1，示例
2，代码
SplashMain.java
1 import android.os.Bundle;
2 import android.support.v4.app.Fragment;
3 import android.support.v4.view.ViewPager;
4 import android.view.LayoutInflater;
5 import android.view.View;
6 import android.view.ViewGroup;
7 import android.widget.LinearLayout;
8
9 import com.txw.e.viewpager.R;
10 import com.txw.e.viewpager.main.MainActivity;
11
12 /**
13 * A simple {@link Fragment} subclass.
14 */
15 public class SplashMain extends Fragment {
16
17
18 //1，在layout.xml中添加 ViewPagerFragment,它可以是顶级布局，如下：
19 /*
20 <?xml version="1.0" encoding="utf-8"?>
21 <android.support.v4.view.ViewPager
22 android:id="@+id/splash_pager"
23 xmlns:android="http://schemas.android.com/apk/res/android"
24 android:layout_width="match_parent"
25 android:layout_height="match_parent"/>
26 */
27
28 //2，准备变量,ViewPager和 PagerAdapter ,OnPageChangeListener
29 ViewPager pager;
30 SplashViewPagerAdapter pagerAdapter;
31
32 //3，初始化pager
33 void initPager(View v){
34 //从layout.xml中初始化pager
35 pager =
(ViewPager) v.findViewById(R.id.splash_pager);
36
37 //初始化page adapter
38 pagerAdapter =
new SplashViewPagerAdapter(getFragmentManager());
39
40 //设置adapter
41 pager.setAdapter(pagerAdapter);
42
43 //设置page切换监听者
44 pager.addOnPageChangeListener(onPageChangeListener);
45
46 //设置pager切换动画
47 // pager.setPageTransformer(true, new DepthPageTransformer());
48
49
50 }
51
52 //4，处理 pager 切换事件
53 //这里用的ViewPager.SimpleOnPageChangeListener,它什么也不做。
54 ViewPager.OnPageChangeListener onPageChangeListener =
new ViewPager.OnPageChangeListener() {
55 @Override
56 public void onPageScrolled(
int position,
float positionOffset,
int positionOffsetPixels) {
57 if (positionOffset ==
0){
58 for (
int i =
0; i < indexer.getChildCount(); ++
i){
59 View v =
indexer.getChildAt(i);
60 if (i ==
position){
61 v.setBackgroundResource(R.drawable.splash_indexer_focused);
62 }
else{
63 v.setBackgroundResource(R.drawable.splash_indexer);
64 }
65 }
66 }
67 }
68
69 @Override
70 public void onPageSelected(
int position) {
71
72 }
73
74 @Override
75 public void onPageScrollStateChanged(
int state) {
76
77 }
78 };
79
80 //5，重写切换动画类，可以把这个类放到外面去。
81 public class DepthPageTransformer implements ViewPager.PageTransformer {
82 private static final
float MIN_SCALE =
0.75f;
83
84 public void transformPage(View view,
float position) {
85 int pageWidth =
view.getWidth();
86
87 if (position < -
1) {
// [-Infinity,-1)
88 // This page is way off-screen to the left.
89 view.setAlpha(
0);
90
91 }
else if (position <=
0) {
// [-1,0]
92 // Use the default slide transition when moving to the left page
93 view.setAlpha(
1);
94 view.setTranslationX(
0);
95 view.setScaleX(
1);
96 view.setScaleY(
1);
97
98 }
else if (position <=
1) {
// (0,1]
99 // Fade the page out.
100 view.setAlpha(
1 -
position);
101
102 // Counteract the default slide transition
103 view.setTranslationX(pageWidth * -
position);
104
105 // Scale the page down (between MIN_SCALE and 1)
106 float scaleFactor =
MIN_SCALE
107 + (
1 - MIN_SCALE) * (
1 -
Math.abs(position));
108 view.setScaleX(scaleFactor);
109 view.setScaleY(scaleFactor);
110
111 }
else {
// (1,+Infinity]
112 // This page is way off-screen to the right.
