头部滑动"/>
HorizontalScrollView头部滑动
//写布局
<LinearLayout xmlns:android=""
xmlns:tools=""
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<!-- ScrollView:容器,内部东西多了之后,就可以滑动 -->
<!-- ScrollView:只能有一个孩子 -->
<HorizontalScrollView
android:id="@+id/hsv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:id="@+id/ll_head"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</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>
//在activity进行添加头部内容进行滑动
public class MainActivity extends FragmentActivity implements OnClickListener {
private LinearLayout ll_head;
private ViewPager viewPager;
private String[] titles;
private ArrayList<TextView> textViewList;
private HorizontalScrollView horizontalScrollView;
private ArrayList<TextView> arrayList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ll_head = (LinearLayout) findViewById(R.id.ll_head);
horizontalScrollView = (HorizontalScrollView) findViewById(R.id.hsv);
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" };
//封装数组的数据
arrayList = new ArrayList<TextView>();
for (int i = 0; i < titles.length; i++) {
TextView textView = new TextView(this);
arrayList.add(textView);
//给空间设置文字
textView.setText(titles[i]);
//给空间设置字体大小
textView.setTextSize(20);
//界面刚出现,给第一个textview设置颜色
if(i==0){
textView.setTextColor(Color.RED);
}
textView.setId(i);
//初始化一个配置参数
LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
//给参数设置margin值
layoutParams.setMargins(20, 10, 20, 10);
textView.setOnClickListener(this);
//把位置摆放参数设置进去
ll_head.addView(textView,layoutParams);
}
viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public int getCount() {
return titles.length;
}
@Override
public Fragment getItem(int position) {
return Fragment0.newInstance(titles[position]);
}
});
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
//当pager变化的时候设置文字变颜色;
//当点击文字的时候,我们设置了pager改变页面,也会走这个回调,所以点击文字的时候,pager也会跟着翻页
for (int i = 0; i < arrayList.size(); i++) {
arrayList.get(i).setTextColor(Color.BLACK);
if(i==position){
arrayList.get(position).setTextColor(Color.RED);
}
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
/**
* 根据id值来让viewpager滑动到指定的页面;因为id值就是 集合的下标
*/
@Override
public void onClick(View v) {
int id = v.getId();
viewPager.setCurrentItem(id);
}
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