ViewPager里实现监听ViewPager.OnPageChangeListener
MainActivity
1 package viewpagedemo.example.administrator.viewpagedemo;
2
3 import android.graphics.Color;
4 import android.os.Bundle;
5 import android.support.v4.app.Fragment;
6 import android.support.v4.app.FragmentActivity;
7 import android.support.v4.view.PagerTabStrip;
8 import android.support.v4.view.ViewPager;
9 import android.view.View;
10 import android.widget.Toast;
11
12 import java.util.ArrayList;
13 import java.util.List;
14 /*ViewPager实现(界面)导航,eg视图滑动
15 加入ViewPager
16 <android.support.v4.view.ViewPager
17 android:id="@+id/pager"
18 android:layout_width="match_parent"
19 android:layout_height="match_parent"
20 android:layout_gravity="center">
21 </android.support.v4.view.ViewPager>
22
23 加载显示的页卡
24 将Layout布局转换为View对象
25 1/ LayoutInflater if=getLayoutInflater().from(this);
26 if.inflate(resource,root);
27 2/ view.inflate(context,resource,root);
28
29 ViewPager可以看成容器可以装view对象或者Fragment对象
30
31 配置适配器Adapter
32 1/PagerAdapter 数据源:List<View>
33 2/FragmentPagerAdapter 数据源: List<Fragment>
34 3/FragmentStatePagerAdapter 数据源: List<Fragment>*/
35 public class MainActivity extends FragmentActivity implements ViewPager.OnPageChangeListener{
36 private PagerTabStrip tabStrip;
37 private List<Fragment> fragmentList;
38 private List<View>viewList;
39 private ViewPager viewPager;
40
41 private List<String> titleList;
42 private PagerTabStrip pagerTabStrip;
43 @Override
44 protected void onCreate(Bundle savedInstanceState) {
45 super.onCreate(savedInstanceState);
46 setContentView(R.layout.main);
47 /*通过View对象建立ViewPager的数据源*/
48 viewList=new ArrayList<View>();
49 View view1 = View.inflate(this, R.layout.view1, null);
50 View view2 = View.inflate(this, R.layout.view2, null);
51 View view3 = View.inflate(this, R.layout.view3, null);
52 View view4 = View.inflate(this, R.layout.view4, null);
53 viewList.add(view1);
54 viewList.add(view2);
55 viewList.add(view3);
56 viewList.add(view4);
57 /*通过Fragment作为ViewPager的数据源*/
58 fragmentList=new ArrayList<Fragment>();
59
60 fragmentList.add(new Fragment1());
61 fragmentList.add(new Fragment2());
62 fragmentList.add(new Fragment3());
63 fragmentList.add(new Fragment4());
64 titleList=new ArrayList<String>();
65 titleList.add("第一页");
66 titleList.add("第二页");
67 titleList.add("第三页");
68 titleList.add("第四页");
69 tabStrip= (PagerTabStrip) findViewById(R.id.paperTab);
70 tabStrip.setBackgroundColor(Color.RED);/*设置背景颜色*/
71 tabStrip.setTextColor(Color.YELLOW);/*设置文本颜色*/
72 tabStrip.setDrawFullUnderline(false);/*去掉长线*/
73 tabStrip.setTabIndicatorColor(Color.GREEN);/*设置短线颜色*/
74 // 初始化viewPager
75 viewPager= (ViewPager) findViewById(R.id.viewPager);
76 // 创建PagerAdapter的适配器
77 MyPagerAdapt adapt = new MyPagerAdapt(viewList,titleList);
78 // ViewPager加载适配器
79 // viewPager.setAdapter(adapt);
80 // MyFragmentPagerAdapter myFragmentPagerAdapter=new MyFragmentPagerAdapter(getSupportFragmentManager(),fragmentList,titleList);/*support v4中通过getSupportFragmentManager()获取管理者，前提是要把继承Activity改为继承FragmentActivity，*/
81 // viewPager.setAdapter(myFragmentPagerAdapter);
82 MyFragmentStatePagerAdapter myFragmentPagerAdapter1=new MyFragmentStatePagerAdapter(getSupportFragmentManager(),fragmentList,titleList);
83 viewPager.setAdapter(myFragmentPagerAdapter1);
84 viewPager.setOnPageChangeListener(this);
85 }
86
87 @Override
88 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
89
90 }
91
92 @Override
93 public void onPageSelected(int position) {/*常用的方法*/
94 Toast.makeText(this,"第几个页面"+position,Toast.LENGTH_SHORT).show();
95 }
96
97 @Override
98 public void onPageScrollStateChanged(int state) {
99
100 }
101 }
MyFragmentStatePagerAdapter
1 package viewpagedemo.example.administrator.viewpagedemo;
2
3 import android.support.v4.app.Fragment;
4 import android.support.v4.app.FragmentManager;
5 import android.support.v4.app.FragmentPagerAdapter;
6 import android.support.v4.app.FragmentStatePagerAdapter;
7 import android.util.Log;
8 import android.view.View;
9 import android.view.ViewGroup;
10
11 import java.util.List;
12
13 /**
14 * Created by Administrator on 2016/5/8.
15 */
16 public class MyFragmentStatePagerAdapter extends FragmentStatePagerAdapter{
17 private List<Fragment>fragmentList;
18 private List<String>titleList;
19 public MyFragmentStatePagerAdapter(FragmentManager fm, List<Fragment>fragmentList, List<String>titleList) {
20 super(fm);
21 this.fragmentList=fragmentList;
22 this.titleList=titleList;
23 }
24
25 @Override
26 public Fragment getItem(int position) {
27 return fragmentList.get(position);
28 }
29
30 @Override
31 public int getCount() {
32 return fragmentList.size();
33 }
34
35 @Override
36 public CharSequence getPageTitle(int position) {
37 return titleList.get(position);
38 }
39
40
41 @Override
42 public Object instantiateItem(ViewGroup container, int position) {
43 return super.instantiateItem(container, position);
44 }
45
46 @Override
47 public void destroyItem(ViewGroup container, int position, Object object) {
48 super.destroyItem(container, position, object);
49 Log.i("nihao","nihao");
50 }
51 }
MyFragPagerAdapter
1 package viewpagedemo.example.administrator.viewpagedemo;
2
3 import android.support.v4.app.Fragment;
4 import android.support.v4.app.FragmentManager;
5 import android.support.v4.app.FragmentPagerAdapter;
6
7 import java.util.List;
8
9 /**
10 * Created by Administrator on 2016/5/8.
11 */
12 public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
13 private List<Fragment>fragmentList;
14 private List<String>titleList;
15 public MyFragmentPagerAdapter(FragmentManager fm,List<Fragment>fragmentList,List<String>titleList) {
16 super(fm);
17 this.fragmentList=fragmentList;
18 this.titleList=titleList;
19 }
20
21 @Override
22 public Fragment getItem(int position) {
23 return fragmentList.get(position);
24 }
25
26 @Override
27 public int getCount() {
28 return fragmentList.size();
29 }
30
31 @Override
32 public CharSequence getPageTitle(int position) {
33 return titleList.get(position);
34 }
35 }
时间： 2024-10-14 13:58:19