ViewPager首次安装引导页（中级代码）
来源：互联网 发布：手机数据删除怎么恢复 编辑：程序博客网 时间：2024/06/05 09:06
它下面加圆点或者文字描述，其实是ViewPager和textvIEW等等布局在一个文件里面，其它布局通过监听viewPager的变化来动态改变自己而已，就是如此，一点也不神奇。
package com.example.listviewdemo;import android.app.Activity;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.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.ImageView.ScaleType;import android.widget.LinearLayout;/** *http://blog.csdn.net/qinyuanpei/article/details/17186319 *这有几篇文章 * *其实，下面的几个圆点是通过我们相对布局来弄上的，与本身的ViewPager并没有太大关系。 */public class BannerActivity extends Activity implements OnClickListener {ViewPager mViewPager ;PagerAdapter mPagerAdapter ;private int[] draws = new int[]{R.drawable.bg,R.drawable.empty_paper_tape,R.drawable.login_warring_pic,R.drawable.share_tellfriends_bg,R.drawable.splash_bg}; //记录当前选中位置 private int currentIndex; //底部小图片 private ImageView[] dots ; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.banner);mViewPager = (ViewPager)findViewById(R.id.banner);initAdapter();mViewPager.setAdapter(mPagerAdapter);initListener();//初始化底部小点 initDots();}private void initDots(){dots = new ImageView[draws.length];LinearLayout ll = (LinearLayout)findViewById(R.id.ll);for (int i = 0; i < draws.length; i++) {dots[i] = (ImageView)ll.getChildAt(i);dots[i].setEnabled(true);dots[i].setOnClickListener(this);dots[i].setTag(i);//设置位置tag，方便取出与当前位置对应 }currentIndex = 0;dots[currentIndex].setEnabled(false);}private void initAdapter(){mPagerAdapter = new PagerAdapter() {@Overridepublic Object instantiateItem(ViewGroup container, int position) {ImageView imageView = new ImageView(BannerActivity.this);imageView.setScaleType(ScaleType.FIT_XY);imageView.setImageResource(draws[position]);container.addView(imageView);return imageView;}@Overridepublic void destroyItem(ViewGroup container, int position,Object object) {ImageView imageView = new ImageView(BannerActivity.this);imageView.setScaleType(ScaleType.FIT_XY);imageView.setImageResource(draws[position]);container.removeView(imageView);}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == (View)arg1;}@Overridepublic int getCount() {return draws == null ? 0 : draws.length;//因为会有一个左右尽头的数据}};}private void initListener(){mViewPager.setOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int pos) {setCurDot(pos);}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int arg0) {}});}private void setCurDot(int positon){ if (positon < 0 || positon > draws.length - 1 || currentIndex == positon) { return; } dots[positon] .setEnabled(false); dots[currentIndex].setEnabled(true); currentIndex = positon;}private void setCurView(int position){if (position < 0 || position >= draws.length) { return; } mViewPager.setCurrentItem(position);}@Overridepublic void onClick(View v) {int pos = (Integer)v.getTag();setCurDot(pos);setCurView(pos);}}<?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.support.v4.view.ViewPager android:id="@+id/banner" android:layout_width="match_parent" android:layout_height="match_parent" android:fadingEdge="none"/> <LinearLayout android:id="@+id/ll" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="24.0dip" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:clickable="true" android:padding="15.0dip" android:src="@drawable/dot" /> </LinearLayout> </RelativeLayout>
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:innerRadiusRatio="3" android:shape="ring" android:thickness="10dp" android:useLevel="false" > <solid android:color="#FF0000" /> <size android:height="10dp" android:width="10dp" /></shape>
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:innerRadiusRatio="3" android:shape="ring" android:thickness="10dp" android:useLevel="false" > <solid android:color="#0000FF" /> <size android:height="10dp" android:width="10dp" /></shape>
<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android" > <item android:state_enabled="true" android:drawable="@drawable/circlewhite"></item> <item android:state_enabled="false" android:drawable="@drawable/circleblack"></item></selector>
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