Question

可能很多人（像我一样）在使用底点创建ViewPager时遇到问题，如下所示：

如何创建这样的Android ViewPager？

Answer 1

我们需要的只有ViewPager，TabLayout和2个选定和默认点的绘图。

首先，我们必须在屏幕布局中添加TabLayout，然后将其与ViewPager相关联。我们可以通过两种方式实现这一目标：

`TabLayout`

中的嵌套ViewPager

<android.support.v4.view.ViewPager
    android:id="@+id/photos_viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.TabLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</android.support.v4.view.ViewPager>

在这种情况下，TabLayout将自动与ViewPager相关联，但TabLayout将在ViewPager旁边，而不是TabLayout。

单独`<android.support.v4.view.ViewPager android:id="@+id/photos_viewpager" android:layout_width="match_parent" android:layout_height="match_parent"/> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content"/>`

TabLayout

在这种情况下，我们可以将TabLayout放在任何位置，但我们必须以编程方式将ViewPager与ViewPager pager = (ViewPager) view.findViewById(R.id.photos_viewpager); PagerAdapter adapter = new PhotosAdapter(getChildFragmentManager(), photosUrl); pager.setAdapter(adapter); TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tab_layout); tabLayout.setupWithViewPager(pager, true);连接

selected_dot.xml

一旦我们创建了布局，我们就必须准备好我们的点。因此，我们创建了三个文件：default_dot.xml，tab_selector.xml和<?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:innerRadius="0dp" android:shape="ring" android:thickness="8dp" android:useLevel="false"> <solid android:color="@color/colorAccent"/> </shape> </item> </layer-list>。

selected_dot.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="0dp"
            android:shape="ring"
            android:thickness="8dp"
            android:useLevel="false">
            <solid android:color="@android:color/darker_gray"/>
        </shape>    
    </item>
</layer-list>

default_dot.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/selected_dot"
          android:state_selected="true"/>

    <item android:drawable="@drawable/default_dot"/>
</selector>

tab_selector.xml

TabLayout

现在我们需要在XML布局中只向app:tabBackground="@drawable/tab_selector" app:tabGravity="center" app:tabIndicatorHeight="0dp"添加3行代码。

<customBinding>
  <binding name="cb">
    <security defaultAlgorithmSuite="Default"
              authenticationMode="IssuedTokenOverTransport"
              requireDerivedKeys="true"
              includeTimestamp="true"
              messageSecurityVersion="WSSecurity11WSTrust13WSSecureConversation13WSSecurityPolicy12BasicSecurityProfile10">
      <issuedTokenParameters keyType="BearerKey"
                             tokenType="http://docs.oasis-open.org/ws/oasis-wss-saml-token-profile-1.1#SAMLV2.0">
        <additionalRequestParameters>
          <trust:SecondaryParameters xmlns:trust="http://docs.oasis-open.org/ws-sx/ws-trust/200512">
            <trust:TokenType xmlns:trust="http://docs.oasis-open.org/ws-sx/ws-trust/200512">http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0</trust:TokenType>
            <trust:KeyType xmlns:trust="http://docs.oasis-open.org/ws-sx/ws-trust/200512">http://docs.oasis-open.org/ws-sx/ws-trust/200512/Bearer</trust:KeyType>
          </trust:SecondaryParameters>
        </additionalRequestParameters>
        <issuer address="xxx" />
      </issuedTokenParameters>
      <localClientSettings detectReplays="false" />
      <localServiceSettings detectReplays="false" />
    </security>
    <textMessageEncoding messageVersion="Soap12" />
    <httpsTransport />
  </binding>
</customBinding>

Answer 2

首先创建一个布局，在其中为您的View Pager显示的Dots提供一个LinerLayout

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>


    <LinearLayout
        android:id="@+id/pager_dots"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="10dp"
        android:background="@android:color/transparent"
        android:gravity="center_horizontal"
        android:orientation="horizontal">
    </LinearLayout>

