引导页（handler 以及底部小圆点）第二篇 

  1 package com.example.viewpager;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 import android.support.v4.view.PagerAdapter;
  7 import android.support.v4.view.ViewPager;
  8 import android.support.v4.view.ViewPager.OnPageChangeListener;
  9 import android.support.v7.app.ActionBarActivity;
 10 import android.app.Activity;
 11 import android.content.Intent;
 12 import android.os.Bundle;
 13 import android.view.LayoutInflater;
 14 import android.view.Menu;
 15 import android.view.MenuItem;
 16 import android.view.View;
 17 import android.view.View.OnClickListener;
 18 import android.view.ViewGroup;
 19 import android.widget.ImageView;
 20 import android.widget.LinearLayout;
 21 import android.widget.LinearLayout.LayoutParams;
 22 import android.widget.TextView;
 23 
 24 public class MainActivity extends Activity implements OnPageChangeListener{
 25 
 26     ViewPager v;// viewpager 控件
 27     List<View> img;// drawable （数据）包含的图片
 28     LinearLayout liner;
 29     TextView text;
 30 
 31     @Override
 32     protected void onCreate(Bundle savedInstanceState) {
 33         super.onCreate(savedInstanceState);
 34         setContentView(R.layout.activity_main);
 35         v = (ViewPager) findViewById(R.id.view);
 36         text = (TextView) findViewById(R.id.guideTv);
 37         liner = (LinearLayout) findViewById(R.id.li);
 38         img = new ArrayList<View>();
 39         // 得到三张图片
 40         LayoutInflater in = getLayoutInflater();
 41         View v1 = in.inflate(R.layout.one, null);
 42         v1.setBackgroundResource(R.drawable.aa1);
 43         View v2 = in.inflate(R.layout.one, null);
 44         v2.setBackgroundResource(R.drawable.aa2);
 45         View v3 = in.inflate(R.layout.one, null);
 46         v3.setBackgroundResource(R.drawable.aa3);
 47         // 将view中的图片添加到数组里
 48         img.add(v3);
 49         img.add(v2);
 50         img.add(v1);
 51         // 得到适配器
 52         myAdapter adapter = new myAdapter();
 53         // 使适配器与viewpager相连
 54         v.setAdapter(adapter);
 55         v.setOnPageChangeListener(this);
 56         addPoints();
 57         text.setOnClickListener(new OnClickListener() {
 58             
 59             @Override
 60             public void onClick(View v) {
 61 
 62                 Intent intent=new Intent(MainActivity.this,TwoActivity.class);
 63                 startActivity(intent);
 64                 
 65             }
 66         });
 67     }
 68 
 69     class myAdapter extends PagerAdapter {
 70 
 71         @Override
 72         public int getCount() {
 73             // TODO Auto-generated method stub
 74             return img.size();// 子页的数量
 75         }
 76 
 77         @Override
 78         public boolean isViewFromObject(View arg0, Object arg1) {
 79             // TODO Auto-generated method stub
 80             return arg0 == arg1;// 这个地方有点模糊建议看源代码 令 view对象与object对象相等
 81         }
 82 
 83         @Override
 84         public void destroyItem(ViewGroup container, int position, Object object) {
 85             container.removeView(img.get(position));// 动态的移除view
 86         }
 87 
 88         @Override
 89         public Object instantiateItem(ViewGroup container, int position) {
 90             container.addView(img.get(position));
 91             return img.get(position);// 动态的添加view
 92         }
 93 
 94     }
 95 
 96     // 添加小圆点
 97     private void addPoints() {
 98         // 1.根据图片多少，添加多少小圆点
 99         for (int i = 0; i < img.size(); i++) {
100             LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
101                     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
102             if (i < 1) {
103                 param.setMargins(0, 0, 0, 0);
104             } else {
105                 param.setMargins(10, 0, 0, 0);
106 
107             }
108             ImageView iv = new ImageView(this);
109             iv.setLayoutParams(param);
110             iv.setBackgroundResource(R.drawable.page_indicator_unfocused);
111             liner.addView(iv);
112         }
113         liner.getChildAt(0).setBackgroundResource(
114                 R.drawable.page_indicator_focused);
115 
116     }
117 
118     // 判断选中小圆点
119     private void monitorPoint(int Position) {
120         for (int i = 0; i < img.size(); i++) {
121             if (i == Position) {
122                 liner.getChildAt(Position).setBackgroundResource(
123                         R.drawable.page_indicator_focused);
124 
125             } else {
126                 liner.getChildAt(i).setBackgroundResource(
127                         R.drawable.page_indicator_unfocused);
128 
129             }
130 
131         }
132         // 当滑动到最后一个添加按钮点击进去
133         if (Position == img.size() - 1) {
134             text.setVisibility(View.VISIBLE);
135         } else {
136             text.setVisibility(View.GONE);
137         }
138 
139     }
140 
141     // 当滑动状态改变时调用
142     @Override
143     public void onPageScrollStateChanged(int arg0) {
144     }
145 
146     // 当当前页面被滑动时调用
147     @Override
148     public void onPageScrolled(int arg0, float arg1, int arg2) {
149     }
150 
151     // 当新的页面被选中时调用
152     @Override
153     public void onPageSelected(int arg0) {
154         // 设置底部小点选中状态
155         monitorPoint(arg0);
156     }
157     
158 }

