【andoid】ViewPagerを使う

1.　layout.xmlにViewPagerを配置　
2.　PagerAdapter.javaを実装
3.　ActivityからViewPagerにAdapterを登録する

PagerActivity.java

        mPagerAdapter = new MyPagerAdapter(this);
        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mPagerAdapter);

MyPagerAdapter.java

public class MyPagerAdapter extends PagerAdapter{
    private static final String TAG = MyPagerAdapter.class.getSimpleName();
    
    private Activity act;
    private int count = 3;
    
    public MyPagerAdapter(final Activity activity){
        act = activity;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ((ViewPager)container).removeView((View)object);
    }

    @Override
    public int getCount() {
        Log.v(TAG, "getCount " + String.valueOf(count));
        return count;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        Log.v(TAG, "isViewFromObject");
        return view.equals(object);
    }    
    
    @Override
    public Object instantiateItem(ViewGroup container, int position){
        Log.v(TAG, "instantiateItem " + String.valueOf(position));

        ViewPager pager = (ViewPager)container;
        
        TextView tv = new TextView(act);
        tv.setText("this item is no. " + String.valueOf(position));
        pager.addView(tv, position);
        return tv;
    }
}

layout.xml

    <android.support.v4.view.ViewPager 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />