带有页面指示器的 Android 视图寻呼机 [英] Android view pager with page indicator

问题描述

我需要在带有图像的视图寻呼机文件中获取页面指示器.这是我的代码.

I need to get page indicator in the view pager file with images. Here is my code.

public class IndicatorActivity extends Activity {


 /** Called when the activity is first created. */
    @Override

        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

            MyPagerAdapter adapter = new MyPagerAdapter();
            ViewPager myPager = (ViewPager) findViewById(R.id.pager);
            myPager.setAdapter(adapter);
            myPager.setCurrentItem(0);
            TitlePageIndicator indicator = (TitlePageIndicator)findViewById(R.id.indicat);
            indicator.setViewPager( myPager );
    }
}

在此代码中，我在 TitlePageIndicator indicator = (TitlePageIndicator)findViewById(R.id.indicat); 中遇到错误，因为 TitlePageIndicator 无法解析为类型.这是什么错误.我该如何解决?

In this code, i got an error in TitlePageIndicator indicator = (TitlePageIndicator)findViewById(R.id.indicat); as TitlePageIndicator cannot be resolved to a type. What is this error. How can I resolve it?

这是我的 xml 代码:

here is my xml code:

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

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
         />
    <com.viewpagerindicator.TitlePageIndicator
    android:id="@+id/indicat"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent" />
</LinearLayout>

TitlePageIndicator需要写什么代码?我想在不使用片段的情况下做到这一点.

我还创建了一个类如:

class MyPagerAdapter extends PagerAdapter {

     private static Integer[] titles = new Integer[] 
                { 
        R.drawable.jk,R.drawable.lm,R.drawable.no
                };

    public int getCount() {
            return 3;
    }

    public Object instantiateItem(View collection, int position) {

            LayoutInflater inflater = (LayoutInflater) collection.getContext()
                            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View view;
            ImageView iv;

            view = inflater.inflate(R.layout.first, null);

            ((ViewPager) collection).addView(view, 0);
            switch (position) {
            case 0:
                iv = (ImageView)view.findViewById(R.id.imageView1);
                iv.setImageResource(titles[position]);
                    break;
            case 1:
                iv = (ImageView)view.findViewById(R.id.imageView1);
                iv.setImageResource(titles[position]);
                    break;
            case 2:
                 iv = (ImageView)view.findViewById(R.id.imageView1);
                iv.setImageResource(titles[position]);
                    break;
            }
            return view;
    }

    public void destroyItem(View arg0, int arg1, Object arg2) {
            ((ViewPager) arg0).removeView((View) arg2);

    }



    public boolean isViewFromObject(View arg0, Object arg1) {
            return arg0 == ((View) arg1);

    }

}

除了这门课，我还想做点什么吗?

Did I want to do anything more than this class?

提前感谢您的帮助

推荐答案

你需要做以下几件事:

1-如果您还没有这样做，请下载 库.

1-Download the library if you haven't already done that.

2- 导入 Eclipse.

2- Import into Eclipse.

3- 设置您的项目以使用该库:Project-> Properties -> Android -> 向下滚动到 Library 部分，单击 Add... 并选择 viewpagerindicator.

3- Set you project to use the library: Project-> Properties -> Android -> Scroll down to Library section, click Add... and select viewpagerindicator.

4- 现在您应该可以导入 com.viewpagerindicator.TitlePageIndicator.

4- Now you should be able to import com.viewpagerindicator.TitlePageIndicator.

现在关于在不使用片段的情况下实现这一点:

Now about implementing this without using fragments:

在 viewpagerindicatior 附带的示例中，您可以看到该库正在与具有 FragmentPagerAdapter 的 ViewPager 一起使用.

In the sample that comes with viewpagerindicatior, you can see that the library is being used with a ViewPager which has a FragmentPagerAdapter.

但实际上库本身是 Fragment 独立的.它只需要一个ViewPager.所以只需使用 PagerAdapter 而不是 FragmentPagerAdapter 就可以了.

But in fact the library itself is Fragment independant. It just needs a ViewPager. So just use a PagerAdapter instead of a FragmentPagerAdapter and you're good to go.

这篇关于带有页面指示器的 Android 视图寻呼机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！