本文实例为大家分享了Android实现启动引导图的具体代码，供大家参考，具体内容如下
下面是安卓启动引导图的实现，话不多说，直接上代码。
1.布局文件：activity_guide.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/guide_vp"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="@+id/ll_guide_point"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:gravity="center_horizontal"
android:orientation="horizontal" />
<ImageButton
android:id="@+id/guide_ib_start"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center_vertical"
android:layout_marginBottom="120dp"
android:src="@mipmap/img_guide_start"
android:visibility="gone" />
</RelativeLayout>
2.关于的ViewPager的适配器GuidePageAdapter.java
/**
* Created by gdk on 2019/7/22 14:55
* Describe:安装apk第一次启动的引导页
*
* @author gdk
*/
public class GuidePageAdapter extends PagerAdapter {
//存放图片的集合
private List<View> viewList;
public GuidePageAdapter(List<View> viewList) {
this.viewList = viewList;
}
/**
* @return 返回页面的个数
*/
@Override
public int getCount() {
if (viewList != null) {
return viewList.size();
}
return 0;
}
/**
* 判断对象是否生成界面
*
* @param view
* @param object
* @return
*/
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
/**
* 初始化position位置的界面
*
* @param container
* @param position
* @return
*/
@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(viewList.get(position));
return viewList.get(position);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(viewList.get(position));
}
}
3.引导页的Activity，GuideActivity.java
/**
* 第一次安装的引导页
* Created by gdk on 2019-07-22
*
* @author gdk
*/
public class GuideActivity extends BaseActivity<LoginContract.Presenter> implements LoginContract.View, ViewPager.OnPageChangeListener {
@BindView(R.id.guide_ib_start)
ImageButton guideIbStart;
@BindView(R.id.guide_vp)
ViewPager guideVp;
@BindView(R.id.ll_guide_point)
LinearLayout llGuidePoint;
private int[] imagePositionArray;//图片资源的数组
private List<View> viewList;//图片资源的集合
//实例化原点View
private ImageView iv_point;
private ImageView[] ivPointArray;
@Override
public int getLayoutId() {
return R.layout.activity_guide;
}
@Override
public LoginContract.Presenter initPresenter() {
return new LoginPresenter(this);
}
@Override
public void initView() {
//加载滑动的ViewPager
initViewPager();
//加载底部圆点
initPoint();
}
@OnClick({R.id.ll_guide_point, R.id.guide_ib_start})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.guide_ib_start:
//从启动页跳转到引导页，修改保存的值，再次进入时跳过此页面。
SpUitlsInfo.putString(GuideActivity.this, "VERSION", "1");
startActivity(new Intent(GuideActivity.this, MainActivity.class));
break;
default:
break;
}
}
/**
* 加载底部圆点
*/
private void initPoint() {
//这里实例化LinearLayout
llGuidePoint = findViewById(R.id.ll_guide_point);
//根据ViewPager的item数量实例化数组
ivPointArray = new ImageView[viewList.size()];
//循环新建底部圆点ImageView，将生成的ImageView保存到数组中
int size = viewList.size();
for (int i = 0; i < size; i++) {
iv_point = new ImageView(this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
//设置小圆点的间距
lp.setMargins(20, 0, 20, 0);
iv_point.setLayoutParams(lp);
ivPointArray[i] = iv_point;
//第一个页面需要设置为选中状态，这里采用两张不同的图片
if (i == 0) {
iv_point.setBackgroundResource(R.drawable.guide_dot_select);
} else {
iv_point.setBackgroundResource(R.drawable.guide_dot_unselect);
}
//将数组中的ImageView加入到ViewGroup
llGuidePoint.addView(ivPointArray[i]);
}
}
/**
* 加载图片ViewPager
*/
private void initViewPager() {
//实例化图片资源
imagePositionArray = new int[]{R.mipmap.img_guide_one, R.mipmap.img_guide_two, R.mipmap.img_guide_three,
R.mipmap.img_guide_four};
viewList = new ArrayList<>();
//获取一个Layout参数，设置为全屏
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
//循环创建View并加入到集合中
int len = imagePositionArray.length;
for (int i = 0; i < len; i++) {
//new ImageView并设置全屏和图片资源
ImageView imageView = new ImageView(this);
imageView.setLayoutParams(params);
imageView.setBackgroundResource(imagePositionArray[i]);
//将ImageView加入到集合中
viewList.add(imageView);
}
//View集合初始化好后，设置Adapter
guideVp.setAdapter(new GuidePageAdapter(viewList));
//设置滑动监听
guideVp.setOnPageChangeListener(this);
}
@Override
public void onResult(Object result, String message) {
}
@Override
public void onError(Throwable throwable, String message) {
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
/**
* 滑动后的监听
*
* @param position
*/
@Override
public void onPageSelected(int position) {
//循环设置当前页的标记图
int length = imagePositionArray.length;
for (int i = 0; i < length; i++) {
ivPointArray[position].setBackgroundResource(R.drawable.guide_dot_select);
if (position != i) {
ivPointArray[i].setBackgroundResource(R.drawable.guide_dot_unselect);
}
}
//判断是否是最后一页，若是则显示按钮
if (position == imagePositionArray.length - 1) {
guideIbStart.setVisibility(View.VISIBLE);
} else {
guideIbStart.setVisibility(View.GONE);
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ButterKnife.bind(this);
}
}
涉及到两个布局文件
guide_dot_select.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="@color/white"></solid>
<corners android:radius="3dp" />
<size
android:width="8dp"
android:height="8dp" />
</shape>
guide_dot_unselect.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="@color/colorPrimaryDark"></solid>
<corners android:radius="3dp" />
<size
android:width="8dp"
android:height="8dp" />
</shape>
4.总结，代码中的注释比较详细，各位博友都能看懂，没有效果图，里面涉及的图片请使用简单的替代就行。
