应用引导页是现今App的必需品，通过引导页可以第一时间知道此款软件的特色，如何使用。并且能了解到最新的动态和更新。
第一页，Logo页面或者欢迎页面，判断是否需要进入引导页。
1 package com.zhang.viewpagerdemo;
2
3 import android.app.Activity;
4 import android.content.Intent;
5 import android.content.SharedPreferences;
6 import android.os.Bundle;
7 import android.os.Handler;
8 import android.os.Message;
9
10 public class WelcomeAct extends Activity {
11
12 private boolean isFirstIn = false;
13 private static final int TIME = 2000;
14 private static final int GO_HOME = 1000;
15 private static final int GO_GUIDE = 1001;
16
17 private Handler handler = new Handler() {
18
19 @Override
20 public void handleMessage(Message msg) {
21 super.handleMessage(msg);
22
23 switch (msg.what) {
24 case GO_HOME:
25 goHome();
26 break;
27 case GO_GUIDE:
28 goGuide();
29 break;
30 }
31 }
32 };
33
34 @Override
35 protected void onCreate(Bundle savedInstanceState) {
36 super.onCreate(savedInstanceState);
37 setContentView(R.layout.welcome);
38
39 init();
40 }
41
42 private void init() {
43 SharedPreferences preferences = getSharedPreferences("myWelcome", MODE_PRIVATE);
44 isFirstIn = preferences.getBoolean("isFirstIn", true);
45 if (!isFirstIn) {
46 handler.sendEmptyMessageDelayed(GO_HOME, TIME);
47 } else {
48 handler.sendEmptyMessageDelayed(GO_GUIDE, TIME);
49 SharedPreferences.Editor editor = preferences.edit();
50 editor.putBoolean("isFirstIn", false);
51 editor.apply();
52 }
53 }
54
55 private void goHome() {
56 Intent i = new Intent(WelcomeAct.this, MainActivity.class);
57 startActivity(i);
58 finish();
59 }
60
61 private void goGuide() {
62 Intent i = new Intent(WelcomeAct.this, Guide.class);
63 startActivity(i);
64 finish();
65 }
66 }
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="match_parent" 5 android:layout_height="match_parent" 6 android:orientation="vertical" 7 tools:context="com.zhang.viewpagerdemo.WelcomeAct"> 8 9 <ImageView 10 android:layout_width="match_parent" 11 android:layout_height="match_parent" 12 android:background="@drawable/welcome_android" /> 13 14 </LinearLayout>
引导页面：
1 package com.zhang.viewpagerdemo;
2
3 import android.app.Activity;
4 import android.content.Intent;
5 import android.os.Bundle;
6 import android.support.v4.view.ViewPager;
7 import android.view.LayoutInflater;
8 import android.view.View;
9 import android.widget.Button;
10 import android.widget.ImageView;
11
12 import java.util.ArrayList;
13 import java.util.List;
14
15 /**
16 * Created by Mr.Z on 2016/5/22 0022.
