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Android的 ViewPager 学习笔记

2014-08-17 19:55 204 查看
说明：

ViewPager用于实现多页面的切换效果，该类存在于Google的兼容包里面，所以在引用时记得在BuilldPath中加入“android-support-v4.jar”

主布局文件

main.xml

查看源码

打印?

01
<?
xml

version
=
"1.0"

encoding
=
"utf-8"
?>
02
<
LinearLayout

xmlns:android
=
"http://schemas.android.com/apk/res/android"
03
android:layout_width
=
"fill_parent"
04
android:layout_height
=
"fill_parent"
05
android:orientation
=
"vertical"

>
06
07
<
android.support.v4.view.ViewPager
08
android:id
=
"@+id/viewpager"
09
android:layout_width
=
"wrap_content"
10
android:layout_height
=
"wrap_content"
11
android:layout_gravity
=
"center"

>
12
13
<
android.support.v4.view.PagerTitleStrip
14
android:id
=
"@+id/pagertitle"
15
android:layout_width
=
"wrap_content"
16
android:layout_height
=
"wrap_content"
17
android:layout_gravity
=
"top"

/>
18
</
android.support.v4.view.ViewPager
>
19
20
</
LinearLayout
>
其中ViewPager为多页显示控件，PagerTitleStrip用于显示当前页面的标题

主窗口代码：

PagerTitleDemoActivity.java

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01
package

com.ns.pager;
02
03
import

java.util.ArrayList;
04
05
import

android.app.Activity;
06
import

android.os.Bundle;
07
import

android.support.v4.view.PagerAdapter;
08
import

android.support.v4.view.PagerTitleStrip;
09
import

android.support.v4.view.ViewPager;
10
import

android.view.LayoutInflater;
11
import

android.view.View;
12
13
public
class
PagerTitleDemoActivity
extends

Activity{
14
/**Calledwhentheactivityisfirstcreated.*/
15
private

ViewPagermViewPager;
16
private

PagerTitleStripmPagerTitleStrip;
17
@Override
18
public

void
onCreate(BundlesavedInstanceState){
19
super
.onCreate(savedInstanceState);
20
setContentView(R.layout.main);
21
mViewPager=(ViewPager)findViewById(R.id.viewpager);
22
mPagerTitleStrip=(PagerTitleStrip)findViewById(R.id.pagertitle);
23
24
//将要分页显示的View装入数组中
25
LayoutInflatermLi=LayoutInflater.from(
this
);
26
Viewview1=mLi.inflate(R.layout.view1,
null
);
27
Viewview2=mLi.inflate(R.layout.view2,
null
);
28
Viewview3=mLi.inflate(R.layout.view3,
null
);
29
30
//每个页面的Title数据
31
final

ArrayList<View>views=
new

ArrayList<View>();
32
views.add(view1);
33
views.add(view2);
34
views.add(view3);
35
36
final

ArrayList<String>titles=
new

ArrayList<String>();
37
titles.add(
"tab1"
);
38
titles.add(
"tab2"
);
39
titles.add(
"tab3"
);
40
41
//填充ViewPager的数据适配器
42
PagerAdaptermPagerAdapter=
new
PagerAdapter(){
43
44
@Override
45
public

boolean
isViewFromObject(Viewarg0,Objectarg1){
46
return

arg0==arg1;
47
}
48
49
@Override
50
public

int
getCount(){

51
return

views.size();
52
}
53
54
@Override
55
public

void
destroyItem(Viewcontainer,
int
position,Objectobject){
56
((ViewPager)container).removeView(views.get(position));
57
}
58
59
@Override
60
public

CharSequencegetPageTitle(
int

position){
61
return

titles.get(position);
62
}
63
64
@Override
65
public

ObjectinstantiateItem(Viewcontainer,
int

position){
66
((ViewPager)container).addView(views.get(position));
67
return

views.get(position);
68
}
69
};
70
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mViewPager.setAdapter(mPagerAdapter);
72
}

73
}


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