FoundFragment.java

package cn.fanfan.found;

import cn.fanfan.main.R;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;

public class FoundFragment extends Fragment {
	private int offset = 0;// ����ͼƬƫ����
	private int currIndex = 0;// ��ǰҳ�����
	private int bmpW;// ����ͼƬ���
	private int itemcount = 3;
	private ViewPager viewPager;
	private ImageView cursor;// ����ͼƬ
	private TextView t1, t2, t3;// ҳ��ͷ��
	private FoundPageAdapter foundPageAdapter;

	public FoundFragment() {
		// TODO Auto-generated constructor stub
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {

		View rootView = inflater.inflate(R.layout.found_fragment, container,
				false);

		cursor = (ImageView) rootView.findViewById(R.id.cursor);
		DisplayMetrics dm = new DisplayMetrics();
		getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
		int screenW = dm.widthPixels;// ��ȡ�ֱ��ʿ��
		LayoutParams ps = cursor.getLayoutParams();
		ps.width = screenW / 3;
		cursor.setLayoutParams(ps);
		t1 = (TextView) rootView.findViewById(R.id.text1);
		t2 = (TextView) rootView.findViewById(R.id.text2);
		t3 = (TextView) rootView.findViewById(R.id.text3);
		viewPager = (ViewPager) rootView.findViewById(R.id.foundpager);
		InitTextView();
		InitImageView();
		InitViewPager();
		return rootView;
	}

	private void InitTextView() {
		t1.setOnClickListener(new MyOnClickListener(0));
		t2.setOnClickListener(new MyOnClickListener(1));
		t3.setOnClickListener(new MyOnClickListener(2));

	}

	private void InitViewPager() {

		foundPageAdapter = new FoundPageAdapter(getActivity()
				.getSupportFragmentManager());
		viewPager.setAdapter(foundPageAdapter);
		viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
	}

	private void InitImageView() {
		bmpW = BitmapFactory.decodeResource(getActivity().getResources(),
				R.drawable.cursor_min).getWidth();// ��ȡͼƬ���
		DisplayMetrics dm = new DisplayMetrics();
		getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
		int screenW = dm.widthPixels;// ��ȡ�ֱ��ʿ��
		LayoutParams params = cursor.getLayoutParams();
		params.width = screenW / 3;
		cursor.setLayoutParams(params);
		offset = (screenW / itemcount - bmpW) / 2;// ����ƫ����
		Matrix matrix = new Matrix();
		matrix.postTranslate(offset, 0);
		cursor.setImageMatrix(matrix);// ���ö�����ʼλ��
	}

	public class MyOnClickListener implements View.OnClickListener {
		private int index = 0;

		public MyOnClickListener(int i) {
			index = i;
		}

		@Override
		public void onClick(View v) {
			viewPager.setCurrentItem(index);
		}
	};

	public class FoundPageAdapter extends FragmentStatePagerAdapter {

		public FoundPageAdapter(FragmentManager fm) {
			// TODO Auto-generated constructor stub
			super(fm);
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return 3;
		}

		@Override
		public Fragment getItem(int position) {
			// TODO Auto-generated method stub
			return FoundArrayFragment.newInstance(position);
		}
	}

	public class MyOnPageChangeListener implements OnPageChangeListener {

		int one = offset * 2 + bmpW;

		@Override
		public void onPageSelected(int arg0) {
			// TODO Auto-generated method stub
			Animation animation = null;
			if (currIndex == 0) {
				animation = new TranslateAnimation(offset, one * arg0, 0, 0);
			} else {
				animation = new TranslateAnimation(one * currIndex, one * arg0,
						0, 0);
			}
			currIndex = arg0;
			animation.setFillAfter(true);// True:ͼƬͣ�ڶ�������λ��
			animation.setDuration(200);
			cursor.startAnimation(animation);

		}

		@Override
		public void onPageScrollStateChanged(int arg0) {
			// TODO Auto-generated method stub

		}

		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {
			// TODO Auto-generated method stub

		}

	}
}