
}
public class MyOnPageChangeListener implements OnPageChangeListener {
@Override
public 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);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public 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：