</RelativeLayout>

之后创建2个drawables

<强> 1。未选择的Drawable

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="oval" xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/transparent"/>
    <size android:width="12dp" android:height="12dp"/>

    <stroke android:width="1dp" android:color="#ffffff"/>
</shape>

<强> 2。选择抽奖

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="oval" xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/transparent"/>
    <size android:width="12dp" android:height="12dp"/>

    <stroke android:width="1dp" android:color="#000000"/>
</shape>

在设置适配器之后

private LinearLayout llPagerDots;
private ViewPager viewPager;
private ArrayList<String> eventImagesUrl;
private HomeViewPagerAdapter homeViewPagerAdapter;
private ImageView[] ivArrayDotsPager;

public void setUpViewPager() {
    viewPager = (ViewPager) findViewById(R.id.view_pager);
    llPagerDots = (LinearLayout) findViewById(R.id.pager_dots);

    homeViewPagerAdapter = new HomeViewPagerAdapter(mContext, eventImagesUrl);

    viewPager.setAdapter(homeViewPagerAdapter);

    setupPagerIndidcatorDots();

    ivArrayDotsPager[0].setImageResource(R.drawable.page_indicator_selected);

    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {
            for (int i = 0; i < ivArrayDotsPager.length; i++) {
                ivArrayDotsPager[i].setImageResource(R.drawable.page_indicator_unselected);
            }
            ivArrayDotsPager[position].setImageResource(R.drawable.page_indicator_selected);
        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });
}

创建方法setupPagerIndidcatorDots（）：

private void setupPagerIndidcatorDots() {
    ivArrayDotsPager = new ImageView[eventImagesUrl.size()];
    for (int i = 0; i < ivArrayDotsPager.length; i++) {
        ivArrayDotsPager[i] = new ImageView(getActivity());
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        params.setMargins(5, 0, 5, 0);
        ivArrayDotsPager[i].setLayoutParams(params);
        ivArrayDotsPager[i].setImageResource(R.drawable.page_indicator_unselected);
        //ivArrayDotsPager[i].setAlpha(0.4f);
        ivArrayDotsPager[i].setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                view.setAlpha(1);
            }
        });
        llPagerDots.addView(ivArrayDotsPager[i]);
        llPagerDots.bringToFront();
    }

Answer 3

您可以查看我的图书馆来处理您的请求：

在您的XML布局中

  <com.tbuonomo.viewpagerdotsindicator.DotsIndicator
      android:id="@+id/dots_indicator"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      app:dotsColor="@color/colorPrimary"
      app:dotsSize="16dp"
      app:dotsWidthFactor="3"
      />

在您的Java代码中

dotsIndicator = (DotsIndicator) findViewById(R.id.dots_indicator);
viewPager = (ViewPager) findViewById(R.id.view_pager);
adapter = new ViewPagerAdapter();
viewPager.setAdapter(adapter);
dotsIndicator.setViewPager(viewPager);

Answer 4

如果您想要使用最新的 ViewPager2 和科特林

来实现类似的功能

一切都是不言自明的，无需解释！

1。您的活动或片段

val imageList = listOf(
        ImageModel(R.drawable.offer1),
        ImageModel(R.drawable.splash),
        ImageModel(R.drawable.offer1),
        ImageModel(R.drawable.splash2)
    )

    val adapter = HomeOffersAdapter()
    adapter.setItem(imageList)
    photos_viewpager.adapter = adapter

    TabLayoutMediator(tab_layout, photos_viewpager) { tab, position ->
    }.attach()
}

2。布局

<RelativeLayout 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="@dimen/dp_200">

<androidx.viewpager2.widget.ViewPager2
    android:id="@+id/photos_viewpager"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_200" />

