这篇文章主要介绍“Android中怎么使用viewpager滑动指示器”，在日常操作中，相信很多人在Android中怎么使用viewpager滑动指示器问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”Android中怎么使用viewpager滑动指示器”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
工程目录：
1. MainActivity.java
public class MainActivity extends FragmentActivity {
private ViewPagerFrameAdapter adapter; //适配器（标题和内容）
private ViewPager mPager;
private TabPageIndicator tabbPageIndicator; //
private UnderlinePageIndicatorEx underlinePageIndicator;
private int COUNT = 0;
private List titles = new ArrayList(); //标题
@Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
//标题，这里自己造的假数据
for (int j = 0; j < 3 ; j++){
titles.add( "第"+ j +"标签卡");
}
mPager = (ViewPager)findViewById(R.id.pager);
adapter = new ViewPagerFrameAdapter(getSupportFragmentManager(),titles);
mPager.setAdapter(adapter);
//得到指示器
tabbPageIndicator = (TabPageIndicator) findViewById(R.id.tab_indicator);
tabbPageIndicator.setViewPager(mPager);
//下标
underlinePageIndicator = (UnderlinePageIndicatorEx)findViewById(R.id.underline_indicator);
underlinePageIndicator.setViewPager(mPager);
underlinePageIndicator.setFades(false);
//设置指示器
tabbPageIndicator.setOnPageChangeListener(underlinePageIndicator);
}
//adapter 没啥好说的 跟前面的一样
private class ViewPagerFrameAdapter extends FragmentStatePagerAdapter{
private List title; //页面标题头部数据
public ViewPagerFrameAdapter(FragmentManager fm, List title) {
super(fm);
this.title = title;
}
//根据position 返回 fragment
@Override
public Fragment getItem(int position) {
return ArrayFragment.newInstance(position);
}
//size
@Override
public int getCount() {
return title.size();
}
//顶部的title
@Override
public CharSequence getPageTitle(int position) {
if (titles != null){
return titles.get(position).toString();
}
return super.getPageTitle(position);
}
}
} UnderlinePageIndicatorEx.java
//继承这个然后重写
public class UnderlinePageIndicatorEx extends UnderlinePageIndicator{
public UnderlinePageIndicatorEx(Context context) {
super(context, null);
}
public UnderlinePageIndicatorEx(Context context, AttributeSet attrs) {
super(context, attrs, R.attr.vpiUnderlinePageIndicatorStyle);
}
public UnderlinePageIndicatorEx(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
//自身的 ViewPage传递过去
@Override
public void setViewPager(ViewPager viewPager) {
if (mViewPager == viewPager){
return;
}
// if (mViewPager != null) {
// mViewPager.setOnPageChangeListener(null);
// }
if (viewPager.getAdapter() == null) {
throw new IllegalStateException(" pager 没有 加入 adapter");
}
mViewPager = viewPager;
// mViewPager.setOnPageChangeListener(this);
invalidate();
post(new Runnable(){
@Override public void run() {
if (mFades) {
post(mFadeRunnable);
}
}
});
}
}ArrayFragment.java
public class ArrayFragment extends Fragment{
private int position;
public ArrayFragment(int position){
this.position = position;
}
// 返回 viwePager 下面滑动的页面
public static ArrayFragment newInstance(int position){
return new ArrayFragment(position);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onDestroy() {
super.onDestroy();
}
// 根据position 返回不同的view
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layoutaa, null);
return view;
}
}好了接下来是 布局xml了。
