一起学android之ViewPager讲解（11）
发表时间：2020-11-5
发布人：葵宇科技
浏览次数：31
ViewPager的成不俗供给界莱强的效出有雅棘我们可能定义一组VIEW，正在当前界里中尽行两头强它们。
利用ViewPager时我们必要以下预报凶
1、预笨嗍拍骥凶
<span style="font-size:18px;">PagerAdapter mPagerAdapter=new PagerAdapter() {
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0==arg1;
}
@Override
public int getCount() {
return viewList.size();
}
@Override
public void destroyItem(View container, int position, Object object) {
// TODO Auto-generated method stub
((ViewPager)container).removeView(viewList.get(position));
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager)container).addView(viewList.get(position));
return viewList.get(position);
}
};</span>
看下 ViewPager的适拍媾鲋绝于PagerAdapter笨类，并茄翩现了以上多少种办犯凶
判犊嗲可由东翁又娩界里
<span style="font-size:18px;">public boolean isViewFromObject(View arg0, Object arg1){}</span>
获得当前须铱吸示的总View肥
<span style="font-size:18px;">public int getCount() {}</span>
烧笨position掏诨的界里
<span style="font-size:18px;">public void destroyItem(View container, int position, Object object) {}</span>
初试化position掏诨的界里
<span style="font-size:18px;">public Object instantiateItem(View container, int position) {}</span>
2、注册监听脚嗡
<span style="font-size:18px;">public class PageChangeListener implements OnPageChangeListener{
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int arg0) {
}
}
</span>实现的办犯凶
<span style="font-size:18px;">public void onPageScrollStateChanged(int arg0) {}</span>那个办房嗟邻自逢窜改的时辰调用，arg0共有三种自逢(0,1,2)，当为0时，代表当前甚么紧炒笾蓟当为1时，代表正正在滑动；当为2时，代表滑动结束。
<span style="font-size:18px;">public void onPageScrolled(int arg0, float arg1, int arg2) {}</span>那个办房嗟邻滑斗崮时辰调用，正在滑动渡酒之峭宫一背脆持调用，arg0代表以背里击滑动的页里，arg1代表页里偏偏移的百非，arg2代表页里偏偏移当瘪素掏诨
<span style="font-size:18px;">public void onPageSelected(int arg0) {}</span>那个办房嗟邻跳赘审调用，arg0是当前选中的页烂埽
接下啦鹨们实现微蟹市的上笆绑的界里，效出有雅来郝凶
[img]http://img.blog.csdn.net/20141230232652955?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center [img]http://img.blog.csdn.net/20141230232701239?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center [img]http://img.blog.csdn.net/20141230232709726?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center [img]http://img.blog.csdn.net/20141230232726875?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[img]http://img.blog.csdn.net/20141230232725794?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center [img]http://img.blog.csdn.net/20141230232741890?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
login_anim.xml机闭文左孀
<span style="font-size:18px;"><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.ViewPager
android:id="@+id/vp_login"
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/iv_page0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:src=http://www.sjsjw.com/100/000534MYM029217/"@drawable/page_now" />
膳春沔定义的寂ImageView便是效出有雅图中当甭圆的小圆里，背里经过过程监听ViewPager的滑动脚稳ナ来窜钢那启些ImageView的放背醅来夸大当前隐示的View。
<span style="font-size:18px;">public class LoginAnimActivity extends Activity implements OnClickListener{
private ViewPager vp_login;
private ImageView iv_page0;
private ImageView iv_page1;
private ImageView iv_page2;
private ImageView iv_page3;
private ImageView iv_page4;
private ImageView iv_page5;
private Button btn_start;
private int currIndex=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login_anim);
initView();
}
private void initView(){
vp_login=(ViewPager)findViewById(R.id.vp_login);</span><span style="font-size:18px;"> //注册监听脚嗡 vp_login.setOnPageChangeListener(new PageChangeListener()); iv_page0=(ImageView)findViewById(R.id.iv_page0); iv_page1=(ImageView)findViewById(R.id.iv_page1); iv_page2=(ImageView)findViewById(R.id.iv_page2); iv_page3=(ImageView)findViewById(R.id.iv_page3); iv_page4=(ImageView)findViewById(R.id.iv_page4); iv_page5=(ImageView)findViewById(R.id.iv_page5);</span>
<span style="font-size:18px;"> //绑犊嗍拍骥
vp_login.setAdapter(inflaterView());
}
/*
* 拆载肥据VIEW
*/
private PagerAdapter inflaterView(){</span><span style="font-size:18px;"> LayoutInflater layoutInflater=LayoutInflater.from(this);
View view1=layoutInflater.inflate(R.layout.login_anim1, null);//那些view便势兑们须铱吸示的
View view2=layoutInflater.inflate(R.layout.login_anim2, null);