<com.google.android.material.tabs.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_gravity="bottom|center"
    app:tabBackground="@drawable/tab_selector"
    app:tabGravity="center"
    app:tabIndicatorHeight="0dp"
    app:tabSelectedTextColor="@android:color/transparent"
    app:tabTextColor="@android:color/transparent" />

3。可绘制：tab_selector.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/dot_selected" android:state_selected="true" />
<item android:drawable="@drawable/dot_default" />

4。可绘制：dot_selected.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:innerRadius="0dp"
android:shape="ring"
android:thickness="@dimen/dp_8"
android:useLevel="false">

<solid android:color="@color/colorPrimary" />

<stroke
    android:width="@dimen/dp_1"
    android:color="@android:color/white" />

5。可绘制：dot_default.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:innerRadius="0dp"
android:shape="ring"
android:thickness="@dimen/dp_8"
android:useLevel="false">

<solid android:color="@android:color/transparent" />

<stroke
    android:width="@dimen/dp_1"
    android:color="@android:color/white" />

6。适配器

class HomeOffersAdapter : RecyclerView.Adapter<HomeOffersAdapter.HomeOffersViewHolder>() {

private var list: List<ImageModel> = listOf()


override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): HomeOffersViewHolder {
    return HomeOffersViewHolder(parent)
}


override fun onBindViewHolder(holder: HomeOffersViewHolder, position: Int) {
    holder.bind(list[position])
}

fun setItem(list: List<ImageModel>) {
    this.list = list
    notifyDataSetChanged()
}

override fun getItemCount(): Int = list.size

class HomeOffersViewHolder constructor(itemView: View) : RecyclerView.ViewHolder(itemView) {

    constructor(parent: ViewGroup) : this(
        LayoutInflater.from(parent.context).inflate(
            R.layout.pager_item,
            parent, false
        )
    )

    fun bind(imageModel: ImageModel) {
        itemView.offerImage.setImageResource(imageModel.image)
    }
}

}

7。布局：pager_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical">

<androidx.appcompat.widget.AppCompatImageView
    android:id="@+id/offerImage"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_200"
    android:adjustViewBounds="true"
    android:scaleType="fitXY"
    tools:src="@drawable/offer1" />

Answer 5

你的xml

  <RelativeLayout
                android:id="@+id/rl_speed"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_above="@+id/ll_dashboard_buttons"
                android:layout_below="@+id/ib_menu">

                <com.smart.gps.speedometer.app.utils.SmartViewPager
                    android:id="@+id/view_pager"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" 
                   app:layout_behavior="@string/appbar_scrolling_view_behavior">
                   </com.smart.gps.speedometer.app.utils.SmartViewPager>

                   <android.support.design.widget.TabLayout
                    android:id="@+id/sliding_tabs"
                    android:layout_alignParentBottom="true"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:tabBackground="@drawable/tab_selector"
                    app:tabIndicatorHeight="0dp"
                    app:tabGravity="center"
                    />

创建一个drawable。右键单击drawable - ＆gt;新的 - ＆gt;可绘制的文件资源命名该文件

tab_selector.xml

<item android:drawable="@drawable/selected_tab"
    android:state_selected="true"/>

<item android:drawable="@drawable/unselected_tab"/>

现在还有两个xml文件。再创建两个具有受尊重名称的xml文件。这些是选择指标和未选择的指标

selected_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="0dp"
            android:shape="ring"
            android:thickness="4dp"
            android:useLevel="false">
            <solid android:color="@color/highspeed"/>
        </shape>
    </item>
</layer-list>

unselected_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="0dp"
            android:shape="ring"
            android:thickness="2dp"
            android:useLevel="false">
            <solid android:color="@android:color/darker_gray"/>
        </shape>
    </item>
</layer-list>

