第一步，为了方便新建Popuwindow，自建BasePopupWindow，里面封装了PopupWindow 基于 view 位置显示的方法
BasePopupWindow.java
/***
* PopupWindow基类
*
* @author pei
* @version 1.0
* @cretae 2016-7-21
* @注：若要popwindow点击外部消失，则设置 this.setFocusable(true)
* 若要popwindow点击外部不消失，不做setFocusable设置，也不要设置成this.setFocusable(false)
*
*/
public abstract class BasePopupWindow extends PopupWindow {
protected View mLayoutView;
protected int mLayoutId;
protected Context mContext;
protected int mWidth;
protected int mHeight;
public BasePopupWindow(int width, int height, int layoutId, Context context) {
this.mWidth = width;
this.mHeight = height;
this.mLayoutId = layoutId;
this.mContext = context;
mLayoutView = LayoutInflater.from(context).inflate(mLayoutId, null);
setWindow();
}
/** PopupWindow基本设置 **/
protected void setWindow() {
this.setContentView(mLayoutView);
this.setWidth(mWidth);
this.setHeight(mHeight);
// this.setFocusable(true);// 可点击
// 实例化一个ColorDrawable颜色为半透明(半透明遮罩颜色代码#66000000)
ColorDrawable dw = new ColorDrawable(Color.TRANSPARENT);
this.setBackgroundDrawable(dw);
}
/** PopupWindow背景设置 **/
protected void setBackground(int color) {
// 实例化一个ColorDrawable颜色为半透明
ColorDrawable dw = new ColorDrawable(color);
this.setBackgroundDrawable(dw);
}
protected abstract void initView();
protected abstract void initData();
protected abstract void setListener();
/** PopupWindow点击间隙处理，根据实际情况重写 **/
protected void onTouchdimiss() {
// mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
mLayoutView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
// int height = mLayoutView.getTop();
// int y = (int) event.getY();
// if (event.getAction() == MotionEvent.ACTION_UP) {
// if (y < height) {
// dismiss();
// }
// }
return false;
}
});
}
/**
* 显示在控件正上方
*
* @param view
* 依赖的控件
* @param marginDp
* 设置的间距(直接写数字即可，已经做过dp2px转换)
*/
public void showAtLocationTop(View view, float marginDp) {
mLayoutView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int popupWidth = mLayoutView.getMeasuredWidth();
int popupHeight = mLayoutView.getMeasuredHeight();
int[] location = new int[2];
view.getLocationOnScreen(location);
showAtLocation(view, Gravity.NO_GRAVITY, (location[0] + view.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight - dp2px(marginDp));
update();
}
/**
* 显示在控件正下方
*
* @param view
* 依赖的控件
* @param marginDp
* 设置的间距(直接写数字即可，已经做过dp2px转换)
*/
public void showAtLocationGravityBottom(View view, float marginDp) {
mLayoutView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int popupWidth = mLayoutView.getMeasuredWidth();
int popupHeight = mLayoutView.getMeasuredHeight();
int[] location = new int[2];
view.getLocationOnScreen(location);
showAtLocation(view, Gravity.NO_GRAVITY, (location[0]+view.getWidth()/2)-popupWidth/2,
location[1]+view.getHeight()+dp2px(marginDp));
update();
}
/**显示在控件下方
*
* @param view 依赖的控件
* @param marginDp 设置的间距(直接写数字即可，已经做过dp2px转换)
*/
public void showAtLocationBottom(View view, float marginDp){
showAsDropDown(view, 0, dp2px(marginDp));
update();
}
/**
* 显示在控件左方
*
* @param view
* 依赖的控件
* @param marginDp
* 设置的间距(直接写数字即可，已经做过dp2px转换)
*/
public void showAtLocationLeft(View view, float marginDp) {
mLayoutView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int popupWidth = mLayoutView.getMeasuredWidth();
int popupHeight = mLayoutView.getMeasuredHeight();
int[] location = new int[2];
view.getLocationOnScreen(location);
showAtLocation(view, Gravity.NO_GRAVITY, location[0] - popupWidth - dp2px(marginDp), (location[1] + view.getHeight() / 2) - popupHeight / 2);
update();
}
/**
* 显示在控件右方
*
* @param view
* 依赖的控件
* @param marginDp
* 设置的间距(直接写数字即可，已经做过dp2px转换)
*/
public void showAtLocationRight(View view, float marginDp) {
mLayoutView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int popupWidth = mLayoutView.getMeasuredWidth();
int popupHeight = mLayoutView.getMeasuredHeight();
int[] location = new int[2];
view.getLocationOnScreen(location);
showAtLocation(view, Gravity.NO_GRAVITY, location[0] + view.getWidth() + dp2px(marginDp), (location[1] + view.getHeight() / 2) - popupHeight / 2);
update();
}
/** dp转px **/
private int dp2px(float dpVal) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpVal, mContext.getResources().getDisplayMetrics());
}
/** 通过id获得view **/
@SuppressWarnings("unchecked")
protected <T extends View> T getView(int viewId) {
View view = null;
if (mLayoutView == null) {
mLayoutView = LayoutInflater.from(mContext).inflate(mLayoutId, null);
}
view = mLayoutView.findViewById(viewId);
return (T) view;
}
}
第二步，写一个简单的TestPop继承BasePopuWindow，用于做测试，TestPop 代码如下：
/**
* Instruction:用于测试的popuwindow
* <p>
* Author:pei
* Date: 2017/6/28
* Description:
*/
public class TestPop extends BasePopupWindow{
public TestPop(Context context) {
super(ScreenUtil.dp2px(100,context), ScreenUtil.dp2px(50,context), R.layout.pop_order, context);
initView();
initData();
setListener();
}
@Override
protected void initView() {
}
@Override
protected void initData() {
setFocusable(true);
setAnimationStyle(R.style.popuwindow_up_style);//popuwindow显示隐藏的动画
}
@Override
protected void setListener(){
}
}
http://www.jianshu.com/p/c3c30357d617
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