com.bruce.study.demo.studydata.viewpage.ViewPagerActivity.java Source code

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Here is the source code for com.bruce.study.demo.studydata.viewpage.ViewPagerActivity.java

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/*
 * BruceHurrican
 * Copyright (c) 2016.
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 *    This document is Bruce's individual learning the android demo, wherein the use of the code from the Internet, only to use as a learning exchanges.
 *   And where any person can download and use, but not for commercial purposes.
 *   Author does not assume the resulting corresponding disputes.
 *   If you have good suggestions for the code, you can contact BurrceHurrican@foxmail.com
 *   Bruce'sandroiddemo, ?????
 *   ?, ?
 *   ??
 *   ???BurrceHurrican@foxmail.com
 */

package com.bruce.study.demo.studydata.viewpage;

import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageView;
import com.bruce.study.demo.R;
import com.bruce.study.demo.base.BaseActivity;

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

/**
 * ViewPager
 * Created by BruceHurrican on 2015/8/1.
 */
public class ViewPagerActivity extends BaseActivity {
    private List<View> pageViews;
    private ImageView[] imageViews;

    @Override
    public String getTAG() {
        return null;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        LayoutInflater inflater = getLayoutInflater();
        pageViews = new ArrayList<>(5);
        pageViews.add(inflater.inflate(R.layout.viewpager_item_01, null));
        pageViews.add(inflater.inflate(R.layout.viewpager_item_02, null));
        pageViews.add(inflater.inflate(R.layout.viewpager_item_03, null));
        pageViews.add(inflater.inflate(R.layout.viewpager_item_04, null));

        imageViews = new ImageView[pageViews.size()];
        ViewGroup main = (ViewGroup) inflater.inflate(R.layout.viewpager_activity, null);
        ViewGroup group = (ViewGroup) main.findViewById(R.id.ll_viewgroup);
        ViewPager viewPager = (ViewPager) main.findViewById(R.id.vp_guide);
        for (int i = 0; i < pageViews.size(); i++) {
            ImageView imageView = new ImageView(ViewPagerActivity.this);
            imageView.setLayoutParams(new ViewGroup.LayoutParams(20, 20));
            imageView.setPadding(20, 0, 20, 0);
            imageViews[i] = imageView;
            if (i == 0) {
                imageViews[i].setBackgroundResource(R.drawable.viewpager_indicator_focused);
            } else {
                imageViews[i].setBackgroundResource(R.drawable.viewpage_indicator);
            }
            group.addView(imageViews[i]);
        }
        setContentView(main);
        viewPager.setAdapter(new MyViewPagerAdapter());
        viewPager.setOnPageChangeListener(new PageChangeListener());
    }

    /**
     * ?Adapter
     */
    private class MyViewPagerAdapter extends PagerAdapter {

        @Override
        public int getCount() {
            return pageViews.size();
        }

        @Override
        public boolean isViewFromObject(View view, Object o) {
            return view.equals(o);
        }

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

        @Override
        public Object instantiateItem(View container, int position) {
            ((ViewPager) container).addView(pageViews.get(position));
            return pageViews.get(position);
        }

        @Override
        public void restoreState(Parcelable state, ClassLoader loader) {
        }

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

        @Override
        public void startUpdate(View container) {
        }

        @Override
        public void finishUpdate(View container) {
        }
    }

    private class PageChangeListener implements ViewPager.OnPageChangeListener {

        @Override
        public void onPageScrolled(int i, float v, int i1) {

        }

        @Override
        public void onPageSelected(int i) {
            for (int j = 0; j < imageViews.length; j++) {
                imageViews[i].setBackgroundResource(R.drawable.viewpager_indicator_focused);
                if (i != j) {
                    imageViews[j].setBackgroundResource(R.drawable.viewpage_indicator);
                }
            }
        }

        @Override
        public void onPageScrollStateChanged(int i) {

        }
    }
}