com.xzh.chatview.view.viewpagerindicator.ViewPagerIndicator.java Source code

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Here is the source code for com.xzh.chatview.view.viewpagerindicator.ViewPagerIndicator.java

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/*
The Android Open Source Project
Copyright (c) 2014-7-22 wangzheng <iswangzheng@gmail.com>
    
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.
@author wangzheng  DateTime 2014-7-22
 */

package com.xzh.chatview.view.viewpagerindicator;

import android.annotation.SuppressLint;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;

import com.xzh.chatview.R;

import java.util.TimerTask;

@SuppressLint("NewApi")
public class ViewPagerIndicator extends LinearLayout {

    private ViewPager vp = null;
    private CirclePageIndicator cpi = null;
    //   private Timer timer = null;
    private int index = 0;
    private boolean isScroll = false;
    private boolean isActive = false;

    public ViewPagerIndicator(Context context) {
        this(context, null);
    }

    public ViewPagerIndicator(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ViewPagerIndicator(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        if (vp == null)
            init(context);
    }

    public ViewPagerIndicator(Context context, int layoutId) {
        super(context);
        if (vp == null)
            init(context, layoutId);
    }

    private void init(Context context) {// viewpager_indicator_layout
        init(context, -1);
    }

    private void init(Context context, int layoutId) {
        if (layoutId == -1) {
            inflate(context, R.layout.viewpager_indicator_layout, this);
        } else {
            inflate(context, layoutId, this);
        }
        vp = (ViewPager) findViewById(R.id.pager);
        cpi = (CirclePageIndicator) findViewById(R.id.indicator);
        //      timer = new Timer();
    }

    private int pagerCount = 0;

    public void setAdapter(PagerAdapter adapter) {
        if (adapter != null) {
            vp.setAdapter(adapter);
            cpi.setViewPager(vp);
            cpi.setOnPageChangerListener(listener);
            cpi.setCurrentItem(0);
            index = 0;
            if (!isActive) {
                try {
                    //               timer.schedule(new Tasker(), 3000, 5000);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                isActive = true;
            }
            pagerCount = adapter.getCount();
            if (pagerCount == 1)
                cpi.setVisibility(View.GONE);
            else
                cpi.setVisibility(View.VISIBLE);
        }
    }

    class Tasker extends TimerTask {
        @Override
        public void run() {
            if (!isScroll) {
                post(new Runnable() {
                    public void run() {
                        vp.setCurrentItem(index);
                        ++index;
                        if (index > pagerCount - 1)
                            index = 0;
                    }
                });
            }
        }
    }

    private OnPageChangeListener listener = new OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            index = position;
        }

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        }

        @Override
        public void onPageScrollStateChanged(int state) {
            switch (state) {
            case 0:
                isScroll = false;
                break;
            case 1:
                isScroll = true;
                break;
            case 2:
                isScroll = false;
                break;

            default:
                break;
            }
        }
    };

    public void stop() {
        isScroll = true;
    }

    public void reStart() {
        isScroll = false;
    }

    public void destory() {
        //      timer.cancel();
        isActive = false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            isScroll = true;
            break;
        case MotionEvent.ACTION_UP:
            isScroll = false;
            break;
        }
        return super.onInterceptTouchEvent(ev);
    }

    public void setActive(boolean isActive) {
        this.isActive = isActive;
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public void setViewPagerMinHeight(int minHeight) {
        if (vp != null)
            vp.setMinimumHeight(minHeight);
    }

    public ViewPager getViewPager() {
        return vp;
    }
}