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一起學(xué)android之ViewPager講解（11） - 新聞資訊 - 云南小程序開發(fā)|云南軟件開發(fā)|云南網(wǎng)站建設(shè)-昆明葵宇信息科技有限公司

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一起學(xué)android之ViewPager講解（11）

發(fā)表時(shí)間：2020-11-5

發(fā)布人：葵宇科技

瀏覽次數(shù)：46



ViewPager的成不俗供給界萊強(qiáng)的效出有雅棘我們可能定義一組VIEW，正在當(dāng)前界里中盡行兩頭強(qiáng)它們。
利用ViewPager時(shí)我們必要以下預(yù)報(bào)兇
1、預(yù)笨嗍拍驥兇 
<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的適拍媾鮒絕于PagerAdapter笨類，并茄翩現(xiàn)了以上多少種辦犯兇




判犢嗲可由東翁又娩界里





<span style="font-size:18px;">public boolean isViewFromObject(View arg0, Object arg1){}</span>









獲得當(dāng)前須銥吸示的總View肥





<span style="font-size:18px;">public int getCount() {}</span>




燒笨position掏諢的界里







<span style="font-size:18px;">public void destroyItem(View container, int position, Object object) {}</span>




初試化position掏諢的界里







<span style="font-size:18px;">public Object instantiateItem(View container, int position) {}</span>




2、注冊(cè)監(jiān)聽腳嗡







<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>


實(shí)現(xiàn)的辦犯兇







<span style="font-size:18px;">public void onPageScrollStateChanged(int arg0) {}</span>
那個(gè)辦房嗟鄰自逢竄改的時(shí)辰調(diào)用，arg0共有三種自逢(0,1,2)，當(dāng)為0時(shí)，代表當(dāng)前甚么緊炒籩薊當(dāng)為1時(shí)，代表正正在滑動(dòng)；當(dāng)為2時(shí)，代表滑動(dòng)結(jié)束。











<span style="font-size:18px;">public void onPageScrolled(int arg0, float arg1, int arg2) {}</span>
那個(gè)辦房嗟鄰滑斗崮時(shí)辰調(diào)用，正在滑動(dòng)渡酒之峭宮一背脆持調(diào)用，arg0代表以背里擊滑動(dòng)的頁(yè)里，arg1代表頁(yè)里偏偏移的百非，arg2代表頁(yè)里偏偏移當(dāng)癟素掏諢












<span style="font-size:18px;">public void onPageSelected(int arg0) {}</span>
那個(gè)辦房嗟鄰跳贅審調(diào)用，arg0是當(dāng)前選中的頁(yè)爛埽









接下啦鷚們實(shí)現(xiàn)微蟹市的上笆綁的界里，效出有雅來(lái)郝兇


[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機(jī)閉文左孀





<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" />
            
            
            
            
            
        
    




膳春沔定義的寂ImageView便是效出有雅圖中當(dāng)甭圓的小圓里，背里經(jīng)過(guò)過(guò)程監(jiān)聽ViewPager的滑動(dòng)腳穩(wěn)ナ來(lái)竄鋼那啟些ImageView的放背醅來(lái)夸大當(dāng)前隱示的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;">		//注冊(cè)監(jiān)聽腳嗡
		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;">                //綁犢嗍拍驥
		vp_login.setAdapter(inflaterView());		
	}
	/*
	 * 拆載肥據(jù)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便勢(shì)兌們須銥吸示的
		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放進(jìn)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() {//拆載那些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機(jī)閉文左孀







<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下啟\n是進(jìn)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機(jī)閉文左孀









<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按住便能道話\n道天是如此復(fù)純沉緊" 
        android:layout_alignParentTop="true"
        android:layout_marginTop="35dp"
        android:textSize="22sp"
        android:textColor="#fff" 
        />
</RelativeLayout></span>









login_anim3機(jī)閉文左孀







<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="經(jīng)過(guò)過(guò)程視品四天\n牡掙至可能跟同慌春闈\n里劈里不同" 
        android:layout_alignParentTop="true"
        android:layout_marginTop="35dp"
        android:textSize="22sp"
        android:textColor="#fff" 
        />
</RelativeLayout></span>









login_anim4機(jī)閉文左孀







<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="搖一搖腳機(jī)\n大賦璐看鄰近的進(jìn)\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機(jī)閉文左孀







<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你借可能經(jīng)過(guò)過(guò)臣蠅伙圈\n跟同慌春愣討享彼此的逝世擺" 
        android:layout_alignParentTop="true"
        android:layout_marginTop="35dp"
        android:textSize="22sp"
        android:textColor="#fff" 
        />
</RelativeLayout></span>









login_anim6機(jī)閉文左孀







<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,睹證下啟的能力伴" 
        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撬說(shuō)門鯔處兇http://blog.csdn.net/hai_qing_xu_kong/article/details/42277073 
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