Question

我有一个ViewPager包含三个页面。每个页面都有一个ImageViews，我稍后会将drawable set中的图像加载到它。

这是我的代码：

片段：

@BindView(R.id.viewPager)    
ViewPager mViewPager;

...

private List<Integer> getIntroResourceIds() {
    List<Integer> introResourceIds = new ArrayList<>();
    introResourceIds.add(R.layout.layout_intro_step1);
    introResourceIds.add(R.layout.layout_intro_step2);
    introResourceIds.add(R.layout.layout_intro_step3);
    return introResourceIds;
}

在每个布局简介中，我有一个ImageView，其ID不同。例如在layout_intro_step_1：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:weightSum="10">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_weight="3">

        <ImageView
            android:id="@+id/quickpay_intro_step3_image"
            style="@style/IntroImage" />
    </FrameLayout>
</LinearLayout>

问题是，当用户点击下一页时，我无法为每个布局简介设置图像视图。请帮我解决这个问题。

Answer 1

创建自定义寻呼机适配器

class CustomPagerAdapter extends PagerAdapter {

 int[] mResources = {

        R.drawable.first,

        R.drawable.second,

        R.drawable.third,

        R.drawable.fourth,

        R.drawable.fifth,

        R.drawable.sixth

};


    Context mContext;

    LayoutInflater mLayoutInflater;

 

    public CustomPagerAdapter(Context context) {

        mContext = context;

        mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }

 

    @Override

    public int getCount() {

        return mResources.length;

    }

 

    @Override

    public boolean isViewFromObject(View view, Object object) {

        return view == ((LinearLayout) object);

    }

 

    @Override

    public Object instantiateItem(ViewGroup container, int position) {

        View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);

 

        ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);

        imageView.setImageResource(mResources[position]);

 

        container.addView(itemView);

 

        return itemView;

    }

    @Override

    public void destroyItem(ViewGroup container, int position, Object object) {

        container.removeView((LinearLayout) object);

    }

}

在“活动设置”视图寻呼机适配器

中

mCustomPagerAdapter = new CustomPagerAdapter(this);

mViewPager = (ViewPager) findViewById(R.id.pager);

mViewPager.setAdapter(mCustomPagerAdapter);

Android - 将图像从drawable加载到ViewPager

1 个答案: