在以下執行個體的基礎上加上點點
Android:使用ViewPager實作左右滑動切換圖檔 (簡單版)
效果預覽:
因為要把點點放圖檔上,是以修改布局為相對布局:<?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:orientation="vertical" >
<!-- 切換卡 -->
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
</android.support.v4.view.ViewPager>
<!-- 點點 -->
<LinearLayout
android:id="@+id/viewGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:gravity="center_horizontal"
android:orientation="horizontal" >
</LinearLayout>
</RelativeLayout>
程式新增:
private ImageView imageView;
private ImageView[] imageViews;
//包裹點點的LinearLayout
private ViewGroup group;
group = (ViewGroup)findViewById(R.id.viewGroup);
//有多少張圖就有多少個點點
imageViews = new ImageView[pageview.size()];
for(int i =0;i<pageview.size();i++){
imageView = new ImageView(MainActivity.this);
imageView.setLayoutParams(new LayoutParams(20,20));
imageView.setPadding(20, 0, 20, 0);
imageViews[i] = imageView;
//預設第一張圖顯示為選中狀态
if (i == 0) {
imageViews[i].setBackgroundResource(R.drawable.page_indicator_focused);
} else {
imageViews[i].setBackgroundResource(R.drawable.page_indicator_unfocused);
}
group.addView(imageViews[i]);
}
//pageView監聽器
class GuidePageChangeListener implements OnPageChangeListener{
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
//如果切換了,就把目前的點點設定為選中背景,其他設定未選中背景
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
for(int i=0;i<imageViews.length;i++){
imageViews[arg0].setBackgroundResource(R.drawable.page_indicator_focused);
if (arg0 != i) {
imageViews[i].setBackgroundResource(R.drawable.page_indicator_unfocused);
}
}
}
}
//綁定監聽事件
viewPager.setOnPageChangeListener(new GuidePageChangeListener());
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