android – 处理PagerTitleStrip点击兼容基于片段的ViewPager

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我有一个兼容性 ViewPager与嵌入式 PagerTitleStrip元素,它工作正常,但点击PagerTitleStrip不要按预期切换到相应的视图.我已经查看了文档,但是该widget没有任何内置的方法来附加onClickListeners到PagerTitleStrip对象.这似乎有点奇怪,因为这可能是大多数人会期望的.

所以问题是如何使标题栏可点击?

我也试图找出是否有办法在选定的标题栏下显示一个粗调的下划线,而无需添加一个TabHost,如果可能的话.

这是代码

主要布局view_pager.xml:

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3. xmlns:tools="http://schemas.android.com/tools"
  4. android:layout_width="fill_parent"
  5. android:layout_height="fill_parent"
  6. android:orientation="vertical" >
  7.  
  8. <android.support.v4.view.ViewPager
  9. xmlns:android="http://schemas.android.com/apk/res/android"
  10. android:id="@+id/my_view_pager"
  11. android:layout_width="match_parent"
  12. android:layout_height="match_parent" >
  13.  
  14. <android.support.v4.view.PagerTitleStrip
  15. android:id="@+id/pager_title_strip"
  16. android:layout_width="match_parent"
  17. android:layout_height="wrap_content"
  18. android:layout_gravity="top"
  19. android:background="#ccc"
  20. android:textColor="#fff" />
  21. </android.support.v4.view.ViewPager>
  22.  
  23. </LinearLayout>

进入ViewPager的两个片段布局:

fragment_connect.xml(第二个是相同的,所以不包括)

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3. android:layout_width="fill_parent"
  4. android:layout_height="fill_parent"
  5. android:orientation="vertical" >
  6.  
  7. <TextView
  8. android:id="@+id/text_view_connect"
  9. android:layout_width="wrap_content"
  10. android:layout_height="wrap_content"
  11. android:text="connect"
  12. android:textAppearance="?android:attr/textAppearanceLarge" />
  13. </LinearLayout>

主要活动类StandardViewPagerActivity.java:

  1. package com.example.standardviewpager;
  2.  
  3. import java.util.List;
  4. import java.util.Vector;
  5.  
  6. import android.os.Bundle;
  7. import android.support.v4.app.Fragment;
  8. import android.support.v4.app.FragmentActivity;
  9. import android.support.v4.view.PagerTitleStrip;
  10. import android.support.v4.view.ViewPager;
  11. import android.view.Menu;
  12.  
  13. public class StandardViewPagerActivity extends FragmentActivity {
  14.  
  15. private MyPagerAdapter pagerAdapter;
  16.  
  17. @Override
  18. public void onCreate(Bundle savedInstanceState) {
  19. super.onCreate(savedInstanceState);
  20. setContentView(R.layout.view_pager);
  21. ViewPager myPager = (ViewPager) findViewById(R.id.my_view_pager);
  22. PagerTitleStrip pagerStrip = (PagerTitleStrip) findViewById(R.id.pager_title_strip);
  23. // TODO: add underline for selected title strip
  24. myPager.setAdapter(pagerAdapter);
  25. myPager.setCurrentItem(0);
  26. initialisePaging();
  27. }
  28.  
  29. private void initialisePaging() {
  30.  
  31. List<Fragment> fragments = new Vector<Fragment>();
  32. fragments.add(Fragment.instantiate(this,ConnectFragment.class.getName()));
  33. fragments.add(Fragment.instantiate(this,ProfilesFragment.class.getName()));
  34. this.pagerAdapter = new MyPagerAdapter(super.getSupportFragmentManager(),fragments);
  35. ViewPager pager = (ViewPager) super.findViewById(R.id.my_view_pager);
  36. pager.setAdapter(this.pagerAdapter);
  37. }
  38. }

适配器类MyPagerAdapter.java:

  1. package com.example.standardviewpager;
  2.  
  3. import java.util.List;
  4.  
  5. import android.os.Parcelable;
  6. import android.support.v4.app.Fragment;
  7. import android.support.v4.app.FragmentManager;
  8. import android.support.v4.app.FragmentPagerAdapter;
  9. import android.support.v4.view.ViewPager;
  10. import android.view.LayoutInflater;
  11. import android.view.View;
  12.  
  13. public class MyPagerAdapter extends FragmentPagerAdapter {
  14.  
  15. private List<Fragment> fragments;
  16.  
  17. public MyPagerAdapter(FragmentManager supportFragmentManager,List<Fragment> fragments) {
  18. super(supportFragmentManager);
  19. this.fragments = fragments;
  20. }
  21.  
  22. @Override
  23. public int getCount() {
  24. return this.fragments.size();
  25. }
  26.  
  27. @Override
  28. public void destroyItem(View arg0,int arg1,Object arg2) {
  29. ((ViewPager) arg0).removeView((View) arg2);
  30. }
  31.  
  32. @Override
  33. public Parcelable saveState() {
  34. return null;
  35. }
  36.  
  37. @Override
  38. public CharSequence getPageTitle(int position) {
  39. return String.format("Title %d",position);
  40. }
  41.  
  42. @Override
  43. public Fragment getItem(int position) {
  44. return this.fragments.get(position);
  45. }
  46. }

最后,两个相同的Fragment实现,只包括第一个ConnectFragment.java.

  1. package com.example.standardviewpager;
  2.  
  3. import android.os.Bundle;
  4. import android.support.v4.app.Fragment;
  5. import android.view.LayoutInflater;
  6. import android.view.View;
  7. import android.view.ViewGroup;
  8. import android.widget.LinearLayout;
  9. import android.widget.TextView;
  10.  
  11. public class ConnectFragment extends Fragment {
  12.  
  13. @Override
  14. public void onCreate(Bundle savedInstanceState) {
  15. super.onCreate(savedInstanceState);
  16. }
  17.  
  18. @Override
  19. public void onActivityCreated(Bundle savedInstanceState) {
  20. super.onActivityCreated(savedInstanceState);
  21. }
  22.  
  23. @Override
  24. public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
  25. LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.fragment_connect,container,false);
  26. TextView textView = (TextView) layout.findViewById(R.id.text_view_connect);
  27. textView.setText("onCreateView() Connect");
  28. return (View)layout;
  29. }
  30. }

解决方法

So the question is how would I make the title strip clickable?

你分叉它,并使您可以点击的自己的实现.或者,您切换到可以点击的PagerTabStrip.或者,您切换到ViewPagerIndicator指标之一,恰好是可点击的,并且看起来像您喜欢的.

报价the documentation for PagerTitleStrip

PagerTitleStrip is a non-interactive indicator of the current,next,and prevIoUs pages of a ViewPager… For an interactive indicator,see PagerTabStrip.

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