Android_横向滑动菜单, HorizontalScrollView,Fragment,Viewpager结合使用

第一:布局

<HorizontalScrollView
android:id="@+id/hs"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="@+id/linearlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"></LinearLayout>
</HorizontalScrollView>

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

第二:主页面中

package activity.example.com.a09_12;

import android.graphics.Color;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

private String[] titles;
private List<TextView> list;
private HorizontalScrollView hs;
private LinearLayout linearlayout;
private ViewPager viewpager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取id
hs = (HorizontalScrollView)findViewById(R.id.hs);
linearlayout = (LinearLayout)findViewById(R.id.linearlayout);
viewpager = (ViewPager)findViewById(R.id.viewpager);

//创建数组,存放标题
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" };
//创建集合,存放textview
list = new ArrayList<TextView>();
//创建textview
for (int i = 0; i < titles.length; i++) {
//创建textview
TextView textView = new TextView(MainActivity.this);
textView.setText(titles[i]);
textView.setTextSize(20);
textView.setId(i+1000);
//点击事件
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int id = view.getId();
viewpager.setCurrentItem(id-1000);
}
});
//刚进程序第一个默认红色,其他为黑色
if(i ==0){
textView.setTextColor(Color.RED);
}else {
textView.setTextColor(Color.BLACK);
}
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(20,10,20,10);
//添加到布局中
linearlayout.addView(textView,layoutParams);
//添加到集合
list.add(textView);
}
//为viewpager设置适配器
viewpager.setAdapter(new Myadapter(getSupportFragmentManager()));
//viewpager的监听
viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
//滑动改变颜色
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//list中存的是 textview
for (int i = 0; i < list.size(); i++) {
if(position==i){
list.get(i).setTextColor(Color.RED);
}else{
list.get(i).setTextColor(Color.BLACK);
}
}
//获取当前的textview
TextView textView = list.get(position);
//width是每次滑动的距离
int width = textView.getWidth()+10;
//让scrollView滑动   滑动距离是textview之间的间距
hs.scrollTo(width*position,0);
}

@Override
public void onPageSelected(int position) {

}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}

class Myadapter extends FragmentPagerAdapter{

public Myadapter(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int position) {
return Fragment1.getinstance(list.get(position).getText().toString());
}

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

}

第三:自建Fragment中

package activity.example.com.a09_12;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.support.v4.media.session.PlaybackStateCompat;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;/*** Created by 壹颗大金星 on 2017/9/12.*/public class Fragment1 extends Fragment{public static Fragment getinstance(String title){//创建Fragment1Fragment1 fragment1 = new Fragment1();//创建bundleBundle bundle = new Bundle();//添加值bundle.putString("title",title);//把值添加到Arguments中fragment1.setArguments(bundle);return fragment1;}@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {//获取ArgumentsBundle arguments = getArguments();//获取值String title = arguments.getString("title");//创建textviewTextView textView = new TextView(getActivity());//设置值textView.setText(title);return textView;}}