viewpager android viewGroup左右滑动方法1

它是实现左右两个屏幕平滑地切换的一个类，它是Google提供的，作为Android的一个补充。先上个效果图把，让大家有个直观的认识。

Layout manager that allows the user to flip left and right through pages of data. You supply an implementation of a

PagerAdapter

to generate the pages that the view shows.

1、下载来Android SDK & AVD manager的更新：Available Packages -> Android Repository -> Android Compatibility Package, revision 3. 它将安装在\extras\android\compatibility\v4文件下

2、建立一个Android项目，在上述安装目录下把 android-support-v4.jar添加进项目，如果是最新的ADT，只需要右击project->Android Tools->Add Compatibility Library

3、在Activity中使用ViewPager

4、如果ViewPager是用xml去定义的，需要写上全局的路径，如：

view plaincopy to clipboard

<android.support.v4.view.ViewPager

android:layout_width="match_parent"

android:layout_height="match_parent"

android:id="@+id/awesomepager"/>

[java] view plaincopy

<android.support.v4.view.ViewPagerandroid:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/awesomepager"/>

5、建立一个PagerAdapter，实现如下方法：

getCount(), instantiateItem(), destroyItem()， isViewFromObject() 。

view plaincopy to clipboard

public class AwesomePagerActivity extends Activity {

private ViewPager awesomePager;

private Context cxt;

private AwesomePagerAdapter awesomeAdapter;

private LayoutInflater mInflater;

private List<View> mListViews;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

cxt = this;

awesomeAdapter = new AwesomePagerAdapter();

awesomePager = (ViewPager) findViewById(R.id.awesomepager);

awesomePager.setAdapter(awesomeAdapter);

mListViews = new ArrayList<View>();

mInflater = getLayoutInflater();

mListViews.add(mInflater.inflate(R.layout.layout1, null));

mListViews.add(mInflater.inflate(R.layout.layout2, null));

mListViews.add(mInflater.inflate(R.layout.layout3, null));

}

private class AwesomePagerAdapter extends PagerAdapter{

@Override

public int getCount() {

return mListViews.size();

}

/**

* 从指定的position创建page

*

* @param container ViewPager容器

* @param position The page position to be instantiated.

* @return 返回指定position的page，这里不需要是一个view，也可以是其他的视图容器.

*/

@Override

public Object instantiateItem(View collection, int position) {

((ViewPager) collection).addView(mListViews.get(position),0);

return mListViews.get(position);

}

/**

* <span >从指定的position销毁page</span>

*

*

*<span >参数同上</span>

*/

@Override

public void destroyItem(View collection, int position, Object view) {

((ViewPager) collection).removeView(mListViews.get(position));

}

@Override

public boolean isViewFromObject(View view, Object object) {

return view==(object);

}

@Override

public void finishUpdate(View arg0) {}

@Override

public void restoreState(Parcelable arg0, ClassLoader arg1) {}

@Override

public Parcelable saveState() {

return null;

}

@Override

public void startUpdate(View arg0) {}

}

}