17 */
18 public class Guide extends Activity implements ViewPager.OnPageChangeListener {
19
20 private ViewPager vp;
21 private ViewPagerAdapter vpAdapter;
22 private List<View> views;
23 private ImageView[] dots;
24 private int[] ids = {R.id.iv1, R.id.iv2, R.id.iv3};
25 private Button btnStart;
26
27 @Override
28 protected void onCreate(Bundle savedInstanceState) {
29 super.onCreate(savedInstanceState);
30 setContentView(R.layout.guide);
31
32 initViews();
33
34 initDots();
35 }
36
37 private void initViews() {
38
39 LayoutInflater inflater = LayoutInflater.from(this);
40
41 views = new ArrayList<>();
42 views.add(inflater.inflate(R.layout.one, null));
43 views.add(inflater.inflate(R.layout.two, null));
44 views.add(inflater.inflate(R.layout.three, null));
45
46 vpAdapter = new ViewPagerAdapter(views, this);
47
48 btnStart = (Button) views.get(2).findViewById(R.id.start_btn);
49
50 vp = (ViewPager) findViewById(R.id.viewpager);
51 vp.setAdapter(vpAdapter);
52 vp.setOnPageChangeListener(this);
53
54 btnStart.setOnClickListener(new View.OnClickListener() {
55 @Override
56 public void onClick(View v) {
57 Intent i = new Intent(Guide.this,MainActivity.class);
58 startActivity(i);
59 finish();
60 }
61 });
62
63 }
64
65 private void initDots() {
66 dots = new ImageView[views.size()];
67 for (int i = 0; i < views.size(); i++) {
68 dots[i] = (ImageView) findViewById(ids[i]);
69 }
70 }
71
72 @Override
73 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
74
75 }
76
77 @Override
78 public void onPageSelected(int position) {
79
80 }
81
82 @Override
83 public void onPageScrollStateChanged(int state) {
84 for (int i = 0; i < ids.length; i++) {
85 if (state == i) {
86 dots[i].setImageResource(R.drawable.login_point_selected);
87 } else {
88 dots[i].setImageResource(R.drawable.login_point);
89 }
90 }
91 }
92 }
1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent"> 5 6 <android.support.v4.view.ViewPager 7 android:id="@+id/viewpager" 8 android:layout_width="match_parent" 9 android:layout_height="match_parent" 10 android:background="@android:color/black" 11 android:flipInterval="30" 12 android:persistentDrawingCache="animation" /> 13 14 <LinearLayout 15 android:layout_width="match_parent" 16 android:layout_height="wrap_content" 17 android:layout_alignParentBottom="true" 18 android:gravity="center_horizontal" 19 android:orientation="horizontal"> 20 21 <ImageView 22 android:id="@+id/iv1" 23 android:layout_width="wrap_content" 24 android:layout_height="wrap_content" 25 android:src="@drawable/login_point" /> 26 <ImageView 27 android:id="@+id/iv2" 28 android:layout_width="wrap_content" 29 android:layout_height="wrap_content" 30 android:src="@drawable/login_point" /> 31 <ImageView 32 android:id="@+id/iv3" 33 android:layout_width="wrap_content" 34 android:layout_height="wrap_content" 35 android:src="@drawable/login_point" /> 36 </LinearLayout> 37 38 </RelativeLayout>
1 package com.zhang.viewpagerdemo;
2
3 import android.content.Context;
4 import android.support.v4.view.PagerAdapter;
5 import android.support.v4.view.ViewPager;
6 import android.view.View;
7
8 import java.util.List;
9
10 /**
11 * Created by Mr.Z on 2016/5/22 0022.
12 */
13 public class ViewPagerAdapter extends PagerAdapter {
14
15 private List<View> views;
16 private Context context;
17
18 public ViewPagerAdapter(List<View> views, Context context) {
19 this.views = views;
20 this.context = context;
21 }
22
23 @Override
24 public void destroyItem(View container, int position, Object object) {
25 ((ViewPager) container).removeView(views.get(position));
26 }
27
28 @Override
29 public Object instantiateItem(View container, int position) {
30
31 ((ViewPager) container).addView(views.get(position));
32
33 return views.get(position);
34 }
35
36 @Override
37 public int getCount() {
38 return views.size();
39 }
40
41 @Override
42 public boolean isViewFromObject(View view, Object object) {
43 return (view == object);
44 }
45 }
主页面：
1 package com.zhang.viewpagerdemo;
2
3 import android.support.v7.app.AppCompatActivity;
4 import android.os.Bundle;
5
6 public class MainActivity extends AppCompatActivity {
7
8 @Override
9 protected void onCreate(Bundle savedInstanceState) {
10 super.onCreate(savedInstanceState);
11 setContentView(R.layout.activity_main);
12 }
13 }
时间： 2024-10-29 08:22:34