scrollviewindicater标题滑动

主界面：

import android.graphics.Color;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.HorizontalScrollView;import android.widget.LinearLayout;import android.widget.TextView;import java.util.ArrayList;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private HorizontalScrollView scrollView;    private LinearLayout layout;    private ViewPager viewPager;    private String[] titles;    private ArrayList<TextView> TextViewList;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        scrollView = (HorizontalScrollView) findViewById(R.id.scroll);        layout = (LinearLayout) findViewById(R.id.linear);        viewPager = (ViewPager) findViewById(R.id.viewpager);        titles = new String[]{"头条", "娱乐", "科技", "信息", "八卦", "北京", "上海", "天津",                "重庆", "大大燕网"};        initData();        viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {            @Override            public Fragment getItem(int position) {                return BlankFragment.getintances(titles[position]);            }            @Override            public int getCount() {                return titles.length;            }        });        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                for (int i = 0; i < TextViewList.size(); i++) {                    if (position == i) {                        TextViewList.get(i).setTextColor(Color.RED);                    } else {                        TextViewList.get(i).setTextColor(Color.BLACK);                    }                }                TextView textView = TextViewList.get(position);                int width = textView.getWidth();                scrollView.scrollTo((width + 20) * position, 0);            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }    private void initData() {        TextViewList = new ArrayList<TextView>();        for (int i = 0; i < titles.length; i++) {            TextView textView = new TextView(MainActivity.this);            textView.setText(titles[i]);            textView.setTextSize(24);            textView.setOnClickListener(this);            textView.setId(i + 10000);            if (i == 0) {                textView.setTextColor(Color.RED);            } else {                textView.setTextColor(Color.BLACK);            }            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,                    LinearLayout.LayoutParams.WRAP_CONTENT);            layoutParams.setMargins(20, 10, 20, 10);            layout.addView(textView, layoutParams);            TextViewList.add(textView);        }    }    @Override    public void onClick(View view) {        int id = view.getId();        viewPager.setCurrentItem(id-10000);    }}

Fragment：

import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;/** * 作者：李治的爷爷 * 时间：2017/10/12 */public class BlankFragment extends Fragment {    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        TextView textView = new TextView(getActivity());        Bundle bundle = getArguments();        String name = bundle.getString("name");        textView.setText(name);        return textView;    }    public static BlankFragment getintances(String name){        BlankFragment blankFragment = new BlankFragment();        Bundle bundle = new Bundle();        bundle.putString("name",name);        blankFragment.setArguments(bundle);        return blankFragment;    }}

布局：

<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:orientation="vertical"    tools:context="com.bwie.scrollviewindicater.MainActivity">    <HorizontalScrollView        android:id="@+id/scroll"        android:layout_width="wrap_content"        android:layout_height="wrap_content">        <LinearLayout            android:id="@+id/linear"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:orientation="horizontal">        </LinearLayout>    </HorizontalScrollView>    <android.support.v4.view.ViewPager        android:id="@+id/viewpager"        android:layout_width="wrap_content"        android:layout_height="wrap_content">    </android.support.v4.view.ViewPager></LinearLayout>