Answer 6

将ViewFlipper和viewFlipper_linear_dot_lay（Linearlayout）放在samebaseline上，然后按照下面的一行

viewFlipper_linear_dot_lay= (LinearLayout) findViewById(R.id.dots_lay);
setupDotsOnViewPager(images_viewFlipper);
    for (int i = 0; i < images_viewFlipper.size(); i++) {
    //Add Images to ViewFlipper 
    }



private void setupDotsOnViewPager(ArrayList images_viewFlipper) {
                    images_linear = new ImageView[images_viewFlipper.size()];
                    for (int i = 0; i < images_linear.length; i++) {
                        images_linear[i] = new ImageView(this);
                        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                        params.setMargins(5, 0, 5, 0);
                        params.gravity = Gravity.BOTTOM | Gravity.CENTER;
                        images_linear[i].setLayoutParams(params);
                        images_linear[i].setImageResource(R.drawable.unselected);
                        viewFlipper_linear_dot_lay.addView(images_linear[i]);
                        viewFlipper_linear_dot_lay.bringToFront();
                    }
                }

OnRight＆amp; OnLeft获取下面的代码

for (int i = 0; i < images_linear.length; i++) {
 images_linear[i].setImageResource(R.drawable.unselected);
 }
images_linear[viewFlipper.getDisplayedChild()].setImageResource(R.drawable.selected);

Answer 7

<android.support.v4.view.ViewPager
      android:id="@+id/vpImage"
      android:layout_width="match_parent"
      android:layout_height="@dimen/_120sdp" />


<android.support.design.widget.TabLayout
      android:id="@+id/tlImage"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      app:tabBackground="@drawable/selector_product_image"
      app:tabGravity="center"
      app:tabIndicatorHeight="0dp"
      app:tabMaxWidth="12dp"
      app:tabRippleColor="@null" />

ImageAdapter imageAdapter = new ImageAdapter(context, arrayList);
vpImage.setOffscreenPageLimit(1);
vpImage.setAdapter(imageAdapter);
tlImage.setupWithViewPager(vpImage);

selector_product_image.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/image_selected" android:state_selected="true" />
    <item android:drawable="@drawable/image_unselected" />

</selector>

image_selected.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="0dp"
            android:shape="ring"
            android:thickness="4dp"
            android:useLevel="false">
            <solid android:color="@color/colorAccent" />
        </shape>
    </item>
</layer-list>

image_unselected.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="0dp"
            android:shape="ring"
            android:thickness="4dp"
            android:useLevel="false">
            <solid android:color="@color/colorPrimary" />
        </shape>
    </item>
</layer-list>

ImageAdapter.java

class ImageAdapter extends PagerAdapter {

  private Context context;
  private ArrayList<ImageModel> arrayList;
  private LayoutInflater layoutInflater;

  public ImageAdapter(Context context, ArrayList<ImageModel> arrayList) {
      this.context = context;
      this.arrayList = arrayList;
      this.layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public int getCount() {
      return arrayList.size();
  }

  @Override
  public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
      return view == ((View) o);
  }

  @Override
  public Object instantiateItem(ViewGroup container, int position) {
      View view = layoutInflater.inflate(R.layout.row_slider_image, container, false);

      AppCompatImageView ivProductImage = view.findViewById(R.id.ivProductImage);

      if (!TextUtils.isEmpty(arrayList.get(position).getImage())) {
          Glide.with(context)
                  .load(arrayList.get(position).getImage())
                  .apply(new RequestOptions().placeholder(R.drawable.no_image).error(R.drawable.no_image))
                  .into(ivProductImage);
      }

      container.addView(view);
      return view;
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
      container.removeView((View) object);
  }
}

row_slider_image.xml

<android.support.v7.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.AppCompatImageView
        android:id="@+id/ivProductImage"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/no_image" />

</android.support.v7.widget.LinearLayoutCompat>

Answer 8

添加依赖项>同步Gradle

implementation 'com.tbuonomo.andrui:viewpagerdotsindicator:4.1.2'

