本文会实现一个类似网易新闻（不说网易新闻大家可能不知道大概是什么样子）点击超多选项卡，选项卡动态滑动的效果。
首先来看看布局，就是用HorizontalScrollView控件来实现滑动的效果，里面包含了一个布局。
效果：
特点
如丝般顺滑，这是公司产品体验过后的评价；
灵活，可以通过设置几个属性，很容易就能定制可视卡片的数量和卡片的叠加垂直偏移量、缩放比例，透明度比例；
使用方便，直接setadapter就可以使用了，数据更新调用swipeCardsView.notifyDatasetChanged(mList);就行了，下面有使用说明。
使用说明：
1xml<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".TabbarActivity">
<LinearLayout
android:id="@+id/ll_activity_tabbar_all"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<HorizontalScrollView
android:id="@+id/hs_activity_tabbar"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:background="@android:color/white"
android:fadingEdge="none"
android:scrollbars="none">
<LinearLayout
android:id="@+id/ll_activity_tabbar_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
<TextView
android:id="@+id/tv_tabname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:layout_centerInParent="true"
/>
</RelativeLayout>
2activity全部源码
import android.content.res.ColorStateList;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class TabbarActivity extends AppCompatActivity {
private HorizontalScrollView hs_activity_tabbar;
private RadioGroup myRadioGroup;
private List<String> titleList;
private LinearLayout ll_activity_tabbar_content;
private float mCurrentCheckedRadioLeft;//当前被选中的RadioButton距离左侧的距离
private String channel;
private TextView tv_tabname;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tabbar);
tv_tabname= (TextView) this.findViewById(R.id.tv_tabname);
titleList = new ArrayList<String>();
titleList.add("推荐");
titleList.add("热点");
titleList.add("北京");
titleList.add("体育");
titleList.add("娱乐");
titleList.add("足球");
titleList.add("巴萨");
titleList.add("汽车");
initGroup();
}
private void initGroup() {
hs_activity_tabbar= (HorizontalScrollView) this.findViewById(R.id.hs_activity_tabbar);
ll_activity_tabbar_content= (LinearLayout) this.findViewById(R.id.ll_activity_tabbar_content);
//选项卡布局
myRadioGroup = new RadioGroup(this);
myRadioGroup.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
myRadioGroup.setOrientation(LinearLayout.HORIZONTAL);
ll_activity_tabbar_content.addView(myRadioGroup);
for (int i = 0; i < titleList.size(); i++) {
String channel = titleList.get(i);
RadioButton radio = new RadioButton(this);
radio.setButtonDrawable(android.R.color.transparent);
radio.setBackgroundResource(R.drawable.radiobtn_selector);
ColorStateList csl = getResources().getColorStateList(R.color.radiobtn_text_color);
radio.setTextColor(csl);
LinearLayout.LayoutParams l = new LinearLayout.LayoutParams((int) SizeHelper.dp2px(this, 80), ViewGroup.LayoutParams.MATCH_PARENT, Gravity.CENTER);
radio.setLayoutParams(l);
radio.setTextSize(15);
radio.setGravity(Gravity.CENTER);
radio.setText(channel);
radio.setTag(channel);
myRadioGroup.addView(radio);
}
myRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
int radioButtonId = group.getCheckedRadioButtonId();
//根据ID获取RadioButton的实例
RadioButton rb = (RadioButton) findViewById(radioButtonId);
channel = (String) rb.getTag();
mCurrentCheckedRadioLeft = rb.getLeft();//更新当前按钮距离左边的距离
int width=(int) SizeHelper.dp2px(TabbarActivity.this, 140);
hs_activity_tabbar.smoothScrollTo((int) mCurrentCheckedRadioLeft - width, 0);
tv_tabname.setText(channel);
}
});
//设定默认被选中的选项卡为第一项
if (!titleList.isEmpty()) {
myRadioGroup.check(myRadioGroup.getChildAt(0).getId());
}
}
}
https://mp.weixin.qq.com/s/EM-dddvXL22Mh7g2_7YbGg
