1：布局
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.haowang.lanmu.MainActivity">
<HorizontalScrollView
android:id="@+id/hs"
android:layout_width="300dp"
android:scrollbars="none"
android:layout_height="40dp">
<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>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/viewpager"
android:layout_toEndOf="@+id/hs"
android:layout_toRightOf="@+id/hs"
android:text="频道管理" />
</RelativeLayout>
2：逻辑代码
private HorizontalScrollView hs;
private LinearLayout linearLayout;
private ViewPager viewPager;
List<TextView> list;
private ArrayList<ChannelBean> channelBeens;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
}
private void initData() {
list = new ArrayList<>();
//当前添加栏目的数据
channelBeens = new ArrayList<>();
channelBeens.add(new ChannelBean("头条",true));
channelBeens.add(new ChannelBean("娱乐",true));
channelBeens.add(new ChannelBean("科技",true));
channelBeens.add(new ChannelBean("信息",true));
channelBeens.add(new ChannelBean("八卦",true));
channelBeens.add(new ChannelBean("北京",false));
channelBeens.add(new ChannelBean("上海",false));
channelBeens.add(new ChannelBean("天津",false));
channelBeens.add(new ChannelBean("重庆",false));
channelBeens.add(new ChannelBean("大大燕网",false));
for (int i = 0; i < channelBeens.size(); i++){
TextView textView = new TextView(this);
textView.setText(channelBeens.get(i).getName()+"");
textView.setTextSize(20);
textView.setId(i+1000);
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(50,10,50,10);
//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) {
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//将数据传入频道管理
ChannelActivity.startChannelActivity(MainActivity.this,channelBeens);
}
});
}
//获取资源ID
private void initView() {
hs = (HorizontalScrollView) findViewById(R.id.hs);
linearLayout = (LinearLayout) findViewById(R.id.linearlayout);
viewPager = (ViewPager) findViewById(R.id.viewpager);
button = (Button) findViewById(R.id.button);
}
class Myadapter extends FragmentPagerAdapter {
public Myadapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
Log.i("TAG",position+"");
return Fragment1.getinstance(list.get(position).getText().toString());
}
@Override
public int getCount() {
return list.size();
}
}