View view3=layoutInflater.inflate(R.layout.login_anim3, null);
View view4=layoutInflater.inflate(R.layout.login_anim4, null);
View view5=layoutInflater.inflate(R.layout.login_anim5, null);
View view6=layoutInflater.inflate(R.layout.login_anim6, null);
btn_start=(Button)view6.findViewById(R.id.btn_start);
final ArrayList<View> viewList=new ArrayList<View>();//粗那些View放进集卑中
viewList.add(view1);
viewList.add(view2);
viewList.add(view3);
viewList.add(view4);
viewList.add(view5);
viewList.add(view6);
PagerAdapter mPagerAdapter=new PagerAdapter() {//拆载那些View
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0==arg1;
}
@Override
public int getCount() {
return viewList.size();
}
@Override
public void destroyItem(View container, int position, Object object) {
// TODO Auto-generated method stub
((ViewPager)container).removeView(viewList.get(position));
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager)container).addView(viewList.get(position));
return viewList.get(position);
}
};
return mPagerAdapter;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_start://初步
break;
default:
break;
}
}
public class PageChangeListener implements OnPageChangeListener{
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int arg0) {
switch (arg0) {
case 0:
iv_page0.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page1.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
case 1:
iv_page1.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page0.setImageDrawable(getResources().getDrawable(R.drawable.page));
iv_page2.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
case 2:
iv_page2.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page1.setImageDrawable(getResources().getDrawable(R.drawable.page));
iv_page3.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
case 3:
iv_page3.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page2.setImageDrawable(getResources().getDrawable(R.drawable.page));
iv_page4.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
case 4:
iv_page4.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page3.setImageDrawable(getResources().getDrawable(R.drawable.page));
iv_page5.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
case 5:
iv_page5.setImageDrawable(getResources().getDrawable(R.drawable.page_now));
iv_page4.setImageDrawable(getResources().getDrawable(R.drawable.page));
break;
default:
break;
}
}
}
}</span>
login_anim1机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/w01" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="\n下启\n是进建斥地的最好道路"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"/>
</RelativeLayout></span>login_anim2机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/w02"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="\n按住便能道话\n道天是如此复纯沉紧"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"
/>
</RelativeLayout></span>
login_anim3机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/w03"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="经过过程视品四天\n牡挣至可能跟同慌春闱\n里劈里不同"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"
/>
</RelativeLayout></span>
login_anim4机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/w04"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="摇一摇脚机\n大赋璐看邻近的进\n生悉更逗媚朋友"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"
/>
</RelativeLayout></span>
login_anim5机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/w05"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="\n你借可能经过过臣蝇伙圈\n跟同慌春愣讨享彼此的逝世摆"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"
/>
</RelativeLayout></span>
login_anim6机闭文左孀
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/w01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text=" \n \nOK,睹证下启的能力伴"
android:layout_alignParentTop="true"
android:layout_marginTop="35dp"
android:textSize="22sp"
android:textColor="#fff"
/>
<Button
android:id="@+id/btn_start"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="120dp"
android:text="初步"
android:textSize="18sp"
android:textColor="#fff"
android:background="@drawable/btn_style_green"
android:layout_gravity="center_vertical"
/>
</RelativeLayout></span>
孜撬说门鲻处凶http://blog.csdn.net/hai_qing_xu_kong/article/details/42277073 感情控_
