UserGuideActivity.java

package me.pjq.pushup.activity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import com.viewpagerindicator.PageIndicator;
import me.pjq.pushup.AppPreference;
import me.pjq.pushup.R;
import me.pjq.pushup.navigation.MainActivity;
import me.pjq.pushup.widget.CustomerViewPager;

public class UserGuideActivity extends Activity {
    private static final String TAG = UserGuideActivity.class.getSimpleName();

    private static final int MAX_PAGE = 5;

    public static final String EXTRAS_START_FROM = "from";
    public static final int START_FROM_SPLASH = 100;
    public static final int START_FROM_SETTINGS = START_FROM_SPLASH + 1;
    private int mStartFrom;
    private CustomerViewPager mCustomerViewPager;
    private MyPagerAdapter mMyPagerAdapter;
    private boolean mIsFinished = false;
    private PageIndicator indicator;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.page_user_guide);
        mCustomerViewPager = (CustomerViewPager) findViewById(R.id.guide_view_pager);
        mMyPagerAdapter = new MyPagerAdapter();
        mCustomerViewPager.setAdapter(mMyPagerAdapter);

        mStartFrom = getIntent().getIntExtra(EXTRAS_START_FROM, START_FROM_SPLASH);

        indicator = (PageIndicator) findViewById(R.id.indicator);
        indicator.setViewPager(mCustomerViewPager);
        indicator.setOnPageChangeListener(onPageChangeListener);

        // Already show the user guide.
        AppPreference.getInstance(getApplicationContext()).setShouldShowUserGuard(false);
    }

    private ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
//            EFLogger.i(TAG, "onPageScrolled, arg0=" + arg0 + ", arg1=" + arg1 + ",arg2=" + arg2);
            if (arg0 == (MAX_PAGE - 1)) {
                if (mIsFinished == false && arg1 > 0.1) {
                    mIsFinished = true;
                    finishUserGuide();
                }
            }
        }

        @Override
        public void onPageSelected(int i) {
        }

        @Override
        public void onPageScrollStateChanged(int i) {
        }
    };

    private void finishUserGuide() {
        if (START_FROM_SPLASH == mStartFrom) {
            Intent intent = new Intent(UserGuideActivity.this, MainActivity.class);
            startActivity(intent);
            finish();
        } else if (START_FROM_SETTINGS == mStartFrom) {
            finish();
        } else {
            finish();
        }
    }

    private class MyPagerAdapter extends PagerAdapter {

        @Override
        public int getCount() {
            return MAX_PAGE + 1;
        }

        private View createItemView(LayoutInflater inflater, int drawableResId) {
            int resId = R.layout.user_guide_item;
            View view = inflater.inflate(resId, null);
            ImageView imageView = (ImageView) view.findViewById(R.id.helperImageView);
            imageView.setImageResource(drawableResId);

            return view;
        }

        @Override
        public Object instantiateItem(View collection, int position) {

            LayoutInflater inflater = (LayoutInflater) collection.getContext().getSystemService(
                    Context.LAYOUT_INFLATER_SERVICE);

            int resId = 0;
            View view = null;
            switch (position) {
                case 0:
                    view = createItemView(inflater, R.drawable.helper1);
                    break;
                case 1:
                    view = createItemView(inflater, R.drawable.helper2);
                    break;
                case 2:
                    view = createItemView(inflater, R.drawable.helper3);

//                ImageView startImageView = (ImageView) view.findViewById(R.id.page_user_guide_start_imageview);
//
//                startImageView.setOnClickListener(new View.OnClickListener() {
//
//                    @Override
//                    public void onClick(View v) {
//                        // finish();
//                        Intent intent = new Intent(UserGuideActivity.this, MainActivity.class);
//                        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
//                        startActivity(intent);
//                        finish();
//                    }
//                });
                    break;
                case 3:
                    view = createItemView(inflater, R.drawable.helper4);
                    break;

                case 4:
                    view = createItemView(inflater, R.drawable.helper5);
                    break;

                case MAX_PAGE:
                    resId = R.layout.user_guide_empty;
                    view = inflater.inflate(resId, null);
                    break;
            }
            ((ViewPager) collection).addView(view, 0);

            return view;
        }

        @Override
        public void destroyItem(View arg0, int arg1, Object arg2) {
            ((ViewPager) arg0).removeView((View) arg2);

        }

        @Override
        public boolean isViewFromObject(View arg0, Object arg1) {
            return arg0 == ((View) arg1);

        }

        @Override
        public Parcelable saveState() {
            return null;
        }
    }


    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (KeyEvent.KEYCODE_BACK == keyCode) {
            finishUserGuide();
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }
}