113 view.setAlpha(
0);
114 }
115 }
116 }
117
118
119 LinearLayout indexer;
120
121
122 @Override
123 public View onCreateView(LayoutInflater inflater, ViewGroup container,
124 Bundle savedInstanceState) {
125 // Inflate the layout for this fragment
126 View v = inflater.inflate(R.layout.fragment_splash_main, container,
false);
127
128 initPager(v);
129
130 indexer =
(LinearLayout) v.findViewById(R.id.splash_indexer);
131
132 return v;
133 }
134
135 @Override
136 public void onCreate(Bundle savedInstanceState) {
137 super.onCreate(savedInstanceState);
138 MainActivity aty =
(MainActivity) getActivity();
139 aty.getSupportActionBar().hide();
140 }
141
142 @Override
143 public void onDestroy() {
144 super.onDestroy();
145 MainActivity aty =
(MainActivity) getActivity();
146 aty.getSupportActionBar().show();
147 }
148 }
SplashViewPagerAdapter.java
1 import android.support.v4.app.Fragment;
2 import android.support.v4.app.FragmentManager;
3 import android.support.v4.app.FragmentStatePagerAdapter;
4
5 public class SplashViewPagerAdapter extends FragmentStatePagerAdapter {
6
7
8 public SplashViewPagerAdapter(FragmentManager fm) {
9 super(fm);
10
11 }
12
13 @Override
14 public Fragment getItem(
int position) {
15 SplashFragment fragment =
new SplashFragment();
16 fragment.colorId =
position;
17 return fragment;
18 }
19
20 @Override
21 public int getCount() {
22 return 4;
23 }
24 }
SplashFragment.java
1 public class SplashFragment extends Fragment {
2
3
4 public int colors[] =
{Color.BLUE,Color.CYAN,Color.GREEN,Color.MAGENTA};
5
6 public View rootView;
7 public int colorId;
8
9 View.OnClickListener clickListener =
new View.OnClickListener(){
10
11 @Override
12 public void onClick(View v) {
13 if (colorId ==
3){
14 getFragmentManager().popBackStack();
15 }
16 }
17 };
18
19 @Override
20 public View onCreateView(LayoutInflater inflater, ViewGroup container,
21 Bundle savedInstanceState) {
22 // Inflate the layout for this fragment
23 rootView = inflater.inflate(R.layout.fragment_splash, container,
false);
24
25 rootView.setBackgroundColor(colors[colorId]);
26
27 rootView.setOnClickListener(clickListener);
28
29 return rootView;
30 }
31
32 }
3，xml
fragment_splash_main.xml
1 <?xml version="1.0" encoding="utf-8"?>
2
3 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
4 android:layout_width="match_parent"
5 android:layout_height="match_parent"
6 android:background="#FFFFFF">
7
8 <android.support.v4.view.ViewPager
9 android:id="@+id/splash_pager"
10 android:layout_width="match_parent"
11 android:layout_height="match_parent"/>
12
13 <LinearLayout
14 android:id="@+id/splash_indexer"
15 android:layout_width="wrap_content"
16 android:layout_height="wrap_content"
17 android:layout_gravity="bottom|center_horizontal"
18 android:layout_marginBottom="30dp"
19 android:orientation="horizontal">
20
21 <TextView
22 android:layout_width="wrap_content"
23 android:layout_height="match_parent"
24 android:layout_gravity="center_horizontal"
25 android:background="@drawable/splash_indexer"/>
26
27 <TextView
28 android:layout_width="wrap_content"
29 android:layout_height="match_parent"
30 android:layout_gravity="center_horizontal"
31 android:background="@drawable/splash_indexer"/>
32
33 <TextView
34 android:layout_width="wrap_content"
35 android:layout_height="match_parent"
36 android:layout_gravity="center_horizontal"
37 android:background="@drawable/splash_indexer"/>
38
39 <TextView
40 android:layout_width="wrap_content"
41 android:layout_height="match_parent"
42 android:layout_gravity="center_horizontal"
43 android:background="@drawable/splash_indexer"/>
44 </LinearLayout>
45
46 </FrameLayout>
fragment_splash.xml
1 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
2 xmlns:tools="http://schemas.android.com/tools"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:background="#FFFFFF"
6 tools:context="com.txw.e.viewpager.splash.SplashFragment">
7 </FrameLayout>
drawable/splash_indexer_focused.xml
1 <?xml version="1.0" encoding="utf-8"?>
2 <shape xmlns:android="http://schemas.android.com/apk/res/android"
3 android:shape="oval">
4 <!--<gradient-->
5 <!--android:endColor="#f793ac"-->
6 <!--android:gradientRadius="50"-->
7 <!--android:startColor="#fa1621"-->
8 <!--android:type="radial"/>-->
9
10 <solid android:color="#FFFFFF" />
11 <size android:width="20dp" android:height="20dp"/>
12
13 </shape>
drawable/splash_indexer.xml
1 <?xml version="1.0" encoding="utf-8"?>
2 <shape xmlns:android="http://schemas.android.com/apk/res/android"
3 android:shape="oval">
4 <gradient
5 android:endColor="#fa1621"
6 android:gradientRadius="50"
7 android:startColor="#f793ac"
8 android:type="radial"/>
9 <size
10 android:width="20dp"
11 android:height="20dp"/>
12
13 </shape>
转载于:https://www.cnblogs.com/sjjg/p/5512811.html
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