Android 简单引导页实现

注意：该demo只能适应几张图片滑动。如果多了需要参考自定义viewgroup引导页实现

实现了动态添加小圆点，滑动到当前页设置选中，滑动到最后一页时显示立即进入按钮。

1.动态添加小圆点

/** * 添加小圆点 */private void addPoint() {// 1.根据图片多少，添加多少小圆点for (int i = 0; i < imageView.length; i++) {LinearLayout.LayoutParams pointParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);if (i < 1) {pointParams.setMargins(0, 0, 0, 0);}else{pointParams.setMargins(10, 0, 0, 0);}ImageView iv = new ImageView(this);iv.setLayoutParams(pointParams);iv.setBackgroundResource(R.drawable.point_normal);llPoint.addView(iv);}llPoint.getChildAt(0).setBackgroundResource(R.drawable.point_select);}

根据图片的多少添加多少小圆点。然后添加到布局中。

2.判断选中小圆点

for (int i = 0; i < imageView.length; i++) {if (i == position) {llPoint.getChildAt(position).setBackgroundResource(R.drawable.point_select);} else {llPoint.getChildAt(i).setBackgroundResource(R.drawable.point_normal);}}

通过viewpager的监听事件可以设置选中的小圆点和未选中的小圆点

3.当滑动到最后一页时显示立即进入按钮，其实也是判断viewpager的事件。当滑动到最后一个时显示就行。其它时候都隐藏

// 3.当滑动到最后一个添加按钮点击进入，if (position == imageView.length - 1) {textView.setVisibility(View.VISIBLE);} else {textView.setVisibility(View.GONE);}

下面看是完整代码

public class GuideViewActivity extends BaseActivity {private ViewPager viewPage;// 图片private int[] imageView = { R.drawable.yindaoye1, R.drawable.yindaoye2,R.drawable.yindaoye3, R.drawable.yindaoye4 };private List<View> list;// 底部小点的图片private LinearLayout llPoint;//立即进入按钮private TextView textView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.guide_view_acitivyt);initview();initoper();addView();addPoint();}private void initoper() {// 进入按钮textView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {PageManage.toPageKeepOldPageState(PageDataKey.login);finish();}});// 2.监听当前显示的页面，将对应的小圆点设置为选中状态，其它设置为未选中状态viewPage.addOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int position) {monitorPoint(position);}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int arg0) {UIUtils.log("arg0--" + arg0);}});}private void initview() {viewPage = (ViewPager) findViewById(R.id.viewpage);llPoint = (LinearLayout) findViewById(R.id.llPoint);textView = (TextView) findViewById(R.id.guideTv);}/** * 添加图片到view */private void addView() {list = new ArrayList<View>();// 将imageview添加到viewLinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);for (int i = 0; i < imageView.length; i++) {ImageView iv = new ImageView(this);iv.setLayoutParams(params);iv.setScaleType(ScaleType.FIT_XY);iv.setImageResource(imageView[i]);list.add(iv);}// 加入适配器viewPage.setAdapter(new GuideViewAdapter(list));}/** * 添加小圆点 */private void addPoint() {// 1.根据图片多少，添加多少小圆点for (int i = 0; i < imageView.length; i++) {LinearLayout.LayoutParams pointParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);if (i < 1) {pointParams.setMargins(0, 0, 0, 0);} else {pointParams.setMargins(10, 0, 0, 0);}ImageView iv = new ImageView(this);iv.setLayoutParams(pointParams);iv.setBackgroundResource(R.drawable.point_normal);llPoint.addView(iv);}llPoint.getChildAt(0).setBackgroundResource(R.drawable.point_select);}/** * 判断小圆点 *  * @param position */private void monitorPoint(int position) {for (int i = 0; i < imageView.length; i++) {if (i == position) {llPoint.getChildAt(position).setBackgroundResource(R.drawable.point_select);} else {llPoint.getChildAt(i).setBackgroundResource(R.drawable.point_normal);}}// 3.当滑动到最后一个添加按钮点击进入，if (position == imageView.length - 1) {textView.setVisibility(View.VISIBLE);} else {textView.setVisibility(View.GONE);}}}

对应的 xml

<?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/viewpage"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <LinearLayout        android:id="@+id/llPoint"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_marginBottom="24.0dip"        android:gravity="center_horizontal"        android:orientation="horizontal" >          </LinearLayout><TextView     android:id="@+id/guideTv"    android:layout_width="130dp"    android:layout_height="40dp"    android:text="立即体验"    android:textColor="#ffffff"    android:background="#88000000"    android:textSize="14sp"    android:gravity="center"    android:layout_above="@id/llPoint"    android:layout_centerHorizontal="true"    android:layout_marginBottom="20dp"    android:visibility="gone"    /></RelativeLayout>

所用的适配器

public class GuideViewAdapter extends PagerAdapter {private List<View> list;public GuideViewAdapter(List<View> list) {this.list = list;}@Overridepublic int getCount() {return list.size();}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == arg1;}@Overridepublic void destroyItem(ViewGroup view, int position, Object object) {view.removeView(list.get(position));}@Overridepublic Object instantiateItem(ViewGroup container, int position) {container.addView(list.get(position));return list.get(position);}}

下面有几个不错的引导页开源框架：

1.CircleIndicator

一个轻量级的viewpager指示器 ，类似于nexus5 启动器的效果。它可以自定义指示器上小圆点的样式和动画效果。可以用于引导页。

项目地址：https://github.com/ongakuer/CircleIndicator

2.Guideshow

Guideshow使你简单、快速的构建引导页。另外，你无须生成动态的gif图片就可使页面产生动画效果，如平移、渐变。
项目地址： https://github.com/javajavadog/guideshow

3.AppIntro

尝试使用了下，确实是个漂亮的控件，而且使用也很简单，推荐使用。

项目地址：https://github.com/PaoloRotolo/AppIntro

4.SwitchViewDemo

一个简单的引导页实现。值得推荐的是这完全是个单独的控件，而不是借助ViewPager实现的。作者完全是扩展ViewGroup做的。

框架原文：http://j.news.163.com/docs/28/2015092010/B3US4ART90014ARU.html