package com.wpc.library.widget;
|
|
import android.content.Context;
|
import android.util.AttributeSet;
|
import android.view.MotionEvent;
|
import android.widget.EditText;
|
|
/**
|
* Created by Sherlock on 2017/6/14.
|
* 用于解决嵌套Scrollview的时候由于多行而产生的滑动冲突问题
|
*/
|
public class EditTextWithScrollView extends EditText {
|
|
//滑动距离的最大边界
|
private int mOffsetHeight;
|
|
//是否到顶或者到底的标志
|
private boolean mBottomFlag = false;
|
private boolean mCanVerticalScroll;
|
|
public EditTextWithScrollView(Context context) {
|
super(context);
|
init();
|
}
|
|
public EditTextWithScrollView(Context context, AttributeSet attrs) {
|
super(context, attrs);
|
init();
|
}
|
|
public EditTextWithScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
|
super(context, attrs, defStyleAttr);
|
init();
|
}
|
|
private void init() {
|
}
|
|
@Override
|
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
|
mCanVerticalScroll = canVerticalScroll();
|
}
|
|
@Override
|
public boolean dispatchTouchEvent(MotionEvent event) {
|
if (event.getAction() == MotionEvent.ACTION_DOWN)
|
//如果是新的按下事件，则对mBottomFlag重新初始化
|
mBottomFlag = false;
|
//如果已经不要这次事件，则传出取消的信号，这里的作用不大
|
if (mBottomFlag)
|
event.setAction(MotionEvent.ACTION_CANCEL);
|
|
return super.dispatchTouchEvent(event);
|
}
|
|
@Override
|
public boolean onTouchEvent(MotionEvent event) {
|
boolean result = super.onTouchEvent(event);
|
if (mCanVerticalScroll) {
|
//如果是需要拦截，则再拦截，这个方法会在onScrollChanged方法之后再调用一次
|
if (!mBottomFlag)
|
getParent().requestDisallowInterceptTouchEvent(true);
|
} else {
|
getParent().requestDisallowInterceptTouchEvent(false);
|
}
|
return result;
|
}
|
|
@Override
|
protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
|
super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
|
if (vert == mOffsetHeight || vert == 0) {
|
//这里触发父布局或祖父布局的滑动事件
|
getParent().requestDisallowInterceptTouchEvent(false);
|
mBottomFlag = true;
|
}
|
}
|
|
/**
|
* EditText竖直方向是否可以滚动
|
*
|
* @return true：可以滚动 false：不可以滚动
|
*/
|
private boolean canVerticalScroll() {
|
//滚动的距离
|
int scrollY = getScrollY();
|
//控件内容的总高度
|
int scrollRange = getLayout().getHeight();
|
//控件实际显示的高度
|
int scrollExtent = getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
|
//控件内容总高度与实际显示高度的差值
|
mOffsetHeight = scrollRange - scrollExtent;
|
|
if (mOffsetHeight == 0) {
|
|
return false;
|
}
|
|
return (scrollY > 0) || (scrollY < mOffsetHeight - 1);
|
}
|
}
|
