文章标题

package com.demo.aty;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.os.Build;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.ScrollView;

import com.blog.www.guideview.Guide;
import com.blog.www.guideview.GuideBuilder;
import com.blog.www.guideview.ScrollType;
import com.demo.component.SimpleComponent;

import static com.demo.aty.MyListActivity.TAG;

/**
* Created by Aries on 2017/5/13.
*/

public class MyScrollView extends ScrollView {

private int screenHeight = 0;/** * 要被高亮显示的view */private View targetView;/** * TargetView的高度 */private int height;Activity activity;/** * MaskView是否正显示 */private boolean isShowing;private Guide guide;private GuideBuilder builder;public GuideBuilder getBuilder() {    if (builder == null) {        builder = new GuideBuilder();    }    return builder;}public MyScrollView(Context context) {    this(context, null);}public MyScrollView(Context context, AttributeSet attrs) {    this(context, attrs, 0);}public MyScrollView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    this.activity = (Activity) context;}public void setTargetView(View targetView) {    if (targetView == null) {        throw new RuntimeException("targetView can not be null");    }    this.targetView = targetView;}

// @Override
// protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
// MeasureSpec.AT_MOST);
// super.onMeasure(widthMeasureSpec, expandSpec);
// }

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)@Overrideprotected void onAttachedToWindow() {    super.onAttachedToWindow();    if (targetView == null) {        return;    }    DisplayMetrics outMetrics = new DisplayMetrics();    getDisplay().getMetrics(outMetrics);    screenHeight = outMetrics.heightPixels;    targetView.post(new Runnable() {        @Override        public void run() {            height = targetView.getHeight();        }    });    Log.d(TAG, "onAttachedToWindow: " + screenHeight + "控件的高度" + height);}private int[] getViewLocationOnScreen(View view) {    int[] location = new int[2];    view.getLocationOnScreen(location);    Log.d(TAG, "onAttachedToWindow:height of target view on screen " + location[1]);    return location;}@Overrideprotected void onScrollChanged(int l, int t, int oldl, int oldt) {    super.onScrollChanged(l, t, oldl, oldt);    if (targetView == null) {        return;    }    int[] viewLocationOnScreen = getViewLocationOnScreen(targetView);    int targetViewHeightOnScreen = viewLocationOnScreen[1];    if (targetViewHeightOnScreen <= screenHeight - height) {        //弹出引导框        int i = t - oldt;        Log.d(TAG, "onScrollChanged: " + i);        if (i > 0 && !isShowing) {            isShowing = true;            showGuideView(ScrollType.UP);        } else if (i < 0 && guide != null && isShowing) {            guide.dismiss();            isShowing = false;        }    }    Log.d(TAG, "onScrollChanged: height of target view  " + height);    Log.d(TAG, "onScrollChanged: screen height " + screenHeight);    Log.d(TAG, "onScrollChanged:height of target view on screen " + targetViewHeightOnScreen);}public void showGuideView(ScrollType scrollType) {    //设置共有的配置属性属性    builder = new GuideBuilder();    builder.setAlpha(200).setScrollType(scrollType)            .setTargetView(targetView)            .setHighTargetCorner(20)            .setHighTargetPadding(10)            .setOverlayTarget(false);    builder.addComponent(new SimpleComponent());    guide = builder.createGuide();    guide.setShouldCheckLocInWindow(true);    guide.show(activity);}

}