GuideActivity.java

package com.steven.babyiyo;



import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.support.v4.view.ViewPager.PageTransformer;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.steven.babyiyo.R;
import com.steven.babyiyo.adapter.GuidePagerAdapter;
import com.steven.babyiyo.utlis.ScreenMetrics;







public class GuideActivity extends Activity {
	private LinearLayout linearLayout_guide;
	private Context mContext = this;
	private ImageView[] imageViews;
	private ViewPager viewPager_guide;
	private List<LinearLayout> totalList_linearLayout = new ArrayList<LinearLayout>();
	private static final float MIN_SCALE = 0.75f;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_guide);
		initView();
		initData();
		initImageView();
		initViewPager();
		
	}
	
	private void initView() {
		viewPager_guide = (ViewPager) findViewById(R.id.viewPager_guide);
		linearLayout_guide = (LinearLayout) findViewById(R.id.linearLayout_guide);
		
	}
 
	private void initData() {
		int[] images = new int[] { R.drawable.guide1, R.drawable.guide2,
				R.drawable.guide3 };
		for (int i = 0; i < 3; i++) {
			LinearLayout linearLayout = new LinearLayout(mContext);
			linearLayout.setLayoutParams(new LayoutParams(
					LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
			linearLayout.setBackgroundResource(images[i]);
			totalList_linearLayout.add(linearLayout);
			
		}

				ImageView imageView_enter = new ImageView(mContext);
				LayoutParams layoutParams_enter = new LayoutParams(
						LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
				imageView_enter.setLayoutParams(layoutParams_enter);
				imageView_enter.setBackgroundResource(R.drawable.btn_guide);
				imageView_enter.setOnClickListener(new OnClickListener() {

					@Override
					public void onClick(View v) {
						startActivity(new Intent(mContext, LoginActivity.class));
						//Activity(new Intent(mContext, HomeActivity.class));
						finish();
						overridePendingTransition(R.anim.anim_activity_in,
								R.anim.anim_activity_out);
					}
				});
				totalList_linearLayout.get(2).setGravity(
						Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM);
				totalList_linearLayout.get(2).setPadding(0, 0, 0,ScreenMetrics.getHeight(mContext,9));
				totalList_linearLayout.get(2).addView(imageView_enter);
		
	}

	private void initViewPager() {
	
		viewPager_guide
				.setAdapter(new GuidePagerAdapter(totalList_linearLayout));
		viewPager_guide.setPageTransformer(true, new PageTransformer() {

			@Override
			public void transformPage(View view, float position) {
				int pageWidth = view.getWidth();

				if (position < -1) { // [-Infinity,-1)
					// This page is way off-screen to the left.
					view.setAlpha(0);

				} else if (position <= 0) { // [-1,0]
					// Use the default slide transition when moving to the left
					// page
					view.setAlpha(1);
					view.setTranslationX(0);
					view.setScaleX(1);
					view.setScaleY(1);

				} else if (position <= 1) { // (0,1]
					// Fade the page out.
					view.setAlpha(1 - position);

					// Counteract the default slide transition
					view.setTranslationX(pageWidth * -position);

					// Scale the page down (between MIN_SCALE and 1)
					float scaleFactor = MIN_SCALE + (1 - MIN_SCALE)
							* (1 - Math.abs(position));
					view.setScaleX(scaleFactor);
					view.setScaleY(scaleFactor);

				} else { // (1,+Infinity]
					// This page is way off-screen to the right.
					view.setAlpha(0);
				}
			}

		});

		viewPager_guide.setOnPageChangeListener(new OnPageChangeListener() {

			@Override
			public void onPageSelected(int position) {
				for (int i = 0; i < imageViews.length; i++) {
					imageViews[i]
							.setBackgroundResource(R.drawable.point_nomal);
				}
				imageViews[position]
						.setBackgroundResource(R.drawable.point_focured_green);
			}

			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {

			}

			@Override
			public void onPageScrollStateChanged(int arg0) {

			}
		});
	}

	private void initImageView() {
		imageViews = new ImageView[3];
		for (int i = 0; i < 3; i++) {
			ImageView imageView = new ImageView(mContext);
			LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
					LinearLayout.LayoutParams.WRAP_CONTENT,
					LinearLayout.LayoutParams.WRAP_CONTENT);
			params.rightMargin = 20;
			imageView.setLayoutParams(params);
			imageView.setBackgroundResource(R.drawable.point_nomal);
			imageView.setTag(i);
			imageView.setOnClickListener(new OnClickListener() {

				@Override
				public void onClick(View v) {
					viewPager_guide.setCurrentItem((Integer) v.getTag());
				}
			});
			imageViews[i] = imageView;
			linearLayout_guide.addView(imageView);
		}
		imageViews[0].setBackgroundResource(R.drawable.point_focured_green);
	}

}