在您的Java代码中

 dotsIndicator = (DotsIndicator) findViewById(R.id.dots_indicator3);


myViewPagerAdapter = new MyViewPagerAdapter();
        viewPager.setAdapter(myViewPagerAdapter);
        viewPager.addOnPageChangeListener(viewPagerPageChangeListener);
        dotsIndicator.setViewPager(viewPager);

在您的布局中

<com.tbuonomo.viewpagerdotsindicator.SpringDotsIndicator
android:id="@+id/spring_dots_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:dampingRatio="0.5"
app:dotsColor="@color/material_white"
app:dotsStrokeColor="@color/material_yellow"
app:dotsCornerRadius="2dp"
app:dotsSize="16dp"
app:dotsSpacing="6dp"
app:dotsStrokeWidth="2dp"
app:stiffness="300"
/>

Answer 9

2021，如何实际操作。仅限 ViewPager2。

参考这篇优秀的短文，它有几个问题：

https://medium.com/@adrian.kuta93/android-viewpager-with-dots-indicator-a34c91e59e3a

从 2021 年的普通 Android Studio 默认项目开始，新的最小值（目前为 24）...

一般概念：

制作标准的 TabLayout，但将每个“标签单元”替换为“一个小点”而不是通常的文本。

在 TabLayout 中，您确实可以使用“tabBackground”替换每个“标签单元”：

        app:tabBackground="@drawable/tab_selector"

因此，将以下内容添加到具有 ViewPager2 的屏幕的 XML 中：

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center"
        android:background="#00FFFFFF"
        app:tabBackground="@drawable/tab_selector"
        app:tabIndicatorGravity="center"
        app:tabIndicatorHeight="0dp"/>

请注意，我们正在用我们自己的 “tab_selector” 替换每个 TabLayout 中的“标签单元”。

完全清楚，“tabBackground”是指个别的小“标签单元”，不是整个标签栏系统。

（另外，注意 tabIndicatorGravity 和 tabIndicatorHeight 这两个技巧确实会摆脱通常的“标签单位”的“框”。）

接下来以明显的方式创建三个可绘制对象，tab_selector 和两个不同的点。请参阅上述文章或此页面上的 100 个示例。

神奇代码：

在您的 onCreate 中有预期的代码...

viewPager = findViewById(R.id.simple_slide_pager);
tab_layout = findViewById(R.id.tab_layout);
viewPager.setAdapter(new ScreenSlidePagerAdapter(this));

然后这里最后是使其工作的魔术代码片段。按照上面的操作：

2021 年的最新数据：

TabLayoutMediator tabLayoutMediator =
  new TabLayoutMediator(tab_layout, viewPager, true,
    new TabLayoutMediator.TabConfigurationStrategy() {
      @Override public void onConfigureTab(
        @NonNull TabLayout.Tab tab, int position) { }
    }
);
tabLayoutMediator.attach();

完成了。

（在 onConfigureTab 中，您可以制作任何音效或任何可能需要的东西。有关更短的语法，请参阅上面@F1iX 的关键注释。）

如何使用点指示器创建Android View寻呼机？

9 个答案:

`TabLayout`

单独`<android.support.v4.view.ViewPager android:id="@+id/photos_viewpager" android:layout_width="match_parent" android:layout_height="match_parent"/> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content"/>`

selected_dot.xml

default_dot.xml

tab_selector.xml

2021，如何实际操作。仅限 ViewPager2。

一般概念：

神奇代码：

如何使用点指示器创建Android View寻呼机？

9 个答案:

TabLayout

单独<android.support.v4.view.ViewPager android:id="@+id/photos_viewpager" android:layout_width="match_parent" android:layout_height="match_parent"/> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content"/>

selected_dot.xml

default_dot.xml

tab_selector.xml

2021，如何实际操作。仅限 ViewPager2。

一般概念：

神奇代码：

`TabLayout`

单独`<android.support.v4.view.ViewPager android:id="@+id/photos_viewpager" android:layout_width="match_parent" android:layout_height="match_parent"/> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content"/>`