Android高手进阶教程(二十七)之---基于ViewFlipper实现的自定义新手指引控件.

第一步:新建Android工程ViewFlipperDemo：

第二步:新建AdverView.java代码如下:

package com.tutor.viewflipper;


import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ViewFlipper;

/**
 * @author frankiewei.
 * 广告推荐插件,可以自定义img个数.
 */
public class AdvserView extends FrameLayout {

    /**
     * 当前索引值.默认第一张图片被选中.
     */
    private int mCurrentIndex = 0;

    /**
     * 上下文.
     */
    private Context mContext;

    /**
     * 点击屏幕的X左边值.
     */
    private float startX;

    /**
     * 设备的宽度.
     */
    private int mDisplayWidth;

    /**
     * 从左到右进入的动画.
     */
    private Animation mLeft2RightInAnimation;

    /**
     * 从左到右出去动画.
     */
    private Animation mLeft2RightOutAnimation;

    /**
     * 从右到左进入动画.
     */
    private Animation mRight2LeftInAnimation;

    /**
     * 从右到左出去动画.
     */
    private Animation mRight2LeftOutAnimation;

    /**
     * 动画播放时间.
     */
    private long duration = 1000;

    /**
     * ViewFlipper控件,继承FrameLayout，图片的容器.
     */
    private ViewFlipper mViewFlipper;

    /**
     * 下面动态生成点点tip的容器.
     */
    private LinearLayout mTipLinearLayout;

    /**
     * 正常点点的Bitmap.
     */
    private Bitmap mPointNorBitmap;

    /**
     * 被选中的点点的Bitmap.
     */
    private Bitmap mPointSelBitmap;


    /**
     * 这里是要显示的广告图片的资源ID，可以自定义个数.
     */
    private int[] imgResIds = {R.drawable.test1,R.drawable.test2,R.drawable.test3,
            R.drawable.test4,R.drawable.test5};

    public AdvserView(Context context) {
        super(context);
        setupViews();
    }

    public AdvserView(Context context,AttributeSet attr) {
        super(context,attr);
        setupViews();
    }

    private void setupViews(){

        mContext = getContext();
        mDisplayWidth = getResources().getDisplayMetrics().widthPixels;

        mViewFlipper = new ViewFlipper(mContext);
        mTipLinearLayout = new LinearLayout(mContext);

        mPointNorBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.point_normal);

        mPointSelBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.point_selected);

        //将广告图片加入ViewFlipper.
        for(int i = 0; i < imgResIds.length; i++){
            ImageView imageView = new ImageView(mContext);
            imageView.setImageResource(imgResIds[i]);
            mViewFlipper.addView(imageView);
        }
        //将点点动态加入Linerlayout.
        for(int j = 0; j < imgResIds.length; j++){
            ImageView imageview = new ImageView(mContext);
            if(j == 0){
                imageview.setImageBitmap(mPointSelBitmap);
            }else{
                imageview.setImageBitmap(mPointNorBitmap);
            }

            mTipLinearLayout.addView(imageview);
        }
        addView(mViewFlipper);
        addView(mTipLinearLayout);
        mTipLinearLayout.setGravity(Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL);

        //初始化动画.
        mLeft2RightInAnimation = new TranslateAnimation(-mDisplayWidth, 0, 0, 0);
        mLeft2RightInAnimation.setDuration(duration);
        mLeft2RightOutAnimation = new TranslateAnimation(0, mDisplayWidth, 0, 0);
        mLeft2RightOutAnimation.setDuration(duration);

        mRight2LeftInAnimation = new TranslateAnimation(mDisplayWidth, 0, 0, 0);
        mRight2LeftInAnimation.setDuration(duration);
        mRight2LeftOutAnimation = new TranslateAnimation(0, -mDisplayWidth, 0, 0);
        mRight2LeftOutAnimation.setDuration(duration);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            startX = event.getX();
            break;
        case MotionEvent.ACTION_UP:
            ImageView lastSelImageView  = (ImageView)mTipLinearLayout.getChildAt(mCurrentIndex);
            //判断左右滑动切换图片.
            if(event.getX() > startX){
                mViewFlipper.setInAnimation(mLeft2RightInAnimation);
                mViewFlipper.setOutAnimation(mLeft2RightOutAnimation);
                mViewFlipper.showNext();
                mCurrentIndex++;
                if(mCurrentIndex > imgResIds.length -1){
                    mCurrentIndex = 0;
                }


            }else if(event.getX() < startX){
                mViewFlipper.setInAnimation(mRight2LeftInAnimation);
                mViewFlipper.setOutAnimation(mRight2LeftOutAnimation);
                mViewFlipper.showPrevious();
                mCurrentIndex--;
                if(mCurrentIndex < 0){
                    mCurrentIndex = imgResIds.length -1;
                }
            }
            ImageView imageview = (ImageView)mTipLinearLayout.getChildAt(mCurrentIndex);
            imageview.setImageBitmap(mPointSelBitmap);
            lastSelImageView.setImageBitmap(mPointNorBitmap);
            break;
        default:
            break;
        }

        return true;
    }
}

第三步:修改ViewFlipperDemoActivity.java代码如下:

package com.tutor.viewflipper;

import android.app.Activity;
import android.os.Bundle;

public class ViewFlipperDemoActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new AdvserView(this));
    }
}

第四步:运行效果如下:

  

转自http://blog.csdn.net/android_tutor/article/details/7667369