相应的activity文件

 1 package com.example.viewpager;
 2 
 3 import java.util.Timer;
 4 import java.util.TimerTask;
 5 
 6 import android.app.Activity;
 7 import android.content.Intent;
 8 import android.content.SharedPreferences;
 9 import android.os.Bundle;
10 import android.widget.ImageView;
11 
12 public class FristActivity extends Activity {
13     ImageView img;
14     SharedPreferences share;
15 
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.frist);
20         img = (ImageView) findViewById(R.id.img);

21         share = getSharedPreferences("aa", MODE_PRIVATE);
22         int number = share.getInt("bb", 1);
23         if (number == 1) {
24             share.edit().putInt("bb", 2).commit();// 将2编辑入share并提交
25             Timer timer = new Timer();
26             TimerTask task = new TimerTask() {
27 
28                 @Override
29                 public void run() {
30                     Intent intent = new Intent(FristActivity.this,
31                             MainActivity.class);
32                     startActivity(intent);
33                     finish();
34 
35                 }
36             };
37             timer.schedule(task, 3000);
38         } else {
39 
40             Timer timer = new Timer();
41             TimerTask task = new TimerTask() {
42 
43                 @Override
44                 public void run() {
45                     Intent intent = new Intent(FristActivity.this,
46                             TwoActivity.class);
47                     startActivity(intent);
48                     finish();
49 
50                 }
51             };
52             timer.schedule(task, 3000);
53         }
54     }
55 
56 }

相应的xml文件

 1 <RelativeLayout 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     >
 6 <android.support.v4.view.ViewPager
 7     android:layout_width="match_parent"
 8     android:layout_height="match_parent"
 9     android:id="@+id/view"/>
10 <LinearLayout 
11     android:layout_width="match_parent"
12     android:layout_height="wrap_content"
13     android:id="@+id/li"
14     android:layout_alignParentBottom="true"
15     android:layout_marginBottom="20dp"
16     android:gravity="center_horizontal"
17     android:orientation="horizontal"></LinearLayout>
18    <TextView   
19         android:id="@+id/guideTv"  
20         android:layout_width="130dp"  
21         android:layout_height="40dp"  
22         android:text="立即体验"  
23         android:textColor="#ffffff"  
24         android:background="#88000000"  
25         android:textSize="14sp"  
26         android:gravity="center"  
27         android:layout_above="@id/li"  
28         android:layout_centerHorizontal="true"  
29         android:layout_marginBottom="20dp"  
30         android:visibility="gone"  
31         />  
32 </RelativeLayout>

timer线程使用 sharedpreference存储

第一步 得到sharedpreference

SharedPreferences share = getSharedPreferences("aa", MODE_PRIVATE);

第二步：判断是否是第一次下载并用线程计时

 1 int number = share.getInt("bb", 1);
 2         if (number == 1) {
 3             share.edit().putInt("bb", 2).commit();// 将2编辑入share并提交
 4             Timer timer = new Timer();
 5             TimerTask task = new TimerTask() {
 6 
 7                 @Override
 8                 public void run() {
 9                     Intent intent = new Intent(FristActivity.this,
10                             MainActivity.class);
11                     startActivity(intent);
12                     finish();
13 
14                 }
15             };
16             timer.schedule(task, 3000);
17         } else {
18 
19             Timer timer = new Timer();
20             TimerTask task = new TimerTask() {
21 
22                 @Override
23                 public void run() {
24                     Intent intent = new Intent(FristActivity.this,
25                             TwoActivity.class);
26                     startActivity(intent);
27                     finish();
28 
29                 }
30             };
31             timer.schedule(task, 3000);//跳转时间
32         }

 

底部小圆点步骤

1.将小圆点添加到数组里

private void addPoints() {
		// 1.根据图片多少，添加多少小圆点
		for (int i = 0; i < img.size(); i++) {
			LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(  
					LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);//设置子布局的宽高
			if (i < 1) {
				param.setMargins(0, 0, 0, 0);//设置子布局之间的距离
			} else {
				param.setMargins(10, 0, 0, 0);

			}
//将imageview写入父布局里
			ImageView iv = new ImageView(this);
			iv.setLayoutParams(param);
			iv.setBackgroundResource(R.drawable.page_indicator_unfocused);
			liner.addView(iv);//将子布局添加到父布局里


} 
liner.getChildAt(0).setBackgroundResource( R.drawable.page_indicator_focused); }




2.判断选中小圆点




 1 private void monitorPoint(int Position) {
 2         for (int i = 0; i < img.size(); i++) {
 3             if (i == Position) {
 4                 liner.getChildAt(Position).setBackgroundResource(
 5                         R.drawable.page_indicator_focused);
 6 
 7             } else {
 8                 liner.getChildAt(i).setBackgroundResource(
 9                         R.drawable.page_indicator_unfocused);
10 
11             }
12 
13         }


// 当滑动到最后一个添加按钮点击进去
		if (Position == img.size() - 1) {
			text.setVisibility(View.VISIBLE);
		} else {
			text.setVisibility(View.GONE);
		}





3.此处有代码解释




 1 // 当滑动状态改变时调用
 2     @Override
 3     public void onPageScrollStateChanged(int arg0) {
 4     }
 5 
 6     // 当当前页面被滑动时调用
 7     @Override
 8     public void onPageScrolled(int arg0, float arg1, int arg2) {
 9     }
10 
11     // 当新的页面被选中时调用
12     @Override
13     public void onPageSelected(int arg0) {
14         // 设置底部小点选中状态
15         monitorPoint(arg0);
16     }
17     




 


 


 






            

            
posted @ 
2017-03-01 22:27 
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